Texas Instruments ADS114S08BIPBSR

Overview

ADS114S08BIPBSR 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 supply ranges of AVDD/AVSS = ±2.5 V or 2.7–5.25 V and DVDD/IOVDD = 2.7–3.6 V, targeting high-accuracy sensor signal conditioning in field transmitters and PLC modules.

For engineers reviewing the ADS114S08BIPBSR datasheet, ADS114S08BIPBSR pinout, ADS114S08BIPBSR application, or ADS114S08BIPBSR equivalent, this device delivers simultaneous 50/60-Hz rejection at ≤20 SPS, self/system calibration, burn-out detection, four GPIOs, and SPI-compatible serial interface - all in a TQFP-32 package suitable for industrial temperature sensing, RTD/thermocouple measurement, and precision analog input modules.

Technical Context

The ADS114S08BIPBSR implements a low-latency digital filter optimized for industrial noise rejection, supporting data rates from 2.5 SPS to 4 kSPS with configurable settling time. Its input multiplexer enables flexible routing of any of its 12 analog inputs (AIN0–AIN11) as differential or single-ended pairs to the PGA and ADC core.

Integrated excitation current sources support matched biasing of 2-/3-/4-wire RTDs, while the internal 2.5-V reference and optional external reference monitoring (REFP0/REFN0, REFP1/REFN1) enable robust ratiometric measurements. The device supports both internal oscillator and external clock (2–4.5 MHz), with power-down current as low as 0.1 µA.

Key Specifications

Pinout & Package

The ADS114S08BIPBSR is packaged in a 32-pin TQFP (PBS package), 5.0 mm × 5.0 mm body size, with exposed thermal pad connected to AVSS. Pin functions are defined per TI SBAS852A Rev. February 2020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS124S08IPBSR and AD7124-8BCPZ, the ADS114S08BIPBSR offers optimal balance of 16-bit precision, ultra-low power (280 µA), integrated oscillator, and sensor-specific features (burn-out detection, VBIAS, reference monitoring) - making it the most cost-effective and compact solution for industrial field transmitters and PLC analog input stages.

Availability

ADS114S08BIPBSR 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 ADS114S08BIPBSR 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-accuracy, low-power sensor measurement in harsh industrial environments - integrating PGA, reference, IDACs, and digital filtering to replace multi-component discrete signal chains.

FAQ

What is the maximum number of analog input channels supported by the ADS114S08BIPBSR?

The ADS114S08BIPBSR supports 12 independently selectable analog input channels (AIN0 through AIN11), including AIN6–AIN11 accessible via GPIO pins 19–22 and pins 31–32 when configured as analog inputs. This is confirmed in the Device Comparison Table and Pin Functions section of the SBAS852A datasheet.

Does the ADS114S08BIPBSR require an external crystal oscillator?

No, the ADS114S08BIPBSR includes an internal 4.096-MHz oscillator with ±2% accuracy, eliminating the need for an external crystal. An external clock (2–4.5 MHz) may be used via the CLK pin, but is optional - the internal oscillator is enabled by default at power-up.

How does the burn-out detection feature work on the ADS114S08BIPBSR?

The ADS114S08BIPBSR integrates dedicated burn-out current sources (0.2 µA, 1 µA, or 10 µA) that can be applied to sensor inputs to detect open-circuit faults. When enabled, the resulting voltage shift at AINx is measured by the ADC - a large deviation triggers a flag in the status register, enabling automatic fault reporting in RTD or thermistor applications.

Can the ADS114S08BIPBSR operate with bipolar analog supplies?

Yes, the ADS114S08BIPBSR supports bipolar analog supplies: AVDD to AVSS may be configured as ±2.5 V (e.g., AVDD = +2.5 V, AVSS = –2.5 V), enabling true bipolar input ranges without level-shifting circuitry. This is explicitly specified in Section 7.3 Recommended Operating Conditions under "Analog power supply".

What package type is used for the ADS114S08BIPBSR?

The ADS114S08BIPBSR uses the PBS package: a 32-pin TQFP with 5.0 mm × 5.0 mm body size and standard lead pitch. This is documented in the "Device Information" table and "Pin Configuration and Functions" section of the SBAS852A datasheet, and confirmed by the orderable part number suffix "IPBSR".