Texas Instruments ADS8317IDGKR

Overview

ADS8317IDGKR from Texas Instruments is a 16-bit, SAR analog-to-digital converter with differential input, SPI/SSI-compatible serial interface, and microPower operation (2mW at 2.7V/100kHz). It delivers ±1.5LSB max INL, 5LSBPP noise, and 200kSPS throughput in an MSOP-8 package - optimized for battery-powered data acquisition and isolated sensor interfaces.

For engineers reviewing the ADS8317IDGKR datasheet, ADS8317IDGKR pinout, ADS8317IDGKR application, or ADS8317IDGKR equivalent, key selection criteria include its 2.7V–5.5V supply range, VREF programmability (0.1V to VDD/2), low-power shutdown mode (0.3μW), and guaranteed no missing codes across full supply range.

Technical Context

The ADS8317IDGKR implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling single-cycle acquisition without pipeline delay. Its differential input supports bipolar operation with common-mode voltage ranging from –VREF to +VREF relative to –IN.

Conversion is synchronized to an external DCLOCK signal (24kHz–4.8MHz), requiring exactly 22 clock cycles per 16-bit result. The CS/SHDN pin serves dual function: chip select (active-low) and shutdown control (high = power-down), reducing supply current to 0.3μW at 2.7V.

Key Specifications

Pinout & Package

ADS8317IDGKR is housed in an 8-pin MSOP (DGK) package with exposed thermal pad. Pin 1 is REF; pin 4 is GND; pin 5 is CS/SHDN (dual-function); pin 6 is DOUT; pin 7 is DCLOCK; pin 8 is VDD. The thermal pad must be soldered to PCB ground for thermal stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8317IDGKR, ADS8321IDGKR offers 8-bit higher resolution in identical form factor, while ADS8860IDRCT trades package size and reference integration for 5× higher throughput - making ADS8317IDGKR optimal for power-constrained, precision, medium-speed applications.

Availability

ADS8317IDGKR is available at Aetrix Electronics and suitable for battery-operated systems, isolated data acquisition, and remote industrial I/O modules requiring stable component supply and long-term manufacturability.

Supply support for ADS8317IDGKR 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 ADS8317IDGKR belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power data acquisition in portable, isolated, and multichannel industrial systems.

FAQ

What is the maximum sampling rate supported by the ADS8317IDGKR?

The ADS8317IDGKR achieves a maximum throughput rate of 200 kSPS when operated at VDD = 2.7V and fDCLOCK = 4.8 MHz. At VDD = 5V, it supports up to 250 kSPS with fDCLOCK = 6.0 MHz. Each conversion requires exactly 22 DCLOCK cycles, so actual rate is determined by clock frequency and system timing constraints.

Does the ADS8317IDGKR require an external reference voltage?

Yes, the ADS8317IDGKR requires an external reference voltage applied to the REF pin. It accepts any stable voltage from 0.1 V to VDD/2 - for example, 1.25 V at 2.7 V supply or 2.5 V at 5 V supply. The reference directly sets the full-scale differential input range (±VREF), and its current draw scales with sampling rate (e.g., 9–14 μA at 200 kSPS).

How does the CS/SHDN pin function on the ADS8317IDGKR?

The CS/SHDN pin on the ADS8317IDGKR serves dual roles: when driven low, it enables conversion and serial data transfer; when driven high, it places the device in ultra-low-power shutdown mode, drawing only 0.3 μW at 2.7 V. This eliminates the need for external power switches and enables rapid wake-up (<1 μs) for event-triggered sampling.

Is the ADS8317IDGKR pin-compatible with other TI ADCs?

Yes, the ADS8317IDGKR is pin-compatible with the ADS8321 in the MSOP-8 (DGK) package - sharing identical pin numbering, signal functions, and interface timing. This allows direct hardware replacement for higher-resolution applications without PCB redesign, though firmware may require adjustment for 24-bit data handling.

What is the input structure of the ADS8317IDGKR, and how should it be driven?

The ADS8317IDGKR features a fully differential analog input (+IN and –IN) that supports both differential and single-ended configurations. In differential mode, it accepts ±VREF signals; in single-ended mode, –IN is held at a fixed bias (e.g., VREF), and +IN swings ±VREF around that point. Input impedance is 5 GΩ in hold mode and 100–150 Ω during sampling, requiring low-output-impedance drivers or external buffering for high-frequency sources.