Texas Instruments ADS8885IDRCR

Overview

ADS8885IDRCR from Texas Instruments is an 18-bit, 400-kSPS true-differential SAR analog-to-digital converter with no latency output, SPI-compatible serial interface, and 100 dB SNR at 1 kHz. 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 2.6 mW power dissipation at full speed. It is used in precision medical instrumentation requiring high-resolution, low-noise signal acquisition.

For engineers reviewing the ADS8885IDRCR datasheet, ADS8885IDRCR pinout, ADS8885IDRCR application, or ADS8885IDRCR equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, confirmed alternative parts for system-level trade-offs, and supply-chain-ready availability details - all grounded in TI's SBAS568A datasheet (December 2013).

Technical Context

The ADS8885IDRCR implements a charge-redistribution SAR architecture with integrated sample-and-hold, enabling true-differential input sampling without external front-end scaling. Its internal clock drives conversion independently of SCLK, and acquisition occurs during automatic power-down between conversions.

It supports three digital interface modes - 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain - all with optional busy indicator bit. The device features a unique common-mode voltage detection block allowing VCM anywhere from 0 V to VREF while maintaining ≥90 dB CMRR, unlike conventional differential SAR ADCs constrained near mid-scale.

Key Specifications

Pinout & Package

ADS8885IDRCR is packaged in a 10-pin SON (Small Outline No-lead) package (DRC), thermally enhanced with an exposed pad connected to PCB ground. Pin pitch is 0.5 mm; body size is 3.0 mm × 3.0 mm × 0.9 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8885IDRCR, ADS8865IDRCT trades 2 bits of resolution and 6 dB SNR for lower cost and identical integration, while ADS8881IPWR delivers 2.5× higher throughput at the expense of package size, interface flexibility, and power efficiency at low speeds.

Availability

ADS8885IDRCR is available at Aetrix Electronics and suitable for precision medical instrumentation, industrial process control systems, and portable battery-powered test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for ADS8885IDRCR 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The ADS8885IDRCR belongs to TI's 18-bit SAR ADC family designed for high-accuracy, low-power, true-differential signal acquisition in medical, test, and industrial applications where resolution, noise, and power scalability are critical.

FAQ

What is the maximum sample rate of the ADS8885IDRCR?

The ADS8885IDRCR achieves a maximum throughput rate of 400 kSPS with no latency output. This is specified under conditions of AVDD = 3 V, DVDD = 3 V, VREF = 5 V, and fSAMPLE = 400 kSPS. Conversion time ranges from 500 ns to 1300 ns, and acquisition time is fixed at 1200 ns, enabling deterministic timing for real-time control loops.

Does the ADS8885IDRCR support true-differential input with variable common-mode voltage?

Yes, the ADS8885IDRCR supports true-differential input with a common-mode voltage (VCM) ranging from 0 V to VREF, maintaining ≥90 dB CMRR across that range. Unlike conventional SAR ADCs, its internal common-mode detection block removes the restriction of fixing VCM near VREF/2, allowing direct interfacing with unconditioned differential sensors such as strain gauges and isolated amplifiers.

What digital interface options does the ADS8885IDRCR offer?

The ADS8885IDRCR supports three SPI-compatible interface configurations: 3-wire mode (CONVST as chip select), 4-wire mode (DIN as chip select), and daisy-chain mode for cascading multiple devices. All modes support optional busy indicator bit and operate up to 16 MHz SCLK, with timing parameters fully characterized across –40°C to +85°C.

What is the power consumption of the ADS8885IDRCR at different sample rates?

The ADS8885IDRCR scales power linearly with throughput: 2.6 mW at 400 kSPS, 0.65 mW at 100 kSPS, and 65 µW at 10 kSPS (all at AVDD = 3 V). Power-down current is 50 nA. This scalability enables firmware-driven energy optimization in battery-powered instruments without sacrificing resolution or accuracy.

Which package does the ADS8885IDRCR use, and what are its thermal characteristics?

The ADS8885IDRCR uses the SON-10 (DRC) package - a 3.0 mm × 3.0 mm, 0.5 mm pitch, thermally enhanced no-lead package with exposed thermal pad. Its junction-to-board thermal resistance (θJB) is 45.9 °C/W, and junction-to-ambient (θJA) is 111.1 °C/W, enabling reliable operation up to +85°C ambient with standard PCB copper pour under the thermal pad.