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AD8209
(Rev.:Rev0)

High Voltage, Precision Difference Amplifier

Analog Devices 

AD8209

SPECIFICATIONS

TOPR = −40°C to +125°C, TA = 25°C, VS = 5 V, RL = 25 kΩ (RL is the output load resistor), unless otherwise noted.

Table 1.

Parameter

SYSTEM GAIN

Initial

Error vs. Temperature

Gain Drift

VOLTAGE OFFSET

Initial Input Offset (Referred to Input [RTI])

Input Offset (RTI) Over Temperature

Voltage Offset vs. Temperature

INPUT

Input Impedance

Differential

Common Mode

VCM (Continuous)

CMRR2

PREAMPLIFIER (A1)

Gain

Gain Error

Output Voltage Range

Output Resistance

OUTPUT BUFFER (A2)

Gain

Gain Error

Output Voltage Range4

Input Bias Current

Output Resistance

DYNAMIC RESPONSE

System Bandwidth

Slew Rate

NOISE

0.1 Hz to 10 Hz

Spectral Density, 1 kHz (RTI)

POWER SUPPLY

Operating Range

Quiescent Current

Quiescent Current vs. Temperature

PSRR

TEMPERATURE RANGE

For Specified Performance at TOPR

Test Conditions1

0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR

TOPR

VCM = 0.15 V, TA

VCM = 0 V, TOPR

VCM = 0 V, TOPR

VCM = −2 V to +45 V, dc

f = dc to 10 kHz,3 TOPR

0.05 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR

0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR

RL = 25 kΩ, differential Input (V) = 0 V, TOPR

TOPR

RL = 1 kΩ, frequency = dc

VIN = 0.01 V p-p, VOUT = 0.14 V p-p

VIN = 0.28 V, VOUT = 4 V step

Typical, TA

VOUT = 0.1 V dc, VS = 5 V, TOPR

VS = 4.5 V to 5.5 V, TOPR

Min

Typ

Max

14

±0.3

0

−20

±2

±4

−20

+20

Unit

V/V

%

ppm/°C

mV

mV

μV/°C

360

400

180

200

−2

80

100

80

7

−0.3

0.05

97

100

2

−0.3

0.075

2

80

1

20

500

4.5

1.6

66

80

−40

440

kΩ

220

kΩ

+45

V

dB

dB

V/V

+0.3

%

VS − 0.1 V

103

kΩ

V/V

+0.3

%

VS − 0.1 V

50

nA

Ω

kHz

V/μs

μV p-p

nV/√Hz

5.5

V

mA

2.7

mA

dB

+125

°C

1 VCM = input common-mode voltage.

2 Source imbalance < 2 Ω.

3 The AD8209 preamplifier exceeds 80 dB CMRR at 10 kHz. However, because the output is available only by way of the 100 kΩ resistor, even a small amount of pin-to-

pin capacitance between the IN pins and the A1 and A2 pins might couple an input common-mode signal larger than the greatly attenuated preamplifier output. The

effect of pin-to-pin coupling can be neglected in all applications by using a filter capacitor from Pin 3 to GND.

4 The output voltage range of the AD8209 varies depending on the load resistance and temperature. For additional information on this specification, refer to Figure 12

and Figure 13.

Rev. 0 | Page 3 of 16

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