Overview
The ADS1246IPW, produced by Texas Instruments, is a highly integrated, precision 24-bit analog-to-digital converter (ADC) designed for precision sensor measurement applications. This device features an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. It provides a complete front-end solution for various sensor measurements, including temperature sensors such as thermocouples, thermistors, and resistance temperature detectors (RTDs), as well as other small signal measurements like resistive bridge sensors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate | Up to 2 kSPS | |
| PGA Gain | 1 to 128 | |
| Noise (PGA = 128) | 48 nV RMS | |
| Internal Reference Voltage | 2.048 V | |
| Reference Drift | 10 ppm/°C (Maximum) | |
| Analog Supply Voltage | 2.7 V to 5.25 V (Unipolar), ±2.5 V (Bipolar) | |
| Digital Supply Voltage | 2.7 V to 5.25 V | |
| Operating Temperature Range | -40°C to 125°C | |
| Package Type | TSSOP (16 pins) |
Key Features
- 24 Bits, No Missing Codes
- Programmable Data Rates Up to 2 kSPS
- Single-Cycle Settling for All Data Rates
- Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS
- Low-Noise PGA: 48 nV RMS at PGA = 128
- Dual-Matched Programmable Excitation Current Sources
- Low-Drift Internal 2.048-V Reference: 10 ppm/°C (Maximum)
- Sensor Burn-Out Detection
- Internal Temperature Sensor
- Power Supply and VREF Monitoring
- Self and System Calibration
- SPI™-Compatible Serial Interface
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 ADS1246IPW?
The ADS1246IPW has a resolution of 24 bits.
- What are the programmable data rates of the ADS1246IPW?
The device supports programmable data rates up to 2 kSPS.
- What is the noise performance of the PGA at maximum gain?
The PGA has a noise performance of 48 nV RMS at PGA = 128.
- Does the ADS1246IPW have internal temperature sensing capabilities?
- What types of supply voltages does the ADS1246IPW support?
The device supports unipolar (2.7 V to 5.25 V) and bipolar (±2.5 V) analog supply voltages, and 2.7 V to 5.25 V digital supply voltage.
- What is the operating temperature range of the ADS1246IPW?
The operating temperature range is -40°C to 125°C.
- What package type is the ADS1246IPW available in?
The device is available in a TSSOP (16 pins) package.
- Does the ADS1246IPW have sensor burn-out detection?
- What communication interface does the ADS1246IPW use?
The device uses an SPI™-Compatible Serial Interface.
- What are some common applications of the ADS1246IPW?
