Datasheet AD604 (Analog Devices) - 8

AD604 2.0 50 40 VGN = 2.5V 1.5 VGN = 2.9V 30 1.0 20 VGN = 1.5V B) 20dB/V d 0.5 VREF = 2.5V ) 10 R ( B VGN = 0.5V d ( RRO 0 IN 0 VGN = 0.1V N E GA –10 AI –0.5 G 30dB/V VREF = 1.67V –20 –1.0 –30 VGN = 0V –1.5
9 2 00
–40
01 0- 0- 54 54
–2.0
00
–50
00
0.2 0.7 1.2 1.7 2.2 2.7 100k 1M 10M 100M VGN (V) FREQUENCY (Hz)
Figure 9. Gain Error vs. VGN for Two Gain Scaling Values Figure 12. AC Response for Various Values of VGN
25 2.55 N = 50 VOCM = 2.5V VGN1 = 1.0V VGN2 = 1.0V 2.54 ΔG(dB) = –40°C 20 G(CH1) – G(CH2) 2.53 2.52 E G 15 2.51 A ) NT (V T 2.50 OU +25°C RCE V E 10 2.49 P 2.48 5 2.47 +85°C
10 0
2.46
13 0 0- 0- 54 54
0
00
2.45
00
–1.0 –0.8 –0.6 –0.4 –0.2 0.1 0.3 0.5 0.7 0.9 0.2 0.7 1.2 1.7 2.2 2.7 DELTA GAIN (dB) VGN (V)
Figure 10. Gain Match; VGN1 = VGN2 = 1.0 V Figure 13. Output Offset vs. VGN for Three Temperatures
25 210 N = 50 VGN1 = 2.50V VGN2 = 2.50V ΔG(dB) = 190 20 G(CH1) – G(CH2) 170 ) E G 15 Hz A / V NT n 150 ( E RCE IS E 10 +85°C P NO 130 5 +25°C 110 –40°C
4 11 0 01 0- 0- 54 54
0
00
90
00
–1.0 –0.8 –0.6 –0.4 –0.2 0.1 0.3 0.5 0.7 0.9 0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 DELTA GAIN (dB) VGN (V)
Figure 11. Gain Match; VGN1 = VGN2 = 2.50 V Figure 14. Output Referred Noise vs. VGN for Three Temperatures Rev. G | 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 PREAMPLIFIER DIFFERENTIAL LADDER (ATTENUATOR) AC COUPLING GAIN CONTROL INTERFACE ACTIVE FEEDBACK AMPLIFIER (FIXED-GAIN AMP) APPLICATIONS INFORMATION ULTRALOW NOISE AGC AMPLIFIER WITH 82 dB TO 96 dB GAIN RANGE ULTRALOW NOISE, DIFFERENTIAL INPUT-DIFFERENTIAL OUTPUT VGA MEDICAL ULTRASOUND TGC DRIVING THE AD9050, A 10-BIT, 40 MSPS ADC EVALUATION BOARD CONNECTING A WAVEFORM TO THE AD604-EVALZ DSX INPUT CONNECTIONS Cascade VGAs to Boost Gain PREAMPLIFIER GAIN OUTPUTS DC OPERATING CONDITIONS EVALUATION BOARD ARTWORK AND SCHEMATIC OUTLINE DIMENSIONS ORDERING GUIDE