AD737_12 Datasheet, PDF (8/24 Pages) Analog Devices – Low Cost, Low Power, True RMS-to-DC Converter

AD737
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, ±VS = ±5 V (except AD737J-5, where ±VS = ±2.5 V), CAV = 33 µF, CC = 10 µF, f = 1 kHz, sine wave input applied to Pin 2,
unless otherwise specified.
0.7
V_IN = 200mV rms
C_AV = 100µF
0.5 _{CF = 22µF}
10V
C_AV = 22µF, C_F = 4.7µF, C_C = 22µF
1V
0.3
100mV
1% ERROR
0.1
0
10mV
–0.1
–3dB
1mV
–0.3
10% ERROR
–0.5
0
2
4
6
8
10
12
14
16
SUPPLY VOLTAGE (±V)
Figure 4. Additional Error vs. Supply Voltage
16
DC COUPLED
14
12
10
PIN 1
8
PIN 2
6
4
2
0
0
2
4
6
8
10
12
14
16
SUPPLY VOLTAGE (±V)
Figure 5. Peak Input Level for 1% Saturation vs. Supply Voltage
25
20
100µV
0.1
1
10
100
FREQUENCY (kHz)
1000
Figure 7. Frequency Response Driving Pin 1; Negative DC Output
10V
C_AV = 22µF, C_F = 4.7µF, C_C = 22µF
1V
100mV
10mV
1% ERROR
1mV
10% ERROR
–3dB
100µV
0.1
1
10
100
FREQUENCY (kHz)
1000
Figure 8. Frequency Response Driving Pin 2; Negative DC Output
6
3ms BURST OF 1kHz =
3 CYCLES
5 ^{200mV rms SIGNAL}
C_C = 22µF
C_F = 100µF
4
C_AV = 10µF
C_AV = 33µF
15
3
10
5
0
2
4
6
8 10 12 14 16 18
DUAL SUPPLY VOLTAGE (±V)
Figure 6. Supply Current (Power-Down Mode) vs. Supply Voltage (Dual)
2
1
C_AV = 100µF
C_AV = 250µF
0
1
2
3
4
5
CREST FACTOR (V_PEAK/V rms)
Figure 9. Additional Error vs. Crest Factor
Rev. I | Page 8 of 24