Overview
The ADS1258IRTCT from Texas Instruments is a highly advanced 24-bit, delta-sigma analog-to-digital converter (ADC) designed for precision data acquisition. This component is part of the ADS1258 series and is packaged in a 48-pin VQFN-EP (7x7 mm) package. It features a fourth-order delta-sigma modulator followed by a fifth-order sinc digital filter, optimized for low-noise performance. The ADC supports 16 multiplexed channels, allowing for 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 voltage.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | ADS1258IRTCT |
| Package | VQFN-48-EP (7x7 mm) |
| Resolution | 24-bit |
| Sampling Rate | Up to 125 kSPS |
| Number of Channels | 16 (multiplexed) |
| Input Type | Eight differential or 16 single-ended inputs |
| Full-Scale Range | 5V differential or ±2.5V bipolar |
| Analog Supply Voltage | +5V (unipolar) or ±2.5V (bipolar) |
| Digital Supply Voltage | 2.7V to 5.25V |
| Interface | SPI-compatible |
| Operating Temperature | -40°C to 85°C |
Key Features
- High-resolution 24-bit delta-sigma ADC with low noise performance.
- Supports up to 16 multiplexed channels with flexible input configurations (eight differential or 16 single-ended inputs).
- Full-scale differential range of 5V or true bipolar range of ±2.5V with a 5V reference voltage.
- Onboard PLL generates the system clock from a 32.768kHz crystal or can be overridden by an external clock source.
- Buffered system clock output (15.7MHz) to drive a microcontroller or additional converters.
- Programmable sensor bias current sources for sensor biasing or integrity verification.
- Internal system monitor registers for supply voltage, temperature, reference voltage, gain, and offset data.
- SPI-compatible interface for serial digital communication.
Applications
The ADS1258IRTCT is suitable for a variety of applications requiring high precision and low noise, such as:
- Industrial automation and control systems.
- Medical devices, including patient monitoring and diagnostic equipment.
- Test and measurement instruments.
- Aerospace and defense systems.
- Automotive systems, particularly those requiring precise sensor data acquisition.
Q & A
- What is the resolution of the ADS1258IRTCT ADC?
The ADS1258IRTCT has a 24-bit resolution.
- How many channels does the ADS1258IRTCT support?
The ADS1258IRTCT supports up to 16 multiplexed channels.
- What are the input configurations supported by the ADS1258IRTCT?
The ADS1258IRTCT supports combinations of eight differential or 16 single-ended inputs.
- What is the sampling rate of the ADS1258IRTCT?
The sampling rate of the ADS1258IRTCT is up to 125 kSPS.
- What is the analog supply voltage range for the ADS1258IRTCT?
The analog supply voltage range is +5V (unipolar) or ±2.5V (bipolar).
- What digital interface does the ADS1258IRTCT use?
The ADS1258IRTCT uses an SPI-compatible interface for serial digital communication.
- Does the ADS1258IRTCT have onboard clock generation capabilities?
Yes, the ADS1258IRTCT has an onboard PLL that generates the system clock from a 32.768kHz crystal or can be overridden by an external clock source.
- What is the operating temperature range of the ADS1258IRTCT?
The operating temperature range is -40°C to 85°C.
- Does the ADS1258IRTCT support programmable sensor bias current sources?
Yes, the ADS1258IRTCT supports programmable sensor bias current sources for sensor biasing or integrity verification.
- What kind of system monitoring does the ADS1258IRTCT provide?
The ADS1258IRTCT provides internal system monitor registers for supply voltage, temperature, reference voltage, gain, and offset data.
