AMC1200BDUBR Datasheet, PDF (1/24 Pages) Texas Instruments – Fully-Differential Isolation Amplifier

AMC1200
AMC1200B
www.ti.com
SBAS542B – APRIL 2011 – REVISED AUGUST 2012
Fully-Differential Isolation Amplifier
Check for Samples: AMC1200, AMC1200B
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: 4250 V_PEAK (AMC1200B)
– 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
APPLICATIONS
• Shunt Resistor Based Current Sensing in:
– Motor Control
– Green Energy
– Frequency Inverters
– Uninterruptible Power Supplies
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 V_PEAK (AMC1200B) or 4000 V_PEAK
(AMC1200) according to UL1577 and IEC60747-5-2.
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 areavailable in the SMD-type,
gullwing-8 package.
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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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.
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