Texas Instruments ADS114S08IPBSR

Overview

ADS114S08IPBSR from Texas Instruments is a 16-bit, delta-sigma analog-to-digital converter (ADC) with integrated programmable gain amplifier (PGA), 12-channel analog multiplexer, dual matched excitation current sources (10–2000 µA), internal 2.5-V reference (10 ppm/°C max drift), and 4.096-MHz oscillator. It delivers simultaneous 50/60-Hz rejection at ≤20 SPS and operates from –50°C to +125°C for industrial sensor signal conditioning.

For engineers reviewing the ADS114S08IPBSR datasheet, ADS114S08IPBSR pinout, ADS114S08IPBSR application, or ADS114S08IPBSR equivalent, this page provides verified technical context, real-world design meanings of key specs, validated pin functions for TQFP-32, confirmed alternatives for RTD/thermocouple measurement systems, and supply-chain support for long-lifecycle industrial deployments.

Technical Context

The ADS114S08IPBSR implements a low-latency sinc3 digital filter and configurable low-noise PGA (gain 1–128) optimized for resistive bridge and thermocouple inputs. Its analog front-end includes rail detection, burnout current sources (0.2–10 µA), and VBIAS generation for thermocouple cold-junction biasing.

It integrates four GPIOs (logic levels referenced to AVDD), dual IDACs with <0.1% mismatch at 1 mA, and fault detection circuits for reference, supply, and PGA rail monitoring. The SPI-compatible interface supports optional CRC and operates with DVDD = 2.7–3.6 V and AVDD = 2.7–5.25 V (unipolar or ±2.5 V bipolar).

Key Specifications

Pinout & Package

The ADS114S08IPBSR is housed in a 32-pin TQFP package (5.0 mm × 5.0 mm) with exposed thermal pad connected to AVSS. Pin functions are validated per TI SBAS815A Rev A (June 2017).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS114S06IPBSR and ADS124S08IPBSR, the ADS114S08IPBSR uniquely balances 12-channel flexibility, ultra-low power (280 µA), and integrated fault detection - making it optimal for compact, high-channel-count industrial transmitters where 16-bit accuracy suffices.

Availability

ADS114S08IPBSR is available at Aetrix Electronics and suitable for temperature transmitters, PLC analog input modules, and climate chamber controllers requiring stable component supply across extended industrial temperature ranges and multi-year production cycles.

Supply support for ADS114S08IPBSR 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 ADS114S0x family was designed specifically for high-integration, low-power industrial sensor measurement - targeting applications where minimizing external components, extending temperature range, and ensuring long-term calibration stability are critical.

FAQ

What is the maximum analog input voltage range supported by the ADS114S08IPBSR?

The ADS114S08IPBSR supports unipolar analog supplies from 2.7 V to 5.25 V (AVDD to AVSS) or bipolar ±2.5 V operation. Absolute input voltage on any AINx pin is limited to AVSS – 0.05 V to AVDD + 0.05 V. With PGA enabled at gain=128, the usable differential input range is ±VREF/128 = ±19.5 mV - sufficient for thermocouple outputs and low-level bridge signals. The device includes rail detection to flag out-of-range conditions.

Does the ADS114S08IPBSR support simultaneous sampling of multiple channels?

No, the ADS114S08IPBSR does not support true simultaneous sampling. It uses a single delta-sigma modulator with a 12-channel analog multiplexer, performing sequential conversions. However, its fast settling time (<190 µs PGA startup) and configurable digital filters enable effective pseudo-simultaneous acquisition across channels at up to 4 kSPS aggregate rate - adequate for most industrial control loops where inter-channel skew <100 µs is acceptable.

How does the internal 2.5-V reference perform under varying load conditions?

The ADS114S08IPBSR's internal 2.5-V reference delivers ±0.1% accuracy (VQFN package) and ≤10 ppm/°C drift from –50°C to +125°C. It can source/sink ±10 mA (AVDD ≥3.3 V) with 8 µV/mA load regulation. For optimal stability, TI specifies a 1–47 µF capacitor on REFOUT to REFCOM; noise is 9 µVPP (0.1–10 Hz) with 1 µF capacitor. External loading beyond ±5 mA degrades PSRR and increases drift.

Can the ADS114S08IPBSR's GPIO pins drive external loads directly?

Yes, the four GPIO pins (GPIO0–GPIO3) on the ADS114S08IPBSR operate at AVDD-referenced logic levels and can sink/source ≥1 mA (VOH ≥0.8 AVDD, VOL ≤0.2 AVDD). They are rated for absolute voltages from AVSS – 0.05 V to AVDD + 0.05 V. These pins support general-purpose control of LEDs, relays (via transistor buffer), or status indicators - but are not intended for high-speed or high-current switching.

What fault detection features are implemented in the ADS114S08IPBSR?

The ADS114S08IPBSR includes dedicated hardware fault detection for PGA rail saturation (±0.15 V from AVDD/AVSS), reference voltage presence (thresholds at 0.3 V and 1/3·(AVDD–AVSS)), supply monitors (AVDD/4 and DVDD/4), and burnout current sources (0.2/1/10 µA). All flags are readable via status register and can trigger DRDY assertion or interrupt - enabling autonomous system health monitoring without host polling.