DALLAS (Jan. 27, 2014) – Texas Instruments (TI) (NASDAQ: TXN) today expanded its SAR (successive approximation register) analog-to-digital converter (ADC) product portfolio with a new family of 12 devices that provide the industry’s widest analog supply and common-mode voltage ranges. The 1-channel ADS8881 family includes high-performance, ultra-low power 18- and 16-bit SAR ADCs with speed options ranging from 100 kSPS to 1 MSPS. Engineers can chose the right ADC for their designs in a wide variety of applications – from high-end industrial, such as high-performance test and measurement equipment, precision metrology and precision sensor transmitters for industrial automation, to battery-operated test and measurement and portable medical. For more information about the ADS8881 family, visit www.ti.com/ads8881-pr.

Key benefits of the ADS8881 family:

• Widest input common mode: Most of the new ADCs provide an input common-mode range that is 20x wider than other devices. This simplifies signal conditioning and enables system designers to more easily digitize the difference between two independent sensor signals with widely varying common-mode voltage values over time.
• Flexible analog and digital supply voltage ranges: Features an analog supply voltage range of 2.7 V to 3.6 V, three times wider than existing devices. This enables direct operation from a Lithium-Ion battery. Also, with an even wider digital supply voltage range of 1.65 V to 3.6 V, the ADCs meet most microprocessor supply requirements.
• Ultra-low power: The 1-MSPS SAR ADCs consume only 5.5 mW of power at 1 MSPS and 55 uW at 10 kSPS, making them suitable for pulsed DC measurements in portable medical and heat-sensitive automated test applications.
• Large pin-compatible family: All 12 devices are pin-compatible and available in both MSOP and QFN package options, enabling engineers to reuse the same analog signal chain design across their products with minimal, if any, redesign.

Tools and support to jump-start design

TI offers a range of support tools for the ADS8881 family to speed time to market, including reference designs, simulation models and hardware evaluation kits.

The following TI Precision Designs reference design circuits provide theory, simulation, calculation, design methodology and more.

• Multiplexed and step-response:
  • Data Acquisition for MUX and Step Inputs, 18 bits, 1 uS Full-Scale Response
  • 16-bit, 400-kSPS, 4-Ch. Multiplexed Data Acquisition System for High-Voltage Inputs
• High precision:
  • Data Acquisition Optimized for Lowest Distortion, Lowest Noise, 18 bit, 1Msps
• Low power:
  • Data Acquisition at 1 KHz AC, 1 mW, 18 bit, 1 Msps
  • Data Acquisition for 10 kHz AC, 35mW, 18 bit, 1 Msps
• Medical:
  • Data Acquisition Block for ECG Systems, Discrete LEAD/ECG Implementation

The ADS8881EVM-PDK, ADS8861EVM-PDK and ADS8860EVM-PDK performance development kits may be purchased for US$199. The kits enable system designers to quickly evaluate and test device performance using only the provided hardware and TI’s ADCPro™ software tool.  

IBIS and TINA-TI™ models are also available for the ADS8881 family to optimize front-end signal conditioning circuitry in software simulation.

Support is available on the Precision Converters Forum in the TI E2E™ Community, where engineers can search for solutions, get help, share knowledge and solve problems with fellow engineers and TI experts.

Package, availability and pricing

The ADC8881 family is available today in the following 10-pin, 3-mm by 4.9-mm MSOP and 3-mm by 3-mm QFN options:

Device	Resolution	Sample rate	Signal-to-noise ratio (SNR)	Signal-to-noise + distortion (SINAD)	Price (1,000 units)
ADS8881	18	1 MSPS	100	99.9	$US19.95
ADS8883	18	680 kSPS	100	99.9	$US14.95
ADS8885	18	400 kSPS	100	99.99	$US10.95
ADS8887	18	100 kSPS	100	99.99	$US7.95
ADS8861	16	1 MSPS	96	95.9	$US11.00
ADS8863	16	680 kSPS	96	95.9	$US9.00
ADS8865	16	400 kSPS	96	95.9	$US7.50
ADS8867	16	100 kSPS	96	95.5	$US5.50
ADS8860	16	1 MSPS	93	92.8	$US10.00
ADS8862	16	680 kSPS	93	92.8	$US8.00
ADS8864	16	400 kSPS	93	92.8	$US6.50
ADS8866	16	100 kSPS	93	92.8	$US5.00

Learn more about TI’s SAR ADC portfolio by visiting the links below:

• Buy the ADS8881EVM-PDK, ADS8861EVM-PDK or ADS8860EVM-PDK from the TI eStore.
• Get tips on how to measure the true linearity of a high-resolution ADC in this short blog post.
• Search for TI Precision Designs reference designs. 

About Texas Instruments

Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. By employing the world’s brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today. Learn more at www.ti.com.

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