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HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
Features
Wide Bandwidth: 5 - 30 GHz Excellent Linearity: +25 dBm Input P1dB Wide Attenuation Range: 30 dB 24 Lead Ceramic 4x4mm SMT Package: 16mm2
5
ATTENUATORS - ANALOG - SMT
Typical Applications
The HMC812LC4 is ideal for: * Point-to-Point Radio * VSAT Radio * Test Instrumentation * Microwave Sensors * Military, ECM & Radar
Functional Diagram
General Description
The HMC812LC4 is an absorptive Voltage Variable Attenuator (VVA) which operates from 5 - 30 GHz and is ideal in designs where an analog DC control signal must be used to control RF signal levels over a 30 dB amplitude range. It features two shunt-type attenuators which are controlled by two analog voltages, Vctrl1 and Vctrl2. Optimum linearity performance of the attenuator is achieved by first varying Vctrl1 of the 1st attenuation stage from -3V to 0V with Vctrl2 fixed at -3V. The control voltage of the 2nd attenuation stage, Vctrl2, should then be varied from -3V to 0V, with Vctrl1 fixed at 0V. The HMC812LC4 is housed in a RoHS compliant 4x4 mm QFN leadless ceramic package However, if the Vctrl1 and Vctrl2 pins are connected together it is possible to achieve the full analog attenuation range with only a small degradation in input IP3 performance. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave point-to-point and VSAT radios.
Electrical Specifi cations, TA = +25 C, 50 Ohm system
Parameter Insertion Loss Attenuation Range Input Return Loss Output Return Loss Input Power for 1 dB Compression (any attenuation) Input Third Order Intercept (Two-tone Input Power = 10 dBm Each Tone) 5 - 16 GHz 16 - 24 GHz 24 - 30 GHz Min. Typ. 2 3 4 30 12 8 25 28 Max. Units dB dB dB dB dB dB dBm dBm
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For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
Attenuation vs. Frequency over Vctrl Vctrl1 = Variable, Vctrl2 = -3V
0
Attenuation vs. Frequency over Vctrl Vctrl1 = 0V, Vctrl2 = Variable
0
5
ATTENUATORS - ANALOG - SMT
5 - 219
-5 ATTENUATION (dB) ATTENUATION (dB)
-10
-10
-20
-15
-3.0 V -1.8 V -1.4 V -0.8 V 0.0 V
-30
-3.0 V -2.0 V -1.6 V -1.0 V 0.0 V
-20
-40
-25 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
-50 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
Attenuation vs. Vctrl1 Over Temperature @ 10 GHz, Vctrl2 = -3V
0
Attenuation vs. Vctrl2 Over Temperature @ 10 GHz, Vctrl1 = 0V
0 -5
+25 C +85 C -40 C
-3 ATTENUATION (dB) ATTENUATION (dB) -10 -15 -20 -25 -30 -35 -3 -2.5 -2 -1.5 Vctrl1 (V) -1 -0.5 0 -3 -2.5 -2 -1.5 Vctrl2 (V)
-6
-9
+25 C +85 C -40 C
-12
-15
-1
-0.5
0
Attenuation vs. Pin @ 10 GHz Vctrl1 = Variable, Vctrl2 = -3V
0 -3 -6 -9 -12 -15 -18 0 3 6 9 12 15 18 INPUT POWER (dBm)
-3.0 V -1.8 V -1.4 V -0.8 V 0.0 V
Input Return Loss Vctrl1 = Variable, Vctrl2 = -3V
0
RETURN LOSS (dB)
ATTENUATION (dB)
-10
-20
-30
-3.0 V -1.6 V 0.0 V
-40 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
5
ATTENUATORS - ANALOG - SMT
Input Return Loss Vctrl1 = 0V, Vctrl2 = Variable
0
Output Return Loss Vctrl1 = Variable, Vctrl2 = -3V
0
RETURN LOSS (dB)
-10
RETURN LOSS (dB)
-10
-20
-20
-3.0 V -1.6 V 0.0 V
-30
-3.0 V -1.6 V 0.0 V
-30 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
-40 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
Output Return Loss Vctrl1 = 0V, Vctrl2 = Variable
0
Input IP3 vs Input Power @ 10 GHz Vctrl1 = Variable, Vctrl2 = -3V
60
50 RETURN LOSS (dB) -10 IP3 (dBm) -20
-3.0 V -1.4 V 0.0 V
40
30
-3.0 V -2.6 V -2.2 V -1.8 V 0.0 V
20
