Texas Instruments ADS8883IDGSR

Overview

ADS8883IDGSR from Texas Instruments is an 18-bit, 680-kSPS true-differential SAR analog-to-digital converter with no-latency output, 100 dB SNR, ±3.0 LSB max INL, and SPI-compatible serial interface. It operates from 2.7 V to 3.6 V AVDD and 1.65 V to 3.6 V DVDD, supports –VREF to +VREF differential input range, and delivers 4.2 mW power dissipation at full speed - used in precision instrumentation and low-power medical sensors.

For engineers reviewing the ADS8883IDGSR datasheet, ADS8883IDGSR pinout, ADS8883IDGSR application, or ADS8883IDGSR equivalent, this page provides verified technical context, validated pin functions, confirmed true-differential input behavior, real-world timing constraints (540 ns acquisition, 500–930 ns conversion), and accurate alternative part comparisons for high-accuracy signal acquisition designs.

Technical Context

The ADS8883IDGSR implements a charge-redistribution SAR architecture with integrated sample-and-hold, enabling true-differential input sampling across AINP and AINN with independent common-mode voltage support from 0 V to VREF. Its internal clock drives conversion without external timing dependency, and acquisition occurs during automatic power-down between conversions.

Digital interface supports three modes: 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain - all SPI-compatible with SCLK up to 36 MHz and optional busy indicator bit. Input structure includes 55-pF sampling capacitors per channel and ESD protection diodes to REF/GND, requiring strict adherence to absolute input voltage limits (–0.1 V to VREF + 0.1 V).

Key Specifications

Pinout & Package

ADS8883IDGSR is packaged in a 10-pin MSOP (DGS) with exposed thermal pad. Pin 1 is REF; pin 5 is GND (shared analog/digital ground); pin 10 is DVDD. Thermal pad must be connected to PCB ground for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution SAR ADC applications.

Compared with ADS8883IDGSR, ADS8863IDRCT trades 2 bits of resolution for lower cost and identical footprint, while ADS8881IDGS extends speed by 47% at the expense of 55% higher active power - both require no PCB changes but differ in precision/speed/power trade-offs.

Availability

ADS8883IDGSR is available at Aetrix Electronics and suitable for high-precision instrumentation, battery-powered medical sensors, and industrial process control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS8883IDGSR 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and low-power design.

The ADS8883IDGSR belongs to TI's 18-bit SAR ADC family designed for high-accuracy, low-power signal acquisition in space-constrained, battery-operated, and industrial-grade measurement systems.

FAQ

What is the maximum recommended reference voltage for ADS8883IDGSR?

The ADS8883IDGSR supports an external reference voltage from 2.5 V to 5 V. The maximum rated value is 5 V, with absolute maximum rating of 5.7 V on the REF pin. Operating at 5 V maximizes dynamic range and SNR (100 dB typical), and the reference voltage setting is independent of AVDD, allowing use with 3 V analog supplies without scaling loss.

Does ADS8883IDGSR require an external clock source?

No, ADS8883IDGSR does not require an external clock source. It uses an internal conversion clock and relies solely on the SCLK signal from the host processor for serial data transfer timing. The internal clock drives the SAR logic and sample-and-hold operation, ensuring consistent conversion time (500–930 ns) regardless of SCLK frequency.

Can ADS8883IDGSR interface directly with a 1.8 V FPGA I/O bank?

Yes, ADS8883IDGSR can interface directly with a 1.8 V FPGA I/O bank. Its DVDD supply range is 1.65 V to 3.6 V, and digital input thresholds scale with DVDD (VIH = 0.7 × DVDD min). At DVDD = 1.8 V, VIH is 1.26 V - comfortably met by standard 1.8 V CMOS outputs, and VOH/VOL specifications guarantee clean logic levels into the FPGA.

What is the purpose of the thermal pad on ADS8883IDGSR?

The exposed thermal pad on ADS8883IDGSR (MSOP-10 package) serves dual purposes: thermal dissipation and grounding. Texas Instruments recommends connecting it directly to PCB ground plane to reduce junction-to-board thermal resistance (θJB = 72.2°C/W) and suppress noise coupling into analog sections. Leaving it unconnected degrades both thermal performance and AC specs like SNR and CMRR.

How does ADS8883IDGSR handle common-mode voltage variation during conversion?

ADS8883IDGSR incorporates a dedicated common-mode voltage detection and rejection block that allows VCM (average of AINP and AINN) to vary from 0 V to VREF without performance degradation. Unlike conventional differential SAR ADCs, it maintains ≥90 dB CMRR across this full range, enabling direct digitization of sensor outputs with floating or variable common-mode offsets - such as strain gauge bridges powered from non-rail-referenced sources.