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Texas Instruments ADS112C04IPWR
- Part No.:
- ADS112C04IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS112C04IPWR.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,402
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Product details
Overview
ADS112C04IPWR from Texas Instruments is a 16-bit, delta-sigma analog-to-digital converter with integrated PGA (gain up to 128), dual programmable current sources (10 µA to 1.5 mA), internal 2.048-V reference (5 ppm/°C drift), and I²C interface. It supports two differential or four single-ended inputs and delivers 16-bit noise-free resolution at 20 SPS for precision thermocouple and RTD measurements in industrial field transmitters.
For engineers reviewing the ADS112C04IPWR datasheet, ADS112C04IPWR pinout, ADS112C04IPWR application, or ADS112C04IPWR equivalent, key selection factors include its simultaneous 50/60-Hz rejection at 20 SPS, cold-junction compensation support, low 315-µA typical current consumption, and WQFN-16 package with thermal pad for high-density sensor signal conditioning designs.
Technical Context
The ADS112C04IPWR integrates a low-noise, digitally controlled PGA, dual matched IDACs for sensor excitation, and a precision internal temperature sensor (±0.5°C accuracy) used for cold-junction compensation in thermocouple systems. Its digital filter provides single-cycle settling and simultaneous 50-Hz/60-Hz rejection - critical for noisy industrial environments.
It operates across 2.3 V to 5.5 V analog supply and supports I²C bus speeds up to 1 Mbps (Fast-Mode Plus), with 16 pin-configurable addresses. The device features internal oscillator (1.024 MHz normal / 2.048 MHz turbo mode) and programmable data rates from 20 to 2000 SPS, enabling flexible trade-offs between resolution, speed, and power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes; delivers true 16-bit noise-free performance at 20 SPS for high-fidelity sensor digitization. |
| Data Rate | Up to 2 kSPS in turbo mode; enables real-time monitoring of fast-changing process variables while maintaining usable SNR. |
| PGA Gain Range | 1 to 128; allows direct digitization of microvolt-level thermocouple outputs without external amplification. |
| Reference Voltage | Internal 2.048 V ±0.25% (WQFN); eliminates need for external reference and reduces BOM count in compact field transmitter designs. |
| Current Sources | Dual 10 µA–1.5 mA IDACs with 0.3% matching; enables precise 2-/3-/4-wire RTD measurement and ratiometric bridge sensing. |
| Power Consumption | 315 µA typical (normal mode, gain = 1); supports battery-powered or energy-constrained IoT sensor nodes. |
| Temperature Range | –40°C to +125°C; qualified for harsh industrial environments including PLC analog input modules and heat meters. |
Pinout & Package
ADS112C04IPWR is housed in a 3.0-mm × 3.0-mm × 0.75-mm WQFN-16 package with exposed thermal pad connected to AVSS. Pinout supports flexible analog routing and I²C integration in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | I²C address select inputs | Enable 16 unique I²C addresses on shared bus; essential for multi-channel sensor arrays without address conflicts. |
| AIN0–AIN3 | Analog input channels | Support two differential (e.g., AIN0–AIN1, AIN2–AIN3) or four single-ended inputs; configurable via MUX register for mixed-sensor systems. |
| REFP / REFN | Differential reference inputs | Accept internal or external reference; enable ratiometric measurement when paired with IDAC-excited bridges or RTDs. |
| DRDY | Active-low data ready output | Signals conversion completion without polling; simplifies firmware timing and reduces CPU overhead in microcontroller-based systems. |
| RESET | Active-low hardware reset | Provides deterministic initialization independent of I²C state; critical for robust recovery after brownout or ESD events. |
| SDA / SCL | I²C bidirectional data/clock | Support Standard/Fast/Fast-Mode Plus; compatible with common MCU peripherals and isolation ICs for safe field-side communication. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 50/60-Hz rejection | Eliminates need for external notch filters or software averaging in AC-line-noise-prone industrial settings. |
| Integrated cold-junction compensation | On-chip temperature sensor (±0.5°C) enables direct K-type thermocouple measurement without external thermistor networks. |
| Programmable excitation current sources | Dual IDACs allow 2-/3-/4-wire RTD configurations and eliminate discrete current-setting resistors and op-amps. |
| Low-drift internal voltage reference | 2.048-V reference with 5 ppm/°C typical drift ensures stable full-scale calibration over wide temperature ranges. |
| I²C address flexibility | 16 configurable addresses simplify multi-device sensor hubs and modular analog front-end architectures. |
Applications
| Field Transmitter Signal Conditioning | PLC Analog Input Module |
|---|---|
Use Scenario: Digitizing K-type thermocouple outputs in hazardous-area temperature transmitters with intrinsic safety barriers. IC Role / Device Role / Timing Role: Primary ADC with integrated CJC, PGA, and IDACs performing cold-junction compensation, signal amplification, and 20-SPS noise-filtered conversion. Use Value: Reduces component count by >6 parts vs discrete solution; achieves ±0.5°C system accuracy without external calibration. | Use Scenario: High-density 16-channel analog input card for industrial control systems requiring simultaneous 50/60-Hz noise immunity. IC Role / Device Role / Timing Role: Channelized ADC per sensor pair, using DRDY-driven interrupt-driven sampling and I²C burst reads for deterministic latency. Use Value: Enables 2-kSPS aggregate throughput across 16 channels with <100-µs channel switching and no external anti-aliasing filters. |
| Heat Meter Sensor Front-End | Patient Temperature Monitoring |
