Amplifier features programmable gain and offset.December 3, 2008 -
Incorporating one-wire, UART-compatible digital serial interface, PGA308 amplifies sensor signal and provides digital calibration for zero and span. Using auto-zero techniques, device achieves precision and noise over extended industrial temperature range of -40°C to +125°C and has operating voltage of 2.7-5.5 V. Amplifier can store 7 banks of one-time programmable memory of gain and offset calibration parameters.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Texas Instruments, Inc. (TI)
12500 TI Blvd.
Dallas, TX, 75243-4136
USA
TI Introduces Single-Supply, Auto-Zero Sensor Amplifier with Programmable Gain and Offset
Device used as building block for bridge sensors and data acquisition
DALLAS, Nov. 21 -- Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced a single-supply, auto-zero bridge sensor amplifier. Featuring programmable gain and offset, the PGA308 amplifies the sensor signal and provides digital calibration for zero (offset) and span (gain). A One-Wire, UART-compatible digital serial interface performs the calibration. The PGA308 is used as a building block for resistive bridge sensor conditioning and general data acquisition applications. (See http://www.ti.com/pga308-pr.)
At the heart of the PGA308 is a precision, low-drift and low-noise front-end programmable gain amplifier (PGA). Digital-programmable coarse offset, fine offset and selected gain (coarse and fine) may be controlled in real time or permanently programmed into the PGA308. The device can store seven banks of one-time programmable (OTP) memory of gain and offset calibration parameters. A separate power-on reset (POR) OTP bank can be programmed up to four times.
The fault monitor detects overload, burnout and system faults. The over-/under-scale limits offer additional system-level diagnostics.
Using auto-zero techniques, the device achieves excellent precision and noise over the extended industrial temperature range of -40 degrees C to +125 degrees C and has an operating voltage of +2.7 V to +5.5 V. Other digitally calibrated sensor signal conditioning ICs from TI include PGA309, a voltage output programmable sensor conditioner with temperature compensation, and XTR108, a 4-20 mA, two-wire transmitter, or voltage output programmable RTD signal conditioner.
Availability, packaging and pricing
The PGA308 is available now from TI and its authorized distributors in a MSOP-10 package and a 3 mm x 4 mm DFN-10 package. The device is priced at $1.85 each in 1,000-piece quantities (suggested resale price). A hardware and software PGA308EVM evaluation tool is available for calibration and configuration.
About Texas Instruments
Texas Instruments (NYSE:TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 25 countries.
For more information, go to http://www.ti.com/.
Please refer all reader inquiries to:
Texas Instruments Incorporated
Semiconductor Group, SC-08148
Literature Response Center
14950 FAA Blvd.
Fort Worth, TX 76155
1-800-477-8924
Source: Texas Instruments Incorporated
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