appear at the ADC input. To prevent violation of the ADC input range specifications, additional protection such as

a TVS diode is recommended.

8.2.1.3 Output Pullup Resistor in Multiplexer Configuration

The INA151 can operate in a stacked configuration sharing common output. The combined output impedance

ROUTDIS of the disabled devices is determined by:

ROUTDIS=ROUT151N

(7)

wheras

• ROUT151= 562.5kΩ (A), 395.83kΩ (B), 312.5kΩ (C ), 187.5kΩ (D)

• N is number of stacked devices of INA151

The output resistance ROUTDIS contributes additional loading to the the active output amplifier. To minimize the

loading use a pull-up resistor connected to VS+. The pull-up resistance R1 can be calculated by:

R1= ROUTDIS×VS+ −VOUT

VOUT−VS−

(8)

8.2.1.4 Application Curves

The following graphs illustrate the total system error in Figure 8-2 for CELL1 (VCM=0V) and CELL16

(VCM= 67.5V), showing both adjusted and unadjusted error measurements. The adjusted error data reflects

performance after calibrating out the reference voltage error of the ADC.

Differential Input Voltage (V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

-400

-200

0

200

400

600

800

1000

1200

1400

1600

Unadjusted Error

Adjusted Error

Figure 8-4. System Error (ppm) vs INA151B

Differential Input Voltage for CELL1

Differential Input Voltage (V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

-400

-200

0

200

400

600

800

1000

1200

1400

Adjusted Error

Unadjusted Error

Figure 8-5. System Error (ppm) vs INA151B

Differential Input Voltage for CELL16

8.3 Power Supply Recommendations

The nominal performance of the INA151 is specified with a supply voltage of ±5V and midsupply reference

voltage. The device also operates using power supplies from ±1.35V (2.7V) to ±10V (20V) and non-

midsupply reference voltages with good performance. Many specifications apply from –40°C to 125°C.

Electrical Characteristics presents parameters that can exhibit significant variance due to operating voltage or

temperature.

TI highly recommends to add low-ESR ceramic bypass capacitors (CBYP) between each supply pin and ground.

Only one CBYP is sufficient for single supply operation. Place the CBYP as close to the device as possible to

reduce coupling errors from noisy or high-impedance power supplies. Please verify that the power supply trace

routes through CBYP before reaching the amplifier power supply terminals. For more information, see Layout

Guidelines.

www.ti.com

INA151

SLVSIL6C – JANUARY 2026 – REVISED APRIL 2026

Copyright © 2026 Texas Instruments Incorporated

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Product Folder Links: INA151