AD8209AWBRMZ-R7 datasheet(3/15 Pages) AD

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Data Sheet

AD8209A

Rev. A | Page 3 of 15

SPECIFICATIONS

Operating temperature (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

Test Conditions/Comments

Min

Typ

Max

Unit

SYSTEM GAIN

Initial

V/V

Error vs. Temperature

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

±0.15

Gain Drift

TOPR

−5

±15

ppm/°C

VOLTAGE OFFSET

Initial Input Offset (Referred to

Input (RTI))

Input common-mode voltage (VCM) = 0.15 V, at TA

±1

±2

Input Offset (RTI) over

Temperature

VCM = 0 V, TOPR

±4

Voltage Offset vs. Temperature

VCM = 0 V, TOPR

−20

+20

µV/°C

INPUT

Input Impedance

Differential

360

400

440

kΩ

Common Mode

180

200

220

kΩ

VCM (Continuous)

−2

+50

CMRR1

VCM = −2 V to +50 V, dc

100

f = dc to 10 kHz,2 TOPR

PREAMPLIFIER (A1)

Gain

V/V

Gain Error

0.0375 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR

−0.3

+0.3

Output Voltage Range

0.025

VS − 0.1

Output Resistance

100

103

kΩ

OUTPUT BUFFER (A2)

Gain

V/V

Gain Error

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

−0.3

+0.3

Output Voltage Range3, 4

RL = 25 kΩ, differential input = 0 V, TOPR; Pin 3 (A1 output)

driving Pin 4 (A2 input)

0.05

VS − 0.1

Output Voltage Range5

Pin 4 (A2 input) driven with an external source

0.05

VS − 0.1

Input Bias Current

TOPR

Output Resistance

RL = 1 kΩ, frequency = dc

DYNAMIC RESPONSE

System Bandwidth

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

100

kHz

Slew Rate

VIN = 0.28 V, VOUT = 4 V step

V/µs

NOISE

0.1 Hz to 10 Hz

µV p-p

Spectral Density, 1 kHz (RTI)

500

nV/√Hz

POWER SUPPLY

Operating Range

4.5

5.5

Quiescent Current

Typical at TA

1.6

Quiescent Current vs. Temperature

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

2.7

Power Supply Rejection Ratio

(PSRR)

VS = 4.5 V to 5.5 V, TOPR

TEMPERATURE RANGE

For specified performance at TOPR

−40

+125

°C

Source imbalance < 2 Ω.

The AD8209A preamplifier exceeds 80 dB CMRR at 10 kHz. However, because the output is available only via the 100 kΩ resistor, even a small amount of pin to pin

capacitance between the ±IN pins and the A1 and A2 pins can 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.

The output voltage range of the AD8209A varies depending on the load resistance and temperature. For additional information on this specification, refer to Figure 12

and Figure 13.

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 is used for testing.

The output voltage range of A2 assumes Pin 4 (A2 input) is driven with an external voltage source. A 25 kΩ load resistor is used for testing.

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