Overview
The ADS1248IPWR, produced by Texas Instruments, is a highly integrated, precision 24-bit analog-to-digital converter (ADC) designed for high-accuracy sensor measurements. This device is part of the ADS1246, ADS1247, and ADS1248 family, which offers a comprehensive front-end solution for various sensor applications. The ADS1248IPWR features a low-noise programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC, and an internal oscillator, making it ideal for temperature sensor measurements, pressure measurements, and other industrial applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 Bits, No Missing Codes |
| Data Rate | Up to 2 kSPS |
| Input Channels | 8 Independently Selectable Inputs |
| PGA Noise | 48 nV RMS at PGA = 128 |
| Internal Reference | 2.048 V, 10 ppm/°C (Maximum) |
| Excitation Current Sources | Dual-Matched Programmable |
| Sensor Burn-Out Detection | Yes |
| General-Purpose I/Os | 8 |
| Internal Temperature Sensor | Yes |
| Power Supply | Analog: 2.7 V to 5.25 V (Unipolar), ±2.5 V (Bipolar); Digital: 2.7 V to 5.25 V |
| Operating Temperature | –40°C to 125°C |
| Interface | SPI™-Compatible Serial Interface |
Key Features
- Low-noise PGA with selectable gains of 1 to 128
- Single-cycle settling digital filter for fast channel cycling
- Simultaneous 50-Hz and 60-Hz interference rejection at 20 SPS
- Sensor burn-out detection and voltage bias for thermocouples
- Internal temperature sensor and power supply and VREF monitoring
- Self and system calibration capabilities
- Dual-matched programmable excitation current sources
- 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 ADS1248IPWR?
The ADS1248IPWR has a resolution of 24 bits with no missing codes. - What are the programmable data rates of the ADS1248IPWR?
The device supports programmable data rates up to 2 kSPS. - How many independently selectable input channels does the ADS1248IPWR have?
The ADS1248IPWR has 8 independently selectable input channels. - What is the noise level of the PGA at a gain of 128?
The PGA noise is 48 nV RMS at a gain of 128. - Does the ADS1248IPWR have an internal temperature sensor?
Yes, the ADS1248IPWR includes an internal temperature sensor. - What is the operating temperature range of the ADS1248IPWR?
The operating temperature range is –40°C to 125°C. - What type of serial interface does the ADS1248IPWR use?
The device uses an SPI™-compatible serial interface. - Does the ADS1248IPWR support simultaneous 50-Hz and 60-Hz interference rejection?
Yes, it supports simultaneous 50-Hz and 60-Hz interference rejection at 20 SPS. - What are the power supply options for the ADS1248IPWR?
The analog supply can be unipolar (2.7 V to 5.25 V) or bipolar (±2.5 V), and the digital supply ranges from 2.7 V to 5.25 V. - Does the ADS1248IPWR have sensor burn-out detection?
Yes, the device includes sensor burn-out detection.
