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Texas Instruments ADS114S08IPBS
- Part No.:
- ADS114S08IPBS
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS114S08IPBS.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,825
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Product details
Overview
ADS114S08IPBS 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 4.096-MHz oscillator. It targets precision sensor signal conditioning in industrial temperature, pressure, and RTD measurement systems.
For engineers reviewing the ADS114S08IPBS datasheet, ADS114S08IPBS pinout, ADS114S08IPBS application, or ADS114S08IPBS equivalent, key selection criteria include its 12-input MUX configuration, simultaneous 50/60-Hz rejection at ≤20 SPS, rail-to-rail analog supply (2.7–5.25 V), –50°C to +125°C operating range, and SPI interface with optional CRC.
Technical Context
The ADS114S08IPBS implements a low-latency digital filter supporting sinc3 and low-latency modes for real-time industrial monitoring, with configurable data rates from 2.5 SPS to 4 kSPS. Its PGA features 8 gain settings and startup time of 190 µs, enabling rapid settling for dynamic sensor inputs.
Integrated fault detection includes burnout current sources (0.2–10 µA), PGA rail detection (±0.15 V from rails), reference voltage monitoring (three thresholds), and supply monitors (±1% accuracy). Four GPIOs support system-level control and status signaling using AVDD-referenced logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - ensures full-scale monotonicity for high-accuracy sensor digitization. |
| Data Rate | 2.5 to 4000 SPS - supports both ultra-low-power battery operation and high-throughput PLC sampling. |
| PGA Gain Range | 1 to 128 - enables direct interface with mV-level thermocouples and Ω-level RTDs without external amplification. |
| Reference Accuracy | ±0.1% (VQFN), 10 ppm/°C max drift - eliminates need for external precision reference in most industrial applications. |
| Power Consumption | 280 µA typical (conversion mode, internal reference enabled) - extends battery life in portable instrumentation. |
| Input Channels | 12 independently selectable analog inputs - supports multi-sensor arrays (e.g., 6-wire RTD + thermocouple + auxiliary sensors). |
| Operating Temperature | –50°C to +125°C - qualified for harsh environments including climate chambers and industrial ovens. |
Pinout & Package
The ADS114S08IPBS is housed in a 32-pin TQFP package (PBS variant) with 5.0 mm × 5.0 mm body size and exposed thermal pad connected to AVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AINCOM | Analog input common | Reference node for single-ended measurements; required for ratiometric sensor configurations. |
| 9 CS | Digital input | Active-low chip select for SPI communication; enables multi-device bus sharing. |
| 10 DIN | Digital input | SPI serial data input; accepts register writes and command sequences. |
| 11 SCLK | Digital input | SPI clock input; timing reference for synchronous data transfer. |
| 12 DOUT/DRDY | Digital output | Combined serial data output and active-low data-ready flag; reduces pin count vs. separate signals. |
| 13 DRDY | Digital output | Dedicated active-low conversion-complete indicator; supports interrupt-driven firmware design. |
| 19–22 GPIO3/AIN11 to GPIO0/AIN8 | Analog I/O | Configurable as general-purpose I/Os or additional analog inputs (ADS114S08 only); enables flexible system expansion. |
| 23 REFOUT | Analog output | 2.5-V reference output; requires 1–47 µF capacitor to REFCOM for stability and noise reduction. |
| 26 AVDD / 27 AVSS | Analog supply | Unipolar (2.7–5.25 V) or bipolar (±2.5 V) analog power domain; decoupling with ≥330 nF capacitor required. |
| 31 REFN1/AIN7, 32 REFP1/AIN6 | Analog input | Second differential reference pair or additional analog inputs - supports dual-reference or extended channel count. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 50/60-Hz rejection | ≥88 dB NMRR at 10 SPS with sinc3 filter - suppresses mains interference without software post-processing. |
| Dual matched IDACs | 10–2000 µA with ≤0.1% mismatch (1 mA–2 mA) - enables precise 2-/3-/4-wire RTD biasing and Kelvin sensing. |
| Internal temperature sensor | 129 mV at 25°C, 403 µV/°C coefficient - provides on-chip die temperature monitoring for calibration compensation. |
| Burnout detection | Three selectable currents (0.2/1/10 µA) with ±2% accuracy - identifies open-circuit RTDs or broken thermocouple wires. |
| Self and system calibration | On-chip offset/gain calibration with <1 µs latency - eliminates manual calibration steps and improves long-term stability. |
| Low-side power switch | RON = 1–3 Ω, 75 mA rating - allows controlled power gating of external sensor bridges or transducers. |
Applications
| Temperature Monitoring System | PLC Analog Input Module |
|---|---|
|
Use Scenario: Continuous monitoring of multiple RTDs and thermocouples in an industrial oven with ambient temperature ranging from –40°C to +125°C. IC Role / Device Role / Timing Role: Primary ADC performing synchronized 12-channel acquisition, PGA gain scaling, and 50/60-Hz noise rejection before sending data via SPI to host MCU. Use Value: Eliminates external reference, PGA, and excitation sources - reducing BOM cost by ~35% and PCB area by 40% versus discrete solutions. |
Use Scenario: High-density analog input card in a modular PLC handling 8–16 channels of pressure, strain, and flow sensor signals. IC Role / Device Role / Timing Role: Channel-multiplexed delta-sigma ADC with self-calibration and fault detection, interfacing to FPGA-based data aggregation logic. Use Value: Enables simultaneous 50/60-Hz rejection across all channels at 20 SPS - meeting IEC 61000-4-7 harmonic immunity requirements without oversampling. |
| Climate Chamber Controller | Smart Pressure Transmitter |
|
Use Scenario: Closed-loop environmental chamber requiring sub-0.1°C temperature stability and humidity compensation via capacitive sensor. IC Role / Device Role / Timing Role: Dual-role device: digitizes PT1000 RTD for temperature control loop and reads auxiliary analog outputs from humidity IC. Use Value: Internal VBIAS generator (AVDD/2 or AVDD/12) biases capacitive humidity sensors directly - removing external bias circuitry. |
