Data Sheet AD8208
Rev. C | Page 3 of 20
SPECIFICATIONS
T
OPR
= −40°C to +125°C for AD8208WBR and AD8208WBRM grade, TOPR = −40°C to +150°C for AD8208WHR grade, T
A
= 25°C, V
S
=
5 V, R
L
= 25 kΩ (R
L
is the output load resistor), unless otherwise noted. Specifications applicable for both packages (SOIC and MSOP).
Table 1.
Parameter Test Conditions
1
Min Typ Max Unit
Initial 20 V/V
Error vs. Temperature 0.075 V ≤ V
OUT
≤ (V
S
− 0.1 V), dc, T
OPR
±0.3 %
Gain Drift T
OPR
0 −20 ppm/°C
VOLTAGE OFFSET
Initial Input Offset (Referred to Input [RTI]) V
CM
= 0.15 V, T
A
±2 mV
Input Offset (RTI) Over Temperature V
CM
= 0 V, T
OPR
±4 mV
Voltage Offset vs. Temperature V
CM
= 0 V, T
OPR
−20 +20 µV/°C
INPUT
Input Impedance
Differential 360 400 440 kΩ
V
CM
(Continuous) −2 +45 V
CMRR
2
V
CM
= −2 V to +45 V, dc 80 100 dB
f = dc to 10 kHz,
3
T
OPR
80 dB
PREAMPLIFIER (A1)
Gain 10 V/V
OUT
S
OPR
Output Voltage Range AD8208WBR, AD8208WBRM 0.0375 V
S
− 0.1 V
AD8208WHR, AD8208WHRM 0.05 V
S
− 0.1 V
Output Resistance 97 100 103 kΩ
OUTPUT BUFFER (A2)
Gain 2 V/V
Gain Error 0.075 V ≤ V
OUT
≤ (V
S
− 0.1 V), dc, T
OPR
−0.3 +0.3 %
Output Voltage Range
4, 5
R
L
= 25 kΩ, differential Input (V) = 0 V, T
OPR
Pin 3 (A1 output) driving Pin 4 (A2 input)
AD8208WBR, AD8208WBRM 0.075 V
S
− 0.1 V
AD8208WHR, AD8208WHRM 0.1 V
S
− 0.12 V
Output Voltage Range
6
Pin 4 (A2 input) driven with external source
AD8208WBR, AD8208WBRM 0.075 V
S
− 0.1 V
AD8208WHR, AD8208WHRM 0.1 V
S
− 0.12 V
OPR
Output Resistance R
L
= 1 kΩ, frequency = dc 2 Ω
DYNAMIC RESPONSE
IN
OUT
Slew Rate V
IN
= 0.28 V, V
OUT
= 4 V step 1 V/µs
NOISE
0.1 Hz to 10 Hz 20 µV p-p
Spectral Density, 1 kHz (RTI) 500 nV/√Hz
POWER SUPPLY
Operating Range 4.5 5.5 V
Quiescent Current Typical, T
A
1.6 mA
Quiescent Current vs. Temperature V
OUT
= 0.1 V dc, V
S
= 5 V, T
OPR
AD8208WBR, AD8208WBRM 2.7 mA
AD8208WHR, AD8208WHRM 3.0 mA
S
OPR
