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Amplifier interfaces ±10-V signals

Dallas — This level-shifting difference amplifier from Texas Instruments Inc.'s (TI) Burr-Brown line, was made to interface ±10-V signals to single supply analog-to-digital converters (A/D converters) —especially those with 4.096-V or 5-V references.

When combined with an economical single supply A/D converter, the INA159 provides a high accuracy, easy-to-use, cost competitive solution compared to a ±10-V input A/D converter, the company said. Targeted applications for this device include data acquisition, industrial process control and test equipment.

Prior to the introduction of the INA159, functionality was achieved using complicated and expensive precision resistor networks and a high performance op amp, according to TI. The amplifier in the INA159 is especially suited for driving up to 14-bit A/D converters, such as TI's ADS8324, with its 1.5-MHz bandwidth and 15 V/μs slew rate, along with low output impedance. A split reference connection simplifies biasing at one half supply or reference and eliminates the need for an additional op amp.

Single supply voltage range is from 2.7 V to 5.5 V. The device features low offset (500 μV maximum), high gain accuracy (0.024 percent maximum), low quiescent current (1.5 mA maximum) and specification over a -40°C to +125°C temperature range.

Click here for more information on TI’s analog design support, and to download the latest Amplifier Selection Guide.

The INA159 is available now in a MSOP8 package and is priced from $1.59 in 1,000 piece quantities (suggested resale pricing). Click here for the INA159 data sheet.

Texas Instruments , 1-800-477-8924, www.TI.com.

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