131200-HMC900LP5E - Analog Devices / Hittite

Analog Devices Welcomes

Hittite Microwave Corporation

NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED

www.analog.com www.hittite.com

THIS PAGE INTENTIONALLY LEFT BLANK

3 - 1

IF / BASEBAND SIGNAL PROCESSING

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Functional Diagram

Typical Applications Features

General Description

The HMC900LP5E is ideal for various modulation

systems:

• Baseband ltering before A/D or after D/A converters

for point-to-point xed wireless or base station

transceivers (GSM/GPRS, WCDMA & TD-SCDMA)

• Integrated direct conversion receiver (DCR) when

mated with mixer and VGA

• Software dened radio applications

• Anti-aliasing and reconstruction lters

• Test and measurement equipment

Low Noise Figure: 12 dB

High linearity: Output IP3 +30 dBm

Pre-programmed and/or Programmable Bandwidth:

3.5 MHz to 50 MHz. (Please see “HMC900LP5E

Ordering Information”)

Integrated ADC Driver Amplier

Exceptional 3 dB Bandwidth Accuracy: ±2.5%

6th order Butterworth Magnitude & Phase Response

Automatic Filter Calibration

Externally Controlled Common Mode Output Level

Simplies Interface

Filter Bypass Option: 100 MHz Bandwidth

Read/Write Serial Port Interface (SPI)

32 Lead 5x5 mm SMT Package 25 mm2

The HMC900LP5E is a 6th order, programmable

bandwidth, fully calibrated, dual low pass lter. It

features 0 or 10 dB input gain setting and supports

arbitrary bandwidths from 3.5 MHz to 50 MHz,

and when calibrated, is accurate to +/-2.5% of the

desired bandwidth. It includes a 100 MHz bandwidth

lter bypass option while retaining gain setting and

common mode control.

Housed in a compact 5x5 mm SMT QFN package,

the HMC900LP5E requires minimal exter-

nal components and provides a low cost alternative to

more complicated switched discrete lter architectures.

The integrated ADC driver and externally controlled

common mode output level further simplify system

implementations.

Filter calibration for the HMC900LP5E is accomp-

lished with any reference clock rate from 20 to 80

MHz. One time programmable (OTP) memory offers

unsurpassed exibility allowing the user “set and

forget” parameters like gain and bandwidth setting.

Matched lter paths provide excellent quadrature

balance, making the HMC900LP5E ideal for I/Q

communications applications.

The 6th order Butterworth transfer function delivers

superior stop band rejection while maintaining both a

at passband and minimal group delay variation.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 2

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 1. Electrical Specications

TA = +25°C, VDDI, VDDQ, VDDCAL, VDDBG, DVDD = 5V +/-5%, GND = 0V, 400  load unless otherwise stated.

Parameter Conditions Min. Typ. Max. Units

Analog Performance

Passband Gain [1] min gain setting

max gain setting

3dB corner frequency (fc)

Programmable to any frequency in this range

[1] 3.5 50 MHz

Bypass mode 75 100 MHz

3dB corner frequency variation uncalibrated ± 20 %

calibrated ±2.5 ± 3.5 %

3dB corner frequency variation vs temperature over -40°C to +85°C ±0.03 % / °C

Max passband gain error[2] vs ideal 6th order LPF H(s) ±0.5 dB

Max passband group delay variation

(group delay * 3dB frequency fc )

e.g. for 1.0 dB BW of 40 MHz (fc ~ 44.9 MHz):

max group delay variation = 0.400/ 44.9 MHz = 8.9 ns

at 0.1dB BW (~0.73 fc) 0.250

at 0.5dB BW (~0.83 fc) 0.350

at 1.0dB BW (~ 0.89 fc) 0.400

at 3.0dB BW (at fc) 0.400

Output Noise (f = 1 MHz)

min gain, fc = 3.5 MHz 22 nV/rtHz

min gain, fc = 28 MHz 22 nV/rtHz

max gain fc = 3.5 MHz 25 nV/rtHz

max gain, fc = 28 MHz 25 nV/rtHz

Output noise (f > 10*fc)

min gain, fc = 3.5 MHz 8 nV/rtHz

max gain, fc = 3.5 MHz 8 nV/rtHz

min gain fc = 28 MHz 8 nV/rtHz

max gain, fc = 28 MHz 8 nV/rtHz

Noise Figure (100  source) min gain 25 dB

max gain 17 dB

Noise Figure (1 k source) min gain 19 dB

max gain 12 dB

Input referred Passband IM3

half scale tones at 0.8fc and

0.6fc

fc = 20 MHz

fc = 50 MHz[2]

-60

-50

dBc

Input referred Out of Band IM3

half scale tones at 1.2fc and

1.6fc. IM3 product at 0.8fc

fc = 20 MHz

fc = 50 MHz [2]

-60

-50

dBc

Input referred Out of Band IM3

half scale tones at 2fc and 3fc.

IM3 product at 0.5fc

fc = 20 MHz

fc = 50 MHz [2]

-50

-45

dBc

Output IP3 (inband)

half scale tones at 0.8fc and

0.6fc

fc = 20 MHz

fc = 50 MHz

dBm

Output IP3 (out of band)

half scale tones at 1.2fc and

1.6fc. IM3 product at 0.8fc

fc = 20 MHz

fc = 50 MHz [2]

dBm

Output IP3 (out of band)

half scale tones at 2fc and 3fc.

