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ADS1247IPWR

TIADS1247IPWR

Texas Instruments
24 Bit Analog to Digital Converter 2, 3 Input 1 Sigma-Delta 20-TSSOP
NRND7,187 in stock
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Overview

The ADS1247IPWR is a high-precision 24-bit delta-sigma analog-to-digital converter designed for high-resolution measurement of small sensor signals. It integrates a low-noise programmable gain amplifier (PGA), dual programmable excitation current sources, and an internal 2.048V reference to minimize external component count.

Why Choose This Part

This ADC provides a complete front-end solution with a built-in MUX, PGA, and sensor burnout detection, reducing PCB footprint in dense industrial designs. Its flexible excitation currents and high input impedance allow for direct connection to high-precision sensors without external buffering.

Applications

RTD Temperature Measurement
Utilizes the dual-matched excitation current sources for 3-wire and 4-wire RTD sensors with lead-wire compensation.
Thermocouple Measurement
Leverages the integrated low-noise PGA and internal temperature sensor for cold-junction compensation.
Bridge Sensor Interface
Ideal for weight scales and strain gauges requiring 24-bit resolution and differential inputs.
Industrial Process Control
Monitors 4-20mA loops and factory automation sensors with low power consumption of 225uA.

Key Specifications

Features PGA, Temperature Sensor
Input Type Differential, Single Ended
Architecture Sigma-Delta
Configuration MUX-PGA-ADC
Mounting Type Surface Mount
Data Interface SPI
Number of Bits 24
Package / Case 20-TSSOP (0.173", 4.40mm Width)
Reference Type External, Internal
Number of Inputs 2, 3
Operating Temperature -40degC ~ 105degC
Supplier Device Package 20-TSSOP
Number of A/D Converters 1
Voltage - Supply, Analog 2.7V ~ 5.25V
Voltage - Supply, Digital 2.7V ~ 5.25V
Sampling Rate (Per Second) 2k

Getting Started

Designers can evaluate performance using the ADS1247EVM evaluation module. Firmware development requires a standard 4-wire SPI interface to configure the internal registers and handle data ready (DRDY) interrupts for efficient conversion retrieval.

Also Consider

ADS1220IPWR TITexas Instruments - A smaller 16-pin TSSOP alternative for space-constrained applications that still require integrated excitation currents.