Overview
The Texas Instruments ADS1147IPWR is a 16-bit analog-to-digital converter (ADC) designed for precision sensor measurement applications. This device is part of the ADS1146, ADS1147, and ADS1148 family, which are known for their integrated features that reduce system cost and component count. The ADS1147IPWR 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 packaged in a TSSOP (PW) package with 20 pins and operates over a temperature range of -40°C to 105°C.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Data Rate | Up to 2 kSPS |
| Number of Inputs | 4 (differential) |
| Programmable Gain | 1 V/V to 128 V/V |
| Analog Supply | Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V) |
| Digital Supply | 2.7 V to 5.25 V |
| Internal Reference | Low-drift 2.048-V |
| Excitation Current Sources | Dual-matched programmable IDACs |
| Operating Temperature Range | -40°C to 105°C |
| Package Type | TSSOP (PW) with 20 pins |
Key Features
- Programmable data rates up to 2 kSPS
- Single-cycle settling for all data rates
- Simultaneous 50-Hz and 60-Hz rejection at 20 SPS
- Analog multiplexer with 4 independently selectable inputs
- Sensor burnout detection
- Internal temperature sensor
- Power supply and VREF monitoring
- Self and system calibration
- SPI™-compatible serial interface
- General-purpose digital I/Os (4 or 8)
Applications
The ADS1147IPWR is designed for various precision sensor measurement applications, including:
- Temperature sensors: thermocouples, thermistors, and resistance temperature detectors (RTDs)
- Resistive bridge sensors
- Other small signal measurements
Q & A
- What is the resolution of the ADS1147IPWR ADC?
The ADS1147IPWR has a 16-bit resolution.
- What are the programmable data rates of the ADS1147IPWR?
The data rates are programmable up to 2 kSPS.
- How many independently selectable inputs does the ADS1147IPWR have?
The ADS1147IPWR has 4 independently selectable differential inputs.
- What is the range of the programmable gain amplifier (PGA) in the ADS1147IPWR?
The PGA provides gains from 1 V/V to 128 V/V.
- Does the ADS1147IPWR have internal temperature sensing capabilities?
Yes, it includes an internal temperature sensor.
- What types of power supplies can the ADS1147IPWR operate with?
The device can operate with unipolar (2.7 V to 5.25 V) or bipolar (±2.5 V) analog supplies and 2.7 V to 5.25 V digital supplies.
- Does the ADS1147IPWR support simultaneous 50-Hz and 60-Hz rejection?
Yes, it supports simultaneous 50-Hz and 60-Hz rejection at data rates of 20 SPS or less.
- What kind of serial interface does the ADS1147IPWR use?
The device uses an SPI™-compatible serial interface.
- Does the ADS1147IPWR have sensor burnout detection?
Yes, it includes sensor burnout detection.
- What is the operating temperature range of the ADS1147IPWR?
The operating temperature range is -40°C to 105°C.