IM3 product at fc

fc = 20 MHz

fc = 50 MHz[2]

dBm

Output IP2 (inband)

half scale tones at 0.8fc and

0.6fc IM2 product at 0.2fc

fc = 20 MHz

fc = 50 MHz [2]

dBm

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 3

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Parameter Conditions Min. Typ. Max. Units

Output IP2 (out of band)[2] half scale tones at 1.2fc and

1.6fc. IM2 product at 0.4fc 60 65 dBm

Sideband Suppression (Uncalibrated) complex signal measured at

0.8fc vs -0.8fc 40 45 dB

I/Q Channel Balance

magnitude

phase

0.04

0.5

I/Q Channel Isolation 60 80 dB

Analog I/O

Differential Input Impedance 1000 

Full Scale Differential Input

(400  Differential Load)

min gain 2 Vppd

max gain 0.613 Vppd

Full Scale Differential Input

(100  Differential Load)

min gain 0.5 Vppd

max gain 0.156 Vppd

Input Common Mode Voltage Range 1 4 V

Full Scale Differential Output 400  Differential Load 2 Vppd

Full Scale Differential Output 100  Differential Load 0.5 Vppd

Output Voltage Range 0.5 Vdd-0.5 V

Output Common Mode Voltage Range Vdd/2-1 Vdd/2 Vdd/2+1 V

Digital I/O

CALCK Frequency Use doubler mode for clocks

between 20 MHz and 40 MHz 20 40 80 MHz

CALCK Duty Cycle 40 50 60 %

SCLK Frequency 20 30 MHz

Digital Input Low Level (VIL) 0.4 V

Digital Input High Level (VIH) 1.5 V

Digital Output Low Level (VOL) 0.4 V

Digital Output High Level (VOH) Vdd - 0.4

Power Supply Analog & Digital Supplies 4.75 5 5.25 V

Supply Current 130 mA

Power on Reset 250 us

Table 1. Electrical Specications, TA = +25°C (Continued)

[1] The attenuation of the lter transfer function can be calculated directly at any frequency f as: attenuation = 10*log10(1+(f/f0)^(2*6)), where

f0 is the 3dB bandwidth or corner frequency for the lter. Similarly, for a given maximum attenuation and 3dB bandwidth, f0, the frequency

at which the attenuation is achieved can be calculated as: f=(10^(attenuation/10) -1)^(1/(2*6)) * f0. Note that for a 6th order Butterworth lter the

1dB bandwidth is at ~89% of the lter bandwidth and 0.5dB bandwidth is at 84% of the lter bandwidth.

[2] Specied distortion is measured with in “high linearity” mode with opamp_bias[1:2]=2 and drvr_bias[1:0] = 2. See Reg 02h.

Parameter Condition

Temperature +25 °C

Filter Bandwidth Setting 20 MHz

Gain Setting 0 dB

bias settings (opamp_bias[1:0]/ drvr_bias[1:0]) 01/10

Input Signal Level 2 Vppd

Input/Output Common Mode Level 2.5V

Output Load 200 / Output

Supply Analog: +5V, Digital +5V

Table 2. Test Conditions

Unless otherwise specied, the following test conditions were used

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 4

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Figure 1. Filter Attenuation

(all Bandwidths) Figure 2. Filter Noise Figure vs Bandwidth[1]

Figure 3. Filter Passband Gain Response Figure 4. Filter Output Noise

Figure 5. Filter 3 dB Cutoff vs

Temperature, 10 MHz Bandwidth

Figure 6. Filter Side Band Rejection vs

Bandwidth

-100

-80

-60

-40

-20

0.1 1 10 100

Bypass

3.5MHz

5MHz

7MHz

10MHz

14MHz

20MHz

28MHz

35MHz

50MHz

FREQUENCY (MHz)

FILTER GAIN (dB)

3.5 MHz

50 MHz

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

1 10 100

3.5MHz

7MHz

5MHz

10MHz

14MHz

20MHz

28MHz

35MHz

50MHz

FREQUENCY (MHz)

FILTER GAIN (dB)

3.5 MHz

50 MHz

-40C

+27C

+85C

FILTER BANDWIDTH (MHz)

NOISE FIGURE (dB)

3.5 5 7 10 14 20 28 35 50

10 dB Gain

0 dB Gain

100

0.001 0.01 0.1 1 10 100

3.5MHz

5MHz

7MHz

10MHz

14MHz

20MHz

28MHz

35MHz

50MHz

FREQUENCY (MHz)

OUTPUT NOISE (nV/rtHz)

50 MHz

3.5 MHz

0dB

10dB

FILTER BANDWIDTH (MHz)

SIDEBAND REJECTION (dBc)

3.5 5 7 10 14 20 28 35 50

-10

-5

5 6 7 8 9 10

-40C

+27C

+85C

FREQUENCY (MHz)

FILTER GAIN (dB)

-3dB

[1] Measured with 100  source impedance

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 5

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Figure 7. In-band OIP3 [1] & OIP2 [1] vs

Temperature, 0 dB Gain (standard bias)

Figure 11. Out-of-band OIP3 [1] and

OIP2 [1] vs Bandwidth (standard bias)

Figure 8. In-band OIP3 [1] and OIP2 [1] vs

Temperature, 0 dB Gain (high linearity)

Figure 9. In-band OIP3 [1] and OIP2 [1] vs

Bandwidth (standard bias)

Figure 10. In-band OIP3 [1] and OIP2 [1] vs

Bandwidth (high linearity)

-40C

85C

27C

-40C

+27C

+85C

FILTER BANDWIDTH (MHz)

OUTPUT IP3 (dBm)

3.5 5 7 10 14 20 28 35 50

OUTPUT IP2 (dBm)

OUTPUT IP2

OUTPUT IP3

Figure 12. Out-of-band OIP3 [1] and

OIP2 [1] vs Bandwidth (high linearity)

-40C

85C

27C

-40C

+27C

+85C

FILTER BANDWIDTH (MHz)

OUTPUT IP3 (dBm)

3.5 5 7 10 14 20 28 35 50

OUTPUT IP2 (dBm)

OUTPUT IP2

OUTPUT IP3

0dB

10dB

0dB

10dB

FILTER BANDWIDTH (MHz)

OUTPUT IP3 (dBm)

3.5 5 7 10 14 20 28 35 50

OUTPUT IP2 (dBm)

OUTPUT IP2

OUTPUT IP3

3.5 5 7 10 14 20 28 35 50

0dB

10dB

0dB

10dB

FILTER BANDWIDTH (MHz)

OUTPUT IP3 (dBm)

OUTPUT IP2 (dBm)

OUTPUT IP2

OUTPUT IP3

0dB

10dB

0dB

10dB

FILTER BANDWIDTH (MHz)

OUTPUT IP3 (dBm)

3.5 5 7 10 14 20 28 35 50

OUTPUT IP2 (dBm)

OUTPUT IP2

OUTPUT IP3

0dB

10dB

0dB

10dB

FILTER BANDWIDTH (MHz)

