AD603SQ/883B2 AD [Analog Devices], AD603SQ/883B2 Datasheet
![no-image](/images/no-image-200.jpg)
AD603SQ/883B2
Related parts for AD603SQ/883B2
AD603SQ/883B2 Summary of contents
Page 1
FEATURES Linear-in-dB gain control Pin-programmable gain ranges − +31 dB with 90 MHz bandwidth with 9 MHz bandwidth Any intermediate range, for example − +41 dB with 30 MHz bandwidth Bandwidth ...
Page 2
AD603 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configurations and Function Descriptions ........................... 5 Typical Performance ...
Page 3
SPECIFICATIONS @ T = 25° ±5 V, –500 mV ≤ otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Input Resistance Input Capacitance 1 Input Noise Spectral Density Noise Figure 1 dB Compression Point Peak Input ...
Page 4
AD603 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage ±V S Internal Voltage VINP (Pin 3) GPOS, GNEG (Pin 1 and Pin2) Internal Power Dissipation Operating Temperature Range AD603A AD603S Storage Temperature Range Lead Temperature (Soldering, 60 sec) Stresses above ...
Page 5
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS GPOS 1 8 AD603 GNEG 2 7 VINP 3 TOP VIEW 6 (Not to Scale) COMM 4 5 Figure 2. 8-Lead SOIC Pin Configuration Table 4. Pin Function Descriptions Pin No. Mnemonic 1 GPOS 2 ...
Page 6
AD603 TYPICAL PERFORMANCE CHARACTERISTICS @ T = 25° ±5 V, –500 mV ≤ otherwise noted 10.7MHz 10 100kHz 0 –10 –0.6 –0.4 –0.2 0 0.2 V (V) G Figure 4. Gain ...
Page 7
HP3326A 8 DUAL- 3 CHANNEL 5 SYNTHESIZER AD603 7 100Ω 0.1µF –5V DATEL DVC 8500 Figure 10. Third-Order Intermodulation Distortion Test Setup 10dB/DIV Figure 11. Third-Order Intermodulation Distortion at 455 kHz (10× Probe Used to HP3585A ...
Page 8
AD603 102 100 100k 1M 10M FREQUENCY (Hz) Figure 16. Input Impedance vs. Frequency (Gain = 30 dB) 1V 100 Figure 17. Gain Control Channel Response Time 4.5V INPUT GND 1V/DIV 500mV OUTPUT ...
Page 9
FREQUENCY (Hz) Figure 22. PSRR vs. Frequency (Worst Case Is Negative Supply PSRR, Shown Here) 0.1µF +5V HP3326A 8 DUAL- 3 CHANNEL 5 SYNTHESIZER AD603 7 100Ω 0.1µF ...
Page 10
AD603 TEST SETUP FIGURE 23 30MHz 16 40MHz 14 12 70MHz 10 8 –40 –30 INPUT LEVEL (dBm) Figure 28. Third-Order Intercept −10 dB/+30 dB Mode, Gain = 30 dB ...
Page 11
THEORY OF OPERATION The AD603 comprises a fixed-gain amplifier, preceded by a broadband passive attenuator 42.14 dB, having a gain control scaling factor per volt. The fixed gain is laser- trimmed in two ...
Page 12
AD603 VPOS 8 SCALING REFERENCE VNEG 6 GPOS GNEG 2 0dB –6.02dB VINP COMM 4 *NOMINAL VALUES. THE GAIN CONTROL INTERFACE The attenuation is controlled through a differential, high impedance (50 MΩ) input, with ...
Page 13
VC1 GPOS VPOS VPOS 1 8 AD603 VC2 2 GNEG VOUT 7 VNEG VIN 3 VINP 6 VNEG 4 COMM FDBK 5 Figure 31 dB; 30 MHz Bandwidth VC1 GPOS VPOS VPOS 1 8 AD603 VC2 ...
Page 14
AD603 USING THE AD603 IN CASCADE Two or more AD603s can be connected in series to achieve higher gain. Invariably, ac coupling must be used to prevent the dc offset voltage at the output of each amplifier from overloading the ...
Page 15
The gains are offset (Figure 39) such that the gain increased only after the gain of A1 has reached its maximum value. Note that for a differential input of –600 mV or less, the gain of a ...
Page 16
AD603 PARALLEL MODE (SIMPLEST GAIN CONTROL INTERFACE) In this mode, the gain control of voltage is applied to both inputs in parallel: the GPOS pins of both A1 and A2 are connected to the control voltage and the GNEW inputs ...
Page 17
APPLICATIONS INFORMATION A LOW NOISE AGC AMPLIFIER Figure 47 shows the ease with which the AD603 can be connected as an AGC amplifier. The circuit illustrates many of the points previously discussed: it uses few parts, has linear-in- dB gain, ...
Page 18
AD603 During the time V is negative with respect to the base OUT voltage of Q1, Q1 conducts; when V OUT Because the average collector current forced to be 300 μA, and the square wave has a ...
Page 19
EVALUATION BOARD The evaluation board of the AD603 enables simple bench-top experimenting to be performed with easy control of the AD603. Built-in flexibility allows convenient configuration to accommodate most operating configurations. Figure photograph of the AD603 evaluation ...
Page 20
AD603 V– GND GPOS R7 C2 GNEG VIN C3 DUT C5 G2 AD603ARZ EVALUATION BOARD Figure 52. Component Side Silk Screen Table 5. Bill of Materials Qty Name Description 5 Capacitors 0.1 μ 0603, X7R ...
Page 21
OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY ORDERING GUIDE Model Temperature Range AD603AR −40°C to +85°C AD603AR-REEL −40°C to +85°C AD603AR-REEL7 −40°C to +85°C 1 AD603ARZ −40°C to +85°C 1 AD603ARZ-REEL −40°C to +85°C 1 AD603ARZ-REEL7 −40°C to +85°C AD603AQ ...
Page 22
AD603 NOTES Rev Page ...
Page 23
NOTES Rev Page AD603 ...
Page 24
AD603 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00539-0-5/07(H) T Rev Page ...