Texas Instruments ADS124S06IRHBR

Overview

ADS124S06IRHBR from Texas Instruments is a 24-bit, delta-sigma analog-to-digital converter with integrated programmable gain amplifier (PGA), 6-channel analog multiplexer, dual matched excitation current sources (10–2000 µA), internal 2.5-V reference (10 ppm/°C max drift), and SPI interface. It operates from –50°C to +125°C with 280 µA typical supply current and supports 2.5–4000 SPS data rates for high-precision sensor signal acquisition in harsh industrial environments.

For engineers reviewing the ADS124S06IRHBR datasheet, ADS124S06IRHBR pinout, ADS124S06IRHBR application, or ADS124S06IRHBR equivalent, key selection considerations include its 6-input channel count (vs. 12 on ADS124S08), VQFN-32 package, low-noise PGA (19 nVRMS at G=128), simultaneous 50/60-Hz rejection ≤20 SPS, and integrated burn-out detection for RTD and thermocouple systems.

Technical Context

The ADS124S06IRHBR implements a configurable sinc3 or low-latency digital filter optimized for industrial noise rejection, with simultaneous 50-Hz and 60-Hz line-cycle rejection achievable at ≤20 SPS. Its PGA supports gains of 1–128 and features rail detection, while the dual IDACs enable precise 3-/4-wire RTD biasing with <0.4% accuracy at 1–2 mA.

It integrates an internal 4.096-MHz oscillator (±1.5% accuracy), temperature sensor, four GPIOs, and extended fault detection including reference, supply, and PGA rail monitoring. The device supports unipolar (2.7–5.25 V) or bipolar (±2.5 V) analog supplies and 2.7–3.6 V digital I/O, enabling direct interfacing with microcontrollers and isolated power domains.

Key Specifications

Pinout & Package

VQFN-32 (RHB) package: 5.0 mm × 5.0 mm, leadless, thermal pad connected to AVSS. Pin 1 marked by top-side dot; thermal pad must be soldered for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision delta-sigma ADC applications.

Compared with ADS124S08IRHBR, ADS124S06IRHBR reduces pin count and routing complexity for 6-input systems while maintaining identical noise, drift, and diagnostic performance. Against ADS1220IPWR, it adds critical industrial features - burn-out detection, internal oscillator, and enhanced 50/60-Hz rejection - at modest power and size cost.

Availability

ADS124S06IRHBR is available at Aetrix Electronics and suitable for industrial temperature sensing, PLC analog input modules, pressure transmitter front-ends, and strain gauge signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ADS124S06IRHBR 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 ADS124S0x family was designed specifically for high-accuracy, low-power industrial sensor signal acquisition - integrating PGA, reference, IDACs, and diagnostics to replace multi-component front-ends in transmitters, PLCs, and process controllers.

FAQ

What is the maximum data rate supported by the ADS124S06IRHBR?

The ADS124S06IRHBR supports data rates from 2.5 SPS up to 4 kSPS. At the highest rate (4000 SPS), effective resolution drops to ~18 bits due to increased noise; for full 24-bit performance with no missing codes, use ≤200 SPS. The device includes both sinc3 and low-latency digital filters to optimize speed versus noise trade-offs.

Does the ADS124S06IRHBR require an external crystal or oscillator?

No, the ADS124S06IRHBR includes an internal 4.096-MHz oscillator with ±1.5% accuracy, eliminating the need for external timing components in most applications. An external clock (2–4.5 MHz) may be applied to CLK pin for improved timing precision or synchronization across multiple devices, but is optional.

How many analog input channels does the ADS124S06IRHBR support?

The ADS124S06IRHBR supports six independently selectable analog input channels (AIN0–AIN5), plus AINCOM as common reference. Unlike the ADS124S08IRHBR, it does not support AIN6–AIN11; pins 31 and 32 (REFN1/AIN7 and REFP1/AIN6) are unused analog inputs on the ADS124S06IRHBR and must be left unconnected or tied to AVSS.

What is the purpose of the AVSS-SW pin on the ADS124S06IRHBR?

The AVSS-SW pin is a switched analog ground connection used primarily in isolated or floating sensor configurations. In standard operation, it is connected directly to AVSS. When used with external low-side switches or isolated current sources, AVSS-SW provides a dedicated return path that avoids injecting switching noise into the main AVSS plane, preserving ADC accuracy.

Can the ADS124S06IRHBR perform self-calibration, and how is it initiated?

Yes, the ADS124S06IRHBR supports both self-offset and system-gain calibration. Self-calibration is initiated by writing to the appropriate register (e.g., setting CAL_SYS_OFFSET bit in the SYS_CTRL register). The process takes <10 ms and adjusts internal DACs to null offset error; results are stored in on-chip registers and applied automatically to subsequent conversions.