Texas Instruments ADS8332IRGET

Overview

ADS8332IRGET 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, delivers ±1.2 LSB typical INL at 2.7 V, and supports daisy-chain configuration for multi-ADC systems in industrial data acquisition.

For engineers reviewing the ADS8332IRGET datasheet, ADS8332IRGET pinout, ADS8332IRGET application, or ADS8332IRGET equivalent, key selection criteria include its 8-channel MUX architecture, 500-kSPS throughput with auto-trigger/manual-trigger modes, deep power-down current of 80 nA, and compatibility with 1.65 V–5 V digital I/O supply - critical for low-power embedded sensor interfaces and precision transducer signal chains.

Technical Context

The ADS8332IRGET implements a capacitor-based SAR ADC core with inherent sample-and-hold, supporting both manual and auto-triggered conversions via CONVST or global CONVST independent of CS. Its internal 11.5 MHz conversion clock (CCLK) enables deterministic 18-cycle conversion time, while flexible timing allows SCLK up to 40 MHz (at 5 V) for high-speed serial readout.

It features programmable EOC/INT/CDI functionality, three powerdown modes (Deep, Nap, Auto-NAP), and a 24-pin VQFN package with exposed thermal pad tied to AGND. The device supports unipolar input ranges up to 4.096 V (REF+ to REF−), with input leakage <±1 nA and crosstalk >119 dB at 1 kHz - enabling high-fidelity channel-to-channel isolation in multi-sensor monitoring.

Key Specifications

Pinout & Package

ADS8332IRGET is housed in a 24-pin RGE (VQFN) package with 4.00 mm × 4.00 mm body size and an exposed thermal pad on the bottom side, which must be connected to analog ground for optimal thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8332IRGET, ADS8327IRHBT offers identical speed and resolution but fewer channels and no daisy-chain capability, while ADS8688IPWR adds integrated signal conditioning at the expense of higher quiescent current and larger footprint - making ADS8332IRGET optimal for space-constrained, multi-node precision DAQ where external reference and gain stages are already present.

Availability

ADS8332IRGET is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and transducer interface modules requiring stable component supply and long-term production continuity.

Supply support for ADS8332IRGET 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 signal chain solutions.

The ADS8332IRGET belongs to TI's low-power, high-speed SAR ADC family designed for precision data acquisition in industrial, medical, and test equipment - emphasizing low noise, flexible power management, and robust serial interface interoperability.

FAQ

What is the maximum sampling rate supported by the ADS8332IRGET?

The ADS8332IRGET supports a maximum sampling rate of 500 kSPS across all 8 input channels. This throughput is achieved using the internal 11.5 MHz conversion clock and is fully specified over the –40°C to +85°C industrial temperature range. At this rate, the device completes each 16-bit conversion in exactly 18 CCLK cycles, enabling deterministic timing for real-time control loops and synchronized multi-channel acquisition in the ADS8332IRGET.

Does the ADS8332IRGET require an external reference voltage?

Yes, the ADS8332IRGET requires an external reference voltage applied between REF+ and REF− pins. It supports reference ranges from 1.2 V to 4.096 V, with typical operation at 2.5 V (for 2.7 V supply) or 4.096 V (for 5 V supply). The device does not include an internal reference, so precision external references like the REF3240 are recommended to maintain ±1.2 LSB INL performance in the ADS8332IRGET.

Can the ADS8332IRGET operate with a 1.8-V digital interface supply?

Yes, the ADS8332IRGET supports VBD from 1.65 V to VA, making it fully compatible with 1.8 V digital I/O domains. When VBD = 1.8 V, VIH is 1.44 V min and VOL is 0.4 V max, ensuring reliable logic-level interfacing with 1.8 V FPGAs or microcontrollers without level-shifting circuitry - a key design advantage confirmed in the ADS8332IRGET electrical characteristics tables.

How does the daisy-chain mode function on the ADS8332IRGET?

In daisy-chain mode, the ADS8332IRGET uses the EOC/INT/CDI pin as a chain data input (CDI) and SDO as the serial output, allowing multiple devices to share a single SPI bus. Data from each ADS8332IRGET shifts out sequentially on one SDO line, reducing host MCU pin count and PCB routing complexity. This mode is enabled via configuration register settings and is fully supported in the ADS8332IRGET hardware design.

What power-saving modes are available on the ADS8332IRGET?

The ADS8332IRGET offers three power-saving modes: Deep Powerdown (80–250 nA), Nap Mode (390–500 µA), and Auto-NAP (4.2 mA at 250 kSPS). These are controlled via SPI commands or hardware pins and allow dynamic adjustment based on acquisition duty cycle - critical for extending battery life in portable instrumentation using the ADS8332IRGET.