Overview
The ADS1211UG4, produced by Texas Instruments, is a precision, 24-bit delta-sigma analog-to-digital converter (ADC) designed for high-resolution measurement applications. It operates from a single +5V supply and features differential inputs, making it ideal for direct connection to transducers or low-level voltage signals. The ADS1211 includes a 4-channel input multiplexer, a programmable gain amplifier, and a flexible SPI-compatible serial interface. This converter is known for its wide dynamic range and low noise performance, achieving effective resolutions of 23 bits at 10Hz and 20 bits at 1000Hz.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 24 |
| Number of Inputs | 4 (differential) |
| Data Interface | SPI-compatible SSI with 2-wire mode |
| Sampling Rate | Up to 16k samples per second |
| Programmable Gain Amplifier | Gains of 1, 2, 4, 8, or 16 |
| Reference Type | Internal/External |
| Supply Voltage (Analog/Digital) | 4.75V to 5.25V |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 24-SOIC (0.295", 7.50mm Width) |
| Power Dissipation | 26-40 mW (typical) |
Key Features
The ADS1211UG4 boasts several key features that make it a versatile and high-performance ADC:
- Delta-Sigma Architecture: Ensures a wide dynamic range and high resolution.
- Differential Inputs: Ideal for direct connection to transducers or low-level voltage signals.
- Programmable Gain Amplifier: With gains of 1, 2, 4, 8, or 16, increasing the dynamic range and simplifying the interface to common transducers.
- Flexible SPI-Compatible SSI Interface: Supports 2-wire mode for low-cost isolation.
- Programmable Cut-Off Frequency: Up to 15.6kHz.
- Internal/External Reference: Allows for flexibility in reference voltage selection.
- On-Chip Self-Calibration: Corrects for internal offset and gain errors, with optional continuous background calibration.
- 4-Channel Input Multiplexer: Enhances the converter's versatility in multi-channel applications.
Applications
The ADS1211UG4 is designed for various high-resolution measurement applications, including:
- Industrial Process Control: For precise monitoring and control in industrial environments.
- Smart Transmitters: Used in smart transmitter systems for accurate data transmission.
- Weigh Scales: Ensures high accuracy in weight measurement applications.
- Chromatography: Suitable for analytical instruments requiring high resolution.
- Portable Instrumentation: Ideal for portable devices that require precise measurements.
- Pressure Transducers: Used in applications where precise pressure measurements are critical.
- Automotive and Wireless Communications: Also applicable in automotive systems, micro and pico cell systems, and wireless broadband communications.
Q & A
- What is the resolution of the ADS1211UG4 ADC?
The ADS1211UG4 has a 24-bit resolution, with an effective resolution of 23 bits at 10Hz and 20 bits at 1000Hz. - How many input channels does the ADS1211UG4 have?
The ADS1211UG4 includes a 4-channel input multiplexer. - What is the supply voltage range for the ADS1211UG4?
The supply voltage range is from 4.75V to 5.25V. - What types of interfaces does the ADS1211UG4 support?
The ADS1211UG4 supports an SPI-compatible SSI interface with a 2-wire mode. - Can the ADS1211UG4 be used in high-temperature environments?
The operating temperature range is from -40°C to 85°C. - Does the ADS1211UG4 have built-in calibration features?
Yes, it includes on-chip self-calibration and system calibration capabilities. - What are the typical applications of the ADS1211UG4?
It is used in industrial process control, smart transmitters, weigh scales, chromatography, and portable instrumentation. - How does the programmable gain amplifier function in the ADS1211UG4?
The PGA can be set to gains of 1, 2, 4, 8, or 16, increasing the dynamic range and simplifying the interface to common transducers. - Can the ADS1211UG4 be used with both internal and external references?
Yes, it supports both internal and external reference voltages. - What is the power dissipation of the ADS1211UG4?
The typical power dissipation is between 26-40 mW.
