Texas Instruments ADS8867IDRCR

Overview

ADS8867IDRCR from Texas Instruments is a 16-bit, 100-kSPS, true-differential SAR analog-to-digital converter with SPI-compatible serial interface, 96 dB SNR, ±1.0 LSB INL (max), and 0.7 mW power dissipation at full speed - designed for precision low-power instrumentation requiring high DC accuracy and noise immunity in battery-operated systems.

For engineers reviewing the ADS8867IDRCR datasheet, ADS8867IDRCR pinout, ADS8867IDRCR application, or ADS8867IDRCR equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in medical and process control systems, and validated alternative options with documented functional and packaging differences.

Technical Context

The ADS8867IDRCR employs a charge-redistribution SAR architecture with integrated sample-and-hold, enabling no-latency output and inherent linearity. Its true-differential input accepts –VREF to +VREF differential swing with 0 V to VREF common-mode range and 90 dB minimum CMRR, eliminating need for external signal conditioning when interfacing with bridge sensors or isolated amplifiers.

Digital interface supports three modes - 3-wire CS, 4-wire CS, and daisy-chain - selected dynamically via DIN level at CONVST rising edge. Conversion timing is internally clocked; SCLK only controls data readout during acquisition phase, decoupling sampling rate from serial bus timing.

Key Specifications

Pinout & Package

ADS8867IDRCR is housed in a 10-pin SON (Small Outline No-Lead) package (DRC), 3.0 mm × 3.0 mm, with exposed thermal pad connected to PCB ground for optimal thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision, low-power SAR ADC applications.

Compared with ADS8867IDRCR, ADS8865IDRCR trades lower power for higher speed in same package, while ADS8887IDRCR increases resolution and accuracy at cost of power, size, and reference drive burden - making ADS8867IDRCR the optimal balance for portable and industrial 16-bit precision applications.

Availability

ADS8867IDRCR is available at Aetrix Electronics and suitable for portable medical devices, industrial process controllers, PLC analog input modules, and battery-powered data loggers requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for ADS8867IDRCR 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 ADS8867IDRCR belongs to TI's 16-/18-bit SAR ADC family engineered for high-accuracy, low-power, true-differential signal acquisition in space-constrained, thermally demanding environments - targeting instrumentation, medical, and process control markets.

FAQ

What is the maximum sampling rate supported by the ADS8867IDRCR?

The ADS8867IDRCR supports a maximum throughput rate of 100 kSPS with no latency. This is its rated full-speed performance under specified conditions (AVDD = 3 V, DVDD = 3 V, VREF = 5 V, TA = –40°C to +85°C). At lower rates - such as 10 kSPS - the ADS8867IDRCR consumes only 70 µW, demonstrating linear power scaling ideal for duty-cycled applications.

Does the ADS8867IDRCR require an external clock for conversion?

No, the ADS8867IDRCR uses an internal conversion clock and does not require an external clock source for sampling. The SCLK signal is used exclusively for serial data readout during the acquisition phase. This architectural separation ensures sampling timing remains immune to digital bus jitter, preserving timing accuracy in noisy environments where ADS8867IDRCR is deployed.

Can the ADS8867IDRCR interface directly with a 1.8-V microcontroller?

Yes, the ADS8867IDRCR supports DVDD from 1.65 V to 3.6 V, making it fully compatible with 1.8-V logic interfaces. Its CMOS digital I/O (DIN, DOUT, SCLK, CONVST) meets VIH/VIL thresholds at 1.8 V (VIH ≥ 1.26 V, VIL ≤ 0.54 V), eliminating need for level shifters when paired with common 1.8-V MCUs - a key advantage confirmed in ADS8867IDRCR electrical characteristics tables.

What is the purpose of the thermal pad on the ADS8867IDRCR SON package?

The exposed thermal pad on the ADS8867IDRCR's SON-10 package must be soldered to a PCB ground plane to ensure proper thermal dissipation and noise immunity. TI specifies θJB = 45.9°C/W for this configuration - critical for maintaining junction temperature within –40°C to +85°C operating range during sustained 100 kSPS operation. Leaving the pad floating degrades both thermal performance and AC specs like SNR.

How does the true-differential input of the ADS8867IDRCR improve noise rejection compared to pseudo-differential inputs?

The ADS8867IDRCR's true-differential input provides 90 dB minimum common-mode rejection ratio (CMRR) across DC to 10 kHz, rejecting coupled noise equally on AINP and AINN. Unlike pseudo-differential architectures that share a single-ended reference, ADS8867IDRCR's fully differential front-end eliminates reliance on precise VCM generation - enabling direct connection to isolated amplifiers or bridge sensors without external bias networks.