Overview
The Texas Instruments ADS1148IPWR is a precision 16-bit analog-to-digital converter (ADC) designed for high-accuracy sensor measurement applications. This device integrates multiple features to reduce system cost and component count, making it an ideal solution for temperature sensor measurements, including thermocouples, thermistors, and resistance temperature detectors (RTDs), as well as other small signal measurements like resistive bridge sensors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16-bit | |
| Sampling Rate | Up to 2 kSPS | |
| Programmable Gain | 1 V/V to 128 V/V | |
| 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 |
| Input Multiplexer | 8 independently selectable differential inputs | |
| Internal Reference | Low-drift 2.048-V reference | V |
| Excitation Current Sources | Two matched programmable IDACs | |
| General-Purpose I/Os | 4 or 8 | |
| Internal Temperature Sensor | Yes | |
| Power Supply and VREF Monitoring | Yes | |
| Self and System Calibration | Yes | |
| Serial Interface | SPI™-Compatible |
Key Features
- Low-noise, programmable gain amplifier (PGA) with gains up to 128 V/V
- Precision delta-sigma (ΔΣ) ADC with single-cycle settling digital filter
- Internal oscillator and optional external clock input
- Simultaneous 50-Hz and 60-Hz interference rejection at 20 SPS or less
- Sensor burnout detection and voltage bias for thermocouples
- General-purpose digital I/Os and internal temperature sensor
- Power supply and VREF monitoring, along with self and system calibration capabilities
- SPI™-Compatible serial interface for data communication
Applications
- Temperature measurement: thermocouples, thermistors, and resistance temperature detectors (RTDs)
- Pressure measurement and flow meters
- Factory automation and process control
- Resistive bridge sensors and other small signal measurements
Q & A
- What is the resolution of the ADS1148IPWR ADC?
The ADS1148IPWR has a resolution of 16 bits. - What are the sampling rates supported by the ADS1148IPWR?
The device supports sampling rates up to 2 kSPS. - What is the range of programmable gain for the ADS1148IPWR?
The programmable gain ranges from 1 V/V to 128 V/V. - What are the power supply voltage ranges for the ADS1148IPWR?
The analog supply voltage can be unipolar (2.7 V to 5.25 V) or bipolar (±2.5 V), and the digital supply voltage ranges from 2.7 V to 5.25 V. - How many differential inputs does the ADS1148IPWR support?
The device supports 8 independently selectable differential inputs. - Does the ADS1148IPWR have an internal temperature sensor?
Yes, it includes an internal temperature sensor. - What type of serial interface does the ADS1148IPWR use?
The device uses an SPI™-Compatible serial interface. - Can the ADS1148IPWR reject 50-Hz and 60-Hz interference?
Yes, it can reject both 50-Hz and 60-Hz interference at data rates of 20 SPS or less. - Does the ADS1148IPWR support self and system calibration?
Yes, it supports both self and system calibration. - What are some common applications of the ADS1148IPWR?
Common applications include temperature measurement, pressure measurement, flow meters, factory automation, and process control.
