Data Sheet
AD8203
Rev. D | Page 3 of 20
SPECIFICATIONS
SINGLE SUPPLY
TOPR = operating temperature range, VS = 5 V, unless otherwise noted, RTI = referred to input, VCM = common-mode voltage.
Table 1.
AD8203 SOIC
AD8203 MSOP
Parameter
Conditions
Min
Typ
Max
Min
Typ
Max
Unit
SYSTEM GAIN
Initial
14
V/V
Error vs. Temperature
0.04 ≤ VOUT ≤ 4.8 V dc, TOPR
±0.3
%
Gain Drift
TOPR
±20
ppm/°C
VOLTAGE OFFSET
Initial Input Offset (RTI), TOPR
±2
Offset vs. Temperature
VCM = 0V, TOPR
±10
±15
V/°C
INPUT
Input Impedance
Differential
260
320
380
260
320
380
k
Common Mode
130
160
190
130
160
190
k
CMV
Continuous
6
+30
6
+30
V
VCM = 6 V to +30 V
f = dc to 1 kHz
82
dB
80
dB
PREAMPLIFIER
Gain
7
V/V
Gain Error
±0.3
%
Output Voltage Range
0.02
4.8
0.02
4.8
V
Output Resistance
97
100
103
97
100
103
k
OUTPUT BUFFER
Gain
2
V/V
Gain Error
0.04 ≤ VOUT ≤ 4.8 V dc, TOPR
±0.3
%
0.04
4.8
0.04
4.8
V
Input Bias Current
40
nA
Output Resistance
2
DYNAMIC RESPONSE
System Bandwidth
VIN = 0.01 V p-p, VOUT = 0.14 V p-p
40
60
40
60
kHz
Slew Rate
VIN = 0.28 V, VOUT = 4 V step
0.33
V/s
NOISE
0.1 Hz to 10 Hz
10
V p-p
Spectral Density, 1 kHz (RTI)
300
nV/√Hz
POWER SUPPLY
Operating Range
3.5
12
3.5
12
V
Quiescent Current vs.
Temperature
VO = 0.1 V dc
0.25
1.0
0.25
1.0
mA
PSRR
VS = 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 .
2
The AD8203 preamplifier exceeds 80 dB CMRR at 10 kHz. However, since the signal is available only by way of a 100 k 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 k load resistor used for testing.