Texas Instruments ADS8862IDGS

Overview

ADS8862IDGS from Texas Instruments is a 16-bit, 680-kSPS single-ended SAR analog-to-digital converter with SPI-compatible serial interface, unipolar input range (0 V to VREF), and micropower operation (4.2 mW at full speed). It features no-latency output, ±1.0 LSB typical INL, and supports daisy-chain configuration for multi-ADC systems in precision instrumentation.

For engineers reviewing the ADS8862IDGS datasheet, ADS8862IDGS pinout, ADS8862IDGS application, or ADS8862IDGS equivalent, this page delivers verified electrical specs, package mapping to VSSOP-10, real-world timing behavior (540 ns acquisition, 500 ns conversion), and validated alternatives for low-power, high-resolution data acquisition designs.

Technical Context

The ADS8862IDGS implements a successive approximation register (SAR) architecture with internal capacitive DAC and track-and-hold, enabling true no-latency conversion and full-scale step settling in 540 ns. Its reference input (2.5 V to 5 V) operates independently of AVDD (2.7 V to 3.6 V) and DVDD (1.65 V to 3.6 V), allowing flexible signal scaling without external amplifiers.

It supports three SPI interface modes - 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain - with SCLK up to 66.6 MHz and built-in busy-indicator bit for host synchronization. The device enters automatic power-down between conversions, drawing only 50 nA during idle.

Key Specifications

Pinout & Package

VSSOP-10 (DGS) package: 3.00 mm × 3.00 mm body, exposed thermal pad not present (unlike VSON variant); requires standard surface-mount reflow profile per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8862IDGS, ADS8864IDRC adds channel count at reduced speed and different thermal handling, while ADS8860IDGS offers higher throughput in identical footprint-both retain the same reference independence and SPI interface behavior critical for design reuse.

Availability

ADS8862IDGS is available at Aetrix Electronics and suitable for automatic test equipment, precision medical instrumentation, and low-power portable measurement systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS8862IDGS 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 ADS8862 belongs to TI's ultra-low-power, high-accuracy SAR ADC portfolio, engineered for applications demanding 16-bit resolution without sacrificing energy efficiency or timing determinism in resource-constrained systems.

FAQ

What is the maximum SCLK frequency supported by the ADS8862IDGS?

The ADS8862IDGS supports SCLK frequencies up to 66.6 MHz under recommended operating conditions (AVDD = 3 V, DVDD = 3 V). This allows full 16-bit data transfer in under 250 ns, enabling tight timing margins in high-throughput systems. The device specifies minimum SCLK period of 15 ns and requires 45–55% duty cycle for reliable operation. Always verify timing with actual PCB trace lengths and load capacitance.

Does the ADS8862IDGS support differential input configurations?

No, the ADS8862IDGS is strictly a single-ended input ADC. Its AINP and AINN pins are not configured as a true differential pair; AINN serves only as the analog ground reference for unipolar operation (0 V to VREF). For differential input capability, TI recommends the ADS8863 (same family, true-differential variant) or ADS8865 (16-bit, 400 kSPS, true-differential).

How does the power consumption of the ADS8862IDGS scale with sample rate?

ADS8862IDGS power scales nearly linearly with throughput: 4.2 mW at 680 kSPS, 0.6 mW at 100 kSPS, and 60 µW at 10 kSPS. This is achieved via automatic power-down between conversions, with only 50 nA quiescent current on AVDD. Designers can dynamically adjust sample rate to match signal bandwidth and minimize average power without firmware overhead.

What decoupling is required for the REF pin on the ADS8862IDGS?

The REF pin of the ADS8862IDGS requires a minimum 10 µF ceramic or tantalum capacitor connected directly between REF and GND, placed as close as possible to the pin. TI recommends using a 10–22 µF value with low ESR (<1 Ω) to maintain reference stability during fast conversion cycles and suppress noise coupling into the analog front-end.

Is the ADS8862IDGS pin-compatible with other devices in the ADS886x family?

Yes, the ADS8862IDGS (VSSOP-10) shares identical pinout and footprint with ADS8860IDGS, ADS8864IDGS, and ADS8866IDGS. All support the same 10-pin VSSOP package, enabling hardware reuse across speed grades (1 MSPS to 100 kSPS) and channel counts (1–2 channels) without PCB redesign.