DIO2240

Version 1.2, Jan 2026

www.dioo.com

© 2026 Dioo Microcircuits Co., Ltd. Jiangsu

13

common-mode voltage rejection, gain error, and nonlinearity error. For the DIO2240, an additional error

source (referring to RVRR) is also included in the total error value. RVRR (reference voltage rejection ratio)

refers to the amount of error induced by applying a reference voltage to the DIO2240 that deviates from the

mid-point of the device supply voltage.

Here are the equations to calculate the error terms.

Table 2. Equations of error terms

Symbol

Term

Equation

VOS

Initial input offset voltage

/

VOS_CM

Added input offset voltage as result of common-mode

voltage

|

V

12

-

V

|

×

)

20

CMRR_dB

10(

1

CM

VOS_REF

Added input offset voltage as result of reference voltage

|

V

-

/2

V

|

×

RVRR

REF

S

VOS_Total

Total input offset voltage

2

OS_REF

2

OS_CM

2

OS

)

(V

)

(V

+

)

(V

+

Error_VOS

Error because of input offset voltage

100

×

V

V

SENSE

OS_Total

Error_Gain

Gain error

/

Error_Lin

Nonlinearity error

/

Total error

2

2

2

OS

)

(Error_Lin

+

n)

(Error_Gai

)

(Error_V

+