Texas Instruments ADS8517IBPWR

Overview

ADS8517IBPWR from Texas Instruments is a 16-bit, 200-kSPS successive approximation register (SAR) analog-to-digital converter with integrated 2.5-V reference, high-impedance ±10 V/0–5 V/0–4 V input ranges, parallel/serial dual interface, and industrial –40°C to +85°C operation - used in portable test equipment and USB data acquisition modules.

For engineers reviewing the ADS8517IBPWR datasheet, ADS8517IBPWR pinout, ADS8517IBPWR application, or ADS8517IBPWR equivalent, this page delivers verified specifications, TSSOP-28 package mapping, real-world timing behavior (2.5 µs conversion time), and validated alternatives for precision data acquisition system design.

Technical Context

The ADS8517IBPWR implements a capacitor-based SAR architecture with internal sample-and-hold, clock generator, and reference buffer. It supports configurable input ranges via external resistor networks (e.g., ±10 V using R1IN→VIN and R2IN→CAP), and achieves ±1.5 LSB INL and 88.8 dB SINAD at 10 kHz with internal reference.

Dual output modes are hardware-selectable: parallel 16-bit data (BYTE-pin controlled MSB/LSB byte sequencing) or SPI-compatible serial output (SDATA/DATACLK with TAG daisy-chain support). The device operates from single 4.5–5.5 V analog and 1.65–5.5 V digital supplies, with power-down mode consuming ≤50 µW.

Key Specifications

Pinout & Package

TSSOP-28 package (PW suffix), 9.7 mm × 4.4 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8515IPWR and ADS8686IPWR, the ADS8517IBPWR uniquely balances 200-kSPS throughput, dual parallel/serial interface, and ±25-V fault tolerance in a drop-in TSSOP-28 package - making it optimal for portable test gear requiring both speed and robustness without PGA complexity.

Availability

ADS8517IBPWR is available at Aetrix Electronics and suitable for portable test equipment, USB data acquisition modules, and industrial process control systems requiring stable component supply and long-term production continuity.

Supply support for ADS8517IBPWR 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, embedded processing, and connectivity technologies with over 90 years of innovation in precision signal chain solutions.

The ADS8517 belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power data acquisition in portable instrumentation, medical devices, and industrial automation where accuracy, reliability, and ease of integration are critical.

FAQ

What is the maximum sampling rate supported by the ADS8517IBPWR?

The ADS8517IBPWR supports a maximum sampling rate of 200 kSPS, with a guaranteed conversion time of 2.5 µs and complete cycle time of 5 µs. This throughput enables accurate digitization of input signals up to 100 kHz under Nyquist criteria. The ADS8517IBPWR maintains its specified AC performance - including 88.8 dB SINAD at 10 kHz - only when operated at or below this rated rate.

Does the ADS8517IBPWR require an external reference voltage?

No, the ADS8517IBPWR includes a built-in 2.5-V reference with ±0.75% initial accuracy and ±0.6 ppm/°C bipolar zero drift, eliminating the need for an external reference in most applications. An external 2.3–2.7 V reference may be used via the REF pin if higher initial accuracy or custom reference voltage is required, but the ADS8517IBPWR must be configured accordingly using REFD and EXT/INT pins.

How does the BYTE pin affect data reading on the ADS8517IBPWR?

The BYTE pin on the ADS8517IBPWR selects between MSB-first and LSB-first parallel output: when BYTE = low, pins D0–D7 output the eight most significant bits; when BYTE = high, they output the eight least significant bits. This allows 8-bit microcontrollers to read the full 16-bit result in two consecutive cycles, with BUSY going high signaling valid data. The ADS8517IBPWR retains the full conversion result in its output register until overwritten by the next conversion.

What input voltage ranges does the ADS8517IBPWR support, and how are they configured?

The ADS8517IBPWR supports ±10 V, 0–5 V, and 0–4 V input ranges, configured by external resistor connections to R1IN and R2IN per Table 1 in the datasheet - e.g., ±10 V uses 200 Ω from R1IN to VIN and 100 Ω from R2IN to CAP. All ranges maintain high input impedance (≥20 kΩ) and survive ±25 V faults. The ADS8517IBPWR does not auto-detect range; configuration is fixed at circuit design time.

Is the ADS8517IBPWR pin-compatible with other Texas Instruments ADCs?

Yes, the ADS8517IBPWR is pin-compatible with the ADS7807, ADS8507 (16-bit), and ADS7806, ADS8506 (12-bit) in TSSOP-28 and SO-28 packages. This allows direct substitution in existing designs targeting higher resolution or improved specs - though users must verify timing, reference, and interface configuration compatibility, as the ADS8517IBPWR introduces new features like BYTE and SB/BTC control not present in earlier variants.