OUTPUT IP3 (dBm)

3.5 5 7 10 14 20 28 35 50

OUTPUT IP2 (dBm)

OUTPUT IP2

OUTPUT IP3

[1] OIP3 and OIP2 measured into 400  differential load. OIP3 and OIP2 can be translated from dBm into dBVrms as follows:

IPx [dBVrms] = IPx [dBm] -4 dB

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 6

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Figure 13. 3.5 MHz Filter Magnitude and

Group Delay

Figure 14. 50 MHz Filter Magnitude and

Group Delay

Figure 15. HMC900LP5E OIP2 at 10 MHz &

10.1 MHz [1]

-100

-50

100

0.1 1 10

-15

-10

-5

FREQUENCY (MHz)

GAIN (dB)

NORMALIZED GROUP DELAY (ns)

Gain

Group Delay

-100

-80

-60

-40

-20

1 10

3.5MHz

5MHz

7MHz

10MHz

14MHz

20MHz

28MHz

35MHz

50MHz

FREQUENCY (MHz)

I/Q FILTER ISOLATION (dBc)

-10

-8

-6

-4

-2

-10

-5

1 10 100

FREQUENCY (MHz)

GAIN (dB)

NORMALIZED GROUP DELAY (ns)

Gain

Group Delay

-120

-100

-80

-60

-40

-20

-20 -10 0 10 20 30

Vin (dBVrms/tone)

Vout (dBVrms)

fundamental level

third productl level

extrapolated OIP3 = 30 dBV

-150

-100

-50

100

-20 0 20 40 60 80 100

Vin (dBVrms/tone)

Vout (dBVrms)

Measuring Instrument

Noise Floor

fundamental level

second productl level

extrapolated OIP2 = 94 dBV

Figure 16. HMC900LP5E OIP3 at 10 MHz &

10.1 MHz [1]

Figure 17. Filter I/Q Channel Isolation

[1] 14 MHz Coarse BW, Op-Amp bias 01

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 7

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Outline Drawing

NOTES:

[1] PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED PLASTIC

SILICA AND SILICON IMPREGNATED.

[2] LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY.

[3] LEAD AND GROUND PADDLE PLATING: 100% MATTE TIN.

[4] DIMENSIONS ARE IN INCHES [MILLIMETERS].

[5] LEAD SPACING TOLERANCE IS NON-CUMULATIVE.

[6] PAD BURR LENGTH SHALL BE 0.15mm MAX. PAD BURR HEIGHT SHALL

BE 0.25m MAX.

[7] PACKAGE WARP SHALL NOT EXCEED 0.05mm

[8] ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO

PCB RF GOUND.

[9] REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB LAND

PATTERN.

Part Number Package Body Material Lead Finish MSL Rating [1] Package Marking [2]

HMC900LP5E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 H900

XXXX

[1] Max peak reow temperature of 260 °C

[2] 4-Digit lot number XXXX

Table 3. Absolute Maximum Ratings

Table 4. Package Information

Nominal 5V Supply to GND

VDDCAL, VDDI, VDDQ, VDDBG,

DVDD

-0.3 to 5.5V

Common Mode Inputs Pins

(CMI, CMQ) -0.3 to 5.5V

Input and Output Pins

IIP, IIN, IQP, IQN, OIP, OIN, OQP,

OQN

-0.3 to 5.5V

Digital Pins

SEN, SDI, SCK, SDO, CALCK

SDO min load impedance

-0.3 to 5.5V

1k

Operating Temperature Range -40 to +85 °C

Storage Temperature -65 to +125 °C

Maximum Junction Temperature 125 °C

Thermal Resistance (RTH)

(junction to ground paddle) 10 °C/W

ELECTROSTATIC SENSITIVE DEVICE

OBSERVE HANDLING PRECAUTIONS

Reow Soldering

Peak Temperature

Time at Peak Temperature

260 °C

40 µs

ESD Sensitivity (HBM) 1kV Class 1C

Stresses above those listed under Absolute Maximum Ratings may

cause permanent damage to the device. This is a stress rating only;

functional operation of the device at these or any other conditions

above those indicated in the operational section of this specication

is not implied. Exposure to absolute maximum rating conditions for

extended periods may affect device reliability.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 8

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 5. Pin Descriptions

Pin Number Function Description Interface Schematic

1, 3, 8 - 10,

17, 24, 25, 32 N/C

The pins are not connected internally; however, all data

shown herein was measured with these pins connected to

RF/DC ground externally.

2, 4 VDDQ Quadrature (Q) Channel 5V Supply.

Must be locally decoupled to GND

5 CMQ Quadrature (Q) channel output common mode level

6, 7 OQP, OQN Quadrature (Q) channel positive and negative differential

outputs

11 CALCK Calibration clock input

12, 14, 15 SCLK, SDI, SEN SPI Data clock, data input and enable respectively.

13 SDO SPI Data Output

16 DVDD Digital 5V Supply. Must be locally decoupled to GND.

18, 19 OIN, OIP Inphase (I) channel negative and positive differential

outputs respectively

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 9

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Pin Number Function Description Interface Schematic

20 CMI Inphase (I) channel output common mode level

21, 23 VDDi Inphase (I) Channel 5V Supply. Must be locally decoupled

to GND

22 VDDCAL Calibration 5V Supply. Must be locally decoupled to GND

26, 27 IIP, IIN Inphase (I) channel positive and negative differential

inputs respectively

28 VDDBG Bias 5V Supply. Must be locally decoupled to GND.

29 VBG 1.2V Bandgap output (testing only)

30, 31 IQN, IQP Quadrature (Q) channel negative and positive differential

inputs respectively

Table 5. Pin Descriptions (Continued)

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 10

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Evaluation PCB

The circuit board used in the application should use RF circuit design techniques. Signal lines should have 50

Ohms impedance while the package ground leads and exposed paddle should be connected directly to the

ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and

bottom ground planes. The evaluation circuit board shown is available from Hittite upon request.

