Texas Instruments ADS8588SIPMR

Overview

ADS8588SIPMR from Texas Instruments is a 16-bit, 8-channel simultaneous-sampling SAR ADC with integrated analog front-end, ±10 V/±5 V bipolar input support on single 5-V supply, 200 kSPS per channel throughput, and on-chip 2.5-V reference. It serves as the core data acquisition engine in high-accuracy power protection relays and multichannel industrial control systems.

For engineers reviewing the ADS8588SIPMR datasheet, ADS8588SIPMR pinout, ADS8588SIPMR application, or ADS8588SIPMR equivalent, key selection criteria include simultaneous sampling capability across eight channels, ±10 V true bipolar input range without external level-shifting, 96.4 dB SNR at 16× oversampling, and LQFP-64 package compatibility with industrial PCB layout constraints.

Technical Context

The ADS8588SIPMR implements eight independent analog input paths-each with 1 MΩ input impedance, overvoltage clamp (7-kV ESD), third-order Butterworth low-pass filter, and PGA-feeding into a shared 16-bit SAR conversion core. Its digital control logic supports three interface modes (parallel, serial, byte) via PAR/SER/BYTE SEL, OS0–OS2, and RD/SCLK pins.

Simultaneous sampling is enforced by dual CONVSTA/CONVSTB triggers controlling two groups of four channels, ensuring zero inter-channel latency. The internal reference buffer delivers 4.0 V to the ADC core (REFCAPA/REFCAPB), while REFSEL selects between internal 2.5-V reference output or external reference input on REFIN/REFOUT.

Key Specifications

Pinout & Package

ADS8588SIPMR is housed in a 64-pin LQFP package with 0.5-mm pitch and thermally enhanced construction. AGND pins (2, 26, 35, 40, 41, 47) and AVDD pins (1, 37, 38, 48) are distributed for optimal analog power integrity. The package includes dedicated REFCAPA/REFCAPB (pins 44/45) and REGCAP1/REGCAP2 (pins 36/39) decoupling terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel simultaneous-sampling ADC applications.

Compared with ADS8588SIPMR, ADS8688IPMR trades reference integration and precision for programmable gain flexibility, while AD7606C-18BSTZ delivers higher resolution and SNR at the expense of increased system-level design effort and non-interchangeable pin mapping.

Availability

ADS8588SIPMR is available at Aetrix Electronics and suitable for power grid protection relays, multiphase motor controls, and industrial data acquisition systems requiring stable component supply across extended temperature operation and long product lifecycles.

Supply support for ADS8588SIPMR 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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and high-performance data converters for industrial, automotive, and communications markets.

The ADS8588SIPMR belongs to TI's high-precision data acquisition portfolio, engineered specifically for simultaneous-sampling, high-voltage industrial sensing applications where channel-to-channel coherence, bipolar input capability, and ruggedized operation are mandatory.

FAQ

What is the maximum sample rate per channel for the ADS8588SIPMR?

The ADS8588SIPMR achieves a maximum throughput rate of 200 kSPS per channel across all eight channels simultaneously. This is validated under recommended operating conditions (AVDD = 4.75 V to 5.25 V, TA = –40°C to +125°C) with no latency penalty. The device maintains this rate whether using internal or external reference, and regardless of selected input range (±10 V or ±5 V). Each conversion completes in 5 µs, enabling real-time transient capture in protection relay algorithms.

Does the ADS8588SIPMR support true bipolar input ranges without external level-shifting circuitry?

Yes, the ADS8588SIPMR supports true bipolar ±10 V and ±5 V input ranges directly on a single 5-V analog supply. This is achieved through an integrated analog front-end that includes rail-to-rail input clamps, programmable gain amplifiers, and internal charge redistribution. When RANGE = 1, the device accepts ±10 V differential inputs referenced to AIN_nGND; when RANGE = 0, it accepts ±5 V. No external op-amps, level shifters, or dual supplies are required - reducing component count and board space in CT/PT interfacing.

How does the on-chip digital oversampling filter improve system performance in the ADS8588SIPMR?

The ADS8588SIPMR's configurable oversampling filter (OSR = 2 to 64×) improves effective resolution and noise floor without increasing host processing load. At OSR = 16×, SNR rises from 92.7 dB to 96.4 dB - adding ~0.6 effective bits - while maintaining 200-kSPS aggregate throughput. Oversampling is implemented digitally after conversion, so it does not affect acquisition time or latency. The filter output is delivered via the same DB[15:0] bus, allowing seamless integration with existing firmware that reads raw samples.

What are the power-down modes supported by the ADS8588SIPMR and their typical current consumption?

The ADS8588SIPMR supports two power-down modes controlled via the STBY pin. In standby mode (STBY = low), AVDD current drops to 4.2–5.5 mA and DVDD current to 0.05–1.5 µA - retaining register state and reference bias. In full shutdown mode (RANGE = low while STBY = low), AVDD current falls to 0.2–6 µA and DVDD current to 0.05–1.5 µA - disabling reference and internal regulators. Both modes retain pin configuration and allow wake-up via CONVSTA/CONVSTB or RESET, making them suitable for battery-powered condition monitoring nodes.

Can the ADS8588SIPMR be used with an external reference, and what are the interface requirements?

Yes, the ADS8588SIPMR supports external reference input via the REFIN/REFOUT pin when REFSEL = 0. It accepts a 2.475–2.525 V reference with 100-MΩ input impedance and 10-pF capacitance. The external reference must be decoupled to REFGND (pins 43/46) using a 10-µF ceramic capacitor. Using an external reference does not impact conversion speed or accuracy specifications - INL remains ±0.45 LSB and SNR stays ≥92.2 dB - but requires careful layout to avoid noise coupling into the high-impedance reference node.