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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
LIMITING AMPLIFIERS - SMT
6
6 - 1
HMC750LP4 / 750LP4E
v03.0111
Functional Diagram
Electrical Specications, TA = +25° C, Vcc = +5V, VC1 = +2.5V
The HMC750LP4(E) is ideal for:
• OC-192 Receivers
• 10 Gbps Ethernet Receivers
• 10 Gbps Fiber Channel Receivers
• Broadband Test & Measurement
Supports Data Rates up to 12.5 Gbps
Differential Gain: 44 dB
2mV p-p input Sensitivity
3 dB Bandwidth: 11 GHz
Integrated DC Offset Correction
Adjustable Differential Saturated
O/P Voltage Swing up to 880 mVp-p
Single +5V Power Supply
Very Low RMS Jitter Degradation
24 Lead Plastic 4x4mm SMT Package: 16mm
HMC750LP4E is a limiting amplier designed to sup-
port data transmission rates up to 12.5 Gbps. The
amplier can operate over a wide range of input voltage
levels and provides constant-level differential output
swing. HMC750LP4E also features an output level
control pin, VC1, which allows for loss compensation
or for signal level optimization. Differential output
signal swing can be adjustable up to 880 mVp-p.
Input signals higher than 3mV p-p can be amplied to
saturated 880mV p-p differential signal.
All single-ended input signals to the HMC750LP4E
are terminated with 50 ohms to +5V on-chip, and
may be either AC or DC coupled. The outputs of the
HMC750LP4E may be operated either differentially
or single-ended. Outputs can be connected directly
to a 50 ohm terminated system referenced to +5V,
while DC blocking capacitors may be used if the
terminating system is 50 ohms to a non +5V voltage.
The HMC750LP4E operates from a single + 5V DC
supply and is available in a plastic RoHS compliant
4x4 mm SMT package.
Parameter Conditions Min. Typ. Max. Units
Power Supply Voltage 4.6 5 5.4 V
Power Supply Current VC1 = 2.5V 106 122 mA
Maximum Data Rate 12.5 Gbps
Differential Small Signal Gain VC1 = 2.5V 44 dB
Small Signal Bandwidth 3-dB Cutoff 11 GHz
Deterministic Jitter [1] Vin = 20 mV peak to peak 5 ps p-p
Additive Random Jitter [2] Vin = 200 mV peak to peak 0.2 ps rms
Typical Applications Features
General Description
12.5 Gbps LIMITING AMPLIFIER
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
LIMITING AMPLIFIERS - SMT
6
6 - 2
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
Parameter Conditions Min. Typ. Max. Units
Rise Time 20% - 80% 23 27 ps
Fall Time 20% - 80% 21 23 ps
Data Output Swing Differential Output Swing.
VC1 = 3V for maximum output swing. 850 880 mVp-p
Input Return Loss up to 10 GHz 15 dB
Output Return Loss up to 10 GHz 8 dB
Input Sensitivity 2 mVp-p
Maximum Input Swing 1200 mVp-p
Output Offset Voltage VC1 = 3V for maximum output swing 3 mV
VC1 2 3 V
Vout DC 4.5 4.8 V
[1] Deterministic jitter measured at 10 Gbps with PRBS 223-1 pattern. It is the peak to peak deviation from the ideal time crossing
[2] Random jitter is measured with 10 Gbps 10101… pattern
Electrical Specications (Conditions)
Differential Output vs. Supply Voltage [1] Differential Output vs. Control Voltage [2]
0
200
400
600
800
1000
4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4
+25C
+85C
-40C
SUPPLY VOLTAGE Vcc (V)
DIFFERENTIAL VOLTAGE (mV)
0
200
400
600
800
1000
1200
2.1 2.3 2.5 2.7 2.9 3.1
+25C
+85C
-40C
CONTROL VOLTAGE VC1 (V)
DIFFERENTIAL VOLTAGE (mV)
[1] VC1 = 2.5V [2] Vcc = 5V [3] Input Data Rate = 10 Gbps
Differential Output vs. Vinput [1][2] RMS Jitter vs. Vinput [1][2][3]
0
100
200
300
400
500
600
0.1 1 10 100 1000
Vin (mV)
DIFFERENTIAL VOLTAGE (mV)
0
1
2
3
4
5
6
0 100 200 300 400 500 600
Vin (mV)
RMS JITTER (ps)
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
LIMITING AMPLIFIERS - SMT
6
6 - 3
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
Rise & Fall Time vs. Vinput [1] [2] [3] DC Current vs. Supply Voltage [1] [3]
20
24
28
32
36
40
0 100 200 300 400 500 600
Rise Time
Fall Time
Vin (mV)
RISE TIME, FALL TIME 20%-80% (ps)
0
40
80
120
160
200
4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4
+25C
+85C
-40C
SUPPLY VOLTAGE Vcc (V)
DC CURRENT (mA)
[1] VC1 = 2.5V [2] Vcc = 5V [3] Input Data Rate = 10 Gbps
DC Current vs. Control Voltage [2] [3] Differential Gain vs. Frequency [1] [2]
20
50
80
110
140
170
200
2.1 2.3 2.5 2.7 2.9 3.1
+25C
+85C
-40C
CONTROL VOLTAGE Vc1 (V)
DC CURRENT (mA)
0
10
20
30
40
50
0 2 4 6 8 10 12 14 16
FREQUENCY (GHz)
GAIN (dB)
Return Loss [1] [2]
-50
-40
-30
-20
-10
0
0 2 4 6 8 10 12 14 16
s11
s22
FREQUENCY (GHz)
RETURN LOSS (dB)
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
