Datasheet

AD8494/AD8495/AD8496/AD8497
Rev. C | Page 3 of 16
SPECIFICATIONS
+V
S
= 5 V, −V
S
= 0 V, V
+IN
= V
−IN
= 0 V, V
REF
= 0 V, T
A
= T
RJ
= 25°C, R
L
= 100 k, unless otherwise noted. Specifications do not include
gain and offset errors of the thermocouple itself. T
A
is the ambient temperature at the AD849x; T
RJ
is the thermocouple reference junction
temperature; T
MJ
is the thermocouple measurement junction temperature.
Table 2.
A Grade C Grade
Parameter Test Conditions/Comments Min Typ Max Min Typ Max Unit
TEMPERATURE ACCURACY
Initial Accuracy
AD8494/AD8495 T
A
= T
RJ
= T
MJ
= 25°C 3 1 °C
AD8496/AD8497 T
A
= T
RJ
= 60°C, T
MJ
= 175°C 3 1.5 °C
Ambient Temperature
Rejection
1
AD8494/AD8495 T
A
= T
RJ
= 0°C to 50°C 0.05 0.025 °C/°C
AD8496/AD8497 T
A
= T
RJ
= 25°C to 100°C 0.05 0.025 °C/°C
Gain Error
2, 3
V
OUT
= 0.125 V to 4.125 V
AD8494/AD8495 0.3 0.1 %
AD8496/AD8497 0.3 0.1 %
Transfer Function 5 5 mV/°C
INPUTS
Input Voltage Range −V
S
– 0.2 +V
S
– 1.6 −V
S
– 0.2 +V
S
– 1.6 V
Overvoltage Range +V
S
– 25 −V
S
+ 25 +V
S
– 25 −V
S
+ 25 V
Input Bias Current
4
25 50 25 50 nA
Input Offset Current 1.5 0.5 nA
Common-Mode Rejection V
CM
= 0 V to 3 V 1 0.3 °C/V
Power Supply Rejection +V
S
= 2.7 V to 5 V 0.5 0.5 °C/V
NOISE
Voltage Noise f = 0.1 Hz to 10 Hz, T
A
= 25°C 0.8 0.8 μV p-p
Voltage Noise Density f = 1 kHz, T
A
= 25°C 32 32 nV/√Hz
Current Noise Density f = 1 kHz, T
A
= 25°C 100 100 fA/√Hz
REFERENCE INPUT
Input Resistance 60 60 kΩ
Input Current 25 25 μA
Voltage Range −V
S
+V
S
−V
S
+V
S
V
Gain to Output 1 1 V/V
OUTPUT
Output Voltage Range −V
S
+ 0.025 +V
S
– 0.1 −V
S
+ 0.025 +V
S
– 0.1 V
Short-Circuit Current
5
7 7 mA
DYNAMIC RESPONSE
−3 dB Bandwidth
AD8494 30 30 kHz
AD8495/AD8497 25 25 kHz
AD8496 31 31 kHz
Settling Time to 0.1% 4 V output step
AD8494 36 36 μs
AD8495/AD8497 40 40 μs
AD8496 32 32 μs
POWER SUPPLY
Operating Voltage Range
6
Single Supply 2.7 36 2.7 36 V
Dual Supply ±2.7 ±18 ±2.7 ±18 V
Quiescent Current 180 250 180 250 μA