Overview
The ADS1258IRTCR from Texas Instruments is a high-performance, 24-bit, delta-sigma analog-to-digital converter (ADC) designed for a wide range of applications requiring precise and reliable data conversion. This 16-channel ADC features a flexible input multiplexer that can accept combinations of eight differential or 16 single-ended inputs. It operates with a full-scale differential range of 5V or a true bipolar range of ±2.5V when using a 5V reference. The ADS1258IRTCR is known for its low noise, high resolution, and robust system monitoring capabilities, making it suitable for demanding environments such as medical, avionics, process control, and industrial systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate (Fixed-Channel Mode) | 1.953 to 125 kSPS | |
| Data Rate (Auto-Scan Mode) | 1.805 to 23.739 kSPS/Channel | |
| Integral Nonlinearity (INL) | 0.0003% to 0.0010% of FSR | |
| Noise (RMS at 1.8kSPS) | 2.8µV | |
| Offset Drift | 0.02µV/°C to 0.1µV/°C | |
| Gain Drift | 0.4ppm/°C to 2ppm/°C | |
| Analog Supply Voltage | +5V or ±2.5V | V |
| Digital Supply Voltage | 2.7V to 5.25V | V |
| Power Dissipation | 42mW | |
| Package | QFN-48 |
Key Features
- Fixed-Channel or Automatic Channel Scan
- Single-Conversion Settled Data
- Low Noise: 2.8µV RMS at 1.8kSPS
- On-Chip Temperature, Reference, Offset, Gain, and Supply Voltage Readback
- Programmable Sensor Bias Current Sources
- Standby, Sleep, and Power-Down Modes
- 8 General-Purpose Inputs/Outputs (GPIO)
- 32.768kHz Crystal Oscillator or External Clock
- SPI™-Compatible Interface
- Open-Sensor Detection and Conversion Control Pin
Applications
- Medical Systems
- Avionics and Aerospace
- Process Control Systems
- Machine and System Monitoring
- Fast Scan Multi-Channel Instrumentation
- Industrial Systems
- Test and Measurement Systems
Q & A
- What is the resolution of the ADS1258IRTCR?
The ADS1258IRTCR has a resolution of 24 bits. - What are the data rates for the fixed-channel and auto-scan modes?
The data rate for the fixed-channel mode is from 1.953 to 125 kSPS, and for the auto-scan mode, it is from 1.805 to 23.739 kSPS per channel. - What is the noise performance of the ADS1258IRTCR?
The noise performance is 2.8µV RMS at 1.8kSPS. - What types of input configurations are supported by the ADS1258IRTCR?
The ADS1258IRTCR supports combinations of eight differential or 16 single-ended inputs. - What are the power supply requirements for the ADS1258IRTCR?
The analog supply voltage can be either +5V or ±2.5V, and the digital supply voltage ranges from 2.7V to 5.25V. - Does the ADS1258IRTCR have any power-saving modes?
Yes, it has standby, sleep, and power-down modes. - What communication interface does the ADS1258IRTCR use?
The ADS1258IRTCR uses an SPI™-compatible interface. - Can the ADS1258IRTCR be used for sensor biasing?
Yes, it has programmable sensor bias current sources. - What is the package type of the ADS1258IRTCR?
The ADS1258IRTCR is available in a QFN-48 package. - What are some typical applications of the ADS1258IRTCR?
Typical applications include medical systems, avionics, process control, machine and system monitoring, fast scan multi-channel instrumentation, industrial systems, and test and measurement systems.
