TI's ADC Drivers Set New Standards for Power and Performance to Increase Accuracy and Battery Life

Driver amplifier providing optimal power consumption, bandwidth, slew rate, total harmonic distortion, and precision characteristics

TI Korea ( www.ti.com/ww/kr ) November 8, 2011 – TI has expanded its portfolio of general-purpose, low-power, rail-to-rail output operational amplifiers by launching new single and dual ADC drivers that deliver the best performance-to-power ratio. The OPAx836 operational amplifier consumes 33% less power than comparable solutions while providing more than double the bandwidth, a 15x faster slew rate, 40x improved Total Harmonic Distortion (THD), and 75% higher precision. (For sample orders and further information, please refer to www.ti.com/opa2836-pr )

Steve Anderson, Senior Vice President of TI’s High Performance Analog Business Unit, stated, “Until now, customers designing portable industrial measurement devices have been limited by operational amplifier performance when designing 12-bit, 14-bit, and 16-bit precision SAR and delta-sigma ADCs for high-precision applications such as ultrasonic meters, smart pumps, and power quality meters.” He added, “The OPAx386 operational amplifier provides the industry’s best performance-to-power ratio, enabling customers to drive data converters to performance on the datasheet and deliver ultra-low power consumption characteristics.” “These ADC drivers allow developers to increase accuracy while extending the battery life of portable industrial and medical devices,” he said.

The OPAx835 ADC driver is also available for customers requiring lower power for battery-powered consumer electronics such as cameras, laptops, and mobile phones. The OPAx835 operational amplifier consumes 60% less power than competing products while still providing the best performance-to-power ratio. (For more information on the OPAx835 operational amplifier, see www.ti.com/opa2835-pr )

Key Features and Advantages of the OPAx836 ADC Driver
• Lowest Power Consumption: Consumes 1mA of power per channel to extend battery life in portable industrial, consumer, and medical applications, and provides the 205MHz bandwidth required to drive low-power SAR and delta-sigma ADCs such as the ADS7945 and National's ADC128S102.
• Maximum Performance: Achieves best-in-class linearity, signal-to-noise ratio (SNR), best-in-class SFDR (Spurious-Free Dynamic Range), enhanced sensitivity, and data converter performance by providing a bandwidth of 205 MHz with a slew rate of 560 V/μs, THD of 130 dBc, and noise characteristics of 4.6 nV/rt Hz.
• High Precision: Provides a typical input-offset voltage of 0.065 μV and a drift characteristic of 1.1 mV/°C for accurate measurements.
• Smallest Package: The ultra-small 2mm x 2mm WQFN package with integrated gain setting registers reduces board space by up to 75% compared to competitors.

Tools and Support
EVMs for the single-channel OPA836 (OPA836IDBVEVM) and dual OPA2836 (OPA2836IDGSEVM) are available for $99 and $149, respectively. Reference designs for OPA836 are also provided with ADS7945 (ADS7945EVM-PDK) and ADS7946 (ADS7946EVM-PDK).

Currently, the EVM for single-channel OPA835 (OPA835IDBVEVM) and the EVM for dual OPA2835 (OPA2835IDGSEVM) are available for purchase at $99 and $149, respectively.

PSpice, TINA-TI Spice, and TINA-TI reference designs are also available for all four devices.

Supply timing, packaging, and price
Sample and mass production quantities of the single-channel OPA836 and OPA835 are currently available in two options: 10-pin 2mm x 2mm WQFN and 6-pin 3mm x 3mm SOT23. Pricing is $0.90 per unit for the OPA836 and $0.85 per unit for the OPA835, based on a quantity of 1,000.

Samples and mass production quantities of the dual OPA2836 and OPA2835 are currently available in three options: 8-pin 4mm x 5mm SOIC, 10-pin 3mm x 3mm MSOP, and 10-pin 2mm x 2mm WQFN. The price is $1.50 per unit for OPA2836 and $1.35 per unit for OPA2835, based on a quantity of 1,000 units.

More detailed information on TI's high-speed operational amplifier portfolio
• Order OPA836 samples: www.ti.com/opa836s-pr
• Order OPA2836 samples: www.ti.com/opa2836s-pr
• Download data sheet: www.ti.com/opax836ds-pr
• Watch video: www.ti.com/opa2836v-pr
• Download Analog Signal Chain Guide
• Ask engineers and troubleshoot on the TI E2E™ Community Precision Amplifier Forum:
www.ti.com/e2epa-pr
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