6.5 Electrical Characteristics

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT

CMRR

Common-mode rejection

VCM = –0.3 V to 48 V, TA = –40°C to

125°C

120

150

dB

Shunt voltage input range

ADCRANGE = 0

–81.9175

81.92

mV

ADCRANGE = 1

–20.4794

20.48

mV

Vos

Shunt offset voltage

VCM = 12 V

±50

µV

dVos/dT

Shunt offset voltage drift

TA = –40°C to +125°C

±0.1

µV/°C

Vos_b

IN– bus offset Voltage

±10

mV

dVos_b/dT

IN– bus offset voltage drift

TA = –40°C to +125°C

±50

µV/°C

PSRRSHUNT

Power supply rejection ratio

(Current measurements)

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

±10

µV/V

PSRRBUS

Power supply rejection ratio

(Voltage measurements)

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

VIN– = 50 mV

±5

mV/V

ZIN–

IN– input impedance

Bus Voltage Measurement Mode

1.05

MΩ

IB_SHDWN

Input Leakage

IN+, IN–, Shutdown Mode

0.1

5

nA

IB

Input bias current

IN+, IN–, Current Measurement Mode

0.1

10

nA

DC ACCURACY

RDIFF

Differential Input Impedance

(IN+ to IN–)

Shunt or Current Measurement

Modes, VIN+ – VIN– < 82 mV

140

kΩ

ADC Resolution

TA = –40°C to 125°C

16

Bits

1 LSB step size

Shunt Voltage, ADCRANGE = 0

2.5

µV

Shunt Voltage, ADCRANGE = 1

625

nV

Bus Voltage

1.6

mV

ADC Conversion-time

(TA = –40°C to 125°C)

CT bit = 000

133

140

147

µs

CT bit = 001

194

204

214

µs

CT bit = 010

315

332

349

µs

CT bit = 011

559

588

617

µs

CT bit = 100

1.045

1.100

1.155

ms

CT bit = 101

2.01

2.116

2.222

ms

CT bit = 110

3.948

4.156

4.364

ms

CT bit = 111

7.832

8.244

8.656

ms

GSERR

Shunt voltage gain error

±0.3

%

GS_DRFT

Shunt voltage gain error drift

TA = –40°C to +125°C

30 ppm/°C

GBERR

VIN– voltage gain error

±0.5

%

GB_DRFT

VIN– voltage gain error drift

TA = –40°C to +125°C

50 ppm/°C

INL

Integral Non-Linearity

±2

m%

DNL

Differential Non-Linearity

±0.1

LSB

POWER SUPPLY

IQ

Quiescent current

VSENSE = 0 mV

300

380

µA

IQ vs temperature, TA = –40°C to +125°C

500

µA

Shutdown

2.2

3

µA

VPOR

Power-on reset threshold

VS falling

0.95

V

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INA232

SBOSAA2 – DECEMBER 2022

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