DALLAS, Dec. 12, 2011 /PRNewswire/ -- Texas
Instruments Incorporated (TI) (NYSE: TXN) today introduced the
industry's most accurate difference amplifier for high common-mode
voltage applications up to +275 V. With a best-in-class common-mode
rejection ratio (CMRR) of 100 dB, the INA149 increases overall
measurement accuracy by 2x compared to the competition and is the
first high-voltage difference amplifier with a specified minimum
90-dB CMRR performance in harsh, high-temperature environments up
to 125 degrees C. The amplifier also lowers initial gain error by
33 percent compared to the competition, while providing twice the
slew rate to increase response time and overall system performance.
For more information and to order samples or evaluation modules,
visit www.ti.com/ina149-pr.
"The INA149 offers the highest precision measurement of low
differential signals in industrial designs, which means higher
performing, more accurate products for our customers," said
Steve Anderson, senior vice
president of TI's High Performance Analog business. "The device
also eliminates the need for multiple isolators or power supplies
in high common-mode voltage applications to reduce component
count, improve reliability and simplify system design."
The INA149 can be used in a variety of high common-mode-voltage
applications, such as high-voltage current sensing; battery cell
voltage monitoring in photovoltaic, telecom, electric vehicles, and
alternative energy applications; power-supply current monitoring;
and motor control.
Key features and benefits of the INA149:
- 100-dB CMRR with a specified minimum CMRR of more than 90 dB
throughout the industrial temperature range of -40 degrees C up to
125 degrees C increases overall measurement accuracy more than
two-fold compared to the closest competitor.
- Extended input common-mode-voltage from -275 V to +275 V
enables accurate monitoring of signals riding in high common-mode
voltages, eliminating the need for multiple supply sources and
analog isolation components to interface to an analog-to-digital
converter (ADC).
- Twice the slew rate and full-power bandwidth of its closest
competitor for applications where abrupt changes, such as short
circuit conditions, are monitored and corrective actions need to be
commanded quickly. The faster response and wider large-signal
bandwidth of 500 kHz increases system performance.
- Lower maximum initial gain error of 0.02 percent provides
better accuracy, especially in applications with lower common-mode
voltage signals.
Tools and support
TI offers a variety of tools and support to speed development
with the INA149, including an evaluation module (INA149EVM), which
can be ordered today for $49, and a
TINA-TI SPICE model to simulate device performance.
Availability, packaging and pricing
The INA149 is available today in a 4.9-mm x 6-mm SOIC package
for a suggested retail price of $2.70
in 1,000-unit quantities.
Growing instrumentation amplifier portfolio
The INA149 is the newest addition to TI's growing family of
instrumentation amplifiers, which includes:
- New INA826, a low-cost instrumentation amplifier that offers
extremely low power consumption and operates over a very wide
single or dual supply range. It provides a 40-percent reduction in
power consumption, 50-percent lower settling time, 35-percent lower
noise, 60-percent lower gain drift and more than 1.5 times better
CMRR than its closest competitor.
- INA333, a low-power, precision instrumentation amplifier
offering excellent accuracy. The versatile 3-op amp design, small
size and low power make it suitable for a wide range of portable
applications.
- PGA280, a high-precision instrumentation amplifier with
digitally controllable gain and signal integrity test capability.
This device offers low offset voltage, near-zero offset and gain
drift, excellent linearity, and nearly no 1/f noise with superior
common-mode and supply rejection to support high-resolution
precision measurement.
Learn more about TI's precision amplifier portfolio by
visiting the links below:
- Order INA149 samples: www.ti.com/ina149s-pr.
- Download the data sheet: www.ti.com/ina149ds-pr.
- Watch the video: www.ti.com/ina149v-pr.
- Ask questions, help solve problems in the Precision Amplifier
Forum in the TI E2E™ Community: www.ti.com/e2epa-pr.
About Texas Instruments
Texas Instruments semiconductor innovations help 80,000
customers unlock the possibilities of the world as it could be –
smarter, safer, greener, healthier and more fun. Our
commitment to building a better future is ingrained in everything
we do – from the responsible manufacturing of our semiconductors,
to caring for our employees, to giving back inside our
communities. This is just the beginning of our
story. Learn more at www.ti.com.
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SOURCE Texas Instruments Incorporated