Texas Instruments ADS8317IDGKT

Overview

ADS8317IDGKT from Texas Instruments is a 16-bit, SAR analog-to-digital converter with differential input, SPI/SSI-compatible serial interface, and microPower operation (10mW at 5V/250kSPS). It delivers ±1.5LSB max INL, 5LSBPP noise, and 250kSPS throughput in an MSOP-8 package - optimized for battery-operated data acquisition and isolated sensing systems.

For engineers reviewing the ADS8317IDGKT datasheet, ADS8317IDGKT pinout, ADS8317IDGKT application, or ADS8317IDGKT equivalent, key selection criteria include its 2.7V–5.5V supply range, 0.1V–VDD/2 programmable reference, differential input architecture, low-power shutdown mode (0.6μW), and compatibility with precision DC-coupled signal chains requiring no missing codes across full supply range.

Technical Context

The ADS8317IDGKT implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling single-cycle acquisition and conversion without pipeline delay. Its internal trim procedure stores calibration in non-volatile memory, restoring factory linearity after each power cycle.

It supports synchronous serial communication via CS/SHDN, DCLOCK, and DOUT pins using LSB-first binary two's complement format. The differential analog front-end accepts inputs from –VREF to +VREF with common-mode range up to VREF, and reference current scales linearly with sampling rate (e.g., 35–52μA at 250kSPS).

Key Specifications

Pinout & Package

ADS8317IDGKT is housed in an 8-pin MSOP package (DGK) with exposed thermal pad. Pin 4 is GND; Pin 8 is VDD; Pins 2 and 3 form the differential analog input (+IN, –IN); Pin 1 is REF; Pin 5 controls chip select/shutdown; Pin 6 outputs serial data; Pin 7 accepts the conversion clock.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8321IDGKT, the ADS8317IDGKT trades 80 kSPS throughput and 0.5 LSB INL for lower power at mid-range sampling rates and native differential input capability; versus ADS8318IDGKT, it adds differential input flexibility and 50 kSPS higher throughput at modest power premium.

Availability

ADS8317IDGKT is available at Aetrix Electronics and suitable for battery-operated systems, isolated data acquisition, remote vibration monitoring, and portable medical instrumentation requiring stable component supply and long-term production continuity.

Supply support for ADS8317IDGKT 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 ADS8317IDGKT belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, and small-footprint applications in portable, isolated, and remote sensing systems.

FAQ

What is the maximum sampling rate supported by the ADS8317IDGKT?

The ADS8317IDGKT supports a maximum throughput rate of 250 kSPS when operated at 5 V with a 6 MHz DCLOCK signal. At 2.7 V, the maximum rate is 200 kSPS due to reduced clock frequency limit (4.8 MHz). Each conversion requires 22–24 DCLOCK cycles, and the device exhibits no pipeline delay - DOUT delivers data for the currently active conversion.

Does the ADS8317IDGKT require an external reference voltage?

Yes, the ADS8317IDGKT requires an external reference voltage applied to the REF pin. It accepts any stable voltage from 0.1 V to VDD/2 (e.g., 1.25 V at 2.7 V supply or 2.5 V at 5 V supply). The reference sets the full-scale input range (±VREF differential), and reference current scales with sampling rate - 35–52 μA at 250 kSPS with 5 V supply.

How does the CS/SHDN pin function on the ADS8317IDGKT?

The CS/SHDN pin on the ADS8317IDGKT serves dual functions: when pulled low, it acts as chip select to initiate conversions and enable serial data output on DOUT; when driven high, it places the device into ultra-low-power shutdown mode, reducing supply current to just 0.6 μW at 5 V. No external pull-up is required, and the pin is LVCMOS-compatible across the full 2.7 V–5.5 V supply range.

What package type is used for the ADS8317IDGKT?

The ADS8317IDGKT is packaged in an 8-pin MSOP (Mini Small Outline Package) with designation DGK. It measures 3.0 mm × 3.0 mm × 1.0 mm and features an exposed thermal pad on the bottom for enhanced thermal dissipation. This package is RoHS-compliant and compatible with standard reflow soldering processes.

Is the ADS8317IDGKT pin-compatible with other devices in the same family?

Yes, the ADS8317IDGKT is explicitly pin-compatible with the ADS8321IDGKT, sharing identical MSOP-8 pinout, terminal functions, and SPI interface timing. This allows direct substitution in existing layouts when higher throughput (330 kSPS) or tighter INL (±1 LSB) is needed - though firmware may require minor adjustments for the extended timing window of the ADS8321IDGKT.