INA231AIYFDR datasheet(5/44 Pages) TI1

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INA231

www.ti.com

SBOS644B – FEBRUARY 2013 – REVISED AUGUST 2017

Product Folder Links: INA231

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(1)

RTI = Referred-to-input.

(2)

Although the input range is 28 V, the full-scale range of the ADC scaling is 40.96 V. Do not apply more than 28 V. See the Basic

Analog-to-Digital Converter (ADC) Functions section for more details

(3)

Input leakage is positive (current flowing into the pin) for the conditions shown at the top of this table. Negative leakage currents can

occur under different input conditions.

(4)

SMBus timeout in the INA231 resets the interface any time SCL is low for more than 28 ms.

7.5 Electrical Characteristics

at TA = 25°C, VS = 3.3 V, VIN+ = 12 V, VSENSE = (VIN+ – VIN–) = 0 mV, and VBUS = 12 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SHUNT INPUT

Shunt voltage input

–81.92

81.9175

CMR

Common-mode rejection

VIN+ = 0 V to 28 V

100

120

VOS

Shunt offset voltage, RTI(1)

±10

±50

μV

TA = –40°C to +125°C

0.1

0.5

μV/°C

PSRR

vs power supply

VS = 2.7 V to 5.5 V

μV/V

BUS INPUT

Bus voltage input range(2)

VOS

Bus offset voltage, RTI(1)

±5

±30

TA = –40°C to +125°C

μV/°C

PSRR

vs power supply

mV/V

BUS pin input impedance

830

kΩ

INPUT

IIN+, IIN-

Input bias current

μA

Input leakage(3)

(VIN+) + (VIN–), Power-Down mode

0.1

0.5

μA

DC ACCURACY

ADC native resolution

Bits

1 LSB step size

Shunt voltage

2.5

μV

Bus voltage

1.25

Shunt voltage gain error

0.2%

0.5%

TA = –40°C to +125°C

ppm/°C

Bus voltage gain error

0.2%

0.5%

TA = –40°C to +125°C

ppm/°C

Differential nonlinearity

±0.1

LSB

ADC conversion time

CT bit = 000

140

154

μs

CT bit = 001

204

224

μs

CT bit = 010

332

365

μs

CT bit = 011

588

646

μs

CT bit = 100

1.1

1.21

CT bit = 101

2.116

2.328

CT bit = 110

4.156

4.572

CT bit = 111

8.244

9.068

SMBus

SMBus timeout(4)

DIGITAL INPUT/OUTPUT

Input capacitance

Leakage input current

≤ VIN ≤ VS

0.5

μA

VIH

High-level input voltage

1.4

VIL

Low-level input voltage

–0.5

0.4

VOL

Low-level output voltage (SDA, ALERT) IOL = 3 mA

0.4

Hysteresis

500

POWER SUPPLY

Quiescent current

330

420

μA

Power-Down mode

μA

Power-on reset threshold

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