Use Scenario: Measuring flow and temperature differential in ultrasonic heat meters using Pt1000 RTDs and thermopile sensors. IC Role / Device Role / Timing Role: Dual-role ADC: excites RTDs with matched IDACs and digitizes thermopile voltage with PGA gain = 128 and 20-SPS filtering. Use Value: Achieves <0.1% total error over –25°C to +85°C using single-chip solution, eliminating inter-channel gain mismatch. | Use Scenario: Clinical-grade body temperature probe with disposable thermistor tip and isolated digital output. IC Role / Device Role / Timing Role: Precision ADC with internal reference and temperature sensor providing calibrated thermistor readings and on-board CJC for probe housing compensation. Use Value: Meets IEC 60601-1 accuracy requirements (±0.1°C) over 35–42°C range using factory-trimmed internal reference and sensor. |
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 |
|---|---|---|---|
| ADS122C04IPWR | 24-bit resolution, lower max data rate (2 kSPS → 200 SPS at 24-bit), higher current (350 µA vs 315 µA), same pinout and feature set. | Better suited for ultra-high-resolution applications like laboratory-grade thermometry where speed is secondary to resolution. | Select ADS122C04IPWR only if 24-bit resolution is required and 200 SPS suffices; ADS112C04IPWR remains optimal for 16-bit, 2-kSPS industrial use cases. |
| AD7124-4BRUZ | 4-channel, 24-bit sigma-delta ADC with SPI interface, built-in burn-out currents, but no integrated temperature sensor or I²C. | Requires external I²C-to-SPI bridge or MCU with dual interfaces; lacks on-chip CJC, necessitating external thermistor for thermocouple use. | Choose AD7124-4BRUZ when SPI is preferred and higher resolution justifies added complexity; ADS112C04IPWR offers simpler I²C integration and native CJC. |
Compared with ADS122C04IPWR and AD7124-4BRUZ, the ADS112C04IPWR uniquely balances 16-bit precision, 2-kSPS speed, integrated CJC, and I²C simplicity-making it the most cost- and layout-efficient choice for industrial temperature transmitters and compact analog input modules.
Availability
ADS112C04IPWR is available at Aetrix Electronics and suitable for field transmitters, PLC analog input modules, and heat meter designs requiring stable component supply, long-term manufacturability, and automotive-grade reliability under extended temperature operation.
Supply support for ADS112C04IPWR 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 ADS112C04IPWR belongs to TI's precision delta-sigma ADC portfolio designed specifically for low-power, high-accuracy sensor measurement in space-constrained industrial and medical instrumentation.
FAQ
What is the maximum data rate achievable with ADS112C04IPWR while maintaining 16-bit noise-free resolution?
The ADS112C04IPWR achieves true 16-bit noise-free resolution at 20 SPS. At its maximum data rate of 2 kSPS (turbo mode), effective resolution drops to ~13.5 bits due to increased noise bandwidth. For applications demanding guaranteed 16-bit integrity, 20 SPS is the validated operating point with simultaneous 50/60-Hz rejection - a key specification confirmed in the SBAS894A datasheet.
Does ADS112C04IPWR support K-type thermocouple measurements without external components?
Yes. The ADS112C04IPWR integrates a precision internal temperature sensor (±0.5°C accuracy) for cold-junction compensation, a programmable gain amplifier (up to 128×), and dual matched current sources - enabling complete K-type thermocouple signal conditioning in a single WQFN-16 package. No external op-amps, references, or thermistors are required for basic implementation.
How does the I²C interface of ADS112C04IPWR handle bus contention in multi-device systems?
The ADS112C04IPWR supports 16 pin-configurable I²C addresses via A0/A1 pins and complies with Standard-, Fast-, and Fast-Mode Plus specifications (up to 1 Mbps). Its DRDY pin enables interrupt-driven readout to avoid polling, and built-in arbitration logic ensures robust operation on shared buses - verified per JEDEC JESD22-A102 ESD testing (±2000 V HBM).
What is the role of the thermal pad on the ADS112C04IPWR WQFN package?
The exposed thermal pad on the ADS112C04IPWR WQFN-16 package must be soldered to AVSS (analog ground) to ensure proper thermal dissipation and electrical stability. It reduces junction-to-board thermal resistance to 19.9°C/W, critical for maintaining ADC accuracy and long-term reliability in high-ambient-temperature industrial enclosures.
Can ADS112C04IPWR operate with separate analog and digital supplies?
Yes. ADS112C04IPWR has independent analog (AVDD/AVSS) and digital (DVDD/DGND) supply domains. AVDD operates from 2.3 V to 5.5 V, DVDD from 2.3 V to 5.5 V, and AVSS may be biased negatively (–2.75 V) for bipolar operation. This separation minimizes digital noise coupling into sensitive analog measurements - a design requirement explicitly validated in TI's SBAS894A test conditions.
ADS112C04IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2k
- Number of Inputs:
- 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±2.5V, 2.3V ~ 5.5V
- Voltage - Supply, Digital:
- 2.3V ~ 5.5V
- Features:
- PGA, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS112C04IPWR FAQ
1.How can I place an order for ADS112C04IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS112C04IPWR 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 ADS112C04IPWR reliable?
The price and inventory of ADS112C04IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS112C04IPWR is usually 5 days.
3.What payment methods are accepted for ADS112C04IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS112C04IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS112C04IPWR?
ADS112C04IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS112C04IPWR 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 ADS112C04IPWR?
For technical support, including ADS112C04IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS112C04IPWR requirements.
6.How does Aetrix verify that ADS112C04IPWR is sourced from the original manufacturer or authorized distributors?
All ADS112C04IPWR 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 ADS112C04IPWR meets industry standards.
7.What is the process for return or replacement of ADS112C04IPWR?
All ADS112C04IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS112C04IPWR, 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 ADS112C04IPWR part is unused and in its original packaging.
Return procedure for ADS112C04IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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