GHz 6-Bit Digital Phase Shifter

Transcription

1 GHz 6-Bit Digital Phase Shifter Features Frequency Range: 1.1 to 1.5 GHz RMS Error ~ 1.6 deg. 5 db Insertion Loss TTL Control Inputs.5-um InGaAs phemt Technology 28 Lead 7. x 7. x.8 mm 3 QFN Package Typical Applications Gnd RF_In Gnd Functional Diagram Gnd 19 RF_Out Gnd Radar Military & Space Instrumentation +5v v 9 A1 1 A2 11 A3 12 A4 13 A5 14 A Description The ASL21P7 is a 6-bit digital phase shifter MMIC packaged in an open cavity QFN package. It is designed to operate over a frequency band of GHz. The phase shifter features a low RMS error of 1.6 deg. The midband insertion loss is 4.5 db and varies within ±.5 db over the entire frequency band and over the 64 phase states. The input/output ports are well matched to 5 Ohms. The integrated TTL compatible drivers provide a convenient digital interface for 6-bit control. The package operates with +5V and -5V DC supply at a very low current. Absolute Maximum Ratings (1) Parameter Absolute Maximum Units RF Input Power 3 dbm Positive Supply Voltage +6 V Negative Supply Voltage -6 V Control Voltage ON OFF +5 to to V V Operating Temperature -4 to +85 ºC Storage Temperature -65 to +15 ºC 1. Operation beyond these limits may cause permanent damage to the component Fax: Page 1 of 1

2 Electrical Specifications TA = 25 o C, Zo =5 Parameter Value Units Frequency GHz Phase Shift -36 in 64 Steps deg Insertion Loss (Typ.) db Insertion Loss Variation ±.6 ±.5 db Peak Phase Error -5 to +5-3 to +5 deg RMS Error (Mid band) deg Port1 Return Loss (Min.) db Port2 Return Loss (Min.) db Input P1dB (2) 23 dbm DC Supply +5/6, -5/3 V/mA Control Voltage ON OFF TTL Compatible +5 V V Switching Speed 4 ns Note: 1. The above mentioned electrical specifications are measured on PCB mounted QFN package. 2. Input P1dB is measured for Major states 1.2GHz Fax: Page 2 of 1

3 Test Fixture Data T A = 25 o C -3 Insertion Loss IL (db) RMS Error 4 RMS Error (deg.) Fax: Page 3 of 1

4 Test Fixture Data T A = 25 o C Relative Phase Shift -6 Phase (degs.) PPE Vs Frequency PPE (deg.) Fax: Page 4 of 1

5 Test Fixture Data T A = 25 o C Port1 Return Losses -5-1 RL (db) Port2 Return Losses -5-1 RL (db) Fax: Page 5 of 1

6 Pin Configuration Gnd RF_Out Gnd AMT OP 28 Lead QFN 7mm x 7mm 2 Gnd Gnd RF_In v A6 A5 A4 A3 A2 A1-5v BOTTOM VIEW Pin Description QFN PIN Nos. Description 3, 4 RF_IN 18, 19 RF_OUT 9-14 Controls A1-A6 7 +5V 8-5V 2, 5, 17, 2 Gnd Note: All the Other Pins are Not Connected (), but need to be externally grounded on the PCB. Fax: Page 6 of 1

7 GND GND IN +5V GND -5V A1 A2 A3 A4 A5 A6 +5V GND -5V OUT GND GND ASL 21P7 Test Board Pattern A A Gnd Gnd RF_In 3 4 ASTRA RF_Out Gnd Gnd 16 +5v v 9 1 A1 A2 11 A3 12 A A5 A6 33. A A 32. Note: 1. Dimensions in mm. 2. Circuit board material: Rogers 588, 2mil 3. Input / Output signal lines have 5Ω impedance Fax: Page 7 of 1

8 Package Outline Drawing BOTTOM VIEW Note: All Dimensions are in mm Fax: Page 8 of 1

9 Truth Table State Phase Shift (deg.) A6 (18) TTL Control ( 1 = 3 to 5 V, = to.5 V ) A5 A4 A3 A2 (9) (45) (22.5) (11.25) A1 (5.625) Fax: Page 9 of 1

10 Truth Table State Phase Shift (deg.) A6 (18) TTL Control ( 1 = 3 to 5 V, = to.5 V ) A5 A4 A3 A2 (9) (45) (22.5) (11.25) A1 (5.625) GaAs MMIC devices are susceptible to Electrostatic discharge. Proper precautions should be observed during handling, assembly & testing All information and Specifications are subject to change without prior notice Fax: Page 1 of 1