Use Scenario: Field-mounted HART-enabled pressure transmitter with integrated diagnostics and 4–20 mA loop power. IC Role / Device Role / Timing Role: Signal conditioner converting millivolt bridge output to digital, performing linearization, and enabling burnout detection for predictive maintenance. Use Value: Burnout current sources and rail detection identify sensor failures before loop disruption - improving system uptime and reducing service calls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPBS | 24-bit resolution, same 12-channel MUX and IDAC architecture, but higher power (1.2 mA typ) and no internal oscillator. | Required where >16-bit ENOB is needed for ultra-high-precision weigh scales or laboratory instruments. | Select ADS124S08IPBS only when 24-bit resolution justifies 4× higher current draw and external clock dependency. |
| AD7124-8BCPZ | 8-channel (not 12), integrated PGA (1–128), 2.5-V ref (5 ppm/°C), but no burnout detection or VBIAS generator. | Suitable for compact 8-sensor nodes where GPIO count and diagnostic features are secondary to footprint and cost. | Choose AD7124-8BCPZ for space-constrained designs needing proven metrology-grade performance without extended diagnostics. |
Compared with ADS124S08IPBS and AD7124-8BCPZ, the ADS114S08IPBS uniquely balances 16-bit precision, 12-channel flexibility, integrated diagnostics, and ultra-low power - making it optimal for cost-sensitive, high-channel-count industrial sensor nodes requiring robust fault coverage.
Availability
ADS114S08IPBS is available at Aetrix Electronics and suitable for industrial temperature controllers, PLC analog input modules, and smart pressure transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS114S08IPBS 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 signal chains.
The ADS114S0x family was designed specifically for high-integration, low-power industrial sensor front-ends - consolidating PGA, reference, IDACs, and diagnostics into a single package to simplify ruggedized measurement systems.
FAQ
What is the maximum number of analog input channels supported by the ADS114S08IPBS?
The ADS114S08IPBS supports up to 12 independently selectable analog input channels, including AIN0–AIN5, AIN6–AIN11 (via REFP1/AIN6, REFN1/AIN7, GPIO0/AIN8, GPIO1/AIN9, GPIO2/AIN10, GPIO3/AIN11), and AINCOM. This configuration is confirmed in the device's functional block diagram and pin function table for the ADS114S08 variant.
Does the ADS114S08IPBS require an external crystal or oscillator?
No, the ADS114S08IPBS integrates a 4.096-MHz internal oscillator with ±1.5% accuracy, eliminating the need for external timing components. An external clock may be applied via the CLK pin if tighter frequency tolerance is required, but it is optional - the internal oscillator is fully functional for all standard operating modes of the ADS114S08IPBS.
Can the ADS114S08IPBS perform simultaneous 50-Hz and 60-Hz line-frequency rejection?
Yes, the ADS114S08IPBS achieves simultaneous 50-Hz and 60-Hz rejection at data rates ≤20 SPS using its sinc3 digital filter, delivering ≥88 dB normal-mode rejection ratio (NMRR) under those conditions. This capability is explicitly specified in the Electrical Characteristics table and applies directly to the ADS114S08IPBS under recommended operating conditions.
What are the supply voltage requirements for the ADS114S08IPBS analog and digital domains?
The ADS114S08IPBS requires AVDD–AVSS = 2.7 V to 5.25 V (unipolar) or ±2.5 V (bipolar) for analog operation, DVDD–DGND = 2.7 V to 3.6 V for digital core, and IOVDD–DGND = DVDD to 5.25 V for digital I/O. These ranges are defined in Section 7.3 of the datasheet and apply to all functional modes of the ADS114S08IPBS.
How does the burnout detection feature work on the ADS114S08IPBS?
The ADS114S08IPBS includes dedicated burnout current sources (0.2 µA, 1 µA, or 10 µA) that can be enabled to detect open-circuit conditions in RTDs or thermocouples. When activated, these currents flow through the sensor path; absence of expected voltage drop at AINx triggers a fault flag - a capability documented in the "Burnout Detect" block of the functional diagram and verified in the Electrical Characteristics table for the ADS114S08IPBS.
ADS114S08IPBS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-TQFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 4k
- Number of Inputs:
- 12
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- PGA, Temperature Sensor
- Operating Temperature:
- -50°C ~ 125°C
- Supplier Device Package:
- 32-TQFP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS114S08IPBS FAQ
1.How can I place an order for ADS114S08IPBS through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS114S08IPBS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS114S08IPBS reliable?
The price and inventory of ADS114S08IPBS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS114S08IPBS is usually 5 days.
3.What payment methods are accepted for ADS114S08IPBS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS114S08IPBS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS114S08IPBS?
ADS114S08IPBS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS114S08IPBS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS114S08IPBS?
For technical support, including ADS114S08IPBS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS114S08IPBS requirements.
6.How does Aetrix verify that ADS114S08IPBS is sourced from the original manufacturer or authorized distributors?
All ADS114S08IPBS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS114S08IPBS meets industry standards.
7.What is the process for return or replacement of ADS114S08IPBS?
All ADS114S08IPBS units undergo pre-shipment inspection (PSI). If there is an issue with ADS114S08IPBS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS114S08IPBS part is unused and in its original packaging.
Return procedure for ADS114S08IPBS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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