Overview
The ADS1258IRTCTG4, produced by Texas Instruments, is a 16-channel, low-noise, 24-bit delta-sigma analog-to-digital converter (ADC). This device is designed to provide high-precision and high-speed conversion capabilities, making it suitable for a variety of applications that require accurate and reliable data acquisition. The ADS1258 features a flexible input multiplexer that can accept combinations of eight differential or 16 single-ended inputs, with a full-scale differential range of 5V or a true bipolar range of ±2.5V when operating with a 5V reference. The converter includes a fourth-order delta-sigma modulator followed by a fifth-order sinc digital filter, optimized for low-noise performance.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 Bits, No Missing Codes |
| Fixed-Channel Data Rate | 125 kSPS |
| Auto-Scan Data Rate | 23.7 kSPS/Channel |
| Input Configuration | 16 Single-Ended or 8 Differential Inputs |
| Analog Supply Voltage | Unipolar (+5V) or Bipolar (±2.5V) |
| Digital Supply Voltage | 2.7V to 5.25V |
| Noise Performance | 2.8 µV RMS at 1.8 kSPS |
| Integral Nonlinearity | 0.0003% |
| DC Stability | 0.02 µV/°C Offset Drift, 0.4 ppm/°C Gain Drift |
| Power Dissipation | 42 mW |
| Package | QFN-48 |
| Operating Temperature Range | -40°C to 105°C |
Key Features
- Fixed-Channel or Automatic Channel Scan
- Single-Conversion Settled Data
- Low Noise: 2.8 µV RMS at 1.8 kSPS
- Open-Sensor Detection
- Conversion Control Pin
- Multiplexer Output for External Signal Conditioning
- On-Chip Temperature, Reference, Offset, Gain, and Supply Voltage Readback
- Standby, Sleep, and Power-Down Modes
- 8 General-Purpose Inputs/Outputs (GPIO)
- 32.768 kHz Crystal Oscillator or External Clock
- SPI™-compatible interface
- Programmable Sensor Bias Current Sources
Applications
- Medical Devices
- Avionics
- 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 ADS1258IRTCTG4?
The ADS1258IRTCTG4 has a resolution of 24 bits with no missing codes.
- What are the data rates for fixed-channel and auto-scan modes?
The fixed-channel data rate is 125 kSPS, and the auto-scan data rate is 23.7 kSPS per channel.
- How many input channels does the ADS1258IRTCTG4 support?
The device supports 16 single-ended or 8 differential input channels.
- What is the noise performance of the ADS1258IRTCTG4?
The noise performance is 2.8 µV RMS at 1.8 kSPS.
- What are the operating voltage ranges for the analog and digital supplies?
The analog supply voltage can be unipolar (+5V) or bipolar (±2.5V), and the digital supply voltage ranges from 2.7V to 5.25V.
- Does the ADS1258IRTCTG4 support external clock sources?
- What communication interface does the ADS1258IRTCTG4 use?
The device uses an SPI™-compatible interface for serial digital communication.
- What are the power consumption and power dissipation of the ADS1258IRTCTG4?
The power dissipation is 42 mW.
- What is the package type and pin count of the ADS1258IRTCTG4?
The device is available in a QFN-48 package.
- What are some typical applications of the ADS1258IRTCTG4?
Typical applications include medical devices, avionics, process control systems, machine and system monitoring, fast scan multi-channel instrumentation, industrial systems, and test and measurement systems.
