0V 250mV
2.55V
2V
1.29V
2V
5V
3.3V
GND1 GND2
VDD1 VDD2
VOUTP
VOUTN
VINP
VINN
AMC1200
www.ti.com
SBAS542 –APRIL 2011
Fully-Differential Isolation Amplifier
Check for Samples: AMC1200
1
FEATURES
DESCRIPTION
The AMC1200 is a precision isolation amplifier with
2
• ±250-mV Input Voltage Range Optimized for
an output separated from the input circuitry by a
Shunt Resistors
silicon dioxide (SiO
2
) barrier that is highly resistant to
• Very Low Nonlinearity: 0.075% max at 5 V
magnetic interference. This barrier has been certified
• Low Offset Error: 1.5 mV max
to provide galvanic isolation of up to 4000 V
PEAK
according to UL1577 and IEC60747-5-2. Used in
• Low Noise: 3.1 mV
RMS
typ
conjunction with isolated power supplies, this device
• Low High-Side Supply Current: 8 mA max at
prevents noise currents on a high common-mode
5 V
voltage line from entering the local ground and
• Input Bandwidth: 60 kHz min
interfering with or damaging sensitive circuitry.
• Fixed Gain: 8 (0.5% accuracy)
The input of the AMC1200 is optimized for direct
connection to shunt resistors or other low voltage
• High Common-Mode Rejection Ratio: 108 dB
level signal sources. The excellent performance of
• 3.3-V Operation on Low-Side
the device supports accurate current control resulting
• Certified Galvanic Isolation:
in system-level power saving and, especially in
– UL1577 and IEC60747-5-2 Approved
motor-control applications, lower torque ripple. The
common-mode voltage of the output signal is
– Isolation Voltage: 4000 V
PEAK
automatically adjusted to either the 3-V or 5-V
– Working Voltage: 1200 V
PEAK
low-side supply.
– Transient Immunity: 10 kV/µs min
The AMC1200 is fully specified over the extended
• Typical 10-Year Lifespan at Rated Working
industrial temperature range of –40 °C to +105 °C
Voltage (see Application Report SLLA197)
and is available in the SMD-type, gullwing-8 package.
• Fully Specified Over the Extended Industrial
Temperature Range
APPLICATIONS
• Shunt Resistor Based Current Sensing in:
– Motor Control
– Green Energy
– Frequency Inverters
– Uninterruptible Power Supplies
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
