Overview
The ADS1112IDGSTG4, produced by Texas Instruments, is a precision 16-bit Analog-to-Digital (A/D) converter. This device is designed for high-resolution measurements and is particularly suited for applications where space and power consumption are critical. The ADS1112 features a continuously self-calibrating delta-sigma A/D converter core, an onboard 2.048V reference, a programmable gain amplifier (PGA), and an I2C-compatible serial interface. It is available in small MSOP-10 and leadless QFN-style packages, making it ideal for portable instrumentation, industrial process control, smart transmitters, and other consumer goods.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Resolution | 12 | 14 | 16 | Bits | |
| Data Rate | 15 SPS | 240 SPS | SPS | ||
| Full-Scale Input Voltage | ±2.048V/PGA | V | |||
| Analog Input Voltage | VIN+ to GND or VIN− to GND | GND − 0.2 | VDD + 0.2 | V | |
| Differential Input Impedance | PGA = 1, 2, 4, 8 | 2.8/PGA | MΩ | ||
| Common-Mode Input Impedance | PGA = 1, 2, 4, 8 | 3.5 | 0.9 | MΩ | |
| Power Supply | 2.7V | 5.5V | V | ||
| Current Consumption | 240µA | µA |
Key Features
- Precision 16-bit Analog-to-Digital conversion with no missing codes
- Continuously self-calibrating delta-sigma A/D converter core
- Onboard 2.048V reference with accuracy of ±0.05% and drift of 5ppm/°C
- Programmable gain amplifier (PGA) with gains up to 8
- I2C-compatible serial interface with eight addressable slave addresses
- Support for two differential or three single-ended channels
- Single-cycle conversion and low current consumption during idle periods
- Operating modes: continuous-conversion and single-conversion
- Onboard oscillator and reset functionality via I2C General Call Reset command
Applications
- Portable instrumentation
- Industrial process control
- Smart transmitters
- Consumer goods
- Factory automation
- Temperature measurement
Q & A
- What is the resolution of the ADS1112?
The ADS1112 has a resolution of up to 16 bits with no missing codes.
- What are the available data rates for the ADS1112?
The ADS1112 supports data rates of 15, 30, 60, and 240 samples per second (SPS).
- What is the input voltage range for the ADS1112?
The full-scale input voltage range is ±2.048V differentially, adjustable with the PGA.
- How does the ADS1112 manage power consumption?
The ADS1112 has low current consumption of 240µA and powers down after a conversion in single-conversion mode.
- What interface does the ADS1112 use for communication?
The ADS1112 uses an I2C-compatible serial interface.
- How many addressable slave addresses does the ADS1112 support?
The ADS1112 supports eight addressable slave addresses via its I2C interface.
- What are the operating modes of the ADS1112?
The ADS1112 operates in either continuous-conversion or single-conversion mode.
- Does the ADS1112 have onboard calibration?
Yes, the ADS1112 features continuous self-calibration circuitry that requires no user intervention.
- What is the power supply range for the ADS1112?
The ADS1112 operates from a single power supply ranging from 2.7V to 5.5V.
- What types of applications is the ADS1112 suited for?
The ADS1112 is suited for applications such as portable instrumentation, industrial process control, smart transmitters, and temperature measurement.
