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For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
1
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
General Description
Features
Functional Diagram
Typical Applications
The HMC794LP3E is a SiGe BiCMOS low noise
programmable frequency divider in a 3x3mm lead-
less surface mount package. The circuit can be
programmed to divide from N = 1 to N = 4 in the
200 MHz to 2 GHz input frequency range. The high
level output power (up to 10 dBm) with a very low
SSB phase noise and 50% duty cycle makes this
device ideal for low noise clock generation, LO
generation and LO drive applications. Congurable
bias controls allow power minimization of up to 20%.
Low Noise Floor: -163 dBc/Hz at 10 MHz offset
and -160 dBc/Hz at 100 kHz offset
Programmable Frequency Divider, N = 1, 2, 3 or 4
200 MHz to 2 GHz Input Frequency Range
50% Duty Cycle Outputs
Up to +10 dBm Output Power
Sleep Mode: Consumes <1 µA
16 Lead 3X3 mm SMT Package: 9mm2
Electrical Specications, TA = +25° C, Vcc = +5V, Zo = 50Ω, Bias1 = GND
The HMC794LP3E is ideal for:
• LO Generation with Low Noise Floor
• Clock Generators
• Mixer LO Drive
• Military Applications
• Test Equipment
• Sensors
Parameter Conditions Min. Typ. Max. Units
RF Input Characteristics
Max RF Input Frequency 2 GHz
Min RF Input Frequency 200 MHz
RF Input Power Note: best SSB Phase Noise for Pin > 5 dBm -2 310 dBm
Divider Output Characteristics
Differential Output Power Programmable in 2 steps
(see the Pout plots for each division ratio) -3 10 12 dBm
SSB Phase Noise @ 10 MHz Offset
+5 dBm Input Power, 2 GHz Input
-163 dBc/Hz
SSB Phase Noise @ 100 kHz Offset -160 dBc/Hz
SSB Phase Noise @ 10 kHz Offset -153 dBc/Hz
Duty Cycle for Differential Mode +5 dBm Input Power 50 ±3 %
Logic Inputs
VIH Input High Voltage 3 5 V
VIL Input Low Voltage 0 0.4 V
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
2
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Electrical Specications, TA = +25° C, Vcc = +5V, Zo = 50Ω, Bias1 = GND (Continued)
Input Sensitivity Window
Pout vs. Div Ratio [4], (Single-Ended)
Residual Phase Noise
Divide by 1, 2, 3 & 4, (Differential) [3]
Pout vs. Div Ratio [4], (Differential)
Parameter Conditions Min. Typ. Max. Units
Power Supplies
Vcc Analog Supply 4.75 55.25 V
Current Consumption
Itot - Total Current Consumption 5V Supply 100 150 mA
Itot - Total Current Consumption [1]
5V supply, CTRL = 0V, BIAS0 = 0V
CTRL = 0V, BIAS0 = 5V
CTRL = 5V, BIAS0 = 0V
100
109
115
130
150
150
mA
mA
mA
Sleep Current EN = 0V 1 µA
CBias Reference Voltage [2] Measured with 10 G Volt meter 3.8 V
[1] Bias0 = 0V, for maximum frequency range; Bias0 = 5V, for better phase noise oor; CTRL = 5V, for maximum output power
[2] CBias voltage pin cannot drive external load. It must be measured with a 10 G volt meter such as Agilent 34410A, typical 10 MOhms DVM
will read erroneously.
