0.5-4 GHz 6-Bit Digital Attenuator

Transcription

1 .5-4 GHz 6-Bit Digital Attenuator Features Frequency Range :.5 to 4 GHz 31.5dB Attenuation Range.5dB resolution 4.5 db Insertion loss max. +.4dB Attenuation Error 5Ω Impedance 1 Typical Phase variation.2 db RMS Error Integral TTL Driver 24 Lead 6 x 6 x.75 mm QFN Package Functional Diagram Typical Applications Radar Military & Space Instrumentation Test and Measurements Instrumentation Applications Description The AMT232114P is a high performance 6-bit digital attenuator MMIC offering an attenuation range of 31.5dB in steps.5db. This device is in 24 lead TQLMP 6 x 6mm QFN Package. The attenuator bit values are.5db (LSB), 1,2,4,8 and 16dB (MSB) for a total attenuation of 31.5dB. The attenuator features good attenuation accuracy of +.4dB over all 64 states. The attenuator provides an integral TTL driver facilitating a 6-bit control. The driver operates on +5/-5V voltages with minimal DC power consumption. Absolute Maximum Ratings (1) Parameter Absolute Maximum Units RF Input Power 2 dbm Positive Supply Voltage +6 V Negative Supply Voltage -6 V Control Voltage -.5 to +5.5 V Operating Temperature -55 to +85 ºC Storage Temperature -65 to +15 ºC 1. Operation beyond these limits may cause permanent damage to the component Page 1 of 1

2 Electrical Specifications T A = 25 o C, Z o =5 Ω Parameter Min. Typ. Max. Units Frequency.5-4 GHz Insertion Loss db Attenuation Range db Attenuation step db Attenuation Accuracy (All States) Phase variation 1-32 States States - ±.4 - db deg RMS Error db Input/Output Return Loss db Input Power for 1dB Compression dbm DC Bias Voltages - +5, -5 - V Control Voltage - / +5 - V Note: 1. The above mentioned electrical specifications are measured on PCB mounted QFN package. Page 2 of 1

3 On Wafer data T A = 25 o C Insertion Loss -1 Insertion Loss(dB) GHz 1.GHz 1.75GHz 2.5GHz 3.25GHz 4.GHz Frequency 35 Normalized Attenuation 3 25 Attenuation (db) GHz 1.GHz 1.75GHz 2.5GHz 3.25GHz 4.GHz Frequency Page 3 of 1

4 On Wafer data T A = 25 o C.8 Attenuation Error Vs States Attenuation error(db) States 8 Phase Error Vs States 4 Phase error(degree) States Page 4 of 1

5 On Wafer data T A = 25 o C Input Return loss -1 S11(dB) GHz 1.GHz 1.75GHz 2.5GHz 3.25GHz 4.GHz Frequency Output Return loss -1 S22(dB) GHz 1.GHz 1.75GHz 2.5GHz 3.25GHz 4.GHz Frequency Page 5 of 1

6 On Wafer data T A = 25 o C.5 RMS Error.4 RMS error(db) ghz 1.GHz 1.75GHz 2.5GHz 3.25GHz 4.GHz Frequency Page 6 of 1

7 Pin Configuration (Top View) Pin Descriptions ` PIN Function Description 1,2 NC No Connections 3 RF IN RF Input 4 NC No Connection 5,6 +5V DC Supply Voltage 7 A1 DC Control Voltage 8 A2 DC Control Voltage 9 A3 DC Control Voltage 1 A4 DC Control Voltage 11 A5 DC Control Voltage 12 A6 DC Control Voltage 13,14-5V DC Supply Voltage 15 NC No Connection 16 RF OUT RF Output 17,18 NC No Connections GND Ground Page 7 of 1

8 Test Board Pattern Note: 1. Circuit board material: Rogers Input\Output signal lines have 5Ω impedance 3. No off chip component is required. Package Outline Drawing 6.±.1.75±.5 3.4±.5 DAP 4.2x4.2 6.±.1 3.4±.5 C'.45x45.25±.5 PIN1 AREA.5±.5.8±.5.4±.5 NOTE 1. JEDEC REFERENCE : MO22I - WJJB 2. LEADFRAME - PPF.2±.25.75±.5 Page 8 of 1

9 Truth Table State Attenuation TTL Control ( 1 = 3 to 5 V, = to.2 V ) (db) A6 (16) A5 (8) A4(4) A3 (2) A2(1) A1 (.5) Page 9 of 1

10 Truth Table Attenuation TTL Control ( 1 = 3 to 5 V, = to.2 V ) State (db) A6 (16) A5 (8) A4(4) A3 (2) A2(1) A1 (.5) 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 Page 1 of 1