8-Bit, 1-Ch, Serial I/O CMOS A/D Converters with Multiplexer and Sample/Hold Function


Product details


Resolution (Bits) 8 Number of input channels 1 Sample rate (Max) (kSPS) 250 Interface type SPI, Microwire (Serial I/O) Architecture SAR Input type Differential, Single-Ended Multi-channel configuration Rating Catalog Reference mode Ext Input range (Max) (V) 6 Input range (Min) (V) 0 Features Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 8.5 Analog voltage AVDD (Min) (V) 4.5 SNR (dB) 48.5 Analog voltage AVDD (Max) (V) 6 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 4.5 Digital supply (Max) (V) 6 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Precision ADCs (<=10MSPS)


  • 3-Wire Serial Digital Data Link Requires Few I/O Pins
  • Analog Input Track/Hold Function
  • 2-Channel Input Multiplexer Option with Address Logic
  • Analog Input Voltage Range from GND to VCC
  • No Zero or Full Scale Adjustment Required
  • TTL/CMOS Input/Output Compatible
  • Superior Pin Compatible Replacement for ADC0831/2

Key Specifications

  • Resolution: 8 Bits
  • Conversion Time (fC = 2 MHz): 4μs (Max)
  • Power Dissipation: 8.5mW (Typ)
  • Low Power Mode: 3.0mW (Typ)
  • Single Supply: 5VDC
  • Total Unadjusted Error: ±1LSB
  • No Missing Codes over Temperature

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The ADC08831/ADC08832 are 8-bit successive approximation Analog to Digital converters with 3-wire serial interfaces and a configurable input multiplexer for 2 channels. The serial I/O will interface to COPSfamily of micro-controllers, PLD's, microprocessors, DSP's, or shift registers. The serial I/O is configured to comply with the MICROWIRE serial data exchange standard.

To minimize total power consumption, the ADC08831/ADC08832 automatically go into low power mode whenever they are not performing conversions.

A track/hold function allows the analog voltage at the positive input to vary during the actual A/D conversion.

The analog inputs can be configured to operate in various combinations of single-ended, differential, or pseudo-differential modes. The voltage reference input can be adjusted to allow encoding of small analog voltage spans to the full 8-bits of resolution.

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

Technical documentation

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Type Title Date
* Data sheet ADC08831/32 8Bit Ser I/O CMOS A/D Conv w/Multiplxr & Sam/Hold Func datasheet (Rev. C) Mar. 19, 2013
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015

Design & development

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Design tools & simulation

PSpice® for TI design and simulation tool
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 (...)
  • Leverages Cadence PSpice Technology
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SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
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 (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
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    • Gain selections using standard resistors
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