- ADI’s 12- and 16-bit sigma-delta analog-to-digital converters achieve lower noise and reduce current consumption by 25 percent compared to competing small-package ADCs.

Norwood, MA (12/01/2009) - Analog Devices, Inc. (ADI), the global leader in data-conversion technology for signal processing applications, today expanded its portfolio of precision sigma-delta ADCs (analog-to-digital converters) with 12- and 16-bit small-package devices that achieve new levels of noise performance and low-power operation for portable industrial and medical instrumentation equipment. The 12-bit AD7170 ADC and 16-bit AD7171 ADC have a 125-Hz output data rate and generate less noise than competing converters while consuming 25 percent less current. The new converters are designed for portable instrumentation, industrial process controls, medical monitoring devices, and other applications that require reliable, highly accurate signal conversion on a tight power budget within a confined PCB (printed circuit board) area.

The AD7170 and AD7171 achieve 12- and 16-bit noise-free resolution, respectively, meeting the demanding performance specifications of equipment used to precisely monitor patient vital signs and measure real-world instrumentation phenomena, such as pressure and temperature.

Key Features of the AD7170 and AD7171 Sigma-Delta ADCs

  • INL (integral nonlinearity) of ± 0.1 LSB (least significant bit) at 12 bits (AD7170) and INL of ± 0.4 LSB at 16 bits (AD7171)
  • Power consumption = 110 microamps (5 microamps in power-down mode)
  • Ease-of-use, fixed sampling rate; no programming required
  • On-chip oscillator
  • 3 mm × 3 mm CSP package

Recommended Complementary Components
Complementary components for the AD7171 ADC include the ADR5041 precision reference and the AD8628 precision amplifier. For the AD7170 ADC, the ADR5041 precision reference and the AD8631 precision amplifier are recommended.

Pricing and Availability

Product Availability Resolution
Data Rate (Hz)
per ADC
Price Each
per 1,000
AD7170 NOW 12 125 $0.95 3 mm × 3 mm
10-lead LFCSP
AD7171 NOW 16 125 $1.15 3 mm × 3 mm
10-lead LFCSP

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For information on ADI’s ADC products, visit

Industry’s Leading Converter Portfolio
More designers turn to Analog Devices than any other supplier for the high-performance conversion technology required to bridge the analog and digital worlds in today’s myriad electronic systems. With the industry’s leading portfolio of ADCs (analog-to-digital converters) and DACs (digital-to-analog converters), Analog Devices’ data converter products feature the right combination of sampling rates and accuracy with low noise, power, and price and small package size required by industrial, medical, automotive, communications, and consumer electronics. Online evaluation tools help customers quickly validate, select, and design in the optimal data converters to reduce design complexity, development schedules, and bill-of-material costs. To view ADI’s ADC selection guide, visit For ADC drivers, visit To view ADI’s DAC selection guide, visit

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 100,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

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Editor's Contact Information:

Linda Kincaid

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