OS

EXT

2

2

2

2

RSS

I

PSRR

CMRR

B

S

NL

e

(%)

e

e

e

e

e

e

OS

EXT

worst

I

PSRR

CMRR

B

S

NL

e

(%)

e

e

e

e

e

e

EXT

EXT

B

IN

B

G

e

(%)

I

CM

CMRR

IN

CMRR * V

e

(%)

I

OS

OS

I

IN

I

e

(%)

I

21

TMCS1101

www.ti.com

SBOS825 – SEPTEMBER 2019

Product Folder Links: TMCS1101

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

Application Information (continued)

10.1.1.1 Room Temperature Error Calculations

For room-temperature total-error calculations, specifications across temperature and drift are ignored. As an

excursion of 600 V to calculate operating-point-specific parameters. Consider a measurement error due to an

external magnetic field of 30 µT, roughly the Earth's magnetic field strength. The full-scale current range of the

device in specified conditions is slightly greater than 15 A; therefore, calculate error at both 15 A and 7.5 A to

highlight error dependence on the input-current level. Table 1 shows the individual error components, and the

worst-case and RSS total error calculations at room temperature under the conditions specified. Relative to other

errors, the additional error from CMRR and PSRR are negligible, and can typically be ignored for total error

calculations.

Table 1. Total Error Calculation: Room Temperature Example

ERROR

COMPONENT

SYMBOL

EQUATION

% TOTAL ERROR

% TOTAL ERROR

Input offset error

0.5%

1.0%

CMRR error

0.00%

0.01%

External Field error

0.17%

0.33%

Sensitivity error

Specified in Electrical Characteristics

0.5%

0.5%

Nonlinearity error

Specified in Electrical Characteristics

0.1%

0.1%

Worst-case total error

1.3%

2%

RSS total error

0.74%

1.19%