Texas Instruments ADS8332IBRGER

Overview

ADS8332IBRGER from Texas Instruments is a 16-bit, 500-kSPS, 8-channel unipolar-input successive approximation register (SAR) analog-to-digital converter with integrated 8:1 multiplexer, SPI/DSP-compatible serial interface, and daisy-chain capability. It operates from 2.7 V to 5.5 V analog supply and supports 1.65 V to VA digital I/O voltage. It delivers ±1.2 LSB typical INL and 91.5 dB SNR at 1 kHz for precision data acquisition in industrial sensor interfaces.

For engineers reviewing the ADS8332IBRGER datasheet, ADS8332IBRGER pinout, ADS8332IBRGER application, or ADS8332IBRGER equivalent, key selection considerations include its 8-channel MUX architecture, programmable EOC/INT/CDI pin functionality, Auto-NAP powerdown mode (8.7 mW at 250 kSPS), 4-mm × 4-mm VQFN-24 package, and guaranteed 16-bit no-missing-codes performance over –40°C to +85°C.

Technical Context

The ADS8332IBRGER implements a capacitor-based SAR ADC core with inherent sample-and-hold, supporting both manual and auto-triggered conversion modes via CONVST or global CONVST. Its on-chip 8:1 multiplexer allows flexible channel selection with breakout capability and supports simultaneous sampling across channels when used with external hold capacitors.

It features dual-clock operation: an internal 11 MHz conversion clock (CCLK) or externally derived SCLK (up to 40 MHz at 5 V), enabling independent control of conversion timing and serial data transfer. The EOC/INT/CDI pin provides configurable status signaling and enables daisy-chain configuration for multi-ADC systems without additional logic.

Key Specifications

Pinout & Package

ADS8332IBRGER is housed in a 24-pin VQFN package (RGE) with 4.00 mm × 4.00 mm body size and exposed thermal pad (to be connected to AGND). Pin count and layout are identical to TSSOP-24 but with superior thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8331IBRGER and ADS8688IPWR, the ADS8332IBRGER offers optimal balance of channel density, ultra-low power in Auto-NAP mode, and minimal external component count-making it ideal for compact, battery-aware industrial DAQ where external PGAs are already present.

Availability

ADS8332IBRGER is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, automated test equipment, and magnetometer signal conditioning requiring stable component supply and long-term production continuity.

Supply support for ADS8332IBRGER 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 precision data converter innovation.

The ADS833x family was designed for low-power, high-accuracy data acquisition in space- and energy-constrained industrial and medical systems-emphasizing flexible supply operation, integrated multiplexing, and robust serial interfacing.

FAQ

What is the maximum sampling rate supported by the ADS8332IBRGER?

The ADS8332IBRGER supports a maximum throughput rate of 500 kSPS under specified operating conditions (TA = –40°C to +85°C, VA = 2.7 V to 5.5 V). This rate is maintained regardless of channel count due to its fixed conversion time of 18 CCLK cycles and internal 11-MHz conversion clock. At 500 kSPS, the ADS8332IBRGER achieves 91.5 dB SNR and ±1.2 LSB typical INL-validating its use in demanding real-time acquisition.

Does the ADS8332IBRGER require an external reference voltage?

Yes, the ADS8332IBRGER requires an external reference applied between REF+ and REF– pins. It accepts references from 1.2 V to 4.096 V (e.g., REF3240 or REF5040), with optimal AC performance achieved using a 4.096-V reference at VA = 5 V. The device does not include an internal reference; REF– must be connected to AGND through a dedicated PCB via to maintain PSRR and minimize ground bounce effects on conversion accuracy.

How does the daisy-chain mode work on the ADS8332IBRGER?

In daisy-chain mode, multiple ADS8332IBRGER devices share FS/CS, SCLK, and SDI lines while connecting SDO of one device to CDI (EOC/INT/CDI pin configured as input) of the next. Data is shifted out sequentially during a single frame: the first device outputs its 16-bit result on SDO, which propagates through each subsequent device's CDI input, allowing all conversions to be read back in one SPI transaction. This eliminates the need for individual chip selects and simplifies firmware for multi-ADC systems.

What power-saving modes are available on the ADS8332IBRGER?

The ADS8332IBRGER offers three power-saving modes: Nap mode (325–500 µA), Auto-NAP mode (8.7 mW at 250 kSPS), and Deep Powerdown mode (50–250 nA). Auto-NAP automatically enters low-power state between conversions when SCLK is inactive; Nap mode disables internal clocks while retaining register state; Deep PD shuts down all circuitry except reset detection. All modes retain configuration registers and resume operation within microseconds upon wake-up event (e.g., CONVST pulse or SCLK activity).

Is the ADS8332IBRGER pin-compatible with other devices in the ADS833x family?

Yes, the ADS8332IBRGER is pin-compatible with ADS8331IBRGER in the 24-pin VQFN (RGE) package-the only difference is that pins IN4 through IN7 are No Connect (NC) on the ADS8331IBRGER, while they serve as active analog inputs on the ADS8332IBRGER. Both share identical pin functions for all other signals including CONVST, EOC/INT/CDI, SCLK, SDI, SDO, FS/CS, REF+, REF–, VA, VBD, AGND, DGND, COM, ADCIN, and MUXOUT-enabling drop-in replacement in 4-channel designs.