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INA240 Datasheet(PDF) 17 Page - Texas Instruments

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Part # INA240
Description  Automotive, Wide Common-Mode Range, High- and Low-Side, Bidirectional, Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection
PDF  34 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

INA240 Datasheet(HTML) 17 Page - Texas Instruments

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(Error_V ) +(Error_Gain) +(Error_Lin)
OS
2
2
2
V
V
OS_Total
SENSE
´ 100
(V ) +(V
) +(V
)
OS
OS_CM
OS_REF
2
2
2
´ (V
12V)
-
CM
1
CMRR_dB
20
(
10
(Error_V ) +(Error_Gain) +(Error_Lin)
OS
2
2
2
V
V
OS_Total
SENSE
´ 100
(V ) +(V
) +(V
)
OS
OS_CM
OS_REF
2
2
2
´ (V
12V)
-
CM
1
CMRR_dB
20
(
10
17
INA240-Q1
www.ti.com
SBOS808A – AUGUST 2016 – REVISED DECEMBER 2016
Product Folder Links: INA240-Q1
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Device Functional Modes (continued)
(1)
The data for Table 2 was taken with the INA240A4-Q1, VS = 5 V, VCM = 12 V, VREF1 = VREF2 = VS / 2, and VSENSE = 10 mV.
9.4.4.2 Reference Voltage Rejection Ratio Error
Reference voltage rejection ratio refers to the amount of error induced by applying a reference voltage to the
INA240-Q1 that deviates from the mid-point of the device supply voltage.
9.4.4.2.1
Total Error Example 1
Table 2. Total Error Calculation: Example 1(1)
TERM
SYMBOL
EQUATION
TYPICAL VALUE
Initial input offset voltage
VOS
—
5 µV
Added input offset voltage
because of common-
mode voltage
VOS_CM
0 µV
Added input offset voltage
because of reference
voltage
VOS_REF
RVRR × |VS / 2 – VREF|
0 µV
Total input offset voltage
VOS_Total
5 µV
Error from input offset
voltage
Error_VOS
0.05%
Gain error
Error_Gain
—
0.05%
Nonlinearity error
Error_Lin
—
0.01%
Total error
—
0.07%
(1)
The data for Table 3 was taken with the INA240A4-Q1, VS = 5 V, VCM = 60 V, VREF1 = VREF2 = 0 V, and VSENSE = 10 mV.
9.4.4.2.2
Total Error Example 2
Table 3. Total Error Calculation: Example 2(1)
TERM
SYMBOL
EQUATION
TYPICAL VALUE
Initial input offset voltage
VOS
—
5 µV
Added input offset voltage
because of common-
mode voltage
VOS_CM
12.1 µV
Added input offset voltage
because of reference
voltage
VOS_REF
RVRR × |VS / 2 – VREF|
5 µV
Total input offset voltage
VOS_Total
14 µV
Error from input offset
voltage
Error_VOS
0.14%
Gain error
Error_Gain
—
0.05%
Nonlinearity error
Error_Lin
—
0.01%
Total error
—
0.15%



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