Texas Instruments ADS8317IBDGKR

Overview

ADS8317IBDGKR from Texas Instruments is a 16-bit, SAR analog-to-digital converter with differential input, SPI/SSI-compatible serial interface, and microPower operation (4mW at 2.7V/200kSPS). It delivers ±1.5LSB max INL, 5LSBPP noise, and supports reference voltages from 0.1V to VDD/2 - ideal for precision battery-operated data acquisition.

For engineers reviewing the ADS8317IBDGKR datasheet, ADS8317IBDGKR pinout, ADS8317IBDGKR application, or ADS8317IBDGKR equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance over full supply range, low-power shutdown mode (0.3μW), differential input architecture, MSOP-8 package compatibility, and 200kSPS throughput at 2.7V.

Technical Context

The ADS8317IBDGKR 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 and updates after each acquisition cycle to maintain factory-adjusted linearity.

It operates with an external reference (0.1V to VDD/2) and external clock (24kHz–4.8MHz), supporting both single-ended and fully differential analog input configurations. The device uses binary two's complement output format and requires exactly 22 DCLOCK cycles per 16-bit conversion.

Key Specifications

Pinout & Package

ADS8317IBDGKR is housed in an 8-pin MSOP package (DGK) with exposed thermal pad. Pin 1 is REF; pin 4 is GND; pin 5 is CS/SHDN (dual-function chip select/shutdown); pin 8 is VDD. The package supports surface-mount reflow and requires GND connection of the thermal pad 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 ADS8321IDGKR and ADS8860IPWR, the ADS8317IBDGKR uniquely balances 16-bit precision, 200kSPS speed, ultra-low 2.7V operation, and MSOP-8 footprint - making it optimal for space- and power-constrained portable instrumentation where 18-bit resolution is unnecessary.

Availability

ADS8317IBDGKR is available at Aetrix Electronics and suitable for battery-operated data loggers, isolated industrial sensors, and remote vibration monitoring nodes requiring stable component supply and long-term manufacturability.

Supply support for ADS8317IBDGKR 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 and low-power signal chain solutions.

The ADS8317IBDGKR belongs to TI's precision SAR ADC product line, designed specifically for portable, isolated, and multichannel data acquisition systems demanding high resolution, low power, and robust noise immunity.

FAQ

What is the maximum sampling rate supported by the ADS8317IBDGKR?

The ADS8317IBDGKR supports a maximum throughput rate of 200 kSPS when operated at 2.7V with a 4.8MHz DCLOCK. At 5V, its rated maximum is 250 kSPS with a 6.0MHz clock. The device requires exactly 22 DCLOCK cycles per conversion, so actual achievable rate depends on clock frequency and supply voltage configuration. ADS8317IBDGKR maintains full 16-bit performance across this range.

Does the ADS8317IBDGKR require an external reference, and what voltage range is supported?

Yes, the ADS8317IBDGKR requires an external reference applied to the REF pin. It supports reference voltages from 0.1V up to VDD/2 - for example, 1.25V at 2.7V supply or 2.5V at 5V supply. This range directly defines the full-scale differential input span (±VREF) and enables flexible system-level scaling. ADS8317IBDGKR does not include an internal reference.

How does the CS/SHDN pin function on the ADS8317IBDGKR?

The CS/SHDN pin on the ADS8317IBDGKR serves dual functions: when driven low, it acts as chip select enabling serial communication and conversion; when driven high, it places the device into power-down mode, reducing supply current to 0.3μW at 2.7V. This feature enables precise power gating between conversions. ADS8317IBDGKR exits shutdown synchronously on the next falling edge of DCLOCK after CS returns low.

Is the ADS8317IBDGKR pin-compatible with other devices in the same family?

Yes, the ADS8317IBDGKR is pin-compatible with the ADS8321 in the same MSOP-8 (DGK) package. Both share identical pin assignments, timing behavior, and interface protocol, allowing direct substitution where 16-bit resolution suffices. However, ADS8317IBDGKR is not pin-compatible with SON-8 variants (e.g., ADS8317IBDRBR) due to differing package footprints.

What is the noise performance of the ADS8317IBDGKR, and how is it specified?

The ADS8317IBDGKR specifies very low noise at 5 LSBPP (peak-to-peak) under typical conditions. This equates to approximately 50 μVRMS for a 2.5V reference, translating to ~14.6 effective number of bits (ENOB) at 10kHz input frequency. Noise is measured with a DC input and 8192-point FFT; ADS8317IBDGKR maintains this performance across its full operating temperature range (–40°C to +85°C).