Datasheet AD600, AD602 (Analog Devices) - 8

AD600/AD602 102 50mV 101 GAIN = 40dB 100 100 T ) 90 Ω U 99 TP E ( C GAIN = 20dB OU N 98 A D E 97 GAIN = 0dB P M I T 96 PU IN 95 T 10 U 0% 94 P IN
9 12
93
0 00
5V 100ns
8- 8- 53 53 00
92
00
100k 1M 10M 100M FREQUENCY (Hz)
Figure 9. Input Impedance vs. Frequency Figure 12. Gating Feedthrough to Output, Gating Off to On
6 5 50mV ) V 4 AD600 100 m ( 90 E 3 T G U LTA TP 2 AD602 O V OU T E 1 S 0 OFF T U –1 P T 10 T U P 0% –2 OU IN
3
–3
10
5V 100ns
0 -01 8- 38 53 005
–4
00
–0.7 –0.5 –0.3 –0.1 0.1 0.3 0.5 0.7 GAIN CONTROL VOLTAGE (V)
Figure 10. Output Offset Voltage vs. Gain Control Voltage Figure 13. Gating Feedthrough to Output, Gating On to Off (Control Channel Feedthrough)
1V VOUT 1µs 1V 100 100 90 90 T U T U TP P T OU OU T U P 10 10 IN 0% T 0% U P
1
1V VC
1
IN
14 -0
100mV 500ns
0 38 8- 05 53 0 00 Figure 11. Gain Control Channel Response Time. Top: Output Voltage, 2 V Figure 14. Transient Response, Medium and High Gain Maximum, Bottom: Gain Control Voltage VC = ±625 mV Rev. F | Page 8 of 32 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION NOISE PERFORMANCE GAIN-CONTROL INTERFACE SIGNAL-GATING INPUTS COMMON-MODE REJECTION ACHIEVING 80 dB GAIN RANGE SEQUENTIAL MODE (MAXIMUM SNR) PARALLEL MODE (SIMPLEST GAIN-CONTROL INTERFACE) LOW RIPPLE MODE (MINIMUM GAIN ERROR) APPLICATIONS INFORMATION TIME-GAIN CONTROL (TGC) AND TIME-VARIABLE GAIN (TVG) INCREASING OUTPUT DRIVE DRIVING CAPACITIVE LOADS REALIZING OTHER GAIN RANGES ULTRALOW NOISE VCA LOW NOISE, 6 dB PREAMPLIFIER LOW NOISE AGC AMPLIFIER WITH 80 dB GAIN RANGE WIDE RANGE, RMS-LINEAR dB MEASUREMENT SYSTEM (2 MHz AGC AMPLIFIER WITH RMS DETECTOR) 100 dB TO 120 dB RMS RESPONDING CONSTANT BANDWIDTH AGC SYSTEMS WITH HIGH ACCURACY DECIBEL OUTPUTS 100 dB RMS/AGC SYSTEM WITH MINIMAL GAIN ERROR (PARALLEL GAIN WITH OFFSET) 120 dB RMS/AGC SYSTEM WITH OPTIMAL SNR (SEQUENTIAL GAIN) OUTLINE DIMENSIONS ORDERING GUIDE