Texas Instruments ADC08832IM/NOPB

Overview

ADC08832IM/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 compliant with MICROWIRE standard. It operates from a single 5V supply, achieves ≤4μs conversion time at 2MHz clock, and delivers ±1LSB total unadjusted error over −40°C to +85°C. It is used in remote sensor digitization where low pin count and noise-immune serial data transmission are critical.

For engineers reviewing the ADC08832IM/NOPB datasheet, ADC08832IM/NOPB pinout, ADC08832IM/NOPB application, or ADC08832IM/NOPB equivalent, key selection considerations include its fixed V_REF = V_CC architecture, software-configurable single-ended/differential input modes, CS-controlled low-power mode (3.0mW typ), and SOIC/VSSOP-8 package compatibility with space-constrained industrial sensing nodes.

Technical Context

The ADC08832IM/NOPB implements a successive-approximation register (SAR) core with internal ratioed capacitor array and resistor ladder for bit-weighting. Its analog front-end includes a built-in track-and-hold that samples the selected differential or single-ended channel during MUX settling (½ clock period), enabling accurate acquisition of signals up to 153ksps sampling rate.

Digital control uses a 3-wire serial interface (CS, CLK, DI/DO) with start-bit–driven MUX addressing: two bits select among four configurations - single-ended CH0, single-ended CH1, differential CH0–CH1, or differential CH1–CH0. The DO line outputs MSB-first conversion result followed by LSB-first redundant data, and enters TRI-STATE when CS is high.

Key Specifications

Pinout & Package

ADC08832IM/NOPB is available in 8-pin SOIC (D) and VSSOP (DGK) packages - both surface-mount, lead-free, and RoHS-compliant. Pin functions are identical across packages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC0832CCN/NOPB, ADC08832IM/NOPB adds track-and-hold and tighter error spec (±1 LSB), reducing external component count and improving dynamic accuracy. Against MCP3002-I/P, it trades resolution for simpler ratiometric operation and flexible differential polarity-critical for bidirectional transducer interfaces.

Availability

ADC08832IM/NOPB is available at Aetrix Electronics and suitable for industrial process monitoring, remote sensor digitization, and low-power battery instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADC08832IM/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 over 90 years of innovation in precision data conversion.

The ADC0883x family was designed for cost-sensitive, space-constrained industrial and embedded systems needing simple, reliable 8-bit digitization with minimal external components and robust noise immunity.

FAQ

What is the reference voltage configuration of ADC08832IM/NOPB?

The ADC08832IM/NOPB has its reference voltage (V_REF) internally tied to V_CC, eliminating the need for an external reference. This ratiometric architecture ensures consistent code mapping when sensor outputs scale with the supply rail, simplifying design for transducer interfaces. Unlike the ADC08831, the ADC08832IM/NOPB does not expose a V_REF pin.

Does ADC08832IM/NOPB support differential input polarity reversal?

Yes, ADC08832IM/NOPB supports full differential polarity reversal via its 2-bit MUX address: users can configure either IN0–IN1 or IN1–IN0 as the differential pair. This enables bidirectional measurement (e.g., current flow direction in shunt-based sensing) without external signal inversion circuitry - a feature absent in pin-compatible alternatives like ADC0832CCN/NOPB.

What is the maximum sampling rate achievable with ADC08832IM/NOPB?

The ADC08832IM/NOPB achieves a maximum sampling rate of 153 ksps when operated at f_CLK = 2 MHz. This is derived from f_CLK/13 due to internal timing overhead including MUX addressing and settling. At lower clock frequencies (e.g., 500 kHz), the sampling rate scales linearly to ~38 ksps, maintaining full 8-bit accuracy across the specified operating range.

How does ADC08832IM/NOPB enter low-power mode and what is its typical current draw?

ADC08832IM/NOPB enters low-power mode automatically when the CS pin is driven high. In this state, analog circuitry and digital logic enter static current mode, and the DO pin goes high-impedance. Typical supply current drops to 0.6 mA (3.0 mW at 5V), making it suitable for intermittent-sampling applications such as battery-powered data loggers where duty cycling is employed.

Can ADC08832IM/NOPB interface directly with a microcontroller GPIO without level-shifting?

Yes, ADC08832IM/NOPB features TTL/CMOS-compatible digital I/O: VIH(min) = 2.0 V and VIL(max) = 0.8 V at V_CC = 5 V, ensuring reliable interfacing with standard 5V microcontrollers. Its DI and DO pins tolerate input voltages from GND to V_CC, and the device draws negligible leakage current (<±1 μA), allowing direct connection to MCU GPIOs without series resistors or level translators.