Item Contents Part Number

Evaluation PCB Only HMC900LP5E Evaluation PCB 131200-HMC900LP5E

Evaluation Kit

HMC900LP5E Evaluation PCB

USB Interface Board

6’ USB A Male to USB B Female Cable

CD ROM (Contains User Manual, Evaluation PCB Schematic, Evaluation Software)

130521-HMC900LP5E

Table 6. Evaluation Order Information

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 11

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Evaluation Setup

Figure 18. Characterization Setup Block Diagram

Evaluation PCB Schematic

To view Evaluation PCB Schematic please visit www.hittite.com and choose HMC900LP5E from the “Search by

Part Number” pull down menu to view the product splash page.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 12

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

The HMC900LP5E addresses different lter applications such as xed frequency or variable bandwidth implementations

dependent on the part selected (see “HMC900LP5E Ordering Information”) and the control provided to the

HMC900LP5E. These modes provide the user with different lter options depending on the system implementation.

An overview of these trade-offs are shown below.

Table 7. HMC900LP5E Modes of Operation

Function Unprogrammed

HMC900LP5E-00000

Pre-programmed

HMC900LP5E-BBBGL

SPI

Req’d

CALCK

Req’d Comments

Fixed Bandwidth Filter Yes Yes

No No

Default Bandwidth and Gain

setting after Power On Reset

(POR)

Default Bandwidth

and Gain as dened

by register defaults.

(3.5 MHz /0dB gain)

Bandwidth and

Gain as dened by

pre-programming at

factory.

Pre-programmed gain and bandwidth

are dened when ordering the part. See

“HMC900LP5E Ordering Information”.

Typical Corner Frequency Ac-

curacy at Default Bandwidth +/- 20 % +/- 2.5 % Accuracy is with respect to bandwidth

after POR.

Variable Bandwidth Filter Yes Yes

Yes No

Full control over HMC900LP5E requires

access via the digital serial port (SPI).

Default Bandwidth and Gain

setting after Power On Reset

(POR)

Default Bandwidth

and Gain as dened

by register defaults.

(3.5 MHz /0dB gain)

Bandwidth and

Gain as dened by

pre-programming at

factory.

Pre-programmed gain and bandwidth

are dened when ordering the part. See

“HMC900LP5E Ordering Information”.

Typical Corner Frequency Ac-

curacy at Default Bandwidth +/- 20 % +/- 2.5 % Accuracy is with respect to bandwidth

after POR.

Typical Corner Frequency

Accuracy at all other Band-

widths

+/- 20 % +/- 5.0 %

Accuracy is with respect to the desired

bandwidth.

See “Filter Bandwidth Setting” for informa-

tion regarding changing the bandwidth

after when calibration is not possible.

Variable Bandwidth Filter

(with ability to execute User

Calibration to calibrate lter

bandwidth)

Yes Yes

Full control over HMC900LP5E requires

access via the digital serial port (SPI).

Filter calibration requires valid calibration

clock (via CALCK pin). See “RC Calibra-

tion Circuit”

Default Bandwidth and Gain

setting after Power On Reset

(POR)

Default Bandwidth

and Gain as dened

by register defaults.

(3.5 MHz /0dB gain)

Bandwidth and

Gain as dened by

pre-programming at

factory.

Pre-programmed gain and bandwidth

are dened when ordering the part. See

“HMC900LP5E Ordering Information”.

Typical Corner Frequency

Accuracy after POR (before

User Calibration)

+/- 20 % +/- 2.5 % Accuracy is with respect to bandwidth

after POR.

Typical Corner Frequency Ac-

curacy after User Calibration

at calibrated bandwidth

+/- 2.5 % +/- 2.5 %

Accuracy is with respect to calibrated

bandwidth.

User Calibration requires access to the

HMC900LP5E via the digital serial port

(SPI) and requires a valid calibration clock

(via CALCK pin).

Typical Corner Frequency Ac-

curacy after User Calibration

at non calibrated bandwidths

+/- 5.0 % +/- 5.0 %

Accuracy is with respect to the desired

bandwidth.

User Calibration requires access to the

HMC900LP5E via the digital serial port

(SPI) and requires a valid calibration clock

(via pin CALCK).

See “Filter Bandwidth Setting” for informa-

tion regarding changing the bandwidth

after calibration when further calibration is

not possible.

HMC900LP5E Usage Information

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 13

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

HMC900LP5E Application Information

The HMC900LP5E provides an attractive alternative to other discrete lter solutions due to it’s unmatched exibility in

supporting a wide range of bandwidths in today’s complex multi-carrier systems and multi-standard systems.

Typical architectures supporting multiple bandwidths have required either large board real estate or compromised

lter selection which come at the expense of price or performance. The HMC900LP5E overcomes this limitation by

allowing the system designer to optimize the bandwidth for the required signal.

The HMC900LP5E overcomes the matching problem that discrete lters present with respect to baseband signal

processing. The matched dual lter paths provide excellent gain and phase balance between the two channels

eliminating the image problem which results from poor matching.

The HMC900LP5E provides selectable gain and a exible output driver further increase system integration and

reduce board area.

Figure 19. Typical Receive Path Block Diagram showing HMC900LP5E

Figure 20. Typical Transmit Path Block Diagram

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 14

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

HMC900LP5E Ordering Information

The HMC900LP5E is available as product that is either un-programmed or pre-programmed. Programming is available

to a variety of lter bandwidths (dened in this context as the 3dB bandwidth).

Other options available for pre-programmed product include the single path gain and bias state as described below.

Gain and bias settings are described in Reg 02h.

When placing an order for the HMC900LP5E please observe the following guidelines.

1. To order the un-programmed standard part please place order using the part number HMC900LP5E-00000.

2. To order a pre-programmed HMC900LP5E please determine the part number as described below and then

contact Hittite Sales at sales@hittite.com or call (978) 250-3343.

2.1 Minimum quantity order for the pre-programmed HMC900LP5E-BBBGL is 500 pieces.

3. Pre-Programmed part number description: HMC900LP5E-BBBGL.

3.1 ‘BBB’ represents a three digit number from the following table that represents the desired bandwidth

setting (3 dB bandwidth) from 3.5 MHz to 50 MHz (for example BBB = 035 species a 3.5 MHz corner

frequency).

3.2 ‘G’ represents the gain setting of either 0 dB (G = 0) or 10 dB (G = 1).

