AD637
AD637J/AD637A
AD637K/AD637B
AD637S
Typ
Parameter
Min
Typ
Max
Min
Typ
Max
Min
Max
1
Unit
OUTPUT CHARACTERISTICS
Offset Voltage
1
0.5
mV
mV/°C
V
vs. Temperature
±0.05
0.089
±0.04
0.056
±0.04
0.07
Voltage Swing,
0 to 12.0 13.5
0 to 12.0 13.5
0 to 12.0 13.5
±15 V Supply, 2 kΩ Load
Voltage Swing,
±3 V Supply, 2 kΩ Load
0 to 2
6
2.2
0 to 2
6
2.2
0 to 2
6
2.2
V
Output Current
mA
mA
Ω
Short-Circuit Current
20
20
20
Resistance
0.5
0.5
0.5
Chip Select High
Resistance
100
100
100
kΩ
Chip Select Low
dB OUTPUT
Error, VIN 7 mV to 7 V rms,
0 dB = 1 V rms
±0.5
±0.3
±0.5
dB
Scale Factor
−3
−3
−3
mV/dB
Scale Factor Temperature
Coefficient
+0.33
+0.33
+0.33
± of
reading/°C
−0.033
20
−0.033
20
−0.033
20
dB/°C
μA
IREF for 0 dB = 1 V rms
IREF Range
5
1
80
100
5
1
80
100
5
1
80
100
μA
BUFFER AMPLIFIER
Input Output
−VS to (+VS − 2.5 V)
−VS to (+VS − 2.5 V)
−VS to (+VS − 2.5 V)
V
Voltage Range
Input Offset Voltage
Input Current
±0.8
2
±0.5
1
5
±0.8
±2
mV
nA
±2
108
10
±2
108
±2
108
±10
Input Resistance
Output Current
Short-Circuit Current
Small Signal Bandwidth
Slew Rateꢀ
Ω
−0.13
+5
−0.13
+5
−0.13
+5
mA
mA
MHz
V/μs
20
1
20
1
20
1
5
5
5
DENOMINATOR INPUT
Input Range
0 to 10
0 to 10
0 to 10
V
Input Resistance
Offset Voltage
20
25
30
20
25
30
20
25
30
kΩ
mV
±0.2
±0.5
±0.2
±0.5
±0.2
±0.5
CHIP SELECT (CS)
RMS On Level
Open or 2.4 V < VC < +VS
Open or 2.4 V < VC < +VS
VC < 0.2 V
Open or 2.4 V < VC < +VS
RMS Off Level
VC < 0.2 V
VC < 0.2 V
IOUT of Chip Select
CS Low
10
0
10
0
10
0
μA
μA
μs
CS High
On Time Constant
Off Time Constant
POWER SUPPLY
Operating Voltage Range
Quiescent Current
Standby Current
10 + ((25 kΩ) × CAV
10 + ((25 kΩ) × CAV
)
)
10 + ((25 kΩ) × CAV
10 + ((25 kΩ) × CAV
)
)
10 + ((25 kΩ) × CAV
10 + ((25 kΩ) × CAV
)
)
μs
3.0
18
3.0
18
3.0
18
V
2.2
3
2.2
3
2.2
3
mA
μA
350
450
350
450
350
450
1 Specifications shown in bold are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels.
All minimum and maximum specifications are guaranteed, although only those shown in boldface are tested on all production units.
2 Accuracy specified 0 V rms to 7 V rms dc with ADꢀ37 connected, as shown in Figure 5.
3 Nonlinearity is defined as the maximum deviation from the straight line connecting the readings at 10 mV and 2 V.
4 Error vs. crest factor is specified as additional error for 1 V rms.
5 Input voltages are expressed in volts rms. Percent is in ± of reading.
ꢀ With external 2 kΩ pull-down resistor tied to −VS.
Rev. K | Page 4 of 20