-10
-5
0
5
10
15
0 0.5 1 1.5 2 2.5 3
Div by 1
Div by 2
Div by 3
Div by 4
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-10
-5
0
5
10
15
20
0 0.5 1 1.5 2 2.5
INPUT FREQUENCY (GHz)
INPUT POWER (dBm)
Recommended
Operating Window
-10
-5
0
5
10
15
0 0.5 1 1.5 2 2.5 3
Div by 1
Div by 2
Div by 3
Div by 4
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-180
-170
-160
-150
-140
-130
-120
101102103104105106107
Div By 1
Div By 2
Div By 3
Div By 4
OFFSET FREQUENCY (Hz)
SSB PHASE NOISE (dBc/Hz)
[3] CTRL = +5V, Bias0 = 0V, Pin = +8 dBm @ 2 GHz
[4] CTRL = +5V, Bias0 = 0V, Pin = +4 dBm
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
3
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Pout Divide-by-1 vs. Temperature [1],
(Single-Ended)
Pout Divide-by-3 vs. Temperature [1],
(Single-Ended)
Pout Divide-by-4 vs. CTRL & Bias0 [2]
(Differential)
Pout Divide-by-2 vs. Temperature [1],
(Single-Ended)
Pout Divide-by-3 vs. CTRL & Bias0 [2]
(Single-Ended)
Pout Divide-by-4 vs. Temperature [1],
(Single-Ended)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
+25°C
+85°C
-40°C
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-15
-10
-5
0
5
10
15
0 0.5 1 1.5 2 2.5 3
CTRL = 0V, BIAS0 = 0V
CTRL = 5V, BIAS0 = 0V
CTRL = 0V, BIAS0 = 5V
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
+25°C
+85°C
-40°C
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
+25°C
+85°C
-40°C
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
CTRL = 0V, BIAS0= 0V
CTRL = 5V, BIAS0 = 0V
CTRL = 0V, BIAS0 = 5V
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
+25°C
+85°C
-40°C
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
[1] CTRL = 0V, Bias0 = 0V, Pin = +4 dBm [2] Pin = +4 dBm
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
4
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Pout Divide-by-4 vs. Temperature [1],
(Differential)
Divide-by-2 Harmonics [1], (Differential)
Divide-by-3 Harmonics [1], (Differential)
Pout Divide-by-4 vs. Supply Voltage [1],
(Differential)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
4.75V
5.00V
5.25V
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
-70
-60
-50
-40
-30
-20
-10
0
10
0 0.5 1 1.5 2 2.5 3
H2
H3
H4
H5
INPUT FREQUENCY (GHz)
OUTPUT LEVEL (dBc)
-50
-40
-30
-20
-10
0
10
0 0.5 1 1.5 2 2.5 3
H2
H3
H4
H5
INPUT FREQUENCY (GHz)
OUTPUT LEVEL (dBc)
-50
-40
-30
-20
-10
0
10
0 0.5 1 1.5 2 2.5 3
H2
H3
H4
H5
INPUT FREQUENCY (GHz)
OUTPUT LEVEL (dBc)
-15
-10
-5
0
5
10
0 0.5 1 1.5 2 2.5 3
+25°C
+85°C
-40°C
INPUT FREQUENCY (GHz)
OUTPUT POWER (dBm)
[1] CTRL = 0V, Bias0 = 0V, Pin = +4 dBm
Divide-by-1 Harmonics [1], (Differential)
Divide-by-4 Harmonics [1], (Differential)
-50
-40
-30
-20
-10
0
10
0 0.5 1 1.5 2 2.5 3
H2
H3
H4
H5
INPUT FREQUENCY (GHz)
OUTPUT LEVEL (dBc)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
5
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Absolute Maximum Ratings
RF Input Power 13 dBm
Supply Voltage (Vcc) 5.5V
Control Inputs
(B0, B1, CTRL, Bias0, EN) 5.5V
Junction Temperature 125 °C
Continuous Pdiss (T = 85 °C)
(derate 33 mW/ °C above 85 °C) 1.3W
Thermal Resistance
(Junction to ground paddle) 30 °C/W
Storage Temperature -65 to +125 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1A
Typical Supply Current vs. Vcc
Digital Control Input Voltages
Vcc (V) Icc (mA)
4.75 105*
5.00 115*
5.25 125*
Note: HMC794LP3E will work over full voltage range above.
* For CTRL = 0V, Bias0 = 0V
State B0, B1, CTRL, BIAS1, BIAS0, EN
Low 0 to 0.4V
High 3V to 5V
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Divide-by-4 Harmonics [1], (Differential) Divide-by-4 Harmonics [2], (Single-Ended)
Programming Truth Table
for Frequency Division Ratios
B1 B0 Divide-by
001
012
103
114
0 = Logic Low
1 = Logic High
-50
-40
-30
-20
-10
0
10
0 0.5 1 1.5 2 2.5 3
H2
H3
H4
H5
INPUT FREQUENCY (GHz)
OUTPUT LEVEL (dBc)
-70
-60
-50
-40
-30
-20
-10
0
0 0.5 1 1.5 2 2.5 3
H2
H3
H4
H5
INPUT FREQUENCY (GHz)
OUTPUT LEVEL (dBc)
[1] CTRL = 5V, Bias0 = 0V, Pin = +4 dBm [2] CTRL = 0V, Bias0 = 0V, Pin = +4 dBm
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
6
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Outline Drawing
Part Number Package Body Material Lead Finish MSL Rating Package Marking [1]
HMC794LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 794
XXX
[1] 4-Digit lot number XXXX
[2] Max peak reow temperature of 260 °C
Package Information
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
PCB LAND PATTERN.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
7
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Pin Description
Pin Number Function Description Interface Schematic
1Vcc +5V Voltage Supply
2RFINP RF Positive Input.
