AD608ARZ Analog Devices Inc, AD608ARZ Datasheet
AD608ARZ
Specifications of AD608ARZ
Available stocks
Related parts for AD608ARZ
AD608ARZ Summary of contents
Page 1
FEATURES Mixer −15 dBm compression point −5 dBm IP3 24 dB conversion gain >500 MHz input bandwidth Logarithmic/limiting amplifier 80 dB RSSI range ±3° phase stability over 80 dB range Low power power ...
Page 2
AD608 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution .................................................................................. 4 Pin ...
Page 3
SPECIFICATIONS T = 25°C, supply = 3 V, dBm is referred to 50 Ω, unless otherwise noted. A Table 1. Parameter Conditions MIXER PERFORMANCE RF and LO Frequency Range LO Power Input terminated in 50 Ω Conversion Gain Driving doubly ...
Page 4
AD608 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltages VPS1, VPS2 Internal Power Dissipation Temperature Range Storage Temperature Range Lead Temperature (Soldering 60 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This ...
Page 5
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic 1 1 VPS1 2 COM1 3 LOHI 4 COM2 5 RFHI 6 RFLO 7 MXOP 8 VMID 9 IFHI 10 IFLO 11 RSSI 12 COM3 13 FDBK ...
Page 6
AD608 TYPICAL PERFORMANCE CHARACTERISTICS 25.0 24.5 24.0 23.5 23.0 22.5 22 100 150 200 250 300 RF FREQUENCY (MHz) Figure 3. Mixer Conversion Gain vs. RF Frequency 0 –1 –2 –3 –4 –5 –6 –7 – ...
Page 7
Figure 9. RSSI Pulse Response/RSSI Rise Time (See Figure 16) 60mV/DIV 20ns/DIV Figure 10. Limiter Rise and Fall Times (See Figure 20) 100ns/DIV 220mV/DIV 1V/DIV 100ns/DIV Figure 11. Limiter Power-Up Response Time (See Figure 17 ...
Page 8
AD608 TEST CIRCUITS PRUP INPUT U1A U1B 4.7kΩ 1 VPS1 PRUP 16 0.1µF VPOS COM1 LMOP 2 15 0.1µF 3 VPS2 14 LOHI 51.1Ω 4 COM2 FDBK 13 1nF COM3 5 RFHI 12 1nF 51. 1Ω RFLO RSSI 11 6 ...
Page 9
THEORY OF OPERATION The AD608 consists of a mixer followed by a logarithmic IF strip with RSSI and hard-limited outputs (see Figure 22). MIXER The mixer is a doubly balanced, modified gilbert-cell mixer. Its maximum input level for linear operation ...
Page 10
AD608 IF FILTER TERMINATIONS The AD608 was designed to drive a parallel-terminated 10.7 MHz band-pass filter (BPF) with a 330 Ω impedance. With a 330 Ω parallel-terminated filter, Pin MXOP sees a 165 Ω termination, and the gain is nominally ...
Page 11
RSSI OUTPUT The logarithmic amplifier uses a successive-detection architecture. Each of the five stages has a full-wave detector; two additional high level detectors are driven by attenuators at the input to the limiting amplifiers, for a total of seven detector ...
Page 12
AD608 APPLICATIONS INFORMATION Figure 24 shows the AD608 configured for operation in a digital system at a 10.7 MHz IF. The input and output impedance of the filter are parallel terminated using 330 Ω resistors, and the conversion gain is ...
Page 13
... COPLANARITY 0.10 ORDERING GUIDE Model Temperature Range AD608AR −40°C to +85°C AD608AR-REEL −40°C to +85°C 1 AD608ARZ −40°C to +85°C 1 AD608ARZ-RL −40°C to +85°C EVAL-AD608EBZ RoHS Compliant Part. 10.00 (0.3937) 9.80 (0.3858 6.20 (0.2441) 1 5.80 (0.2283 ...
Page 14
AD608 NOTES Rev Page ...
Page 15
NOTES Rev Page AD608 ...
Page 16
AD608 NOTES ©1996–2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07886-0-2/09(C) Rev Page ...