Texas Instruments ADS114S08IRHBT

Overview

ADS114S08IRHBT from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter with integrated PGA (gain 1–128), 12-channel analog multiplexer, dual programmable 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 and supports low-latency digital filtering for 50/60-Hz rejection in industrial sensor signal conditioning.

For engineers reviewing the ADS114S08IRHBT datasheet, ADS114S08IRHBT pinout, ADS114S08IRHBT application, or ADS114S08IRHBT equivalent, key selection criteria include its 12-input MUX configuration, rail-to-rail input capability with burnout detection, simultaneous 50/60-Hz rejection at ≤20 SPS, internal oscillator accuracy (±1.5%), and VQFN-32 package compatibility with thermal pad grounding.

Technical Context

The ADS114S08IRHBT implements a configurable sinc3 or low-latency digital filter optimized for industrial noise rejection, with selectable data rates from 2.5 SPS to 4 kSPS. Its PGA provides eight discrete gain settings (1, 2, 4, 8, 16, 32, 64, 128) and supports both unipolar (2.7–5.25 V) and bipolar (±2.5 V) analog supplies.

It integrates four GPIOs (GPIO0–GPIO3), sensor burnout detection, voltage bias generation (VBIAS), supply monitoring (AVDD/DVDD), and an on-chip temperature sensor (403 µV/°C coefficient). The device uses a 4.096-MHz internal oscillator or accepts external clock input, and supports system/self-calibration with offset and gain error correction.

Key Specifications

Pinout & Package

The ADS114S08IRHBT is housed in a 5.0 mm × 5.0 mm VQFN-32 package (RHB) with exposed thermal pad connected to AVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS124S08IPBSR, the ADS114S08IRHBT trades 8 bits of resolution for 75% lower power and smaller VQFN package; versus AD7124-8BCPZ, it adds 4 extra channels, burnout detection, and VBIAS-enabling full-featured transmitter design in one IC.

Availability

ADS114S08IRHBT is available at Aetrix Electronics and suitable for industrial temperature controllers, PLC analog input modules, and pressure transmitter designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS114S08IRHBT 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 and embedded processing technologies, with leadership in precision data converters and industrial-grade ICs.

The ADS114S0x product line targets high-integration, low-power sensor signal conditioning for industrial automation, process control, and smart transmitters-reducing system complexity through on-chip PGA, reference, IDACs, and diagnostics.

FAQ

What is the maximum data rate supported by the ADS114S08IRHBT?

The ADS114S08IRHBT supports data rates from 2.5 SPS up to 4 kSPS. At 4 kSPS, the device operates in fast mode with reduced noise performance and no 50/60-Hz rejection; for simultaneous mains-frequency rejection, use ≤20 SPS with sinc3 or low-latency filter configuration. The internal 4.096-MHz oscillator or external clock determines timing fidelity.

Does the ADS114S08IRHBT require external components for basic operation?

The ADS114S08IRHBT requires minimal external components: decoupling capacitors on AVDD (330 nF), DVDD and IOVDD (100 nF each), and REFOUT (1–47 µF). No external reference, crystal, or IDACs are needed-the internal 2.5-V reference, 4.096-MHz oscillator, and dual 10–2000 µA current sources are fully integrated. Unused pins must be tied per datasheet guidelines (e.g., NC to AVSS).

How does the burnout detection feature work on the ADS114S08IRHBT?

The ADS114S08IRHBT includes dedicated burnout current sources (0.2/1/10 µA) that can be enabled per channel to detect open-circuit sensors. When activated, the current source forces a known current through the sensor; the resulting voltage is compared against thresholds. If the voltage exceeds AVDD–0.15 V or falls below AVSS+0.15 V, the device flags a burnout condition via status register-enabling fail-safe behavior before conversion proceeds.

Can the ADS114S08IRHBT operate with bipolar analog supplies?

Yes, the ADS114S08IRHBT supports bipolar analog supplies: AVDD to AVSS can range from ±2.5 V (i.e., AVDD = +2.5 V, AVSS = –2.5 V). In this configuration, the internal reference remains 2.5 V (referenced to AVSS), and the PGA maintains rail-to-rail input capability. Digital supplies (DVDD, IOVDD) remain unipolar (2.7–3.6 V and 2.7–5.25 V respectively), referenced to DGND.

What package type and thermal characteristics apply to the ADS114S08IRHBT?

The ADS114S08IRHBT uses the RHB package: a 32-pin VQFN (5.0 mm × 5.0 mm) with exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 45.2°C/W. The thermal pad must be soldered to AVSS for optimal heat dissipation and EMI performance. This package supports reflow assembly and meets IPC/JEDEC J-STD-020 moisture sensitivity level 3.