Input is DC coupled, external DC blocks required..
3RFINN RF Negative Input.
Input is DC coupled, external DC blocks required...
4GND this pin must be connected to RF/DC ground.
5B0 Division ratio (LSB)
See programming truth table.
6B1 Division ratio (MSB)
See programming truth table.
7CTRL Divider Output Buffer Power Control
13 BIAS1 For proper operation this pin should be grounded.
14 BIAS0 Digital Core Bias Control [1]
15 EN Chip Enable
8, 9, 12 N/C No connection required. This pin may be
connected to ground, without affecting performance.
[1] Divider Core Bias Control Bit
Bias0 = 0V, Divider Core Minimum Bias
Bias0 = 5V, Divider Core Maximum Bias
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
8
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Pin Description (Continued)
Pin Number Function Description Interface Schematic
10 IOUTN Divider Negative Output, Open Drain.
Typically 100 Ohms connected to Vcc.
11 IOUTP Divider Positive Output, Open Drain.
Typically 100 Ohms connected to Vcc.
16 CBIAS External Bypass Decoupling for Precision/Low Noise Bias
Circuit
Application Note:
The HMC794LP3E is a high performance RF divider. Such dividers are high gain devices with internal feedback.
The device will oscillate if used with AC coupled RF inputs and if no RF input is applied. Normally, if the RF input
signal is removed the device should be disabled, or it should be placed in divide by 1 mode. The device is stable
in divide by one mode with no RF input. The device will oscillate in divide 2, 3, or 4 modes with no RF input. In
general very small RF input levels will stop all oscillations. At the minimum rated RF input sensitivity level or higher,
no oscillations or spurious signals exist and excellent low noise performance is achieved.
For input frequency lower than 200 MHz, square wave input signal is recommended.
The divider output power for the differential mode, shows a roll off at lower frequencies due to the limited frequency
range of the T6 & T7 (4:1) RF transformers, 500 MHz to 3000 MHz.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
9
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Evaluation PCB
List of Materials for Evaluation PCB 124842 [1]
Item Description
J3 DC Connectors
J7, J8 SMA-F Johnson Connector
C1, C2, C4, C6,
C10, C11 C12, C18 1 nF Capacitor, 0402 Pkg.
C3, C9, C14, C30,
C31, C33, C34, C36 0.1 µF Capacitor, 0402 Pkg.
C5 10 µF Capacitor, 1206 Pkg.
C7 10,000 pF Capacitor, 0402 Pkg.
C8 10 pF Capacitor, 0402 Pkg.
C15, C35, C37,
C68, C69, C72, C74 4.7 µF Capacitor, 0805 Pkg.
C32 1 µF Capacitor, 0603 Pkg.
R1, R7 100 Ohm, Resistor, 0402 Pkg.
R2 - R6, R9 100 kOhm, Resistor, 0402 Pkg.
R8, L2 0 Ohm, Resistor, 0402 Pkg.
R47 27 k Ohm, Resistor, 0402 Pkg.
R48 15 k Ohm, Resistor, 0402 Pkg.
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 backside ground paddle should be connected
directly to the ground plane similar to that shown. A
sufficient number of via holes should be used to con-
nect the top and bottom ground planes. The evalua-
tion circuit board shown is available from Hittite upon
request.
Item Description
T6, T7 4:1 RF Transformer, MABACT0065
TP1, TP3, TP4 PC Compact SMT
FB1, FB2 Murata BLM21AG02SNID
U1 HMC794LP3E Programmable Divider
U9 Hittite Ultra Low Noise Quad Regulator
PCB [2] 124709 Eval Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350 or Arlon 25FR
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
FREQUENCY DIVIDERS & DETECTORS - SMT
10
HMC794LP3E
v01.0612
2 GHz LOW NOISE PROGRAMMABLE
DIVIDER (N = 1 to 4)
Evaluation PCB Schematic