3.3 ‘L’ represents the linearity setting of either standard (L = 0) or high linearity (L = 1). Note that the high

linearity setting is recommended only for bandwidth settings above 30 MHz.[1]

For example, to order the HMC900LP5E pre-programmed for 50 MHz 3 dB frequency, 10 dB gain, and standard

linearity setting please specify part number HMC900LP5E-50010.

BBB frequency for custom part (actual frequency is BBB x 0.1 MHz)

035 048 066 088 121 163 218 292 400

036 049 068 091 124 167 224 300 401

037 050 069 093 128 171 229 307 411

038 052 070 095 131 175 235 315 422

039 053 071 098 134 179 240 322 432

040 054 073 100 137 180 246 330 443

041 056 075 102 140 184 253 338 454

042 057 076 105 141 188 259 347 465

043 058 078 108 144 193 265 355 476

044 060 080 110 148 198 272 364 488

045 061 082 113 151 203 278 373 500

046 063 084 116 155 208 280 382

047 064 086 119 159 213 285 392

[1] The Output IP2 and Output IP3 for the two linearity settings are shown in Figure 8 and Figure 9. High linearity setting improves linearity for

bandwidths greater than 30 MHz at the cost of increased current consumption (additional 25 mA).

Table 8. Custom Part Frequency Options

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 15

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Theory of Operation

The HMC900LP5E consists of the following functional blocks

1. Input Gain Stage

2. 6th Order LPF

3. Output Driver

4. RC Calibration Circuit

5. Bias Circuit

6. One Time Programmable Memory

7. Serial Port interface

8. Built in Self Test (RC-BIST)

Input Gain Stage

The HMC900LP5E input stage consists of a programmable 0 or 10 dB gain stage which in turn drives the 6th order

LPF. A block diagram showing input impedance of the I channel is presented below, Q channel is similar.

Figure 21. Input Stage Block Diagram

6th Order Low Pass Filter (LPF)

The LPF allows for coarse bandwidth tuning by varying the capacitive elements in the lter, while the ne bandwidth

tuning is accomplished by varying the resistors. Note that all opamps in the LPF are class AB for minimum power

consumption in the lter while maintaining excellent distortion characteristics even in large signal swing conditions.

The attenuation due to the LPF can be calculated for any frequency, f, from the standard Butterworth transfer function

for a 6th order lter. Specically the attenuation of the lter, in dB, can be calculated as:

attenuation = 10*log10(1+(f/fc)^(2*6))

where fc is the 3 dB bandwidth or corner frequency for the lter.

Note that for a 6th order Butterworth lter the 1 dB bandwidth is 90% of fc, and the 0.3 dB bandwidth is 80% of fc.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 16

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Filter Bandwidth Setting

The 3 dB bandwidth of the HMC900LP5E is programmable anywhere within the range from 3.5 to 50 MHz. This

is accomplished via a two step process which involves 1) running calibration, and 2) programming the appropriate

coarse and ne bandwidth codes. Once the settings for a given device are found, they can be stored permanently in

the non volatile memory (See “One Time Programmable Memory (OTP)”.)

To program the bandwidth of the HMC900LP5E to a desired bandwidth, fwanted, the procedure is as follows:

1. Run a calibration routine.

Run a lter calibration cycle to determine the particular calibration code for the device under test (See “RC

Calibration Circuit”.) Once complete, the actual calibration measurement must be read from the SPI (See Reg

09h.)

2. Calculate the desired coarse bandwidth and ne bandwidth codes.

a. From the calibration result we dene a coarse tune factor, ctune as:

ctune=Cal_count/10370000

b. Normalize the desired frequency

fBW_norm_coarse = fwanted * ctune

c. Lookup the coarse tune code based on fBW_norm_coarse from Table 9.

Table 9. Normalized Bandwidth Look up Table

coarse_bandwidth_code[3:0]

fBW_norm_coarse

min

(MHz)

typ

(MHz)

max

(MHz)

0000 2.764 3.500 4.235

0001 3.948 5.000 6.050

0010 5.527 7.000 8.470

0011 7.896 10.000 12.100

0100 11.055 14.000 16.940

0101 15.792 20.000 24.200

0110 22.109 28.000 33.880

0111 27.637 35.000 42.351

1000 39.480 50.000 60.500

d. Calculate the ne tuning factor, ne_tune_ratio, for bandwidth based on the typical value of the coarse

bandwidth center frequency, fBW_norm_coarse_typ

ne_tune_ratio = fBW_norm_coarse / fBW_norm_coarse_typ

e. Lookup the ne tune code based on ne_tune_ratio from Table 10:

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 17

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 10. Calibration Code Look up Table

ne_bandwidth_code [3:0]

ne_tune_ratio

min

(MHz/MHz)

typ

(MHz/MHz)

max

(MHz/MHz)

0000 0.790 0.803 0.818

0001 0.818 0.832 0.846

0010 0.846 0.862 0.878

0011 0.878 0.893 0.909

0100 0.909 0.926 0.943

0101 0.943 0.959 0.976

0110 0.976 0.994 1.012

0111 1.012 1.030 1.048

1000 10.48 1.068 1.087

1001 1.087 1.107 1.128

1010 1.128 1.148 1.169

1011 1.169 1.189 1.210

3. Program the SPI for the given device with the coarse and ne bandwidth code, and instruct the device to use

the provided instructions.

a. Write coarse_bandwidth_code[3:0] to Reg 02h bits [9:6]

b. Write ne_bandwidth_code[3:0] to Reg 03h bits [3:0]

c. Instruct HMC900LP5E to use provided codes by setting Reg 01h bit 4.

Filter Bandwidth Setting After Calibration

After the initial lter calibration is completed as above the lter bandwidth can be changed to an arbitrary bandwidth

by recalculating coarse_bandwidth_code[3:0] and ne_bandwidth_code[3:0] from the previously determined ctune.

This results in the same coarse_bandwidth_code[3:0] and ne_bandwidth_code[3:0] as if the HMC900LP5E was

recalibrated as described above.

If ctune is unknown but the current desired frequency is known then the value of ctune needs to be estimated based on

the values of coarse_bandwidth_code[3:0] and ne_bandwidth_code[3:0] and the corresponding nominal frequencies

in Table 9 and Table 10.