-30 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
10 0 3 6 9 12 15 18 SINGLE TONE INPUT POWER (dBm)
Input IP3 vs. Input Power Over Frequency Vctrl1 = -2.2V, Vctrl2 = -3V (Worst Case IP3)
35
Input IP3 vs. Input Power Over Temperature @ 10 GHz, Vctrl1 = -2.2V, Vctrl2 = -3V
35
30 IP3 (dBm) IP3 (dBm)
30
25
5 GHz 10 GHz 20 GHz 30 GHz
25
+25 C +85 C -40 C
20 0 3 6 9 12 15 18 SINGLE TONE INPUT POWER (dBm)
20 0 3 6 9 12 15 18 SINGLE TONE INPUT POWER (dBm)
5 - 220
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
Attenuation vs. Frequency over Vctrl Vctrl1 = Vctrl2
0
Attenuation vs. Vctrl over Temperature @ 10 GHz, Vctrl1 = Vctrl2
0
5
ATTENUATORS - ANALOG - SMT
5 - 221
-10 ATTENUATION (dB) ATTENUATION (dB) -10
-20
-20
-30
-3.0 V -1.8 V -1.4 V -0.8 V 0.0 V
-30
-40
+25 C +85 C -40 C
-50 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
-40 -3 -2.5 -2 -1.5 -1 -0.5 0 CONTROL VOLTAGE (V)
Attenuation vs. Input Power over Vctrl Vctrl1 = Vctrl2
0
Input Return Loss, Vctrl1 = Vctrl2
0
-10 RETURN LOSS (dB) ATTENUATION (dB) -10
-20
-20
-30
-3.0 V -1.8 V -1.4 V -0.8 V 0.0 V
-30
-40
-3.0 V -1.6 V 0.0 V
-50 0 3 6 9 12 15 18 INPUT POWER (dBm)
-40 2 6 10 14 18 22 26 30 FREQUENCY (GHz)
Output Return Loss, Vctrl1 = Vctrl2
0
Input IP3 vs. Input Power Over Vctrl @ 10 GHz, Vctrl1 = Vctrl2
60 50
RETURN LOSS (dB)
-10 IP3 (dBm) -20
-3.0 V -1.6 V 0.0 V
40 30 20 10 0 2 6 10 14 18 22 26 30 0 3 6 9 12 15 18 FREQUENCY (GHz) SINGLE TONE INPUT POWER (dBm)
-3.0 V -2.6 V -2.2 V -1.8 V 0.0 V
-30
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
5
ATTENUATORS - ANALOG - SMT
Absolute Maximum Ratings
RF Input Power Control Voltage Range Channel Temperature Continuous Pdiss (T = 85 C) (derate 16.4 mW/ C above 85 C) Thermal Resistance (Channel to ground paddle) Storage Temperature Operating Temperature +30 dBm +1 to -5V 150 C 1W 61 C/W -65 to +150 C -40 to +85 C
Control Voltages
Vctrl1 Vctrl2 -3 to 0V @ 10 A -3 to 0V @ 10 A
ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS
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 0.05mm MAX. 7. PACKAGE WARP SHALL NOT EXCEED 0.05mm 8. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 9. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN.
5 - 222
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
Pin Descriptions
Pin Number 1, 2, 6 - 8, 11 - 13, 17 - 24 3, 5, 14, 16 Function N/C Description No connection Interface Schematic
5
GND Die bottom must be connected to RF/DC ground.
4
RFIN This pad is DC coupled and matched to 50 Ohms. A blocking capacitor is required if RF line potential is not equal to 0V.
15
RFOUT
9
Vctrl1
Control Voltage 1
10
Vctrl2
Control Voltage 2
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
5 - 223
ATTENUATORS - ANALOG - SMT
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
5
ATTENUATORS - ANALOG - SMT
Application Circuit
5 - 224
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC812LC4
v00.0309
GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz
Evaluation PCB
5
ATTENUATORS - ANALOG - SMT
List of Materials for Evaluation PCB 123768 [1]
Item J1, J2 J3, J4 C1, C2 C3, C4 C5, C6 U1 PCB [2] Description 2.9 mm PC Mount RF Connector DC Pin 100 pF Capacitor, 0402 Pkg. 1000 pF Capacitor, 0402 Pkg. 4.7 F Capacitor, CASE A HMC812LC4 Analog VVA 123766 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Arlon 25FR or Rogers 4350
The circuit board used in the final 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.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
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