Datasheet

AD637
Rev. K | Page 3 of 20
SPECIFICATIONS
At 25°C and ±15 V dc, unless otherwise noted.
1
Table 1.
AD637J/AD637A AD637K/AD637B AD637S
Parameter Min Typ Max Min Typ Max Min Typ Max Unit
TRANSFER FUNCTION
V
OUT
=
2
IN
)(V avg × V
OUT
=
2
IN
)(V avg × V
OUT
=
2
IN
)(V avg ×
CONVERSION ACCURACY
Total Error, Internal Trim
2
(
Figure 5)
±1 ± 0.5 ±0.5 ± 0.2 ±1 ± 0.5
mV ±% of
reading
T
MIN
to T
MAX
±3.0 ± 0.6 ±2.0 ± 0.3 ±6 ± 0.7
mV ± % of
reading
vs. Supply
+V
IN
= 300 mV
30
150
30
150
30
150
μV/V
vs. Supply
−V
IN
= −300 mV
100
300
100
300
100
300
μV/V
DC Reversal
Error at 2 V
0.25 0.1 0.25
% of
reading
Nonlinearity 2 V Full Scale
3
0.04 0.02 0.04
% of FSR
Nonlinearity 7 V Full Scale
0.05 0.05 0.05
% of FSR
Total Error, External Trim ±0.5 ± 0.1 ±0.25 ± 0.05 ±0.5 ± 0.1 mV ± % of
reading
ERROR VS. CREST FACTOR
4
Crest Factor 1 to 2 Specified accuracy Specified accuracy Specified accuracy
Crest Factor = 3 ±0.1 ±0.1 ±0.1 % of
reading
Crest Factor = 10 ±1.0 ±1.0 ±1.0 % of
reading
AVERAGING TIME CONSTANT 25 25 25 ms/μF C
AV
INPUT CHARACTERISTICS
Signal Range, ±15 V Supply
Continuous RMS Level 0 to 7 0 to 7 0 to 7 V rms
Peak Transient Input ±15 ±15 ±15 V p-p
Signal Range, ±5 V Supply
Continuous RMS Level 0 to 4 0 to 4 0 to 4 V rms
Peak Transient Input ±6 ±6 ±6 V p-p
Maximum Continuous
Nondestructive
Input Level
(All Supply Voltages)
±15 ±15 ±15 V p-p
Input Resistance 6.4 8 9.6 6.4 8 9.6 6.4 8 9.6 kΩ
Input Offset Voltage ±0.5 ±0.2 ±0.5 mV
FREQUENCY RESPONSE
5
Bandwidth for 1%
Additional Error
(0.09 dB)
V
IN
= 20 mV 11 11 11 kHz
V
IN
= 200 mV 66 66 66 kHz
V
IN
= 2 V 200 200 200 kHz
±3 dB Bandwidth
V
IN
= 20 mV 150 150 150 kHz
V
IN
= 200 mV 1 1 1 MHz
V
IN
= 2 V 8 8 8 MHz