AMC1200_1108 Datasheet, PDF (1/23 Pages) Texas Instruments – Fully-Differential Isolation Amplifier

AMC1200
www.ti.com
SBAS542A – APRIL 2011 – REVISED AUGUST 2011
Fully-Differential Isolation Amplifier
Check for Samples: AMC1200
FEATURES
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•2 ±250-mV Input Voltage Range Optimized for
Shunt Resistors
• Very Low Nonlinearity: 0.075% max at 5 V
• Low Offset Error: 1.5 mV max
• Low Noise: 3.1 mV_RMS typ
• Low High-Side Supply Current: 8 mA max at
5V
• Input Bandwidth: 60 kHz min
• 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 IEC60747-5-2 Approved
– Isolation Voltage: 4000 V_PEAK
– Working Voltage: 1200 V_PEAK
– Transient Immunity: 10 kV/µs min
• Typical 10-Year Lifespan at Rated Working
Voltage (see Application Report SLLA197)
• Fully Specified Over the Extended Industrial
Temperature Range
DESCRIPTION
The AMC1200 is a precision isolation amplifier 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 4000 V_PEAK
according to UL1577 and IEC60747-5-2. Used in
conjunction with isolated power supplies, this device
prevents 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 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 is fully specified over the extended
industrial temperature range of –40 °C to +105 °C
and is available in the SMD-type, gullwing-8 package.
APPLICATIONS
• Shunt Resistor Based Current Sensing in:
– Motor Control
– Green Energy
– Frequency Inverters
– Uninterruptible Power Supplies
VDD1
VDD2
5V
VINP
2.55 V
2V
VOUTP
0V
250 mV
VINN
3.3 V
VOUTN
1.29 V
2V
GND1
GND2
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated