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Texas Instruments ADS1112IDRCRG4
- Part No.:
- ADS1112IDRCRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ADS1112IDRCRG4.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,104
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Product details
Overview
ADS1112IDRCRG4 from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter with integrated PGA, 2.048V reference, I²C interface, and dual differential or triple single-ended input channels in a 10-pin SON (DRC) package. It delivers ±2.048V full-scale differential input range, 15–240 SPS programmable data rate, and continuous self-calibration for precision measurement in space-constrained systems such as portable instrumentation and smart transmitters.
For engineers reviewing the ADS1112IDRCRG4 datasheet, ADS1112IDRCRG4 pinout, ADS1112IDRCRG4 application, or ADS1112IDRCRG4 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional differences, and supply support for industrial embedded and sensor interface designs.
Technical Context
The ADS1112IDRCRG4 implements a delta-sigma modulation core with digital filtering, onboard 2.048V ±0.05% reference, and fixed-frequency oscillator - no external clock support. Its input multiplexer supports two differential (AIN0/AIN1, AIN2/AIN3) or three single-ended (AIN0, AIN1, AIN2 referenced to AIN3) configurations via INP bits in the configuration register.
It operates exclusively as an I²C slave with eight selectable addresses via A0/A1 pins, supports Standard/Fast/High-Speed I²C modes up to 3.4 MHz, and features automatic power-down after conversion in single-cycle mode. Gain settings (1×, 2×, 4×, 8×) directly scale input impedance (2.8 MΩ/PGA) and offset error (0.4–1.2 mV), while resolution varies per data rate: 12-bit at 240 SPS, 16-bit at 15 SPS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit max (15SPS), no missing codes; resolution drops to 12-bit at 240SPS - impacts dynamic range in high-speed sensing. |
| Data Rate | 15/30/60/240 SPS - selects trade-off between noise floor (lower rate = higher ENOB) and sampling responsiveness. |
| Input Range | ±2.048V differential (PGA=1); scales to ±256mV at PGA=8 - enables direct thermocouple or bridge sensor digitization without external amplification. |
| INL | ±0.01% of FSR max - ensures linearity error ≤±3.3 LSB at 16-bit full scale, critical for calibration-critical metrology. |
| Supply Current | 240 µA active, 0.05–2 µA power-down - allows battery operation >1 year in low-duty-cycle sensor nodes. |
| Reference Accuracy | 2.048V ±0.05% (±1.024 mV), 5 ppm/°C drift - eliminates need for external reference in cost-sensitive industrial transmitters. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive sensors and factory automation environments. |
Pinout & Package
ADS1112IDRCRG4 uses a 10-pin SON (Small Outline No-Lead, DRC) package - 3.0 mm × 3.0 mm, 0.5 mm pitch, wettable flank - suitable for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0 | Differential CH1+ / Single-ended CH1 | Positive input for first differential pair; accepts voltage up to VDD + 0.2V - requires source impedance ≤10 kΩ for <0.1% gain error at PGA=8. |
| AIN1 | Differential CH1− / Single-ended CH2 | Negative input for first differential pair; common-mode range GND − 0.2V to VDD + 0.2V - must be tied to AIN3 for single-ended mode. |
| GND | Analog/Digital Ground | Single ground plane required; separation from noisy digital returns prevents >1 LSB noise coupling into 16-bit measurements. |
| AIN2 | Differential CH2+ / Single-ended CH3 | Second differential input or third single-ended channel - shares same PGA and reference path as AIN0/AIN1. |
| AIN3 | Differential CH2− / Common Reference | Common input for all single-ended channels; used as negative reference for AIN0/AIN1/AIN2 - must be stable within 100 µV for <0.01% INL. |
| VDD | Power Supply | 2.7V–5.5V single supply; bypassed with 0.1 µF ceramic capacitor near pin - ripple >10 mVpp degrades SNR by ≥3 dB. |
| SDA | I²C Data Line | Open-drain bidirectional bus line; requires external pull-up (2.2–10 kΩ) - value selected based on bus capacitance and target I²C speed (up to 3.4 MHz). |
| SCL | I²C Clock Input | Input-only clock line; no clock stretching - simplifies firmware timing but requires master to manage arbitration in multi-slave buses. |
| A0 | I²C Address Select | Logic level sampled at power-up/reset; sets bit-1 of 7-bit slave address - enables up to 8 devices on same I²C bus without address conflict. |
| A1 | I²C Address Select | Logic level sampled at power-up/reset; sets bit-0 of 7-bit slave address - floating state is valid and maps to defined addresses per Table 4. |
Key Features
| Feature | Design Value |
|---|---|
| Onboard 2.048V reference | Eliminates external reference IC and layout area; ±0.05% initial accuracy and 5 ppm/°C drift meet Class A transmitter requirements without trimming. |
| Programmable gain amplifier (1×–8×) | Enables direct digitization of mV-level signals (e.g., RTD, thermocouple) without discrete op-amp stages - reduces BOM count and thermal EMF errors. |
| Continuous self-calibration | Maintains offset and gain stability over temperature and time without host intervention - removes need for periodic system recalibration in field-deployed equipment. |
| Single-cycle conversion mode | Reduces average current to sub-µA during idle periods - extends battery life in wireless sensor nodes where wake-up intervals exceed 1 second. |
| I²C-compatible interface with 8 addresses | Supports daisy-chained sensor arrays using only two MCU pins; address pins A0/A1 allow hardware-configurable addressing - avoids software-based address remapping. |
Applications
| Portable Instrumentation | Industrial Process Control |
|---|---|
Use Scenario: Handheld multimeter measuring thermocouple output and resistance temperature detectors (RTDs) with auto-ranging. IC Role / Device Role / Timing Role: ADC front-end digitizing bipolar differential inputs with programmable gain and internal reference - replaces external op-amp + reference + ADC chain. Use Value: 16-bit resolution at 15 SPS delivers 0.1°C temperature resolution over −200°C to +1372°C (Type K), eliminating interpolation firmware overhead. |
Use Scenario: 4–20 mA smart transmitter monitoring pressure, flow, or level with HART digital overlay. IC Role / Device Role / Timing Role: Precision analog acquisition engine interfacing with bridge sensors and providing calibrated digital output via microcontroller. Use Value: Onboard self-calibration maintains ±0.01% FSR accuracy over 10-year field life without factory recalibration - meets IEC 61298-2 Class 0.05 requirements. |
| Smart Transmitters | Factory Automation |
Use Scenario: Loop-powered field device converting strain gauge output to digital signal for Modbus RTU transmission. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC with integrated PGA and reference - enables single-chip analog front-end in 4 mA budget-constrained designs. Use Value: 240 µA active current and 0.05 µA power-down current allow full functionality within 3.5 mA loop margin - preserves diagnostic headroom for HART communication. |
Use Scenario: PLC analog input module acquiring signals from multiple temperature, vibration, and position sensors across production lines. IC Role / Device Role / Timing Role: Multi-channel ADC subsystem supporting configurable differential/single-ended inputs per channel - simplifies modular I/O card design. Use Value: Pin-selectable I²C addresses enable up to 8 ADS1112IDRCRG4 units on one bus - reduces isolation and level-shifting components per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1113IDRCT | Single differential channel only (AIN0/AIN1), identical PGA, reference, and I²C interface - lacks AIN2/AIN3 inputs and third single-ended channel. | Not suitable for dual-sensor or 3-channel acquisition; lower pin count and cost for dedicated single-pair measurement. | Select when only one differential sensor (e.g., load cell) is needed and board space/cost outweigh channel flexibility. |
| MCP3421A0T-E/CH | 18-bit delta-sigma ADC, 3.3V-only supply, fixed 15/60/240/360 SPS rates, no onboard reference - requires external 2.048V reference for same accuracy. | Higher resolution but narrower supply range and no internal reference - increases BOM and layout complexity for battery-powered designs. | Choose for ultra-high-resolution applications where 18-bit ENOB justifies added reference design effort and 3.3V system constraint. |
Compared with ADS1112IDRCRG4, ADS1113IDRCT sacrifices channel count for smaller footprint and lower unit cost in single-input systems, while MCP3421A0T-E/CH trades integrated reference and dual-supply flexibility for higher raw resolution - making ADS1112IDRCRG4 optimal for compact, self-contained, multi-sensor industrial interfaces.
