Overview
The ADS1262IPWR from Texas Instruments is a high-accuracy, 32-bit delta-sigma (ΔΣ) analog-to-digital converter (ADC) designed for demanding sensor applications. This device is part of the ADS126x family, which includes the ADS1262 and ADS1263, with the latter integrating an auxiliary 24-bit ΔΣ ADC for background measurements. The ADS1262IPWR offers a comprehensive one-chip measurement solution, featuring a low-noise CMOS programmable gain amplifier (PGA), an internal voltage reference, and internal fault monitors. It is particularly suited for applications requiring high precision and low drift, such as factory automation, instrumentation, and various sensor-based systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 32-bit | |
| Data Rates | 2.5 SPS to 38400 SPS | |
| PGA Gains | 1 to 32 | |
| Analog Inputs | 11 multifunction analog inputs | |
| Offset Drift | 1 nV/°C | |
| Gain Drift | 0.5 ppm/°C | |
| Noise | 7 nV RMS (2.5 SPS, gain = 32) | |
| Linearity | 3 ppm | |
| Internal Voltage Reference | 2.5 V, temperature drift: 2 ppm/°C | |
| Package | 28-pin TSSOP | |
| Operating Temperature Range | –40°C to +125°C |
Key Features
- High-Accuracy Architecture: Low offset drift (1 nV/°C), low gain drift (0.5 ppm/°C), and high linearity (3 ppm).
- Integrated PGA and Voltage Reference: CMOS PGA with gains from 1 to 32 and a 2.5-V internal voltage reference with low temperature drift.
- Flexible Analog Front-End (AFE): Includes two sensor-excitation current sources suitable for direct RTD measurement.
- Single-Cycle Settled Conversions: Maximizes multiple-input conversion throughput with 130-dB rejection of 50-Hz and 60-Hz line cycle interference.
- Internal Fault Monitors and ADC Test Signal: Enhances reliability and diagnostic capabilities.
- General-Purpose Inputs/Outputs: 8 GPIOs for additional functionality.
Applications
- Factory Automation and Control: Analog input modules, temperature controllers, and weigh modules.
- Instrumentation: Process analytics, lab and field instrumentation, and weigh scales.
- Sensor Applications: Weigh scales, strain-gauge sensors, thermocouples, and resistance temperature devices (RTD).
Q & A
- What is the resolution of the ADS1262IPWR?
The ADS1262IPWR has a 32-bit resolution.
- What are the data rates supported by the ADS1262IPWR?
The data rates range from 2.5 SPS to 38400 SPS.
- What are the gains available on the PGA of the ADS1262IPWR?
The PGA gains range from 1 to 32.
- How many analog inputs does the ADS1262IPWR have?
The device has 11 multifunction analog inputs.
- What is the offset drift of the ADS1262IPWR?
The offset drift is 1 nV/°C.
- What is the gain drift of the ADS1262IPWR?
The gain drift is 0.5 ppm/°C.
- What is the noise performance of the ADS1262IPWR at 2.5 SPS and gain = 32?
The noise is 7 nV RMS.
- What is the linearity of the ADS1262IPWR?
The linearity is 3 ppm.
- What is the internal voltage reference of the ADS1262IPWR and its temperature drift?
The internal voltage reference is 2.5 V with a temperature drift of 2 ppm/°C.
- In what package is the ADS1262IPWR available?
The device is available in a 28-pin TSSOP package.
