Data Sheet AD8418
SPECIFICATIONS
T
A
= −40°C to +125°C (operating temperature range), V
S
= 5 V, unless otherwise noted.
Table 2.
Parameter Test Conditions/Comments Min Typ Max Unit
GAIN
Initial 20 V/V
Error Over Temperature Specified temperature range ±0.15 %
Gain vs. Temperature −8 +8 ppm/°C
VOLTAGE OFFSET
Offset Voltage, Referred to the Input (RTI) 25°C ±200 µV
Over Temperature (RTI) Specified temperature range ±400 µV
Offset Drift −1 +0.1 +1 µV/°C
INPUT
Input Bias Current 130 µA
Input Voltage Range Common mode, continuous −2 +70 V
Common-Mode Rejection Ratio (CMRR) Specified temperature range, f = dc 90 100 dB
f = dc to 10 kHz 86 dB
OUTPUT
Output Voltage Range R
L
= 25 kΩ 0.015 V
S
− 0.020 V
Output Resistance 2 Ω
DYNAMIC RESPONSE
Small Signal −3 dB Bandwidth 250 kHz
Slew Rate 1 V/µs
0.1 Hz to 10 Hz (RTI) 2.3 µV p-p
Spectral Density, 1 kHz (RTI) 110 nV/√Hz
OFFSET ADJUSTMENT
Ratiometric Accuracy
1
Divider to supplies 0.4995 0.5005 V/V
Accuracy, Referred to the Output (RTO) Voltage applied to V
REF
1 and V
REF
2 in parallel ±1 mV/V
Output Offset Adjustment Range V
S
= 5 V 0.015 V
S
− 0.020 V
Operating Range 2.7 5.5 V
Quiescent Current Over Temperature V
OUT
= 0.1 V dc 2.6 mA
Power Supply Rejection Ratio 80 dB
Temperature Range
For Specified Performance Operating temperature range −40 +125 °C
1
The offset adjustment is ratiometric to the power supply when V
REF
1 and V
REF
2 are used as a divider between the supplies.
Rev. 0 | Page 3 of 16
