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Texas Instruments ADS1112IDRCR
- Part No.:
- ADS1112IDRCR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ADS1112IDRCR.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,548
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Product details
Overview
ADS1112IDRCR 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 high-accuracy sensor measurement in space-constrained industrial and portable systems.
For engineers reviewing the ADS1112IDRCR datasheet, ADS1112IDRCR pinout, ADS1112IDRCR application, or ADS1112IDRCR equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready availability details - all specific to the ADS1112IDRCR variant in SON-10 (DRC) packaging with −40°C to +85°C operating range.
Technical Context
The ADS1112IDRCR implements a switched-capacitor delta-sigma modulator with digital filtering, onboard 2.048V ±0.05% reference, and fixed-frequency oscillator (nominally 275 kHz). Its 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 uses I²C-compatible serial communication with eight user-selectable slave addresses via A0/A1 pins, operates from 2.7V to 5.5V, and features automatic power-down in single-conversion mode. Gain settings (1×, 2×, 4×, 8×) are controlled by PGA0/PGA1 bits, and resolution scales inversely with data rate: 12-bit at 240 SPS, up to 16-bit at 15 SPS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes; enables 15.3-µV LSB at 15 SPS (±2.048V range) |
| Data Rate | Programmable 15/30/60/240 SPS; trade-off between resolution (12–16 bit) and speed |
| Input Range | ±2.048V differential (full-scale); determined by internal 2.048V reference and PGA gain |
| INL | ±0.01% of FSR max; ensures linearity error ≤ ±410 µV over full scale at PGA = 1 |
| Supply Current | 240 µA typical active; drops to 0.05–2 µA in power-down mode for battery-sensitive designs |
| Reference Accuracy | 2.048 V ±0.05% (±1.02 mV); drift ≤5 ppm/°C supports stable measurements across temperature |
| Operating Temp | −40°C to +85°C; qualified for industrial environments without derating |
Pinout & Package
ADS1112IDRCR is housed in a 3 mm × 3 mm, 10-pin SON (Small Outline No-Lead, DRC) package with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0 | Differential Channel 1 Positive Input / Single-ended Channel 1 Input | Primary positive input for first differential pair or first single-ended channel; must remain within GND−0.2V to VDD+0.2V |
| AIN1 | Differential Channel 1 Negative Input / Single-ended Channel 2 Input | Negative input for first differential pair or second single-ended channel; shares common-mode constraints with AIN0 |
| GND | Analog and Digital Ground Reference | Single ground connection for both analog and digital sections; requires low-impedance PCB return path |
| AIN2 | Differential Channel 2 Positive Input / Single-ended Channel 3 Input | Positive input for second differential pair or third single-ended channel; referenced to AIN3 in single-ended mode |
| AIN3 | Differential Channel 2 Negative Input / Single-ended Common Input | Common reference node for all single-ended inputs; serves as negative input for second differential pair |
| VDD | Power Supply Input | Accepts 2.7V–5.5V; powers internal oscillator, PGA, ADC core, and I²C interface |
| SDA | I²C Serial Data Line | Open-drain bidirectional bus line; requires external pull-up resistor (typically 2.2–10 kΩ) |
| SCL | I²C Serial Clock Input | Input-only clock line driven by master; supports Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes |
| A0 | I²C Slave Address Select Bit 0 | Configures LSB of 7-bit address; sampled at power-up or after General Call Reset |
| A1 | I²C Slave Address Select Bit 1 | Configures MSB of 7-bit address; enables up to eight ADS1112IDRCR devices on same I²C bus |
Key Features
| Feature | Design Value |
|---|---|
| Onboard 2.048V reference | Eliminates need for external precision reference; accuracy ±0.05% and drift ≤5 ppm/°C directly define system-level offset stability |
| Programmable gain amplifier (PGA) | Four selectable gains (1×–8×) enable direct digitization of mV-level sensor outputs without external amplification |
| Continuous self-calibration | Automatically corrects offset and gain errors in real time; no host intervention or calibration routines required |
| Single-cycle conversion | Completes full conversion in one data-rate period (e.g., 66.7 ms at 15 SPS); simplifies timing-critical firmware logic |
| I²C interface with 8 addresses | Two hardware address pins (A0/A1) support multi-device networks without address conflicts or software reconfiguration |
Applications
| Temperature Monitoring System | Industrial Pressure Transmitter |
|---|---|
Use Scenario: Measuring thermistor or RTD voltage in handheld HVAC diagnostic tools with battery life constraints. IC Role / Device Role / Timing Role: ADC front-end converting ratiometric bridge output to digital; handles bipolar differential input and rejects common-mode noise. Use Value: 16-bit resolution at 15 SPS delivers <10 mK temperature resolution; 240 µA active current extends battery runtime in portable instruments. |
Use Scenario: Digitizing 4–20 mA loop sensor output in factory-floor pressure transmitters with limited board area. IC Role / Device Role / Timing Role: Precision signal conditioner interfacing strain-gauge bridges; uses PGA to amplify low-level mV signals before digitization. Use Value: Onboard 2.048V reference and ±0.01% INL ensure <0.1% FS accuracy over −40°C to +85°C without external trimming. |
| Smart Home Environmental Sensor | Portable Data Logger |
