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AMC1200SDUBR Fully-Differential Isolation Amplifier Low Offset Error 1.5 mV max
1 Features
+250-mV Input Voltage Range Optimized for Shunt Resistors
Very Low Nonlinearity: 0.075% Maximum at 5 V
Low Offset Error: 1.5 mV Maximum
Low Noise: 3.1 mV RMS Typical
Low High-Side Supply Current:
8mAMaximumat5V
Input Bandwidth: 60 kHz Minimum
Fixed Gain: 8 (0.5% accuracy)
High Common Mode Rejection Ratio: 108 dB
3.3-V Operation on Low-Side
Certified Galvanic lsolation:
- UL1577 and VDE V 0884-10 Approved
- Isolation Voltage: 4250 VpEAK (AMC 1200B)
- Working Voltage: 1200 VpEAK
- Transient Immunity: 10 kV/us Minimum
Typical 10-Year Lifespan at Rated Working
Voltage (see Application Report SLL A197)
Fully Specified Over the Extended Industrial
Temperature Range
2 Applications
Shunt Resistor Based Current Sensing in:
Motor Control
Green Energy
Frequency Inverters
Uninterruptible Power Supplies
3 Description
The AMC1200 and AMC 1200B are precision isolation amplifiers
with an output separated from the input circuitry by a silicon dioxide (SiO2) barrier
that is highly resistant to magnetic interference.
This barrier has been certified to provide galvanic isolation of up to 4250 VpEAK (AMC1200B)
or 4000 VPEAK (AMC1200) according to UL1577 and VDE V 0884- 10. Used in conjunction with isolated power supplies,
these devices prevent noise currents on a high common mode voltage line from entering the local ground and interfering
with or damaging sensitive circuitry.
The input of the AMC1200 or AMC1200B is optimized for direct connection to shunt resistors
or other low voltage level signal sources.
The excellent performance of the device supports accurate current control resulting in system-level power saving
and especially in motor-control applications, lower torque ripple.
The common mode voltage of the output signal is automatically adjusted to either the 3-V or 5-V low-side supply.
The AMC1200 and AMC1200B are fully specified over the extended industrial temperature range of- 40°C to 105°C
and are available in a wide-body SOlC-8 package (DWV) and a gullwing-8 package (DUB).
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