5

INA233

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SBOS790 – APRIL 2017

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(1)

Although the input range is 36 V, the full-scale range of the ADC scaling is 40.96 V; see the High-Accuracy Analog-to-Digital Convertor

(ADC) section. Do not apply more than 36 V.

(2)

RTI = Referred-to-input.

(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 INA233 resets the interface whenever SCL is low for more than 28 ms.

6.5 Electrical Characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT

Shunt voltage input range

–81.92

81.9175

mV

0

36

V

CMRR

Common-mode rejection ratio

0 V

126

140

dB

Shunt voltage

±2.5

±10

µV

Bus voltage

±1.25

±7.5

mV

Shunt voltage, –40°C

0.02

0.1

µV/°C

Bus voltage, –40°C

10

40

PSRR

Shunt voltage, 2.7 V

1

µV/V

Bus voltage

0.5

mV/V

8

μA

VBUS input impedance

830

kΩ

(IN+) + (IN–),

power-down mode

0.1

0.5

µA

DC ACCURACY

ADC native resolution

16

Bits

1-LSB step size

Shunt voltage

2.5

μV

Bus voltage

1.25

mV

Shunt voltage gain error

0.02%

0.1%

Shunt voltage gain error vs

temperature

–40°C

5

25

ppm/°C

Bus voltage gain error

0.02%

0.1%

Bus voltage gain error vs

temperature

–40°C

10

50

ppm/°C

Power gain error

to 80 mV

0.05%

0.2%

Power gain error vs temperature

–40°C

10

50

ppm/°C

DNL

Differential nonlinearity

±0.1

LSB

ADC conversion time

CT bit = 000

140

154

µs

CT bit = 001

204

224

CT bit = 010

332

365

CT bit = 011

588

646

CT bit = 100

1.1

1.21

ms

CT bit = 101

2.116

2.328

CT bit = 110

4.156

4.572

CT bit = 111

8.244

9.068

SMBus

28

35

ms