Data Sheet AD8203
Rev. D | Page 3 of 20
SPECIFICATIONS
SINGLE SUPPLY
T
OPR
= operating temperature range, V
S
= 5 V, unless otherwise noted, RTI = referred to input, VCM = common-mode voltage.
Table 1.
AD8203 SOIC AD8203 MSOP
SYSTEM GAIN
Error vs. Temperature 0.04 ≤ V
OUT
≤ 4.8 V dc, T
OPR
±0.3 ±0.3 %
Gain Drift T
OPR
±20 ±20 ppm/°C
VOLTAGE OFFSET
Initial Input Offset (RTI), T
OPR
±2 ±2
Offset vs. Temperature V
CM
= 0V, T
OPR
±10 ±15 µV/°C
INPUT
Input Impedance
Differential 260 320 380 260 320 380 kΩ
Common Mode 130 160 190 130 160 190 kΩ
CMV Continuous −6 +30 −6 +30 V
1
CM
f = dc to 1 kHz 82 82 dB
f = 10 kHz
2
80 80 dB
PREAMPLIFIER
Gain 7 7 V/V
Gain Error ±0.3 ±0.3 %
Output Resistance 97 100 103 97 100 103 kΩ
Gain Error 0.04 ≤ V
OUT
≤ 4.8 V dc, T
OPR
±0.3 ±0.3 %
Output Voltage Range
3
0.04 4.8 0.04 4.8 V
Input Bias Current 40 40 nA
Output Resistance 2 2 Ω
DYNAMIC RESPONSE
System Bandwidth V
IN
= 0.01 V p-p, V
OUT
= 0.14 V p-p 40 60 40 60 kHz
Slew Rate V
IN
= 0.28 V, V
OUT
= 4 V step 0.33 0.33 V/µs
NOISE
0.1 Hz to 10 Hz 10 10 µV p-p
Spectral Density, 1 kHz (RTI)
POWER SUPPLY
Operating Range 3.5 12 3.5 12 V
Quiescent Current vs.
Temperature
V
O
= 0.1 V dc 0.25 1.0 0.25 1.0 mA
PSRR V
S
= 3.5 V to 12 V 75 83 75 83 dB
TEMPERATURE RANGE
For Specified Performance −40 +125 −40 +125 °C
1
Source imbalance <2 Ω.
2
The AD8203 preamplifier exceeds 80 dB CMRR at 10 kHz. However, since the signal is available only by way of a 100 kΩ resistor, even the small amount of pin-to-pin
capacitance between Pin 1, Pin 8 and Pin 3, Pin 4 may couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin-
to-pin coupling may be neglected in all applications by using filter capacitors at Node 3.
3
The output voltage range of A2 assumes that Pin 3 (A1 output) and Pin 4 (A2 Input) are shorted together. A 25 kΩ load resistor used for testing.
