Texas Instruments ADS8860IDGSR

Overview

ADS8860IDGSR from Texas Instruments is a 16-bit, 1-MSPS, single-ended input SAR analog-to-digital converter with SPI-compatible serial interface, unipolar input range (0 V to VREF), and micropower operation. It features no-latency output, 93 dB SNR, ±2.0 LSB max INL, and operates from AVDD = 2.7–3.6 V, DVDD = 1.65–3.6 V, and REF = 2.5–5 V. It is used in precision medical instruments and low-power battery-operated data acquisition systems.

For engineers reviewing the ADS8860IDGSR datasheet, ADS8860IDGSR pinout, ADS8860IDGSR application, or ADS8860IDGSR equivalent, key selection considerations include its 1-MSPS throughput with 5.5 mW power at full speed, daisy-chain capability for multi-channel systems, independent dual-supply operation (AVDD/DVDD), and reference voltage flexibility up to 5 V without scaling circuitry.

Technical Context

The ADS8860IDGSR implements a successive approximation register (SAR) architecture with internal capacitive DAC and track-and-hold, delivering true 16-bit no-missing-code performance. Its conversion time is 500–710 ns, with full-scale step settling to 16 bits in 290 ns, enabling precise timing-critical sampling in high-resolution instrumentation.

It supports three serial interface modes - 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain - all SPI-compatible and configurable via DIN level at conversion start. The busy-indicator bit option simplifies synchronization with digital hosts such as microcontrollers or FPGAs.

Key Specifications

Pinout & Package

The ADS8860IDGSR is packaged in a 10-pin VSSOP (DGS) with 3.00 mm × 3.00 mm body size and exposed thermal pad (not electrically connected). Pin functions are validated per TI SBAS569B Rev B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDGSR, ADS8864IDRCR offers lower speed but superior common-mode rejection (100 dB CMRR), while ADS8862IDRCR provides faster sampling but removes daisy-chain flexibility - making ADS8860IDGSR optimal for cost-sensitive, single-ended, multi-device SPI-bus constrained designs.

Availability

ADS8860IDGSR is available at Aetrix Electronics and suitable for automatic test equipment, precision instrumentation, and portable medical devices requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for ADS8860IDGSR 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, power management, and signal chain solutions.

The ADS8860IDGSR belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power, and space-constrained applications including portable instrumentation, industrial sensing, and medical diagnostics.

FAQ

What is the maximum sample rate of the ADS8860IDGSR?

The ADS8860IDGSR achieves a maximum throughput rate of 1 MSPS with no latency output. At this rate, conversion time is 500–710 ns and acquisition time is 290 ns. The device maintains full 16-bit performance across its entire operating temperature range (–40°C to +85°C), and timing parameters are specified for AVDD = 3 V, DVDD = 3 V, and VREF = 5 V per SBAS569B Rev B.

Does the ADS8860IDGSR support daisy-chain configuration?

Yes, the ADS8860IDGSR supports daisy-chain operation for cascading multiple devices on a single SPI bus. In this mode, DOUT of one device connects to DIN of the next, with shared SCLK and CONVST. Configuration is set by DIN level at conversion start, and timing parameters (e.g., tsu-DI-CK = 1.5 ns) are explicitly defined in Section 7.8 of the ADS8860IDGSR datasheet.

What are the supply voltage requirements for ADS8860IDGSR?

The ADS8860IDGSR requires two independent supplies: AVDD = 2.7 V to 3.6 V for analog circuitry, and DVDD = 1.65 V to 3.6 V for digital I/O - with no dependency between them. REF accepts 2.5 V to 5 V. All supplies must be decoupled: 1 µF for AVDD/DVDD, and ≥10 µF for REF. These ranges are validated across –40°C to +85°C per Recommended Operating Conditions (Section 7.3).

What is the input configuration of the ADS8860IDGSR?

The ADS8860IDGSR features a unipolar, single-ended input architecture with AINP referenced to AINN (tied to GND). It does not support true differential input. The input range is 0 V to VREF, with an extended operating range of –0.1 V to VREF + 0.1 V. Input capacitance is 59 pF, and leakage current is ≤5 nA during acquisition - confirmed in Electrical Characteristics (Section 7.5).

How does power consumption scale with sample rate in ADS8860IDGSR?

ADS8860IDGSR power consumption scales linearly with throughput: 5.5 mW at 1 MSPS, 0.55 mW at 100 kSPS, and 55 µW at 10 kSPS. This behavior stems from its micropower SAR architecture, where internal circuitry activates only during conversion. Power-down current is 50 nA - verified in Section 7.5 under "Device power-down current" with AVDD = 3 V.