12 - 1
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
HMC625LP5 / 625LP5E
v09.0410
Functional Diagram
Electrical Speci cations, TA = +25° C, 50 Ohm System, Vdd= +5V, Vs= +5V
The HMC625LP5(E) is ideal for:
• Cellular/3G Infrastructure
• WiBro / WiMAX / 4G
• Microwave Radio & VSAT
• Test Equipment and Sensors
• IF & RF Applications
-13.5 to +18 Gain Control in 0.5 dB Steps
Power-up State Selection
High Output IP3: +33 dBm
TTL/CMOS Compatible
Serial, Parallel, or latched Parallel Control
±0.25 dB Typical Gain Step Error
Single +5V Supply
32 Lead 5x5mm SMT Package: 25mm2
The HMC625LP5(E) is a digitally controlled variable
gain ampli er which operates from DC to 6 GHz, and
can be programmed to provide anywhere from 13.5
dB attenuation, to 18 dB of gain, in 0.5 dB steps. The
HMC625LP5(E) delivers noise gure of 6 dB in its
maximum gain state, with output IP3 of up to +33 dBm
in any state. The dual mode control interface is CMOS/
TTL compatible, and accepts either a three wire serial
input or a 6 bit parallel word. The HMC625LP5(E) also
features a user selectable power up state and a serial
output port for cascading other Hittite serial controlled
components. The HMC625LP5(E) is housed in a
RoHS compliant 5x5 mm QFN leadless package, and
requires no external matching components.
Parameter Frequency Min. Typ. Max. Units
Gain (Maximum Gain State) DC - 3.0 GHz
3.0 - 6.0 GHz
13
5
18
13
dB
dB
Gain Control Range 31.5 dB
Input Return Loss DC - 6.0 GHz 15 dB
Output Return Loss DC - 6.0 GHz 12 dB
Gain Accuracy: (Referenced to Maximum Gain State)
All Gain States
DC - 0.8 GHz
0.8 - 6.0 GHz
± (0.10 + 5% of Gain Setting) Max.
± (0.30 + 3% of Gain Setting) Max.
dB
dB
Output Power for 1dB Compression DC - 3.0 GHz
3.0 - 6.0 GHz
16
13
19
16 dBm
Output Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone) DC - 6.0 GHz 33 dBm
Noise Figure DC - 6.0 GHz 6 dB
Supply Current (Idd) DC - 6.0 GHz 60 88 100 mA
Typical Applications Features
General Description
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
12 - 2
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
Input Return Loss [1]
(Only Major States are Shown)
Normalized Attenuation [2]
(Only Major States are Shown)
-35
-30
-25
-20
-15
-10
-5
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
-40
-35
-30
-25
-20
-15
-10
-5
0
0123456
RETURN LOSS (dB)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
5
10
15
20
25
0123456
+25 C
+85 C
-40 C
GAIN (dB)
FREQUENCY (GHz)
[2]
[1]
Maximum Gain vs. Frequency
Input Return Loss [2]
(Only Major States are Shown)
-40
-35
-30
-25
-20
-15
-10
-5
0
0123456
RETURN LOSS (dB)
FREQUENCY (GHz)
[1] Tested with broadband bias tee on RF ports and C1 = 10,000pF
[2] C1, C6 and C8 = 100pF, L1 = 24nH
Output Return Loss [1]
(Only Major States are Shown)
-40
-35
-30
-25
-20
-15
-10
-5
0
0123456
RETURN LOSS (dB)
FREQUENCY (GHz)
Output Return Loss [2]
(Only Major States are Shown)
-40
-35
-30
-25
-20
-15
-10
-5
0
0123456
RETURN LOSS (dB)
FREQUENCY (GHz)
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
12 - 3
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
Step Error vs. Frequency [2]
(Only Major States are Shown)
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0123456
STEP ERROR (dB)
FREQUENCY (GHz)
Bit Error vs. Frequency [2]
(Only Major States are Shown) Bit Error vs. Attenuation State [2]
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
0123456
BIT ERROR (dB)
FREQUENCY (GHz)
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0 4 8 12 16 20 24 28 32
BIT ERROR (dB)
ATTENUATION STATE (dB)
100MHz, 3GHz, 4GHz
500MHz, 1GHz, 2GHz
Normal Relative Phase vs. Frequency [2]
(Only Major States are Shown)
-40
-20
0
20
40
60
80
0123456
RELATIVE PHASE (deg)
FREQUENCY (GHz)
31.5 dB
16 dB
8 dB
0.5 - 4 dB
[1] Tested with broadband bias tee on RF ports and C1 = 10,000pF
[2] C1, C6 and C8 = 100pF, L1 = 24nF
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
12 - 4
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
Serial Control Interface
Parallel Mode (Direct Parallel Mode & Latched Parallel Mode)
The HMC625LP5(E) contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). It is activated when P/S
is kept high. The 6-bit serial word must be loaded MSB rst. The positive-edge sensitive CLK and LE requires
clean transitions. If mechanical switches were used, sufficient debouncing should be provided. When LE is high,
6-bit data in the serial input register is transferred to the attenuator. When LE is high CLK is masked to prevent data
transition during output loading.
When P/S is low, 3-wire SPI interface inputs (SERIN, CLK, LE) are disabled and serial input register is loaded
asynchronously with parallel digital inputs (D0-D5). When LE is high, 6-bit parallel data is transferred to the attenuator.
For all modes of operations, the DVGA state will stay constant while LE is kept low.
Note: The parallel mode is enabled when P/S is set to low.
