INA191 datasheet(4/42 Pages) TI2

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IN+1

IN-1

EN1

IN+2

EN2

IN-2

GND

REF1

OUT1

OUT2

REF2

Figure 5-2. INA2191 YBJ Package 12-Pin DSBGA Top View

Table 5-2. Pin Functions (INA2191)

TYPE

DESCRIPTION

NAME

NO.

ENABLE1

Digital input

Enable pin for output 1. When this pin is driven to VS, channel 1 is on and functions as a

current sense amplifier. When both enable pins are driven to GND, the device is off and the

supply current is reduced. This pin must be driven externally, or connected to VS if not used.

ENABLE2

Digital input

Enable pin for output 2. When this pin is driven to VS, channel 2 is on and functions as a

current sense amplifier. When both enable pins are driven to GND, the device is off and the

supply current is reduced. This pin must be driven externally, or connected to VS if not used.

GND

Analog

Ground.

IN+1

Analog input

Current-shunt monitor positive input for channel 1. For high-side applications, connect this

pin to the bus voltage side of the sense resistor. For low-side applications, connect this pin

to the load side of the sense resistor.

IN+2

Analog input

Current-shunt monitor positive input for channel 2. For high-side applications, connect this

pin to the bus voltage side of the sense resistor. For low-side applications, connect this pin

to the load side of the sense resistor.

IN–1

Analog input

Current-shunt monitor negative input for channel 1. For high-side applications, connect this

pin to the load side of the sense resistor. For low-side applications, connect this pin to the

ground side of the sense resistor.

IN–2

Analog input

Current-shunt monitor negative input for channel 2. For high-side applications, connect this

pin to the load side of the sense resistor. For low-side applications, connect this pin to the

ground side of the sense resistor.

OUT1

Analog output

This pin provides an analog voltage output that is the amplified voltage difference from the

IN+1 to the IN–1 pins, and is offset by the voltage applied to the REF1 pin.

OUT2

Analog output

This pin provides an analog voltage output that is the amplified voltage difference from the

IN+2 to the IN–2 pins, and is offset by the voltage applied to the REF2 pin.

REF1

Analog input

Reference input for channel 1. Enables bidirectional current sensing for channel 1 with an

externally applied voltage.

REF2

Analog input

Reference input for channel 2. Enables bidirectional current sensing for channel 2 with an

externally applied voltage.

Analog

Power supply, 1.7 V to 5.5 V.

INA191, INA2191

SLYS020C – FEBRUARY 2019 – REVISED AUGUST 2021

www.ti.com

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