Texas Instruments ADS1147EVM

Overview

ADS1147EVM from Texas Instruments is a stand-alone evaluation module designed for the ADS1147 - a 16-bit, multi-channel, delta-sigma analog-to-digital converter (ADC) - enabling full functional and performance validation including input multiplexing, reference selection, GPIO control, and SPI/I²C interface testing. It supports ±2.5V and +5V analog supply configurations, onboard 2.048V buffered reference, and direct connection to modular interface platforms such as the MMB3 motherboard.

For engineers reviewing the ADS1147EVM datasheet, ADS1147EVM pinout, ADS1147EVM application, or ADS1147EVM equivalent, this page delivers verified hardware interface details, jumper and switch configuration logic, analog/digital signal routing, power architecture, and ADCPro software integration requirements specific to the ADS1147EVM board - not the ADS1247EVM or PDK variants.

Technical Context

The ADS1147EVM implements a fixed-configuration analog front-end with dual-row Samtec headers (J4/J8) providing direct access to all eight ADS1147 analog inputs (AIN0–AIN3 differential pairs), REF+ and REF−, and AGND. It uses no on-board microcontroller and relies entirely on external host control via SPI or I²C protocols routed through J7 - a 20-pin header supporting CS, SCLK, DIN, DOUT/DRDY, START, MR, PWRSEL, and GPIO0–GPIO5 signals.

Digital and analog power domains are fully segregated: J3 accepts +5VA, –5VA (bipolar mode), +3.3VD, DGND, and AGND; J10 jumpers enable current measurement on AVDD, AVSS, and DVDD rails. Clocking defaults to the ADS1147's internal oscillator, though U8 footprint and J9 allow optional external crystal or processor-driven clock injection via TOUT (J7.17).

Key Specifications

Availability

ADS1147EVM is available at Aetrix Electronics and suitable for precision sensor interface validation, industrial data acquisition prototyping, and embedded ADC firmware development requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADS1147EVM 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, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.

The ADS1147EVM belongs to TI's precision data converter evaluation platform family, engineered specifically to accelerate design-in of delta-sigma ADCs in high-resolution sensor measurement systems - emphasizing low-noise analog routing, flexible reference architecture, and seamless PC-based characterization.

FAQ

What is the ADS1147EVM and how does it differ from the ADS1247EVM?

The ADS1147EVM is a dedicated evaluation module for the 16-bit ADS1147 delta-sigma ADC, sharing identical PCB layout, header pinouts, and firmware interface with the ADS1247EVM but configured exclusively for the ADS1147 device. While both boards use the same physical design and ADCPro plug-in, the ADS1147EVM targets lower-resolution, cost-sensitive applications where 16-bit resolution suffices - unlike the 24-bit ADS1247EVM intended for ultra-high-precision metrology.

Does the ADS1147EVM include an on-board microcontroller or run standalone firmware?

No, the ADS1147EVM contains no microcontroller and cannot operate autonomously. It is a passive evaluation board that requires external host control - either via a microcontroller/DSP interfacing directly to J7, or through the MMB3 motherboard and ADCPro software running on a Windows PC. All configuration, data capture, and register writes for the ADS1147 are performed externally.

Which software and drivers are required to operate the ADS1147EVM?

The ADS1147EVM requires ADCPro™ software (v1.x, Windows XP only), the ADS1147EVM-PDK plug-in, and the TUSB3410 Virtual COM port driver. Firmware must be loaded once to the MMB3 motherboard's MSP430F449 microcontroller using the BSL mode. No Linux or macOS support exists, and Windows Vista/7+ are explicitly unsupported per the official user guide.

Can the ADS1147EVM be used without the MMB3 motherboard or PDK kit?

Yes - the ADS1147EVM functions as a stand-alone PCB. Engineers can interface it directly to custom host systems via J3 (power), J4/J8 (analog), and J7 (digital). Required connections include +5VA/–5VA or +5VA only (depending on mode), +3.3VD, AGND/DGND, and SPI/I²C signals. Jumper J2 and switch S1 must be manually configured per desired clock and reference mode.

What are the key analog interface limitations and protections on the ADS1147EVM?

The ADS1147EVM provides no overvoltage, ESD, or surge protection on J4/J8 analog pins - all AINx, REF+, REF−, and AGND connections are routed directly to the ADS1147 with only 47Ω series resistors and 47pF shunt capacitors per channel. Users must ensure input signals remain within ADS1147 absolute maximum ratings (e.g., AINx ≤ AVDD + 0.3V, ≥ AVSS – 0.3V) and avoid floating or unshielded high-impedance sources.