Overview
The ADS1211U is a high-precision, 24-bit delta-sigma analog-to-digital converter (ADC) manufactured by Texas Instruments. This device is designed for applications requiring high resolution and wide dynamic range, operating from a single +5V supply. It features differential inputs, making it ideal for direct connection to transducers or low-level voltage signals. The ADS1211U includes a 4-channel input multiplexer and is packaged in a 24-pin SOIC (DW) package, making it suitable for various industrial and instrumentation applications.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | ADS1211U |
| Resolution | 24-bit |
| Effective Resolution | 23 bits at 10Hz, 20 bits at 1000Hz |
| Sample Rate | Up to 15.6 kSPS |
| Input Type | Differential |
| Programmable Gain Amplifier | Gain range of 1 to 16 in binary steps |
| Interface | SPI compatible, 2-wire mode |
| Reference | Internal/External |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 24-pin SOIC (DW) |
| Package Dimensions | 7.5mm x 15.4mm x 2.35mm |
| RoHS Compliance | Yes |
Key Features
- Delta-Sigma Architecture: Provides wide dynamic range and ensures 22 bits of no missing code performance.
- High Effective Resolution: Achieves 23 bits at 10Hz and 20 bits at 1000Hz through the use of a low-noise input amplifier and Turbo modulator mode.
- Differential Inputs: Ideal for direct connection to transducers or low-level voltage signals.
- Programmable Gain Amplifier: With a gain range of 1 to 16 in binary steps, increasing the dynamic range of the converter.
- Flexible SPI Compatible Interface: Offers a synchronous serial interface with a two-wire control mode for low-cost isolation.
- Internal/External Reference: Allows for flexibility in reference voltage selection.
- On-Chip Self-Calibration: Ensures high accuracy and reliability.
- 4-Channel Input Multiplexer: Enables the conversion of multiple input channels.
Applications
- Industrial Process Control: Suitable for high-resolution measurement applications in industrial environments.
- Instrumentation: Ideal for use in various instrumentation applications requiring high precision and accuracy.
- Blood Analysis: Used in medical devices for precise blood analysis.
- Smart Transmitters: Enhances the performance of smart transmitters with its high-resolution conversion capabilities.
- Portable Instruments: Suitable for portable instrumentation due to its compact package and low power consumption.
- Weigh Scales: Used in weigh scales for accurate weight measurements).
- Pressure Transducers: Ideal for use with pressure transducers in various industrial and medical applications).
Q & A
- What is the resolution of the ADS1211U?
The ADS1211U has a 24-bit resolution with an effective resolution of 23 bits at 10Hz and 20 bits at 1000Hz).
- What is the sample rate of the ADS1211U?
The sample rate of the ADS1211U can go up to 15.6 kSPS).
- What type of inputs does the ADS1211U have?
The ADS1211U has differential inputs, ideal for direct connection to transducers or low-level voltage signals).
- Does the ADS1211U have a programmable gain amplifier?
Yes, the ADS1211U includes a programmable gain amplifier with a gain range of 1 to 16 in binary steps).
- What interface does the ADS1211U use?
The ADS1211U uses a SPI compatible interface with a two-wire control mode for low-cost isolation).
- Is the ADS1211U RoHS compliant?
Yes, the ADS1211U is RoHS compliant).
- What is the operating temperature range of the ADS1211U?
The operating temperature range of the ADS1211U is -40°C to 85°C).
- What package type is the ADS1211U available in?
The ADS1211U is available in a 24-pin SOIC (DW) package).
- Does the ADS1211U include an on-chip self-calibration feature?
Yes, the ADS1211U includes an on-chip self-calibration feature).
- What are some common applications of the ADS1211U?
The ADS1211U is commonly used in industrial process control, instrumentation, blood analysis, smart transmitters, portable instruments, weigh scales, and pressure transducers).
