Texas Instruments ADS8887IDRCR

Overview

ADS8887IDRCR from Texas Instruments is an 18-bit, 100-kSPS, true-differential SAR analog-to-digital converter with SPI-compatible serial interface, 100 dB SNR, ±3.0 LSB max INL, and 0.7 mW power dissipation at full speed-designed for precision instrumentation requiring high-resolution signal capture in low-power, battery-operated systems.

For engineers reviewing the ADS8887IDRCR datasheet, ADS8887IDRCR pinout, ADS8887IDRCR application, or ADS8887IDRCR equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for sensor interface, medical data acquisition, and industrial process control designs.

Technical Context

The ADS8887IDRCR implements a charge-redistribution SAR architecture with integrated sample-and-hold, supporting true-differential input (–VREF to +VREF) and wide common-mode range (0 V to VREF) with ≥90 dB CMRR. Its internal conversion clock eliminates external timing dependencies, while acquisition and conversion phases are strictly separated to ensure no latency output.

Digital interface flexibility includes 3-wire CS mode (CONVST as chip select), 4-wire CS mode (DIN as chip select), and daisy-chain operation-each with defined setup/hold timing (e.g., tsu-DI-CNV = 7.5 ns, th-CK-CNV = 5 ns). Power scales linearly with throughput: 70 µW at 10 kSPS, 0.7 mW at 100 kSPS.

Key Specifications

Pinout & Package

ADS8887IDRCR is housed in a 10-pin SON (Small Outline No-Lead) package (DRC), featuring an exposed thermal pad connected to PCB ground for enhanced thermal performance (θJCbot = N/A, θJB = 45.9°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8887IDRCR, ADS8867IDRCT trades 2 bits of resolution and 8 dB SNR for lower cost and identical layout compatibility, while ADS8885IPWR delivers 4× throughput at the expense of package size and interface flexibility-making ADS8887IDRCR optimal for space-constrained, battery-powered 18-bit precision systems.

Availability

ADS8887IDRCR is available at Aetrix Electronics and suitable for precision instrumentation, portable medical diagnostics, and industrial process control requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS8887IDRCR 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 low-power design.

The ADS8887IDRCR belongs to TI's 18-bit SAR ADC family engineered for high-resolution, low-power, true-differential signal acquisition in portable and industrial measurement systems-emphasizing accuracy, noise immunity, and interface simplicity.

FAQ

What is the maximum recommended reference voltage for ADS8887IDRCR?

The ADS8887IDRCR supports an external reference voltage from 2.5 V to 5 V. The maximum rated value is 5 V, as specified in the Absolute Maximum Ratings table. Exceeding 5 V on the REF pin may cause permanent damage. At 5 V reference, the device achieves its full 100 dB SNR and ±VREF true-differential input range. Always use ≥10 µF ceramic decoupling capacitance at the REF pin to maintain stability during capacitor-switching events.

Does ADS8887IDRCR require an external clock for conversion?

No, ADS8887IDRCR uses an internal conversion clock and does not require an external clock source for the analog-to-digital conversion process. An external SCLK is only needed for serial data readout after conversion completes. This simplifies system timing design and eliminates jitter sensitivity in the conversion phase-critical for maintaining 100 dB SNR. The SCLK frequency can go up to 16 MHz for fast data retrieval.

Can ADS8887IDRCR interface directly with a 1.8-V microcontroller?

Yes, ADS8887IDRCR supports DVDD from 1.65 V to 3.6 V, making it fully compatible with 1.8-V logic systems. Its digital I/O thresholds scale with DVDD (e.g., VIH = 0.7 × DVDD), and output drive strength meets CMOS specifications at 1.8 V. Ensure proper decoupling (1 µF) on DVDD and maintain clean ground separation between analog and digital sections to preserve 100 dB SNR performance.

What is the purpose of the thermal pad on the ADS8887IDRCR SON-10 package?

The exposed thermal pad on the ADS8887IDRCR (DRC package) is electrically connected to GND and serves as the primary heat dissipation path. Texas Instruments specifies θJB = 45.9°C/W, indicating significantly better board-level thermal resistance than the MSOP-10 variant (θJB = 72.2°C/W). It must be soldered to a PCB ground plane with adequate thermal vias to maintain junction temperature within –40°C to +85°C operating limits under continuous 100-kSPS operation.

How does the ADS8887IDRCR handle common-mode voltage variation across its input pins?

The ADS8887IDRCR features a dedicated common-mode voltage detection and rejection block that allows AINP and AINN to operate with any common-mode voltage from 0 V to VREF-unlike conventional differential SAR ADCs limited to ~10% mid-scale deviation. This enables direct connection to sensors like Wheatstone bridges or current-sense amplifiers without level-shifting circuitry. Performance metrics (e.g., 90 dB CMRR min) remain guaranteed across the full 0–VREF range.