Date: 14th July 2011
Isolated amp and delta sigma modulator
from TI for power electronics apps
Texas Instruments Incorporated has introduced AMC1200
isolated amplifier and AMC1204 delta-sigma modulator that
enables shunt-based current measurement in motor control
and green energy applications and to obtain increase in
accuracy, temperature stability and immunity to magnetic
fields in equipments such as AC drives, solar inverters
and uninterruptible power supplies.
TI says AMC1200 is a 4-kV peak isolated amplifier providing
80-percent better linearity and gain drift compared to competitive
devices while reducing power consumption by 50 percent.
The AMC1204 is a 20-MHz, externally clocked, isolated delta-sigma
modulator that provides 40-percent better linearity than
the competition.
Key features and benefits as per TI include:
AMC1200 isolated amplifier:
High precision with a maximum non-linearity of 0.07 percent
and gain drift of 56 ppm/C.
Reduced power consumption with a low high-side supply current
of no more than 8 mA at 5 V.
Fully specified over the extended industrial temperature
range of -40 to 105 degrees C - 20 degrees higher than competitive
offerings.
Easy connection to analog-to-digital converters (ADCs) and
microcontrollers (MCUs) with 5-V or 3.3-V operation on the
low side and self-adjusting common mode voltage.
AMC1204 isolated delta-sigma modulator:
Ultra-high accuracy with best-in-class non-linearity of
+/- 8 LSB, maximum, and a digital output that allows designers
to define digital filter characteristics based on system
requirements.
Includes an external clock interface to enable simultaneous
measurement of multiple channels.
Both devices provide high electromagnetic interference immunity
and a robust isolation barrier certified by UL 1577 and
IEC 60747-5-2. The AMC1204 is also CSA-certified.
Available: Now
Package: 10-mm x 7-mm SOIC package
Price: $2.20 each for 1K units
For more info visit: www.ti.com
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