Use Scenario: Low-power CO₂ or VOC sensor node sampling air quality every 5 seconds in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Standalone ADC managing analog inputs from electrochemical sensors; enters power-down between conversions. Use Value: 0.05 µA power-down current minimizes quiescent drain; I²C interface allows direct connection to ultra-low-power MCU without level shifters. |
Use Scenario: Field-deployable vibration or acoustic logger capturing analog waveforms from piezoelectric sensors. IC Role / Device Role / Timing Role: High-resolution acquisition engine supporting 240 SPS burst mode for transient event capture. Use Value: 12-bit resolution at 240 SPS enables 8.2-kHz effective Nyquist bandwidth; internal oscillator eliminates need for external crystal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1113IDRCT | Same 10-pin SON package and pinout; single differential channel only (AIN0/AIN1), no AIN2/AIN3 support | Limited to one differential sensor; lacks third single-ended input capability | Select when only one differential measurement is needed and board layout reuse is critical |
| MCP3421A0T-E/CH | 18-bit delta-sigma ADC in SOT-23-6; fixed 2.048V reference; I²C interface; no multiplexer or PGA | No input channel selection or programmable gain; lower integration but higher resolution at 3.75 SPS | Choose for ultra-high-resolution static measurements where channel count and gain flexibility are secondary |
Compared with ADS1112IDRCR, ADS1113IDRCT reduces channel count but maintains identical footprint and power profile, while MCP3421A0T-E/CH trades multiplexing and PGA for higher resolution and smaller package - making ADS1112IDRCR optimal for multi-sensor, gain-adaptive industrial sensing where space and integration are constrained.
Availability
ADS1112IDRCR is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADS1112IDRCR 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 focused on analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS1112 product line delivers fully integrated, low-power, high-resolution ADC solutions specifically engineered for space- and power-constrained sensor interfaces in industrial automation, portable test equipment, and smart sensing nodes.
FAQ
What is the maximum sample rate supported by the ADS1112IDRCR?
The ADS1112IDRCR supports four programmable data rates: 15, 30, 60, and 240 samples per second (SPS). At 240 SPS, resolution is 12 bits with no missing codes; resolution increases to 16 bits at the lowest 15 SPS setting. The actual achievable rate depends on I²C bus speed and host processor overhead, but the ADS1112IDRCR's internal oscillator guarantees timing compliance across all modes.
Does the ADS1112IDRCR require an external reference voltage?
No, the ADS1112IDRCR does not require an external reference voltage. It integrates a precision 2.048V ±0.05% reference with 5 ppm/°C drift, which is used exclusively for ADC conversion. This reference is internal-only and cannot be accessed or measured externally - all specifications for gain error, INL, and offset include its contribution, ensuring end-to-end accuracy without external components.
Can the ADS1112IDRCR measure single-ended signals?
Yes, the ADS1112IDRCR can measure three single-ended signals: AIN0, AIN1, and AIN2, all referenced to AIN3 as the common input. This is configured via the INP bits (INP1/INP0 = 10 or 11) in the configuration register. In this mode, AIN3 serves as the shared reference node, enabling ratiometric measurements from resistive sensors or voltage dividers without additional op-amps.
What is the function of the A0 and A1 pins on the ADS1112IDRCR?
The A0 and A1 pins on the ADS1112IDRCR configure its I²C slave address, allowing up to eight devices on the same bus. Each pin can be tied HIGH, LOW, or left floating, producing eight unique 7-bit addresses (e.g., 1001000 to 1001111). Their states are latched at power-up or after an I²C General Call Reset, enabling flexible multi-device network design without software address assignment.
Is the ADS1112IDRCR compatible with fast-mode I²C (400 kHz)?
Yes, the ADS1112IDRCR is fully compatible with standard-mode (100 kHz), fast-mode (400 kHz), and high-speed mode (3.4 MHz) I²C buses. Its SDA and SCL pins meet I²C electrical specifications across all modes, including open-drain drive strength and timing margins. No configuration or external components are needed to operate at 400 kHz - simply ensure appropriate pull-up resistors and bus capacitance limits are observed.
ADS1112IDRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
ADS1112IDRCR FAQ
1.How can I place an order for ADS1112IDRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1112IDRCR 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 ADS1112IDRCR reliable?
The price and inventory of ADS1112IDRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1112IDRCR is usually 5 days.
3.What payment methods are accepted for ADS1112IDRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1112IDRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1112IDRCR?
ADS1112IDRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1112IDRCR 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 ADS1112IDRCR?
For technical support, including ADS1112IDRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1112IDRCR requirements.
6.How does Aetrix verify that ADS1112IDRCR is sourced from the original manufacturer or authorized distributors?
All ADS1112IDRCR 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 ADS1112IDRCR meets industry standards.
7.What is the process for return or replacement of ADS1112IDRCR?
All ADS1112IDRCR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1112IDRCR, 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 ADS1112IDRCR part is unused and in its original packaging.
Return procedure for ADS1112IDRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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