For example, if the 3 dB bandwidth for the HMC900LP5E was factory pre-programmed to a customer dened

requirement of 34 MHz and coarse_bandwidth_code[3:0] and ne_bandwidth_code[3:0] are “0111” and “1001”

respectively (as determined from Reg 0Ah for a pre-programmed part or from Reg 02h for a non programmed part)

then ctune can be estimated as follows:

1. Lookup the nominal coarse bandwidth and ne bandwidth frequencies.

a. From Table 9 the nominal coarse frequency is 35.0 MHz

b. From Table 10 the nominal ne normalized frequency is 1.107 MHz/ MHz or simply 1.107

2. Estimate ctune as:

ctune=(35 MHz * 1.107 )/ 34 MHz = 1.13956

This value of ctune can now be used to calculate any arbritary lter frequency as described above.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 18

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Output Driver

The HMC900LP5E output driver consists of a differential class AB driver which is designed to drive typical ADC loads

directly or can drive up to 200 in parallel with 50 pF to AC ground per differential output. Note that the output common

mode of the driver is controlled directly via the CMI/CMQ pin and can be set as per “Table 1. Electrical Specications”.

Also note, that driver loading does not impact lter transfer responses. The output common mode of the driver is

controlled directly via the CMI/CMQ pin and can be set as per the “Table 1. Electrical Specications”.

A block diagram showing output connections is presented below.

Figure 22. Output Driver Block Diagram

RC Calibration Circuit

The RC Calibration block uses a known user supplied clock to measure an on chip RC time constant. This measurement

is representative of the uncorrected corner frequency error for a given bandwidth for the LPF.

Calibration is normally done at room temperature Refer to “Table 1. Electrical Specications” for further details on the

variation of the 3dB cutoff point with temperature.

With this information, the HMC900LP5E can correctly ne tune the LPF by adjusting the resistors in the LPF to center

the corner frequency to the desired bandwidth.

The calibration for the HMC900LP5E proceeds as follows:

1. the clock used for calibration is programmed between 20 MHz and 100 MHz via Reg 05h. Also note that for

clocks between 20 MHz and 40 MHz the doubler must be enabled via Reg 01h.

2. the RC calibration circuit is enabled via Reg 01h.

3. a calibration cycle is initialized by writing to Reg 04h.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 19

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

When complete, the calibration value can be retrieved from Reg 08h and, if desired, the calibration results can be

overridden via Reg 03h.

Bias Circuit

A band gap reference circuit generates the reference currents used by the different sections. The bias circuit is

enabled or disabled as required with the I or Q channel as appropriate.

One Time Programmable Memory (OTP)

The HMC900LP5E features one time programmable memory which can be programmed by the end user or ordered

from the factory precalibrated.

The OTP memory is programmed via the standard 4 wire serial port (SPI) as follows:

1. enable OTP write mode (see Reg 0Bh bit 0 enables OTP programming).

2. read the status of the OTP active ag (see Reg 08h, bit 5 is the OTP active ag). The Write Pulse Status (OTP

active ag) must be 0 to allow the OTP to be programmed.

3. write the OTP bit address to be set (Reg 0Ch). This address is a 4 bit number representing the address of the

bit to be programmed. Note that when programming a bit we change its state from 0 to 1 and this operation

cannot be reversed. OTP bit addresses can be found in Reg 08h.

4. start the OTP Write operation. Write any data to the OTP strobe register (Reg 0Dh).

5. read the status of the OTP active ag (Reg 08h, bit 5 is the OTP active ag). If bit 5 is set then the Write pulse

is still high. Repeat until bit 5 is 0 which indicates that the write pulse is nished.

6. Repeat steps 3 to 5 to program the remaining desired bits.

Note that bit 13 OTP_prg_ag must be set by the user to use OTP values.

7. When completed, disable OTP write mode (Reg 0Bh).

Serial Port Interface

The HMC900LP5E features a four wire serial port for simple communication with the host controller. Typical serial

port operation can be run with SCK at speeds up to 30MHz.

The details of SPI access for the HMC900LP5E is provided in the following sections. Note that the READ operation

below is always preceded by a WRITE operation to Reg 0h to dene the register to be queried. Also note that every

READ cycle is also a WRITE cycle in that data sent to the SPI while reading the data will also be stored by the

HMC900LP5E when SEN goes high. If this is not desired then it is suggested to write to Reg 0h during the READ

operation as the status of the device will be unaffected.

Power on Reset and Soft Reset

The HMC900LP5E has a built in Power On Reset (POR) and also a serial port accessible Soft Reset (SR). POR is

accomplished when power is cycled for the HMC900LP5E while SR is accomplished via the SPI by writing 20h to

Reg 0h followed by writing 00h to Reg 0h. All chip registers will be reset to default states approximately 250us after

power up.

Serial Port WRITE Operation

The host changes the data on the falling edge of SCK and the HMC900LP5E reads the data on the rising edge.

A typical WRITE cycle is shown in Figure 23. It is 32 clock cycles long.

1. The host both asserts SEN (active low Serial Port Enable) and places the MSB of the data on SDI followed

by a rising edge on SCLK.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 20

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

2. HMC900LP5E reads SDI (the MSB) on the 1st rising edge of SCK after SEN.

3. HMC900LP5E registers the data bits, D23:D0, in the next 23 rising edges of SCLK (total of 24 data bits).

4. Host places the 5 register address bits, A4:A0, on the next 5 falling edges of SCLK (MSB to LSB) while the

HMC900LP5E reads the address bits on the corresponding rising edge of SCK.

5. Host places the 3 chip address bits, CA2:CA0=[101], on the next 3 falling edges of SCK (MSB to LSB). Note

the HMC900LP5E chip address is xed as “5d” or “101b”.

6. SEN goes from low to high after the 32th rising edge of SCK. This completes the WRITE cycle.

7. HMC900LP5E also exports data back on the SDO line. For details see the section on READ operation.

Serial Port READ Operation

The SPI can read from the internal registers in the chip. The data is available on SDO line. This line itself is tri-stated

when the device is not being addressed. However when the device is active and has been addressed by the SPI

master, the HMC900LP5E controls the SDO line and exports data on this line during the next SPI cycle.

HMC900LP5E changes the data to the host on the rising edge of SCLK and the host reads the data from HMC900LP5E

on the falling edge.

