Overview
The Texas Instruments ADS1246IPWR is a highly integrated, precision 24-bit analog-to-digital converter (ADC) designed for sensor measurement applications. This device features a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. It is particularly suited for temperature sensor measurements, including thermal couples, thermistors, and resistance temperature detectors (RTDs), as well as other small signal measurements such as resistive bridge sensors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate | Up to 2 kSPS | |
| Number of Channels | 1 | |
| Analog Supply Voltage | 2.7 V to 5.25 V (Unipolar), ±2.5 V (Bipolar) | V |
| Digital Supply Voltage | 2.7 V to 5.25 V | V |
| Operating Temperature | –40°C to 125°C | °C |
| PGA Noise | 48 nV RMS at PGA = 128 | nV |
| Internal Reference Drift | 10 ppm/°C (Maximum) | ppm/°C |
| Package Type | TSSOP-16 |
Key Features
- Programmable data rates up to 2 kSPS with single-cycle settling for all data rates.
- Simultaneous 50-Hz and 60-Hz rejection at 20 SPS.
- Low-noise PGA with selectable gains of 1 to 128.
- Dual-matched programmable excitation current sources.
- Low-drift internal 2.048-V reference.
- Sensor burn-out detection and voltage bias for thermocouples.
- Internal temperature sensor and power supply and VREF monitoring.
- Self and system calibration capabilities.
- SPI™-compatible serial interface.
- General-purpose digital I/Os.
Applications
- Temperature sensor measurements: RTDs, thermocouples, and thermistors.
- Pressure measurements.
- Flow meters.
- Factory automation and process controls.
Q & A
- What is the resolution of the ADS1246IPWR ADC?
The ADS1246IPWR has a 24-bit resolution.
- What are the programmable data rates of the ADS1246IPWR?
The data rates are programmable up to 2 kSPS.
- What type of PGA does the ADS1246IPWR feature?
The device features a low-noise, programmable gain amplifier (PGA) with gains selectable from 1 to 128.
- Does the ADS1246IPWR have internal temperature sensing capabilities?
- What is the operating temperature range of the ADS1246IPWR?
The operating temperature range is –40°C to 125°C.
- What types of sensors can the ADS1246IPWR measure?
The device is suitable for measuring temperature sensors such as RTDs, thermocouples, and thermistors, as well as other small signal measurements.
- Does the ADS1246IPWR support simultaneous 50-Hz and 60-Hz rejection?
- What is the noise level of the PGA in the ADS1246IPWR?
The PGA noise is 48 nV RMS at a gain of 128.
- Does the ADS1246IPWR have self and system calibration capabilities?
- What type of serial interface does the ADS1246IPWR use?
The device uses an SPI™-compatible serial interface.
