Texas Instruments ADS8507IDWRG4

Overview

ADS8507IDWRG4 from Texas Instruments is a 16-bit, 40-kSPS successive approximation register (SAR) analog-to-digital converter with integrated 2.5-V reference, parallel/serial interface, ±10-V input range support, and SO-28 package. It delivers 89.9-dB SINAD at 10 kHz, ±1.5 LSB max INL, and operates from a single 5-V supply in industrial temperature range (–40°C to +85°C). It serves as the core data acquisition front-end in precision process control systems.

For engineers reviewing the ADS8507IDWRG4 datasheet, ADS8507IDWRG4 pinout, ADS8507IDWRG4 application, or ADS8507IDWRG4 equivalent, key selection criteria include its dual-interface flexibility (parallel BYTE-select + SPI-compatible serial), bipolar/unipolar input range configurability, internal reference accuracy (±0.2% FSR, 8 ppm/°C drift), and low-power operation (24 mW typ at 40 kSPS).

Technical Context

The ADS8507IDWRG4 implements a capacitor-based SAR architecture with integrated sample-and-hold, clock generator, and reference buffer. Its dual-mode digital interface supports either full 16-bit parallel output (via D0–D7 and BYTE control) or daisy-chainable serial output (SDATA/DATACLK with TAG), both configurable for straight binary or 2's complement coding via SB/BTC pin.

Input range selection (±10 V, 0–4 V, 0–5 V) is achieved through external resistor networks per Figure 42/43, while internal trimming enables single-supply offset/gain calibration. The device tolerates ±25 V on R1IN/R2IN without damage and features 20 ns aperture jitter and 5 µs transient response for high-fidelity signal capture.

Key Specifications

Pinout & Package

ADS8507IDWRG4 is housed in a 28-pin SOIC (SO-28) package with standard 0.600-inch body width and 1.27-mm lead pitch. Pin functions are validated per TI SLAS381 datasheet Section "Terminal Functions".

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8505IPW and ADS8686SIPWR, the ADS8507IDWRG4 uniquely balances integrated reference, ±10-V input capability, dual parallel/serial interface, and industrial-grade reliability in a mature SO-28 package-making it optimal for cost-sensitive, space-constrained, and field-hardened DAQ designs where 40-kSPS suffices.

Availability

ADS8507IDWRG4 is available at Aetrix Electronics and suitable for industrial process control, test equipment, medical data acquisition, and embedded data loggers requiring stable component supply and long-term lifecycle support.

Supply support for ADS8507IDWRG4 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 ICs.

The ADS8507IDWRG4 belongs to TI's precision SAR ADC product line, designed specifically for high-accuracy, low-power, and robust industrial data acquisition where reliability, ease of use, and integrated functionality are prioritized over ultra-high speed.

FAQ

What input voltage ranges does the ADS8507IDWRG4 support?

The ADS8507IDWRG4 supports three configurable input ranges: ±10 V, 0–4 V, and 0–5 V. Range selection is implemented using external resistors per TI's Figure 42 and Figure 43. The analog inputs (R1IN and R2IN) tolerate ±25 V continuously without damage, making ADS8507IDWRG4 suitable for harsh industrial environments with potential overvoltage events.

Does the ADS8507IDWRG4 require an external reference voltage?

No-the ADS8507IDWRG4 includes an internal 2.5-V reference with ±0.2% initial accuracy and 8 ppm/°C drift over –40°C to +85°C. It can also accept an external 2.3–2.7-V reference via the REF pin when higher precision or custom reference voltage is needed. The internal reference is enabled by default; REFD must be held low to activate it.

How does the parallel interface of the ADS8507IDWRG4 operate?

The ADS8507IDWRG4 parallel interface outputs 16-bit data across two 8-bit nibbles using D0–D7 pins. The BYTE pin selects whether the MSB (BYTE = low) or LSB (BYTE = high) appears on those pins. BUSY going high signals valid data; CS and R/C control read/convert timing. This allows microcontrollers or FPGAs to read full 16-bit results without bit-shifting overhead.

Can the ADS8507IDWRG4 be used in daisy-chain configurations?

Yes-the ADS8507IDWRG4 supports daisy-chained serial output using the TAG pin and SDATA/DATACLK interface. When EXT/INT is high, the device outputs TAG state after each 16-bit transfer, enabling synchronization across multiple ADS8507IDWRG4 devices on a shared serial bus-ideal for multi-channel synchronized acquisition without additional control lines.

What is the power consumption of the ADS8507IDWRG4 during active conversion?

At 40 kSPS with VANA = VDIG = 5 V, the ADS8507IDWRG4 consumes 24 mW typical (30 mW maximum). In power-down mode (PWRD = high), consumption drops to 50 µW maximum. This low active and standby power enables use in thermally constrained enclosures and battery-powered remote sensors where thermal management and energy efficiency are critical design constraints for ADS8507IDWRG4 deployments.