Availability
ADS1112IDRCRG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for ADS1112IDRCRG4 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-grade ICs.
The ADS1112 product line was designed specifically for space- and power-constrained sensor interface applications - integrating reference, PGA, oscillator, and I²C interface to replace multi-component analog front-ends in portable and loop-powered systems.
FAQ
What is the maximum sampling rate of the ADS1112IDRCRG4 and how does it affect resolution?
The ADS1112IDRCRG4 supports four programmable data rates: 15, 30, 60, and 240 samples per second (SPS). At 15 SPS, it achieves full 16-bit resolution with no missing codes; resolution decreases to 12 bits at 240 SPS due to reduced digital filter settling time. This trade-off directly impacts effective number of bits (ENOB) - users selecting 240 SPS must accept higher quantization noise for faster response in dynamic monitoring applications.
Does the ADS1112IDRCRG4 require an external reference voltage?
No, the ADS1112IDRCRG4 includes a fully integrated 2.048V ±0.05% reference with 5 ppm/°C drift - it cannot accept or use an external reference. This internal reference is hardwired to the ADC core and defines the full-scale range (±2.048V differential at PGA=1). Using the internal reference eliminates layout sensitivity, reduces component count, and ensures guaranteed performance per datasheet specifications.
How many I²C addresses can be configured on the ADS1112IDRCRG4?
The ADS1112IDRCRG4 supports eight unique I²C slave addresses via two hardware-selectable pins (A0 and A1), each configurable as logic high, logic low, or floating. These combinations map to 7-bit addresses from 1001000b to 1001111b. The address is latched at power-up or after an I²C General Call Reset, enabling up to eight ADS1112IDRCRG4 devices on a single I²C bus without software address management.
What input configurations does the ADS1112IDRCRG4 support?
The ADS1112IDRCRG4 supports two differential input pairs (AIN0/AIN1 and AIN2/AIN3) or three single-ended inputs (AIN0, AIN1, AIN2) all referenced to AIN3 - selected via the INP[1:0] bits in the configuration register. In differential mode, common-mode rejection exceeds 95 dB at PGA=8; in single-ended mode, AIN3 serves as the shared reference node and must be stabilized to within 100 µV for optimal INL performance.
Is the ADS1112IDRCRG4 compatible with high-speed I²C mode?
Yes, the ADS1112IDRCRG4 is fully compatible with Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) I²C modes. High-Speed mode activation requires the master to send a special Hs master code (00001xxx) after START - the ADS1112IDRCRG4 responds by enabling internal filters and operating at up to 3.4 MHz. No firmware changes are needed beyond standard I²C initialization.
ADS1112IDRCRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 240
- Number of Inputs:
- 2, 3
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- PGA, Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSON (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1112IDRCRG4 FAQ
1.How can I place an order for ADS1112IDRCRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1112IDRCRG4 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 ADS1112IDRCRG4 reliable?
The price and inventory of ADS1112IDRCRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1112IDRCRG4 is usually 5 days.
3.What payment methods are accepted for ADS1112IDRCRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1112IDRCRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1112IDRCRG4?
ADS1112IDRCRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1112IDRCRG4 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 ADS1112IDRCRG4?
For technical support, including ADS1112IDRCRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1112IDRCRG4 requirements.
6.How does Aetrix verify that ADS1112IDRCRG4 is sourced from the original manufacturer or authorized distributors?
All ADS1112IDRCRG4 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 ADS1112IDRCRG4 meets industry standards.
7.What is the process for return or replacement of ADS1112IDRCRG4?
All ADS1112IDRCRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1112IDRCRG4, 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 ADS1112IDRCRG4 part is unused and in its original packaging.
Return procedure for ADS1112IDRCRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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