INA2227 datasheet(5/43 Pages) TI2

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5.5 Electrical Characteristics

at TA = 25°C, VS = 3.3V, VSENSE = VIN+ - VIN- = 0mV, VIN- = VBUS = 12V, for all channels (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT

CMRR

Common-mode rejection

VCM = –0.3V to 48V, TA = –40°C to 125°C

110

120

Shunt voltage input range

ADCRANGE = 0

–81.9175

81.92

ADCRANGE = 1

–20.4794

20.48

Vos

Shunt offset voltage

VCM = 12 V

±10

±75

µV

dVos/dT

Shunt offset voltage drift

TA = –40°C to 125°C

±0.1

±0.5

µV/°C

Vos_b

IN- bus offset Voltage

±5

±30

dVos_b/dT IN- bus offset voltage drift

TA = –40°C to 125°C

±10

±30

µV/°C

PSRRSH

Power supply rejection ratio

(Current measurements)

VS = 1.7V to 5.5V, TA = –40°C to 125°C

±0.2

±2.5

µV/V

PSRRBUS

Power supply rejection ratio

(Voltage measurements)

VS = 1.7V to 5.5V, TA = –40°C to 125°C

±0.5

±2.5

mV/V

ZIN-

IN- input impedance

Bus Voltage Measurement Mode

1.14

MΩ

Input bias current

IN+, IN-, Current Measurement Mode

0.1

DC ACCURACY

RDIFF

Differential Input Impedance

(IN+ to IN-)

VIN+ - VIN- < 82mV

140

kΩ

ADC Resolution

TA = –40°C to 125°C

Bits

1 LSB step size

Shunt Voltage, ADCRANGE = 0

2.5

µV

Shunt Voltage, ADCRANGE = 1

625

Bus Voltage

1.6

ADC Conversion-time

(TA = –40°C to 125°C)

CT bit = 000

140

µs

CT bit = 001

204

µs

CT bit = 010

332

µs

CT bit = 011

588

µs

CT bit = 100

1.100

CT bit = 101

2.116

CT bit = 110

4.156

CT bit = 111

8.244

Internal Oscillator Frequency

TA = +25°C

500

kHz

Internal Oscillator Tolerance

TA = +25°C

0.5

TA = –40°C to +125°C

GSERR

Shunt voltage gain error

±0.04

±0.5

GS_DRFT

Shunt voltage gain error drift

TA = –40°C to +125°C

50 ppm/°C

GBERR

VIN- voltage gain error

±0.05

±0.5

GB_DRFT

VIN- voltage gain error drift

TA = –40°C to +125°C

50 ppm/°C

PTME

Power total measurement error

At full scale voltage and current

±0.04

±1

ETME

Energy total measurement error

At full scale voltage and current

±0.3

±1.5

INL

Integral Non-Linearity

ADCRANGE = 0, Linear best fit,TA = –40°C to

+125°C

±2

±6

DNL

Differential Non-Linearity

±0.1

LSB

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INA2227

SBOSAL5 – JUNE 2025

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