Texas Instruments ADS131B26Q1EVM-PDK

Overview

ADS131B26Q1EVM-PDK from Texas Instruments is an evaluation module designed to fully assess the ADS131B26-Q1 automotive-grade analog front-end (AFE) for battery management systems. It integrates dual 24-bit simultaneous-sampling ADC pairs for redundant current and voltage measurement, supports USB-powered operation, includes onboard 8.192-MHz crystal oscillator, and provides terminal blocks for voltage/current/temperature sensor interface - all targeting EV battery pack monitoring applications.

For engineers reviewing the ADS131B26Q1EVM-PDK datasheet, ADS131B26Q1EVM-PDK pinout, ADS131B26Q1EVM-PDK application, or ADS131B26Q1EVM-PDK equivalent, this page delivers verified hardware configuration details, digital interface mapping (SPI/I²C), power architecture (isolated DC/DC with SN6505B-Q1), GUI software integration, and jumper-controlled ADC supply options - critical for BMS validation and production readiness assessment.

Technical Context

The ADS131B26Q1EVM-PDK implements galvanic isolation between host PC and ADS131B26-Q1 using ISO7762-Q1 and ISO7761-Q1 digital isolators, with power delivered across the barrier via SN6505B-Q1 transformer driver and discrete rectification. Its analog interface routes six differential/unipolar inputs per ADC pair through screw-terminal blocks (J1–J5) and test points, supporting ±10 V, 0–10 V, and 0–12.5 mA ranges with programmable gain settings.

Digital control is executed over SPI (ISO_SDI/SDO/SCLK/CSn/DRDYn) and I²C (EVM_ID_SDA/SCL), managed by a precision host interface (PHI) controller board that translates USB commands into timing-synchronized transactions. Clocking flexibility includes internal 8.192-MHz oscillator, external SMA input, or synchronized DC/DC switching via 16× clock division to align noise nulls with sinc3 filter notches.

Key Specifications

Availability

ADS131B26Q1EVM-PDK is available at Aetrix Electronics and suitable for automotive BMS development, EV battery stack validation, and high-precision ADC characterization requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for ADS131B26Q1EVM-PDK 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, embedded processing, and power management technologies, with leadership in automotive, industrial, and communications markets.

The ADS131B26Q1EVM-PDK belongs to TI's automotive AFE evaluation platform family, engineered specifically to accelerate qualification and validation of battery monitoring ICs in ASIL-D–capable EV battery management systems.

FAQ

What is the primary function of the ADS131B26Q1EVM-PDK?

The ADS131B26Q1EVM-PDK is an evaluation module for the ADS131B26-Q1 analog front-end IC, enabling full functional and performance validation of its dual 24-bit simultaneous-sampling ADC channels in automotive battery management applications. It provides complete analog signal conditioning, isolated digital communication, and GUI-driven configuration - all integrated on a single PCB with terminal block interfacing for real-world sensor connections.

Does the ADS131B26Q1EVM-PDK require an external power supply?

No - the ADS131B26Q1EVM-PDK is USB-powered via the included PHI controller board, eliminating need for external power supplies. The PHI board delivers regulated 3.3 V (ISO_3V3) to drive digital isolators, the onboard 8.192-MHz oscillator, and the SN6505B-Q1 transformer driver, which generates isolated analog and digital supplies (APWR/DPWR) for the ADS131B26-Q1.

How is isolation implemented on the ADS131B26Q1EVM-PDK?

Isolation on the ADS131B26Q1EVM-PDK is achieved using ISO7762-Q1 and ISO7761-Q1 digital isolators for SPI and I²C signals, plus galvanic power isolation via the SN6505B-Q1 transformer driver and discrete rectifier diodes (D1/D2). This architecture separates host-side logic (PHI controller) from the high-precision ADC side, meeting automotive safety requirements for fault containment and noise immunity in BMS environments.

What clocking options does the ADS131B26Q1EVM-PDK support for the ADS131B26-Q1?

The ADS131B26Q1EVM-PDK supports three clock sources for the ADS131B26-Q1: internal oscillator (8.192 MHz default), onboard Y1 crystal (8.192 MHz), or external clock via SMA connector (J10). When using external clocking, the signal is divided by 16 and fed to SN6505B-Q1 to synchronize DC/DC switching with ADC sinc3 filter nulls - reducing conducted noise impact on measurement accuracy.

Can the ADS131B26Q1EVM-PDK be used without the PHI controller board?

No - the ADS131B26Q1EVM-PDK requires the PHI controller board for operation. The PHI board provides USB-to-SPI/I²C translation, isolated power delivery (ISO_3V3), clock synchronization (ISO_CAPCLK), and GPIO signaling (ISO_GPIO0–ISO_GPIO4). All digital communication, reset control (ISO_RESETn), and data-ready signaling (ISO_DRDYn) are routed exclusively through the 60-pin J9 connector to the PHI controller.