Texas Instruments ADS8332IRGER

Overview

ADS8332IRGER from Texas Instruments is a 16-bit, 500-kSPS successive approximation register (SAR) analog-to-digital converter with integrated 8-channel unipolar multiplexer, on-chip conversion clock, and SPI/DSP-compatible serial interface. It operates from 2.7 V to 5.5 V analog supply, achieves ±1.2 LSB typical INL and 91.5 dB SNR at 1 kHz, and targets precision data acquisition in industrial sensor interfaces.

For engineers reviewing the ADS8332IRGER datasheet, ADS8332IRGER pinout, ADS8332IRGER application, or ADS8332IRGER equivalent, key selection considerations include its 8-channel mux architecture, daisy-chain capability, deep power-down mode (250 nA), 24-pin VQFN package, and support for external reference voltages from 1.2 V to 4.096 V.

Technical Context

The ADS8332IRGER implements a capacitor-based SAR ADC core with inherent sample-and-hold, enabling single-cycle 16-bit conversions at up to 500 kSPS. Its flexible trigger system supports both manual and auto-trigger modes, and global CONVST allows synchronized sampling across multiple devices independent of CS.

It features programmable EOC/INT polarity, three powerdown modes (Deep, Nap, Auto-NAP), and dual-clock operation-internal CCLK (10.9–12.6 MHz at 5 V) or external SCLK used as I/O clock only (up to 40 MHz) or shared as both I/O and conversion clock (up to 21 MHz).

Key Specifications

Pinout & Package

The ADS8332IRGER is housed in a 24-pin VQFN (RGE) package with 4.00 mm × 4.00 mm body size and exposed thermal pad (to be connected to AGND). Pin count and layout match the TSSOP variant for design flexibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS8331IRGER, the ADS8332IRGER adds four more analog inputs without increasing package size or power; versus ADS8688IPWR, it trades raw speed and internal reference for superior multi-device coordination, lower quiescent current, and smaller VQFN footprint.

Availability

ADS8332IRGER is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and automated test equipment requiring stable component supply and long-term production continuity.

Supply support for ADS8332IRGER 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The ADS833x family was designed specifically for low-power, high-precision data acquisition in space- and energy-constrained systems where channel density, serial interface flexibility, and thermal robustness are critical.

FAQ

What is the maximum sampling rate supported by the ADS8332IRGER?

The ADS8332IRGER supports a maximum throughput rate of 500 kSPS across its full operating temperature range (–40°C to +85°C). This rate is achievable with either internal CCLK or external SCLK used as both I/O and conversion clock, and is specified with VA = 2.7 V or 5 V and appropriate reference voltage. The device maintains 16-bit no-missing-codes performance at this rate.

Does the ADS8332IRGER require an external reference voltage?

Yes, the ADS8332IRGER requires an external reference voltage applied between REF+ and REF– pins. It accepts reference voltages from 1.2 V to 4.096 V (or up to VA), and performance specifications-including INL, SNR, and THD-are guaranteed only when using a stable, low-noise reference such as the REF3240. No internal reference is provided.

Can multiple ADS8332IRGER devices be connected in daisy-chain mode?

Yes, the ADS8332IRGER supports daisy-chain operation using the FS/CS, SCLK, SDI, and SDO pins. In this configuration, the SDO of one device connects to the SDI of the next, allowing sequential readout of conversion results from multiple converters using a single host SPI interface and minimal GPIO usage.

What power-saving modes does the ADS8332IRGER offer?

The ADS8332IRGER offers three configurable powerdown modes: Deep PD (250 nA), Nap (390–500 μA), and Auto-NAP (8.72 mW at 250 kSPS). These modes are controlled via SPI commands or hardware pins, and all retain register settings. Deep PD is ideal for standby; Auto-NAP automatically enters low-power state between conversions to optimize average power in burst-mode applications.

Is the ADS8332IRGER pin-compatible with the ADS8331IRGER?

Yes, the ADS8332IRGER is pin-compatible with the ADS8331IRGER in both VQFN (RGE) and TSSOP (PW) packages. They share identical pin functions, electrical characteristics, and timing behavior. The only difference is that ADS8332IRGER exposes eight INx pins (IN[0:7]), while ADS8331IRGER provides only four (IN[0:3]); unused INx pins on ADS8332IRGER must be tied to AGND or left floating per datasheet guidance.