AMC1200BDWVR ±250mV Input Basic Isolation Amplifier for Current Sensing

The AMC1200 and AMC1200B are high precision isolation amplifiers that isolate the output and input circuits by a silicon dioxide (SiO2) isolation barrier with high magnetic field immunity. This barrier is certified/certified to UL1577 and VDE V 0884-10 and provides galvanic isolation up to 4250 VPEAK (AMC1200B) or 4000 VPEAK (AMC1200). Used in conjunction with isolated power supplies, these devices prevent noise currents on common-mode high-voltage lines from entering the local ground and interfering with or damaging sensitive circuits.

The input of the AMC1200 or AMC1200B is optimized for direct connection to shunt resistors or other low voltage level signal sources. The high performance of the device enables precise/accurate current control, which reduces system-level power consumption (especially in motor control applications) and reduces torque ripple. Automatically adjusts the common-mode voltage of the output signal to 3V or

5V low-side supply voltage.

The AMC1200 and AMC1200B are fully rated for operation over the extended industrial temperature range (–40°C to 105°C) and are available in wide-body 8-pin Small Outline Integrated Circuit (SOIC) (DWV) packages as well as gullwing 8 (DUB) packages.

Input range (Vp-p)±0.25

Isolation working voltage VIOWM (rms) (V)800

Isolation transient overvoltage VIOTM (peak) (V)4250

CMTI (Min) (kV/μs)10

Input offset (+/-) (Max) (mV)1.5

Input offset drift (+/-) (Typ) (uV/C)1.5

Gain error (+/-) (Max) (%)1

Gain error drift (+/-) (Typ) (ppm/°C)56

Gain non-linearity (+/-) (Max) (%)0.075

Small signal bandwidth (Typ) (kHz)100

RatingCatalog

Operating temperature range (C)-40 to 105

±250mV Input Voltage Range Optimized for Shunt Resistors

Extremely low nonlinearity: 0.075% maximum at 5V_Low offset error: 1.5mV maximum

Low Noise: 3.1mVRMS (typ)

Low and high side supply current:

Maximum value is 8mA at 5V

Input bandwidth: a small value of 60kHz

Fixed gain: 8 (0.5% accuracy)

High common mode rejection ratio: 108dB

3.3V low-side operating voltage

Certified/Certified Galvanic Isolation:

Approved to UL1577 and VDE V 0884-10

Isolation Voltage: 4250 VPEAK (AMC1200B)

Operating voltage: 1200 VPEAK

Transient immunity: 10kV/μs (very small value)

Typical service life is 10 years at rated operating voltage (see application report/report)

Operates over extended industrial temperature range

application

Shunt resistor based current sensing in the following applications:

motor control

green energy

Inverter

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