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Texas Instruments ADS1112IDGSR
- Part No.:
- ADS1112IDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS1112IDGSR.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,110
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Product details
Overview
ADS1112IDGSR from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter with integrated PGA, 2.048V reference, I²C interface, and MSOP-10 package. It supports two differential or three single-ended input channels, operates from 2.7V to 5.5V, delivers up to 16-bit resolution with no missing codes, and enables high-accuracy temperature measurement in space-constrained industrial sensors.
For engineers reviewing the ADS1112IDGSR datasheet, ADS1112IDGSR pinout, ADS1112IDGSR application, or ADS1112IDGSR equivalent, key selection criteria include its self-calibrating architecture, programmable data rates (15–240 SPS), onboard oscillator, ±2.048V full-scale range, and I²C address configurability via A0/A1 pins.
Technical Context
The ADS1112IDGSR implements a continuously self-calibrating delta-sigma modulator with digital filtering, eliminating external calibration components. Its input multiplexer selects between two differential pairs (AIN0/AIN1, AIN2/AIN3) or three single-ended inputs referenced to AIN3.
It integrates a fixed 2.048V internal reference (±0.05% accuracy, 5 ppm/°C drift) and a programmable gain amplifier (PGA) with gains of 1, 2, 4, or 8 - enabling precise low-level signal digitization without external amplification. The onboard oscillator drives all timing functions; no external clock is supported.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits at 15 SPS; no missing codes across all data rates |
| Input Configuration | Two differential (±2.048V FSR) or three single-ended channels with AIN3 as common |
| Data Rate | Programmable: 15/30/60/240 SPS - trade-off between resolution (12–16 bits) and speed |
| PGA Gain | Selectable 1×, 2×, 4×, or 8× - extends effective dynamic range for mV-level sensor outputs |
| Reference Accuracy | 2.048V ±0.05% (±1.024 mV), 5 ppm/°C drift - defines absolute measurement uncertainty |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V systems without level-shifting |
| Quiescent Current | 240 µA active, 0.05 µA power-down - enables battery-powered portable instrumentation |
Pinout & Package
ADS1112IDGSR is housed in a 10-pin MSOP package (DGS), 3.0 mm × 3.0 mm × 1.0 mm, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0 | Differential Channel 1 positive / Single-ended Channel 1 input | Primary analog input; used with AIN1 for differential bridge sensing |
| AIN1 | Differential Channel 1 negative / Single-ended Channel 2 input | Complements AIN0; forms first differential pair for ratiometric measurements |
| GND | Analog and digital ground reference | Common return path for analog inputs and digital logic; must be low-impedance |
| AIN2 | Differential Channel 2 positive / Single-ended Channel 3 input | Second analog input; used with AIN3 for thermistor or RTD biasing |
| AIN3 | Differential Channel 2 negative / Single-ended common reference | Shared reference node for single-ended mode; connects to sensor ground or bias point |
| VDD | Power supply input | Supplies both analog and digital sections; requires 0.1 µF local bypass capacitor |
| SDA | I²C bidirectional data line | Open-drain; requires external pull-up resistor (typically 4.7 kΩ at 100 kHz) |
| SCL | I²C clock input | Master-generated clock; no clock stretching - simplifies bus arbitration |
| A0 | I²C slave address bit 0 | Configures one of eight possible addresses; sampled at power-up or reset |
| A1 | I²C slave address bit 1 | Works with A0 to set unique I²C address in multi-device systems |
Key Features
| Feature | Design Value |
|---|---|
| Onboard 2.048V reference | Eliminates need for external precision reference; ensures consistent full-scale range across temperature |
| Continuous self-calibration | Removes offset/gain drift over time and temperature without user intervention or firmware overhead |
| Single-cycle conversion | Enables deterministic sampling intervals and reduces system latency in closed-loop control |
| I²C interface with 8 address options | Supports up to eight ADS1112IDGSR devices on one bus without address conflict or additional logic |
| Programmable gain amplifier (PGA) | Amplifies weak sensor signals before digitization - preserves SNR while avoiding ADC saturation |
Applications
| Temperature Sensing | Industrial Process Monitoring |
|---|---|
Use Scenario: Measuring resistance of Pt100 RTDs or NTC thermistors in HVAC controllers and environmental chambers. IC Role / Device Role / Timing Role: Precision analog front-end digitizing bipolar differential voltage from Wheatstone bridges or ratiometric sensor circuits. Use Value: 16-bit resolution and 0.01% INL enable ±0.1°C accuracy over −40°C to +85°C without external calibration. | Use Scenario: Monitoring pressure, flow, or level transmitters in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-power, isolated analog input channel converting 4–20 mA loop signals via precision shunt resistor. Use Value: 240 µA active current and programmable 15–240 SPS sampling support energy-efficient, responsive process feedback. |
| Portable Instrumentation | Smart Transmitter Interface |
