2-20 GHz Driver Amplifier

Transcription

1 2-2 GHz Driver Amplifier Features Functional Block Diagram Wide bandwidth High linearity Low current consumption Pb-free RoHs compliant 4x4 mm SMT package Description The CMD187C4 is a wideband driver amplifier housed in a leadless surface mount package that is ideally suited for military, space and communications systems where small size and high linearity are needed. At 1 GHz the device delivers greater than 22 db of gain with a corresponding output 1 db compression point of +13 dbm and an output IP3 of 3 dbm. The CMD187C4 is a ohm matched design which eliminates the need for external DC blocks and RF port matching. This amplifier is the perfect alternative to higher cost hybrid amplifiers. Electrical Performance - V dd = 3. V, V gg = 2.V, T A = 2 o C, F=1 GHz Parameter Min Typ Max Units Frequency Range 2-2 GHz Gain 22. db Input Return Loss 22 db Output Return Loss 1 db Output P1dB 13 dbm Output IP3 3 dbm Supply Current 11 ma

2 2-2 GHz Driver Amplifier Specifications Absolute Maximum Ratings Parameter Rating Drain Voltage, V Gate Voltage, 3 V RF Input Power +2 dbm Channel Temperature, Tch 1 C Power Dissipation, Pdiss 6 mw Thermal Resistance 99 C/W Operating Temperature -4 to 8 C Recommended Operating Conditions Parameter Min Typ Max Units V Idd 11 ma 2. V Electrical performance is measured at specific test conditions. Electrical specifications are not guaranteed over all recommended operating conditions. Storage Temperature - to 1 C Operation of this device outside the maximum ratings may cause permanent damage. Electrical Specifications, V dd = 3. V, V gg = 2. V, T A = 2 o C Parameter Min Typ Max Min Typ Max Units Frequency Range GHz Gain db Noise Figure db Input Return Loss 1 11 db Output Return Loss 1 13 db Output P1dB dbm Output IP dbm Supply Current ma Gain Temperature Coefficient Noise Figure Temperature Coefficient.2.2 db/ C.1.1 db/ C

3 Response/dB Noise Figure/dB Response/dB Noise Figure/dB 2-2 GHz Driver Amplifier Typical Performance Broadband Performance, V dd = 3. V, V gg = 2. V, I dd = 11 ma, T A = 2 o C S11 S22 S21 NF Narrow-band Performance, V dd = 3. V, V gg = 2. V, I dd = 11 ma, T A = 2 o C S11 S22 S21 NF =3V NF =4V

4 Noise Figure/dB Gain/dB 2-2 GHz Driver Amplifier Typical Performance Gain vs. Temperature, V dd = 3. V, V gg = 2. V C 28 +8C 27-4C Noise Figure vs. Temperature, V dd = 3. V, V gg = 2. V C +8C -4C

5 Response/dBm P1dB/dBm 2-2 GHz Driver Amplifier Typical Performance P1dB vs. Temperature, V dd = 3. V, V gg = 2. V C 18 +8C 17-4C P1dB & Output IP3, V dd =3V, 4V, V gg = 2. V P1dB =3V P1dB =4V OIP3 =3V OIP3 =4V

6 2-2 GHz Driver Amplifier Mechanical Information Package Information and Dimensions Recommended PCB Land Pattern

7 2-2 GHz Driver Amplifier Pin Description Pin Diagram Vctl 4 bit RF out 3 bit 4 db Functional Description Port A Pad Function Description Schematic 4 db 1, -11, 13, 14, 18, 2, 22, 24 2, 4, 1, 17 and die paddle 4 deg 4 deg Port B N/C Ground No connection required. These pins may be connected to RF/DC ground. Connect to RF / DC ground 3 RF in DC blocked and ohm matched RF in GND For C 12 GND Power supply voltage Decoupling and bypass caps required RF in GB Vctl 16 RF out DC blocked and ohm matched RF out LFT3 1, 2, 3 RF in 23, 21, 19 1, 2, 3 Power supply voltage RF out Decoupling and bypass caps required LO RF RF LFT4 RF out & LO IF Vctl Vctl Vee RF in

8 2-2 GHz Driver Amplifier Applications Information Application Circuit Biasing and Operation The CMD187C4 is biased with a positive drain supply and positive gate supply. Performance is optimized when the drain voltage is set to +3. V. The recommended gate voltage is +2. V. Turn ON procedure: 1.Apply drain voltages V dd1,2,3 and set to +3 V 2.Apply gate voltage V gg and set to +2 V Turn OFF procedure: 1.Turn off gate voltage V gg 2.Turn off drain voltages V dd1,2,3 RF power can be applied at any time. GaAs MMIC devices are susceptible to damage from Electrostatic Discharge. Proper precautions should be observed during handling, assembly and test.

9 2-2 GHz Driver Amplifier Applications Information Evaluation Board The circuit board shown has been developed for optimized assembly at CMDS. A sufficient number of via holes should be used to connect the top and bottom ground planes. As surface mount processes vary, careful process development is recommended. Bill of Material Designator Value Description J1, J2 SMA End Launch Connector P1 1 Pin Header P2 6 Pin Header C1 - C4.33 µf Capacitor, Tantalum C - C8 1 pf Capacitor, 63 C9 - C12 1 pf Capacitor, 42 U1 CMD187C4 Driver Amplifier PCB 18 Evaluation PCB Please note, All information contained in this data sheet is subject to change without notice.