Low-power, 12-bit, 2-channel, 1-MHz, single/dual unipolar input, ADCs with serial interface


Product details


Resolution (Bits) 12 Number of input channels 2 Sample rate (Max) (kSPS) 1000 Interface type Serial Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Daisy-Chainable, Oscillator Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 13.7 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 73.9 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 0.5 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TSSOP (PW) 16 22 mm² 4.4 x 5 VQFN (RSA) 16 16 mm² 4 x 4 open-in-new Find other Precision ADCs (<=10MSPS)


  • 2.7V to 5.5V Analog Supply, Low Power:
    • 13.7mW (1MHz, +VA = 3V, +VBD = 1.8V)
  • 1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,
    900kHz Sampling Rate 2.7V ≤ +VA ≤ 3V
  • Excellent DC Performance:
    • ±0.15LSB Typ, ±0.5LSB Max INL
    • ±0.12LSB Typ, ±0.5LSB Max DNL
    • ±0.8mV Max Offset Error at 3V
    • ±1.25mV Max Offset Error at 5V
  • Excellent AC Performance at fi = 10kHz with 73.9dB SNR, 93.4dB SFDR, -88.5dB THD
  • Built-In Conversion Clock (CCLK)
  • 1.65V to 5.5V I/O Supply:
    • SPI/DSP-Compatible Serial Interface
    • SCLK up to 50MHz
  • Comprehensive Power-Down Modes:
    • Deep Power-Down
    • Nap Power-Down
    • Auto Nap Power-Down
  • Unipolar Input Range: 0V to VREF
  • Software Reset
  • Global CONVST (Independent of CS)
  • Programmable Status/Polarity EOC/INT
  • 4 × 4 QFN-16 and TSSOP-16 Packages
  • Multi-Chip Daisy-Chain Mode
  • Programmable TAG Bit Output
  • Auto/Manual Channel Select Mode (ADS7230)
    • Communications
    • Transducer Interface
    • Medical Instruments
    • Magnetometers
    • Industrial Process Control
    • Data Acquisition Systems
    • Automatic Test Equipment

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open-in-new Find other Precision ADCs (<=10MSPS)


The ADS7229 is a low-power, 12-bit, 1MSPS analog-to-digital converter (ADC) with a unipolar input. The device includes a 12-bit capacitor-based successive approximation register (SAR) ADC with inherent sample-and-hold.

The ADS7230 is based on the same core and includes a 2-to-1 input MUX with a programmable TAG bit output option. Both the ADS7229 and ADS7230 offer a high-speed, wide voltage serial interface and are capable of daisy-chain mode operation when multiple converters are used.

These devices are available in 4 × 4 QFN and TSSOP-16 packages, and are fully specified for operation over the industrial -40°C to +85°C temperature range.

open-in-new Find other Precision ADCs (<=10MSPS)

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 4
Type Title Date
* Datasheet LOW-POWER, 12-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT, ADC w/SERIAL INTERFACE datasheet (Rev. A) Jun. 18, 2009
White papers Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar. 17, 2011
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) Nov. 10, 2010

Design & development

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Design tools & simulation

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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CAD/CAE symbols

Package Pins Download
QFN (RSA) 16 View options
TSSOP (PW) 16 View options

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