Datasheet AD604 (Analog Devices) - 7

AD604 TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, G (preamplifier) = 14 dB, VREF = 2.5 V (20 dB/V scaling), f = 1 MHz, RL = 500 Ω, CL = 5 pF, TA = 25°C, and VSS = ±5 V.
50 40.0 37.5 40 THEORETICAL 3 CURVES –40°C, 35.0 ) +25°C, 30 /V +85°C B d ) 32.5 B ACTUAL d G ( ( IN 20 IN L 30.0 A A C G S IN 27.5 10 GA 25.0 0 22.5
6 03 0 00 0- 0- 54
–10
054 0
20.0
00
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 1.25 1.50 1.75 2.00 2.25 2.50 VGN (V) VREF (V)
Figure 3. Gain vs. VGN for Three Temperatures Figure 6. Gain Scaling vs. VREF
60 2.0 50 G (PREAMP) = +14dB 1.5 (0dB TO +48dB) 40 1.0 B) 30 G (PREAMP) = +20dB d 0.5 ) (+6dB TO +54dB) B R ( –40°C +25°C d ( 20 0 IN RRO GA N E 10 AI –0.5 DSX ONLY G +85°C (–14dB TO +34dB) 0 –1.0 –10
4
–1.5
7 00 -00 0- 540 54
–20
00
–2.0
00
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 0.2 0.7 1.2 1.7 2.2 2.7 VGN (V) VGN (V)
Figure 4. Gain vs. VGN for Different Preamplifier Gains Figure 7. Gain Error vs. VGN
50 2.0 ACTUAL 1.5 40 ACTUAL 30dB/V VREF = 1.67V 1.0 30 B) d ) 0.5 FREQ = 1MHz B R ( d ( 20 IN RRO 0 GA N E 20dB/V AI –0.5 10 VREF = 2.5V G FREQ = 5MHz FREQ = 10MHz –1.0 0
5
–1.5
8 00 00 0- 0- 54 54
–10
00
–2.0
00
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 0.2 0.7 1.2 1.7 2.2 2.7 VGN (V) VGN (V)
Figure 5. Gain vs. VGN for Different Gain Scalings Figure 8. Gain Error vs. VGN at Different Frequencies Rev. G | Page 7 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