Texas Instruments ADS8862IDRCR

Overview

ADS8862IDRCR from Texas Instruments is a 16-bit, 680-kSPS single-ended SAR analog-to-digital converter with SPI-compatible serial interface, 93 dB SNR, ±2.0 LSB max INL, and 4.2 mW power dissipation at full speed - deployed in precision medical instrumentation and battery-powered ATE systems.

For engineers reviewing the ADS8862IDRCR datasheet, ADS8862IDRCR pinout, ADS8862IDRCR application, or ADS8862IDRCR equivalent, key selection criteria include unipolar input range (0 V to VREF), independent AVDD/DVDD/REF supply domains, daisy-chain capability, no-latency output, and VSON-10 thermal-pad package for high-density signal acquisition designs.

Technical Context

The ADS8862IDRCR implements a successive approximation register (SAR) architecture with internal charge redistribution, enabling true no-latency conversion and full-scale step settling in 540 ns. It supports three interface modes - 3-wire CS, 4-wire CS, and daisy-chain - all synchronized to SCLK up to 66.6 MHz.

Its analog front-end accepts single-ended unipolar inputs (AINP referenced to AINN = GND), with input range extending from –0.1 V to VREF + 0.1 V. Reference independence (2.5 V–5 V REF, decoupled via ≥10 µF capacitor) allows flexible signal scaling without external gain stages.

Key Specifications

Pinout & Package

VSON-10 (DRC) package: 3.0 mm × 3.0 mm body with exposed thermal pad (connected to PCB ground per TI recommendation); suitable for space-constrained, thermally demanding PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8864IDRCR and ADS8860IDRCR, the ADS8862IDRCR provides the optimal combination of single-channel precision, micropower efficiency at mid-speed, and minimal board area - making it the preferred choice for space- and energy-constrained 16-bit digitization where channel count and extreme throughput are secondary.

Availability

ADS8862IDRCR is available at Aetrix Electronics and suitable for automatic test equipment, precision medical instrumentation, and low-power portable instruments requiring stable component supply throughout design-in, prototyping, and volume production.

Supply support for ADS8862IDRCR 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 signal chain solutions.

The ADS8862 belongs to TI's ultra-low-power, high-precision SAR ADC family designed specifically for battery-operated test and measurement, medical, and process control applications demanding 16-bit accuracy without latency or excessive power draw.

FAQ

What is the maximum supported SCLK frequency for ADS8862IDRCR?

The ADS8862IDRCR supports SCLK frequencies up to 66.6 MHz in all interface modes (3-wire, 4-wire, and daisy-chain), as specified in the Timing Requirements tables of the SBAS570B datasheet. This allows high-speed data transfer while maintaining robust timing margins across temperature and voltage ranges. The ADS8862IDRCR's internal logic is fully characterized to operate reliably at this maximum clock rate under recommended conditions (AVDD = 3 V, DVDD = 3 V, TA = –40°C to +85°C).

Does ADS8862IDRCR support differential input configurations?

No, the ADS8862IDRCR is explicitly a single-ended input ADC. Its AINN pin is internally tied to GND and functions solely as the reference point for AINP; it does not support true differential or pseudo-differential input modes. The device datasheet confirms this in the Description section and Device Functional Modes - unlike the ADS8863 (differential) or ADS8867 (true-differential) variants in the same family.

What decoupling capacitance is required at the REF pin of ADS8862IDRCR?

The ADS8862IDRCR requires a minimum 10 µF capacitor at the REF pin, with 22 µF recommended for optimal performance, as stated in Section 7.5 Electrical Characteristics. This bulk capacitance stabilizes the reference during conversion and suppresses noise coupling from AVDD or digital switching. TI further recommends using a low-ESR ceramic capacitor placed as close as possible to the REF pin and GND.

Is the thermal pad on the ADS8862IDRCR package electrically connected?

Yes, the exposed thermal pad on the ADS8862IDRCR (VSON-10, DRC package) is internally connected to GND. Texas Instruments' datasheet explicitly states that the thermal pad must be soldered to the PCB ground plane to ensure proper thermal dissipation and electrical stability. Failure to connect the pad may degrade thermal performance and increase noise susceptibility.

Can ADS8862IDRCR operate with AVDD = 2.7 V and REF = 5 V simultaneously?

Yes, the ADS8862IDRCR is expressly designed to support AVDD as low as 2.7 V while accepting REF up to 5 V - a key feature highlighted in the Features and Description sections. This independence allows direct use of high-accuracy 5 V references (e.g., REF5050) even when the analog supply is constrained to lower voltages for power savings, without requiring level-shifting circuitry or external buffers.