Use Scenario: Battery-powered handheld multimeters and data loggers requiring high-resolution DC voltage measurement. IC Role / Device Role / Timing Role: Self-contained ADC subsystem handling signal conditioning, conversion, and I²C communication in minimal footprint. Use Value: MSOP-10 package and integrated reference/oscillator reduce BOM count by ≥4 components versus discrete solutions. | Use Scenario: Digitizing analog sensor outputs in IIoT edge nodes with microcontroller-based wireless gateways. IC Role / Device Role / Timing Role: I²C-slave ADC providing calibrated digital output to host MCU for cloud telemetry and diagnostics. Use Value: Eight configurable I²C addresses allow scalable sensor node expansion without hardware redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-to-digital conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, 16-bit, same MSOP-10 package; adds dedicated ALERT pin and higher data rate (860 SPS max) | Supports four single-ended inputs without multiplexing overhead; better suited for multi-sensor monitoring | Choose ADS1115IDGSR when expanding beyond three analog inputs or requiring interrupt-driven conversion completion |
| MCP3424-E/ST | 18-bit delta-sigma ADC, 4-channel, I²C, SOIC-14; no integrated reference (requires external 2.048V) | Higher resolution but larger footprint and external reference dependency increases design complexity | Prefer MCP3424-E/ST only if 18-bit resolution is mandatory and board area allows SOIC-14 and reference IC |
Compared with ADS1112IDGSR, ADS1115IDGSR offers greater channel density and faster throughput at identical size, while MCP3424-E/ST trades integration for raw resolution - making ADS1112IDGSR optimal for cost-sensitive, space-constrained 2–3 channel systems requiring zero-calibration operation.
Availability
ADS1112IDGSR is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitter designs requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for ADS1112IDGSR 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, embedded processing, and connectivity technologies with decades of precision data acquisition expertise.
The ADS1112 product line delivers compact, self-contained ADC solutions for battery-powered and space-constrained applications where integration, low power, and ease of use outweigh maximum resolution requirements.
FAQ
What is the operating temperature range for the ADS1112IDGSR?
The ADS1112IDGSR is specified for operation from −40°C to +85°C. This industrial-grade temperature range ensures reliable performance in factory automation equipment, outdoor environmental sensors, and portable test instruments exposed to ambient thermal variation. All electrical characteristics-including INL, offset error, and reference drift-are guaranteed across this full range.
Does the ADS1112IDGSR require an external reference voltage?
No, the ADS1112IDGSR does not require an external reference voltage. It integrates a precision 2.048V reference with ±0.05% initial accuracy and 5 ppm/°C drift. This reference is hardwired to the ADC core and cannot be overridden or replaced - ensuring consistent full-scale range and eliminating reference-related BOM items and layout sensitivity.
How many I²C addresses can be configured on the ADS1112IDGSR?
The ADS1112IDGSR supports eight unique I²C slave addresses via combinations of A0 and A1 pins (logic low, high, or floating). These pins are sampled at power-up or after an I²C general call reset, allowing up to eight ADS1112IDGSR devices to coexist on a single I²C bus without address conflict or additional hardware.
What is the maximum achievable resolution and corresponding data rate for the ADS1112IDGSR?
The ADS1112IDGSR achieves true 16-bit resolution with no missing codes at its slowest data rate of 15 SPS. At higher rates, resolution decreases: 15 bits at 30 SPS, 14 bits at 60 SPS, and 12 bits at 240 SPS. This trade-off is inherent to its delta-sigma architecture and enables flexible optimization between measurement precision and system responsiveness.
Can the ADS1112IDGSR operate from a 3.3V supply?
Yes, the ADS1112IDGSR operates fully across 2.7V to 5.5V, including standard 3.3V logic supplies. At 3.3V, it draws 240 µA typical active current and maintains all specifications - such as ±2.048V full-scale input range (scaled by PGA), I²C compatibility, and self-calibration behavior - making it ideal for mixed-voltage embedded systems.
ADS1112IDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1112IDGSR FAQ
1.How can I place an order for ADS1112IDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1112IDGSR 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 ADS1112IDGSR reliable?
The price and inventory of ADS1112IDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1112IDGSR is usually 5 days.
3.What payment methods are accepted for ADS1112IDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1112IDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1112IDGSR?
ADS1112IDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1112IDGSR 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 ADS1112IDGSR?
For technical support, including ADS1112IDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1112IDGSR requirements.
6.How does Aetrix verify that ADS1112IDGSR is sourced from the original manufacturer or authorized distributors?
All ADS1112IDGSR 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 ADS1112IDGSR meets industry standards.
7.What is the process for return or replacement of ADS1112IDGSR?
All ADS1112IDGSR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1112IDGSR, 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 ADS1112IDGSR part is unused and in its original packaging.
Return procedure for ADS1112IDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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