INA781 datasheet(5/40 Pages) TI1

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6.5 Electrical Characteristics

at TA = 25 °C, VS = 3.3 V, ISENSE = 0 A, VCM = VIN– = VBUS= 48 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT

CMRR

Common-mode rejection

–0.1 V ≤ VCM ≤ 85 V, TA = –40°C to +125°C

±15

±100

µA/V

Ios

Input offset current

TCT > 280 µs

±1

±5.5

dVos/dT Input offset current drift

TA = –40°C to +125°C

±5

±25 µA/°C

PSRR

Input offset current vs power supply VS = 2.7 V to 5.5 V, TA = –40°C to +125°C

±0.2

±6

mA/V

Vos_bus VBUS offset voltage

±1

±3.5

dVos/dT VBUS offset voltage drift

TA = –40°C to +125°C

±4

±20 µV/°C

PSRR

VBUS offset voltage vs power supply VS = 2.7 V to 5.5 V

±1.1

mV/V

DC ACCURACY

GSERR

System current sense gain error

VCM = 24 V, ISENSE = ±50 A, TA = 25°C

±0.1

±0.5

GS_DRFT

System current sense gain error

drift

–40°C ≤ TA ≤ 125°C

±25

ppm/°C

GBERR

VBUS voltage gain error

VBUS = 0 V to 85 V, TA = 25°C

±0.01

±0.1

VBUS = 0 V to 85 V,

–40°C ≤ TA ≤ 125°C

±0.025

±0.3

GB_DRFT VBUS voltage gain error drift

–40°C ≤ TA ≤ +125°C

±20 ppm/°C

ZBUS

VBUS pin input impedance

Device enabled with active conversions

MΩ

PTME

Power total measurement error

(TME)

TA = 25°C, at full scale

±0.6

ETME

Energy and charge TME

TA = 25°C, at full scale

±1.1

ADC resolution

Bits

1 LSB step size

Current

150

µA

Bus voltage

195.3125

µV

Temperature

7.8125

m°C

Power

480

µW

Energy

7.68

Charge

150

µC

tCT

ADC conversion-time(1)

Conversion time field = 0h

µs

Conversion time field = 1h

Conversion time field = 2h

150

Conversion time field = 3h

280

Conversion time field = 4h

540

Conversion time field = 5h

1052

Conversion time field = 6h

2074

Conversion time field = 7h

4120

INL

Integral Non-Linearity

Internal ADC

±2

DNL

Differential Non-Linearity

Internal ADC

0.2

LSB

CLOCK SOURCE

FOSC

Internal oscillator frequency

MHz

OSCTOL

Internal oscillator frequency

tolerance

TA = 25°C

±0.5

TA = –40°C to +125°C

±1

TEMPERATURE SENSOR

Measurement range

–40

+165

°C

Temperature accuracy

TA = 25°C

±0.15

±1.5

°C

TA= –40°C to +125°C

±0.2

±2.5

°C

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INA781

SBOSAC0 – JULY 2023

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