Direct Parallel Mode - The attenuation state is changed by the Control Voltage Inputs directly. The LE (Latch Enable)
must be at a logic high to control the attenuator in this manner.
Latched Parallel Mode - The attenuation state is selected using the Control Voltage Inputs and set while the LE is in
the Low state. The attenuator will not change state while LE is Low. Once all Control Voltage Inputs are at the desired
states the LE is pulsed. See timing diagram above for reference.
Timing Diagram (Latched Parallel Mode)
Parameter Typ.
Min. serial period, tSCK 100 ns
Control set-up time, tCS 20 ns
Control hold-time, tCH 20 ns
LE setup-time, tLN 10 ns
Min. LE pulse width, tLEW 10 ns
Min LE pulse spacing, tLES 630 ns
Serial clock hold-time from LE, tCKN 10 ns
Hold Time tPH 0 ns
Latch Enable Minimum width, tLEN 10 ns
Setup Time, tPS 2 ns
12 - 5
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
Absolute Maximum Ratings
RF Input Power [1] 11.5 dBm (T = 85 °C)
Digital Inputs (Reset, Shift Clock,
Latch Enable & Serial Input) -0.5 to Vdd +0.5V
Bias Voltage (Vdd) 5.6V
Collector Bias Voltage (Vcc) 5.5V
Channel Temperature 150 °C
Continuous Pdiss (T = 85 °C)
(derate 15.1 mW/°C above 85 °C) [1] 0.98 W
Thermal Resistance 66.3 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
[1] At max gain settling
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Bias Voltage
Vdd (V) Idd (Typ.) (mA)
5V 2
Vs (V) Is (Typ.) (mA)
5V 86
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
PUP Truth Table
Power-Up States
Control Voltage Input Gain
Relative to
Maximum
Gain
D5 D4 D3 D2 D1 D0
High High High High High High 0 dB
High High High High High Low -0.5 dB
High High High High Low High -1 dB
High High High Low High High -2 dB
High High Low High High High -4 dB
High Low High High High High -8 dB
Low High High High High High -16 dB
Low Low Low Low Low Low -31.5 dB
Any combination of the above states will provide a reduction in
gain approximately equal to the sum of the bits selected.
Truth Table
Control Voltage Table
State Vdd = +3V Vdd = +5V
Low 0 to 0.5V @ <1 μA 0 to 0.8V @ <1 μA
High 2 to 3V @ <1 μA 2 to 5V @ <1 μA
If LE is set to logic LOW at power-up, the logic state of
PUP1 and PUP2 determines the power-up state of the
part per PUP truth table. If the LE is set to logic HIGH
at power-up, the logic state of D0-D5 determines the
power-up state of the part per truth table. The DVGA
latches in the desired power-up state approximately
200 ms after power-up.
Power-On Sequence
The ideal power-up sequence is: GND, Vdd, digital
inputs, RF inputs. The relative order of the digital
inputs are not important as long as they are powered
after Vdd / GND
LE PUP1 PUP2 Gain Relative to Maximum
Gain
000 -31.5
010 -24
001 -16
011 Insertion Loss
1 X X 0 to -31.5 dB
Note: The logic state of D0 - D5 determines the
power-up state per truth table shown below when LE
is high at power-up.
12 - 6
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
Outline Drawing
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS]
3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE
SOLDERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED LAND PATTERN.
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC625LP5 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H625
XXXX
HMC625LP5E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H625
XXXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
Pin Number Function Description Interface Schematic
1AMPIN
This pin is DC coupled.
An off chip DC blocking capacitor is required.
29 AMPOUT RF output and DC bias (Vcc) for
the output stage of the ampli er.
2, 3, 13,
28, 30 - 32 GND These pins and package bottom
must be connected to RF/DC ground.
4, 12 ATTIN,
ATTOUT
These pins are DC coupled and matched to 50 Ohms.
Blocking capacitors are required. Select value based
on lowest frequency of operation.
5 - 10 ACG1 - ACG6 External capacitors to ground is required. Select value for lowest
frequency of operation. Place capacitor as close to pins as possible.
Pin Descriptions
12 - 7
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
Application Circuit
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
Pin Number Function Description Interface Schematic
11 N/C
The pins are not connected internally; however, all data shown
herein was measured with these pins connected to RF/DC ground
externally.
14 SEROUT Serial input data delayed by 6 clock cycles.
15, 16 PUP2, PUP1
18 - 23 D5, D4, D3,
D2, D1, D0
24 P/S
25 CLK
26 SERIN
27 LE
17 Vdd Supply Voltage
Pin Descriptions
12 - 8
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
12
HMC625LP5 / 625LP5E
v09.0410
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
Evaluation PCB
The circuit board used in the application should
use RF circuit design techniques. Signal lines
should have 50 Ohm 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.
List of Materials for Evaluation PCB 116960 [1]
Item Description
J1 - J2 PCB Mount SMA Connector
J3 18 Pin DC Connector
J4 - J6 DC Pin
C1 - C9 100 pF Capacitor, 0402 Pkg.
C11 - C12 1000 pF Capacitor, 0402 Pkg.
C14 2.2 μF Capacitor, CASE A Pkg.
R1 - R14 100 kOhm Resistor, 0402 Pkg.
R15 1.8 Ohm Resistor, 1206 Pkg.
SW1, SW2 SPDT 4 Position DIP Switch
L1 24 nH Inductor, 0603 Pkg.
U1 HMC625LP5(E) Variable Gain Ampli er
PCB [2] 116958 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR
