Texas Instruments ADC08832IWM/NOPB

Overview

ADC08832IWM/NOPB from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter with integrated 2-channel analog multiplexer, track-and-hold circuitry, and 3-wire serial interface (MICROWIRE-compatible). It operates from a single 5V supply, achieves 4μs max conversion time at 2MHz clock, and delivers ±1LSB total unadjusted error across −40°C to +85°C. It is used in embedded sensor digitization where low pin count, noise immunity, and software-configurable input modes are critical.

For engineers reviewing the ADC08832IWM/NOPB datasheet, ADC08832IWM/NOPB pinout, ADC08832IWM/NOPB application, or ADC08832IWM/NOPB equivalent, key selection criteria include its 2-channel MUX programmability (single-ended/differential), internal VREF tied to VCC, 8.5mW typical active power, and SOIC-8/VSSOP-8 package compatibility - all verified for industrial process monitoring and remote sensing designs.

Technical Context

The ADC08832IWM/NOPB implements a successive-approximation register (SAR) architecture with a built-in sample-and-hold that acquires the analog input during the first half-clock period after MUX addressing. Its 2-channel multiplexer supports software-selectable single-ended or differential configurations via a 2-bit address shifted on the DI line, enabling dynamic reconfiguration per conversion.

Its 3-wire serial interface complies with MICROWIRE timing: CS initiates conversion, CLK synchronizes data transfer, and DO outputs MSB-first conversion results while DI accepts MUX control bits only during setup. The reference is internally tied to VCC, eliminating external reference components but fixing full-scale range to VCC ±50mV.

Key Specifications

Pinout & Package

ADC08832IWM/NOPB is packaged in an 8-pin SOIC (D package) or VSSOP (DGK package), both surface-mount, with identical pinout and thermal resistance of 122°C/W (VSSOP) or 235°C/W (SOIC).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial ADC applications.

Compared with ADC08832IWM/NOPB, ADC0832CCN/NOPB offers simpler control but sacrifices input flexibility and noise rejection, while MCP3002-I/P provides higher resolution and speed at the cost of increased supply sensitivity and external reference dependency.

Availability

ADC08832IWM/NOPB is available at Aetrix Electronics and suitable for industrial process monitoring, remote sensing in noisy environments, and embedded sensor node designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for ADC08832IWM/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in precision data converters and industrial-grade ICs.

The ADC08832IWM/NOPB belongs to TI's legacy 8-bit serial ADC family designed for cost-sensitive, space-constrained embedded systems requiring reliable analog digitization with minimal external components and robust noise immunity.

FAQ

What is the reference voltage configuration for ADC08832IWM/NOPB?

The ADC08832IWM/NOPB has its voltage reference (VREF) internally tied to VCC, meaning the full-scale input range is defined by the supply voltage. This eliminates the need for an external reference component and supports ratiometric measurements where the analog input and supply scale together - a key feature distinguishing it from the ADC08831, which exposes VREF as a dedicated pin.

Does ADC08832IWM/NOPB support differential input mode?

Yes, ADC08832IWM/NOPB supports differential input mode via software-configurable MUX addressing. Using a 2-bit address shifted into the device on the DI line, users can select IN0–IN1 or IN1–IN0 polarity combinations. This capability enables common-mode noise rejection in applications like motor current sensing or thermocouple measurement without external instrumentation amplifiers.

What is the maximum sampling rate of ADC08832IWM/NOPB?

The ADC08832IWM/NOPB achieves a maximum sampling rate of 153 ksps, calculated as fCLK/13 at the 2 MHz maximum clock frequency. This rate assumes continuous conversions with CS held low and accounts for MUX addressing time and internal SAR cycle duration - verified in the Electrical Characteristics table under "Sampling Rate" for ADC08832.

How does the low-power mode operate in ADC08832IWM/NOPB?

In ADC08832IWM/NOPB, low-power mode activates automatically when CS is high. In this state, analog circuitry and digital logic enter static current modes, reducing supply current to ~1.3 mA (typ) and total power dissipation to ~3.0 mW (typ). Note that reference ladder current continues to flow since VREF is tied to VCC, unlike the ADC08831 which allows external reference shutdown.

Is ADC08832IWM/NOPB pin-compatible with ADC0832?

Yes, ADC08832IWM/NOPB is explicitly documented as a superior pin-compatible replacement for ADC0832/ADC0831. It shares identical 8-pin SOIC and VSSOP footprints, pin assignments, and basic timing - while adding enhanced features including MUX addressability, track-and-hold, and improved total unadjusted error (±1 LSB vs. ±2 LSB for ADC0832).