A typical READ cycle is shown in Figure 23. Read cycle is 32 clock cycles long. To specically read a register, the

address of that register must be written to dedicated Reg 0h. This requires two full cycles, one to write the

required address, and a 2nd to retrieve the data. A read cycle can then be initiated as follows;

1. The host asserts SEN (active low Serial Port Enable) followed by a rising edge SCLK.

2. HMC900LP5E reads SDI (the MSB) on the 1st rising edge of SCK after SEN.

3. HMC900LP5E registers the data bits in the next 23 rising edges of SCLK (total of 24 data bits). The LSBs of

the data bits represent the address of the register that is intended to be read.

4. Host places the 5 register address bits on the next 5 falling edges of SCLK (MSB to LSB) while the

HMC900LP5E reads the address bits on the corresponding rising edge of SCK. For a read operation this

is “00000”.

5. Host places the 3 chip address bits <101> on the next 3 falling edges of SCK (MSB to LSB). Note the

HMC900LP5E chip address is xed as “5d” or “101b”.

6. SEN goes from low to high after the 32th rising edge of SCK. This completes the rst portion of the READ

cycle.

7. The host asserts SEN (active low Serial Port Enable) followed by a rising edge SCLK.

8. HMC900LP5E places the 24 data bits, 5 address bits, and 3 chip id bits, on the SDO, on each rising edge of

the SCK, commencing with the rst rising edge beginning with MSB.

9. The host deasserts SEN (i.e. sets SEN high) after reading the 32 bits from the SDO output. The 32 bits

consists of 24 data bits, 5 address bits, and the 3 chip id bits.

Note that the data sent to the SPI during this portion of the READ operation is stored in the SPI when SEN is

deasserted. This can potentially change the state of the HMC900LP5E. If this is undesired it is recommended

that during the second phase of the READ operation that Reg 0h is addressed with either the same address

or the address of another register to be read during the next cycle.

10. This completes the READ cycle.

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 21

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Serial Port Bus Operation with Multiple Devices

The SPI bus architecture supports multiple HMC devices on the same SPI bus. Each HMC900LP5E on the bus

requires a dedicated SEN line to enable the appropriate device.

The SDO pin is normally driven by the HMC900LP5E during and after an SPI read/write which is addressed directly

to the HMC900LP5E (chip address = 5d or ‘101’b). A write to the HMC900LP5E where chip address is set to any

value other than 5d or ‘101’b is required in order to ensure that the SDO pin remains tri-stated after accessing the

HMC900LP5E. Such a write will not result in any change in the HMC900LP5E conguration because of the incorrect

chip address.

Figure 23. SPI Timing Diagram

Table 11. Main SPI Timing Characteristics

DVDD = 5V ±5%, GND = 0V

Parameter Conditions Min Typ Max Units

t1SDI to SCK Setup Time 8 nsec

t2SDI to SCK Hold Time 8 nsec

t3SCK High Duration [a] 10 nsec

t4SCK Low Duration 10 nsec

t5SEN Low Duration 20 nsec

t6SEN High Duration 20 nsec

t7SCK to SEN [b] 8 nsec

t8SCK to SDO Out[c] 8 nsec

a. The SPI is relative insensitive to the duty cycle of SCK.

b. SEN must rise after the 32nd falling edge of SCK but before the next rising SCK edge. If SCK is shared amongst several devices this

timing must be respected.

c. Typical load to SDO 10pF, max 20pF

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 22

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Built In Self Test (RC-BIST)

The HMC900LP5E RC Calibration state machine features built in self test (RC-BIST) to facilitate improved device

testing.

The RC-BIST can be exercised as follows:

1. apply reset to the chip via a power cycle (hard reset) or via the SPI (soft reset). Soft reset is accomplished by

writing 20h to Reg 0h followed by writing 00h to Reg 0h.

2. setup the RCCAL input parameters if desired. Note that the RC-BIST will work with the default settings from

power up however test coverage will improve if the following SPI registers are also accessed:

a. program the RC clock period (Reg 05h).

b. program the measurement adjustment setting (Reg 06h).

c. program the threshold adjustment settings.

3. enable BIST mode (Reg 0Eh).

4. start the BIST by writing any data to the BIST strobe register (Reg 04h). Note that the BIST will take 2^18 ~

260k clock cycles to complete.

5. read the result of the BIST test. Read the value in the BIST Out register (Reg 0F). Bit 16 is the busy ag and

will be set when the BIST is still running. When this bit is reset then the BIST output value in bits 15:0 are

valid.

Note that the value of the BIST output must be compared to the expected result depending on values

programmed into the registers in step 2.

The BIST procedure can be repeated as desired to ensure adequate test coverage for the RC Calibration engine. The

suggested register settings to maximize test coverage with BIST is provided below.

Table 12. Test Conditions

Reg 05h[14:0]=65, Reg 06h[8:0]=255, Reg10h[4:0] to eg1Ah[4:0]=0d or 0h Reg 0Fh[15:0]=36092, Reg 09h[23:0]=14942167

Reg 05h[14:0]=32702, Reg 06h[8:0]=36, Reg10h[4:0] to Reg1Ah[4:0]=31d or 1Fh Reg 0Fh[15:0]=55027, Reg 09h[23:0]=14143649

Reg 05h[14:0]=10922, Reg 06h[8:0]=170, Reg10h[4:0] to Reg1Ah[4:0]=10d or Ah Reg 0Fh[15:0]=28618, Reg 09h[23:0]=8907563

Reg 05h[14:0]=21845, Reg06h[8:0]=853, Reg10h[4:0] to Reg1Ah[4:0]=21d or 15h Reg oFg[15:0]=16368, Reg 09h[23:0]=3396981

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 23

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 13. Reg 01h - Enable

Bit Name Width Default Description

[0] OTP_DontUse 1 0 Default use stored OTP values (only if OTP is programmed)

[1] cal_enable 1 0 Enable RC Calibration circuit

[2] lter_I_enable 1 1 Enable I channel gain stage, lter, and driver

[3] lter_Q_enable 1 1 Enable Q channel gain stage, lter, and driver

[4] force_cal_code 1 0 Force calibration setting to use SPI values (Reg 03h - Calibration)

[5] doubler_enable 1 0

0-- Doubler Disabled. RC Calibration clock

40 MHz<RC calibration clock<80 MHz

1 -- Doubler Enabled. RC Calibration clock

20 MHz<RC calibration clock<40 MHz

Note: calibration clock duty cycle must be within 50% +/- 10%

[9:6] reserved 4 0000

[23:10] unused

Table 14. Reg 02h - Settings

Bit Name Width Default Description

[1:0] opamp_bias[1:0] 2 01

Opamp bias setting.