LIMITING AMPLIFIERS - SMT
6
6 - 4
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
Output Eye Diagram
Test Conditions
Eye diagram data presented on an Innium
DCA 86100A
Rate = 10 Gb/s
Pseudo Random Code = 223 -1
Vin = 100 mVpp differential, VC1 = 3V
Output Eye Diagram
Test Conditions
Eye diagram data presented on an Innium
DCA 86100A
Rate = 10 Gb/s
Pseudo Random Code = 223 -1
Vin = 500 mVpp differential, VC1 = 3V
Current Minimum Maximum Total Meas
Rise Time (f1) 23.33 ps 23.33 ps 23.33 ps 32
Fall Time (f1) 24.67 ps 24.00 ps 25.33 ps 32
Differential Eye
Amplitude (f1) 860 mV 858 mV 860 mV 32
Eye S/N (f1) 15.35 15.28 15.50 32
Vertical Scale 100 mV / div
Horizontal Scale 30.0 ps / div
Current Minimum Maximum Total Meas
Rise Time (f1) 23.33 ps 22.67 ps 23.33 ps 30
Fall Time (f1) 24.67 ps 24.67 ps 26.00 ps 30
Differential Eye
Amplitude (f1) 862 mV 861 mV 862 mV 30
Eye S/N (f1) 15.27 15.19 15.35 30
Vertical Scale 100 mV / div
Horizontal Scale 30.0 ps / div
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
LIMITING AMPLIFIERS - SMT
6
6 - 5
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
Input Signal Output Signal
Input and output signal for 10 Gbps, PRBS 223 -1, 3.5mV p-p differential, VC1 = 3V.
Supply Voltage 5.6V
Input Signals 4V to 5.5V
RF Input Power 10 dBm
Junction Temperature 125 °C
Continuous Pdiss (T = 85°C)
(Derate 24 mW/°C above 85°C) 0.95 Watts
Thermal Resistance (Rth)
(junction to ground paddle) 42 °C/W
Storage Temperature -65 to 150 °C
Operating Temperature -40 to +85 °C
Absolute Maximum Ratings
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
LIMITING AMPLIFIERS - SMT
6
6 - 6
Outline Drawing
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC750LP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H750
XXXX
HMC750LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H750
XXXX
[1] Max peak reow temperature of 235 °C
[2] Max peak reow temperature of 260 °C
[3] 4-Digit lot number XXXX
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 HMC APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN.
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
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
LIMITING AMPLIFIERS - SMT
6
6 - 7
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
Pin Number Function Description Interface Schematic
1, 18, 19,
22 - 24 Vcc Positive supply.
2, 5, 14, 17,
Ground Paddle GND Signal and supply ground. Package
base must be connected to DC ground.
3, 4 INP, INN Data inputs
6, 7,
9 - 13 N/C No connection. These pins are not connected internally,
but should be connected to ground externally.
8 VC1 Gain, output level control.
15, 16 OUTN, OUTP Data outputs
20, 21 CN, CP Filter capacitor for offset correction.
Connect 100nF capacitor between CP and CN.
Pin Descriptions
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
LIMITING AMPLIFIERS - SMT
6
6 - 8
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 con-
nected 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 121600 [1]
Item Description
J1 - J4 PCB Mount SMA Connector
J6, J8, J9 DC Pin
C1, C2, C13 0.1 µF Capacitor, 0402 Pkg.
C5 - C7 1 nF Capacitor, 0402 Pkg.
C14 4.7 µF Capacitor, 0402 Pkg.
C16 100 pF Capacitor, 0402 Pkg.
C17 10 nF Capacitor, 0402 Pkg.
R1 -R4 0 Ohm Resistor, 0402 Pkg.
R7 620 Ohm Resistor, 0402 Pkg.
U1 HMC750LP4(E) Limiting Amplier
PCB [2] 121598 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
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
LIMITING AMPLIFIERS - SMT
6
6 - 9
Application Circuit
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
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
LIMITING AMPLIFIERS - SMT
6
6 - 10
HMC750LP4 / 750LP4E
v03.0111
12.5 Gbps LIMITING AMPLIFIER
Application Information
Setting the output swing using external resistor Rc
The HMC750LP4E features output swing level adjustment by using VC1 pin. Output swing can be adjusted to the
desired level by applying a DC voltage to VC1 pin. Differential output swing vs. control voltage relationship is given in
the plot below.
Differential Output vs. Control Voltage
0
200
400
600
800
1000
1200
2.1 2.3 2.5 2.7 2.9 3.1
+25C
+85C
-40C
CONTROL VOLTAGE VC1 (V)
DIFFERENTIAL VOLTAGE (mV)
In order to adjust the DC voltage on VC1 pin a resistor, Rc (R7 in application circuit), should be connected between
VC1 pin and VCC as shown in the gure below.
The value of the resistor can be chosen using the following equation as a function of VC1. VC1 DC voltage value can
be chosen by using the plot given above.
