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INA253 データシート(Datasheet) 10 Page - TI store

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部品番号. INA253
部品情報  High Voltage, Bidirectional, Zero-Drift, Current-Shunt Monitor with Integrated 2-mΩ Precision Low Inductive Shunt Resistor
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Frequency (Hz)
0.01%
0.1%
1%
10%
1
10
100
1k
10k
100k
1M
D006
90% FS Input
10
INA253
SLOS954 – MAY 2018
www.ti.com
Product Folder Links: INA253
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Copyright © 2018, Texas Instruments Incorporated
Feature Description (continued)
shows the performance profile of the device over frequency. Harmonic distortion increases at the upper end of
the amplifier bandwidth with no adverse change in detection of overcurrent events. However, increased distortion
at the highest frequencies must be considered when the measured current bandwidth begins to approach the
INA253 bandwidth.
For applications requiring distortion sensitive signals, Figure 4 provides information to show that there is an
optimal frequency performance range for the amplifier. The full amplifier bandwidth is always available for fast
overcurrent events at the same time that the lower frequency signals are amplified at a low distortion level. The
output signal accuracy is reduced for frequencies closer to the maximum bandwidth. Individual requirements
determine the acceptable limits of distortion for high-frequency, current-sensing applications. Testing and
evaluation in the end application or circuit is required to determine the acceptance criteria and to validate the
performance levels meet the system specifications.
Figure 4. Performance Over Frequency
8.4 Device Functional Modes
8.4.1 Adjusting the Output Midpoint With the Reference Pins
shows a test circuit for reference-divider accuracy. The INA253 output is configurable to allow for unidirectional
or bidirectional operation.
NOTE
Do not connect the REF1 pin or the REF2 pin to any voltage source lower than GND or
higher than VS.
The output voltage is set by applying a voltage or voltages to the reference voltage inputs, REF1 and REF2. The
reference inputs are connected to an internal gain network. There is no operational difference between the two
reference pins.




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