00 -- min bias

11 -- max bias

opamp_bias[1:0]=01 standard bias (characterized value)

opamp_bias[1:0]=10 high linearity bias

[3:2] drvr_bias[1:0] 2 10

Driver bias setting.

00 -- min bias

11 -- max bias

drvr_bias[1:0]=10 standard bias (characterized value)

[4] gain_10dB 1 0

VGA gain setting.

0: 0dB VGA gain

1: 10dB VGA gain

[5] bypass_lter 1 0

Filter bypass setting.

0: Filter bypass disabled

1: Filter bypass enabled

[9:6] coarse_bandwidth_code[3:0] 4 0000

Sets lter coarse tuning range

0000 - 3.5 MHz

0001 - 5 MHz

0010 - 7 MHz

0011 - 10 MHz

0100 -14 MHz

0101 - 20 MHz

0110 - 28 MHz

0111 - 35 MHz

1000 - 50 MHz

[10] reserved 1 0

[23:11] unused

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 24

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 15. Reg 03h - Calibration

Bit Name Width Default Description

[3:0] ne_bandwidth_code[3:0] 4 0000

ne bandwidth setting override bits

(register 01 bit 4, force_cal_code, must be set).

0000 - Minimum frequency

0001

0010

0011

0100

0101

0110

0111

1000

1001

1010

1011 - Maximum frequency

[23:4] unused

Table 16. Reg 04h - Calibration/RC-BIST Strobe

Calibration strobe register is used only to initialize a calibration cycle. Writing any value to this register serves to

request a new calibration cycle.

Note that this register is also used to start the Built In Self Test (RC-BIST) mode and this is used to test the

fault coverage of the RC calibration engine.

Bit Name Width Default Description

[23:0] Request calibration 1 0 Writing to any bit in this register starts a calibration cycle.

Table 17. Reg 05h - Clk Period

Bit Name Width Default Description

[14:0] clock_period[14:0] 15 0000h

Sets the clock period for the RC calibration circuit. Clock period entered is in

pico seconds.

i.e. 1/40 MHz clock =25000ps= 110000110101000b=61A8h

[23:15] unused

Table 18. Reg 06h - Measure Adjust

Correction value used to adjust RC Calibration result. Value is in 1.024ns increments.

Bit Name Width Default Description

[8:0] meas_adj[8:0] 9 000h

Correction value to ADD to counter output before counter is decoded for

calibration setting.

Number is in 2’s complement format.

Note this applies to all settings universally.

[23:9] unused

Table 19. Reg 07h Unused

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

3 - 25

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 20. Reg 08h - Calibration Status (read only)

Bit Name Width Default Description

[3:0] ne_bandwidth_code[3:0] 4 0000 ne_bandwidth_setting (must run a calibration cycle to get valid data)

Valid states are 0000 to 1011 (see Table 3. Reg 03h - Calibration)

[4] cal_busy 1 Calibration active ag

[5] OPT _write_busy 1 OTP write active ag

[23:6] unused

Table 21. Reg 09h - Calibration Count (read-only)

Bit Name Width Default Description

[23:0] count_read[23:0] 24 Output of calibration counter in pico seconds (unadjusted)

Table 22. Reg 0Ah - OTP Values (read-only)

Bit Name Width Default Description

[3:0] OTP_ne_bandwidth_

code[3:0] 4Non volatile ne_bandwidth_code[3:0]. Denition is same as per “Reg 03h -

Calibration”

[6:4] OTP_course_bandwidth_

code[2:0] 3

Non volatile version of SPI values found in “Reg 02h - Settings”

[7] OTP_Gain_10dB 1

[8] OTP_bypass_lter 1

[10:9] OTP_opamp_bias[1:0] 2

[12:11] OTP_drvr_bias[1:0] 2

[13] OTP_prg_ag 1

This ag must be set if the OTP values are to be used and must be set by the

user.

If not set, this ag overrides bit 0 of Reg 01h.

[14] OTP_Coarse_Bandwidth[3] Non volatile version of SPI values found in Reg 02h - Settings

[15] reserved reserved

[23:16] unused

Table 23. Reg 0Bh - OTP Write Enable

Bit Name Width Default Description

[0] EFR_Write_enable 1 0 Enables OTP Programming

[23:1] unused

Table 24. Reg 0Ch - OTP Write

OTP address register is used in programming of OTP.

Bit Name Width Default Description

[3:0] OTP Address 4 0 Address of OTP bit to be set

[23:4] unused

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com 3 - 26

IF / BASEBAND SIGNAL PROCESSING

HMC900LP5E

v04.0811 50 MHz DUAL PROGRAMMABLE

LOW PASS FILTER with DRIVER

Table 25. Reg 0Dh - OTP Write Pulse

OTP strobe register is used in programming of OTP.

Bit Name Width Default Description

[23:0] reserved 1 0 reserved

Table 26. Reg 0Eh - RC-BIST Enable

Bit Name Width Default Description

[0] enable_RCBIST_mode 1 0 RC-BIST mode enable

[23:1] unused

Table 27. Reg 0Fh - RC-BIST Out

Bit Name Width Default Description

[15:0] crc_BIST[15:0] 16 0 RC-BIST CRC check result

[16] crc_RC-BIST_busy_ag 1 0 RC-BIST busy ag. Indicates that BIST cycle is not completed and data crc_

BIST[15:0] is invalid

[23:17] unused

Table 28. Reg 10h to Reg1A - Window Threshold

OTP strobe register is used in programming of OTP.

Bit Name Width Default Description

[23:0] reserved reserved

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Analog Devices Inc.:

HMC900LP5E HMC900LP5ETR 131200-HMC900LP5E 130521-HMC900LP5E