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TMCS1101 Datasheet(PDF) 32 Page - Texas Instruments

Part # TMCS1101
Description  TMCS1101 1.5% Precision, Basic Isolation Hall-Effect Current Sensor With 짹600-V Working Voltage
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TMCS1101 Datasheet(HTML) 32 Page - Texas Instruments

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background image
OS
EXT
2
2
2
2
RSS
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
Input Current (A)
0
5
10
15
20
25
0
1
2
3
4
5
6
7
8
9
10
D008
RSS Max Error, 25°C
566 0D[ (UURU ±
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566 0D[ (UURU ±
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32
TMCS1101
SBOS825A – SEPTEMBER 2019 – REVISED MAY 2020
www.ti.com
Product Folder Links: TMCS1101
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Application Information (continued)
Figure 45. RSS Error vs Input Current
10.1.1.1 Room Temperature Error Calculations
For room-temperature total-error calculations, specifications across temperature and drift are ignored. As an
example, consider a TMCS1101A1B with a supply voltage (VS) of 3.3 V and a worst-case common-mode
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 33 A; therefore, calculate error at both 25 A and 12.5 A to
highlight error dependence on the input-current level. Table 1 shows the individual error components and RSS
maximum total error calculations at room temperature under the conditions specified. Relative to other errors, the
additional error from CMRR is negligible, and can typically be ignored for total error calculations.
Table 1. Total Error Calculation: Room Temperature Example
ERROR
COMPONENT
SYMBOL
EQUATION
% TOTAL ERROR
AT IIN = 25 A
% TOTAL ERROR
AT IIN = 12.5 A
Input offset error
eIos
0.36%
0.72%
CMRR error
eCMRR
0.01%
0.02%
External Field error
eBext
0.41%
0.82%
Sensitivity error
eS
Specified in Electrical Characteristics
0.8%
0.8%
Nonlinearity error
eNL
Specified in Electrical Characteristics
0.05%
0.05%
RSS total error
eRSS
1.12%
1.77%
10.1.1.2 Full Temperature Range Error Calculations
To calculate total error across any specific temperature range, Equation 27 and Equation 28 should be used for
RSS maximum total errors, similar to the example for room temperatures. Conditions from the example in Room
Temperature Error Calculations have been replaced with their respective equations and error components for a
–40°C to 85°C temperature range below in Table 2.


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