TI Announces New Family of SAR ADCs

By Tiera Oliver

Associate Editor

Embedded Computing Design

June 09, 2021

News

TI Announces New Family of SAR ADCs

Texas Instruments (TI) expanded its portfolio of high-speed data converters with a new family of successive-approximation register (SAR) analog-to-digital converters (ADCs) designed to enable high-precision data acquisition in industrial designs.

Featuring suitable dynamic range at a low power consumption, the ADC3660 family includes eight SAR ADCs in 14-, 16-, and 18-bit resolution at sampling speeds ranging from 10 to 125 MSPS.

According to the company, the ADC3660 family delivers up to 80% lower latency than competitive devices at similar speeds. For example, system designers can achieve one-clock (8 ns) ADC latency with the 125-MSPS, 14-bit, dual-channel ADC3664. The family’s low latency enables high-speed digital control loops in a variety of industrial systems to monitor and respond to voltage and current spikes, increasing tool precision in applications such as semiconductor manufacturing systems.

As some engineers designing industrial systems have to choose between noise performance and low power consumption in battery-operated devices that require precise data acquisition, per the company, the ADC3660 family eliminates this trade-off. For example, the ADC3683 – the 18-bit ADC at 65 MSPS – is designed to improve noise performance in narrowband-frequency applications such as portable defense radios, offering a signal-to-noise ratio (SNR) of 84.2 dB and a noise spectral density of -160 dBFS/Hz, while maintaining low power consumption of 94 mW per channel. Consuming 36 mW total, the 10-MSPS, 14-bit ADC3541 is also designed to simplify thermal management and extend battery life in power-sensitive applications such as GPS receivers or handheld electronics. And according to the comany, the 65-MSPS, 16-bit ADC3660 delivers 82 dBFS SNR, improving image resolution in sonar applications while consuming 65% less power (71 mW per channel) than the equivalent competitive device.

Watch the video, “Increasing signal detection capability in industrial applications,” to learn more about how the family’s noise performance contributes to high accuracy and suitable image resolution.

The ADC3660 family’s high sampling speeds and integrated features are aimed at helping designers reduce the number of components in their systems. For example, the ADC3683, which according to the company samples four times faster than the closest competing 18-bit device at twice the channel density, enables oversampling, a technique that pushes harmonics further from the desired signal. Per the company, this allows designers to reduce antialiasing filter complexity and system component count by as much as 75%.

Other family features that reduce design complexity include on-chip decimation options that enable designers to remove unwanted noise and harmonics in the system and boost SNR and spurious-free dynamic range up to 15 dB. These decimation options, along with the complementary metal-oxide semiconductor (CMOS) interface, enable designers to use these ADCs with Arm-based processors or digital signal processors instead of field-programmable gate arrays (FPGAs).

The ADC3563, ADC3583, ADC3643, ADC3660, ADC3663, ADC3664, and ADC3683 are available now from TI in a 5-mm-by-5-mm very thin quad flat no-lead (WQFN) package. Pre-production versions of the ADC3541 are available now, only on TI.com, with volume production expected in the first quarter of 2022. Evaluation modules are available from TI for US$249. 

Product

Sample rate

Resolution

Channel count

Package

Buy now from TI

Price (1,000-unit quantity)

Evaluation module

ADC3541

10 MSPS

14 bit

1

WQFN (5 mm by 5 mm)

ADC3541

US$14.50

Expected in fourth quarter 2021

ADC3563

65 MSPS

16 bit

1

ADC3563

US$46.50

ADC3663EVM

ADC3663

65 MSPS

16 bit

2

ADC3663

US$64.50

ADC3583

65 MSPS

18 bit

1

ADC3583

US$71.50

ADC3683EVM

ADC3683

65 MSPS

18 bit

2

ADC3683

US$99.50

ADC3643

65 MSPS

14 bit

2

ADC3643

US$37.00

ADC3643EVM

ADC3660

65 MSPS

16 bit

2

ADC3660

US$46.50

ADC3660EVM

ADC3664

125 MSPS

14 bit

2

ADC3664

US$61.50

ADC3664EVM

For more information, explore the ADC3660 family at www.ti.com/ADC3660family-pr or TI.com.

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Tiera Oliver, Associate Editor for Embedded Computing Design, is responsible for web content edits, product news, and constructing stories. She also assists with newsletter updates as well as contributing and editing content for ECD podcasts and the ECD YouTube channel. Before working at ECD, Tiera graduated from Northern Arizona University where she received her B.S. in journalism and political science and worked as a news reporter for the university’s student led newspaper, The Lumberjack.

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