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AMC1200/B Fully-Differential Isolation Amplifier
1 Features
●+t 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: 8mA Maximumat 5V
●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 Isolation: :
- UL1577 and VDE V 0884-10 Approved
一Ilsolation Voltage: 4250 VpEAK (AMC 1200B)
Working Voltage: 1200 VpEAK
一Transient Immunity: 10 kV/μs Minimum
●Typical 10-Year Lifespan at Rated Working
Voltage (see Application Report SLLA197)
●Fully Specified Over the Extended Industrial
Temperature Range
2 Applications
●Shunt Resistor Based Current Sensing in:
- Motor Control
一Green Energy
一F requency Inverters
一Uninterruptible Power Supplies
3 Description
The AMC1200 and AMC1200B 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
- 40C to 105°C and are availabie in a wide-body
SOlC-8 package (DWV) and a gullwing-8 package (DUB).
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