Texas Instruments ADS114S08BIRHBR

Overview

ADS114S08BIRHBR 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 (8 ppm/°C drift), and 4.096-MHz oscillator. It operates from –40°C to +125°C with 2.7–5.25 V analog supply and supports simultaneous 50/60-Hz rejection at ≤20 SPS - ideal for high-accuracy industrial sensor signal conditioning in field transmitters.

For engineers reviewing the ADS114S08BIRHBR datasheet, ADS114S08BIRHBR pinout, ADS114S08BIRHBR application, or ADS114S08BIRHBR equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready procurement details - all grounded in TI's SBAS852A production datasheet and RHB package specifications.

Technical Context

The ADS114S08BIRHBR implements a low-latency digital filter optimized for industrial noise rejection, enabling simultaneous 50-Hz and 60-Hz line-cycle rejection at data rates ≤20 SPS without post-processing. Its input multiplexer supports 12 independently selectable analog inputs (AIN0–AIN11), with AIN6–AIN11 available only on pins 19–22, 31–32 in the VQFN-32 package.

It integrates two matched excitation current sources (IDACs) with 0.2% mismatch and 10 ppm/°C matching drift, plus burn-out detection (0.2–10 µA), voltage bias (VBIAS = (AVDD + AVSS)/2), and four GPIOs referenced to AVDD. The device supports both internal reference (2.5 V) and dual buffered external reference inputs (REFP0/REFN0, REFP1/REFN1), with reference monitoring circuitry detecting low-reference conditions.

Key Specifications

Pinout & Package

VQFN-32 (RHB) package: 5.0 mm × 5.0 mm, leadless, thermal pad connected to AVSS. Pin count and function mapping are identical to TQFP-32 (PBS), but RHB offers superior thermal performance (R_θJA = 45.2°C/W vs. 75.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS114S06BIRHBR, the ADS114S08BIRHBR adds six analog inputs and corresponding GPIO mappings - enabling multi-sensor systems without daisy-chaining. Versus AD7124-4BCPZ-RL7, it trades resolution for integrated diagnostics (burn-out, CJC, self-calibration) and lower system-level BOM cost in industrial field equipment.

Availability

ADS114S08BIRHBR is available at Aetrix Electronics and suitable for field transmitters, PLC analog input modules, and temperature controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ADS114S08BIRHBR 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 acquisition and industrial signal chain solutions.

The ADS114S0xB family was designed specifically for high-integration, low-power industrial sensing - targeting field transmitters, distributed control systems, and condition-monitoring equipment where reliability, diagnostic capability, and supply-chain resilience are critical.

FAQ

What is the maximum number of analog input channels supported by the ADS114S08BIRHBR?

The ADS114S08BIRHBR supports 12 analog input channels (AIN0 through AIN11), with AIN6–AIN11 mapped to pins 32, 31, 22, 21, 20, and 19 respectively. This 12-channel capability is exclusive to the ADS114S08B variant - the ADS114S06B supports only six inputs. All channels are independently selectable via the internal multiplexer, enabling flexible sensor routing without external hardware switches.

Does the ADS114S08BIRHBR require an external crystal or clock source?

No, the ADS114S08BIRHBR includes a fully integrated 4.096-MHz oscillator with ±2% accuracy, eliminating the need for external timing components. The CLK pin (pin 17) can be tied to DGND to enable the internal oscillator. An external clock (2–4.5 MHz) is optional and only required when tighter frequency tolerance or synchronization across multiple devices is needed - the internal oscillator suffices for most industrial measurement applications.

How does the burn-out detection feature work on the ADS114S08BIRHBR?

The ADS114S08BIRHBR provides three programmable burn-out current sources (0.2 µA, 1 µA, or 10 µA) that can be applied to analog inputs to detect open-circuit conditions in thermocouples or RTDs. When enabled, the current flows through the sensor; if no return path exists (e.g., broken wire), the resulting voltage shift at the input exceeds threshold limits and triggers a diagnostic flag in the status register - allowing the host system to log faults before process interruption occurs.

Can the ADS114S08BIRHBR operate with a bipolar analog supply?

Yes, the ADS114S08BIRHBR supports bipolar analog supplies: AVDD to AVSS may range from ±2.5 V (i.e., AVDD = +2.5 V, AVSS = –2.5 V), enabling direct interface to legacy industrial sensors with negative output ranges. The device maintains full 16-bit performance and specified INL, noise, and CMRR across this range. Digital supplies (DVDD, IOVDD) remain unipolar (2.7–3.6 V and 2.7–5.25 V respectively) and are independent of the analog rail configuration.

What is the role of the VBIAS pin on the ADS114S08BIRHBR?

The VBIAS pin (pin 29) outputs a buffered voltage equal to (AVDD + AVSS)/2, providing a stable mid-supply bias point for thermocouple or other differential sensor configurations requiring level-shifting. It delivers up to 1 mA with 350-Ω output impedance and settles within 2.8 ms (0.1% to 1-µF load). This eliminates the need for external resistive dividers or op-amp buffers in designs where sensor common-mode voltage must be centered for optimal PGA input range utilization.