8.3.1.1 Gain Drift

The best gain drift of 5 ppm/

In this case, gain drift is limited by the slight mismatch of the temperature coefficient of the integrated 50-kΩ

At gains greater than 1 V/V, gain drift increases as a result of the individual drift of the 50-kΩ resistors in the

the internal feedback resistors significantly improves the overall temperature stability of applications using gains

greater than 1 V/V over alternate options.

8.3.2 Input Common-Mode Voltage Range

The linear input voltage range of the INA823 input circuitry extends within 2 V of power supplies and maintains

excellent common-mode rejection throughout this range. The common-mode range for the most common

operating conditions are shown in Input Common-Mode Voltage vs Output Voltage. The common-mode range for

other operating conditions is best calculated using the Analog Engineers Calculator.

Output Voltage (V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

VREF = 0 V

VREF = 2.5 V

Figure 8-2. Input Common-Mode Voltage

vs Output Voltage

Output Voltage (V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

VREF = 0 V

VREF = 2.5 V

Figure 8-3. Input Common-Mode Voltage

vs Output Voltage

Figure 8-4. Input Common-Mode Voltage

vs Output Voltage

Figure 8-5. Input Common-Mode Voltage

vs Output Voltage

A single-supply instrumentation amplifier has special design considerations. To achieve a common-mode

range that extends to single-supply ground, the INA823 employs a current-feedback topology with PNP input

INA823

SBOSA75A – JULY 2021 – REVISED JULY 2021

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