Overview
The ADS1247IPW from 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 are tailored for applications requiring precise analog-to-digital conversion. The ADS1247IPW features a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC, and an internal oscillator, making it an ideal solution for temperature sensor measurements, pressure measurements, and other small signal applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | - |
| Data Rate | Up to 2 kSPS | - |
| Number of Channels | 4 | - |
| 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 Gain Range | 1 to 128 | - |
| Internal Reference Voltage | 2.048 V | V |
| Reference Drift | 10 ppm/°C (Maximum) | ppm/°C |
| Package Type | TSSOP (20 pins) | - |
Key Features
- Low-noise programmable gain amplifier (PGA) with gains up to 128
- Precision delta-sigma (ΔΣ) ADC with single-cycle settling digital filter
- Internal low-drift voltage reference (2.048 V, 10 ppm/°C maximum drift)
- Dual-matched programmable excitation current sources (IDACs)
- Simultaneous 50-Hz and 60-Hz rejection at 20 SPS
- Analog multiplexer with 4 independently selectable inputs
- 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 (4 or 8, depending on the model)
Applications
- Temperature sensor measurements: RTDs, thermocouples, and thermistors
- Pressure measurements
- Flow meters
- Factory automation and process controls
- Other small signal measurements including resistive bridge sensors
Q & A
- What is the resolution of the ADS1247IPW ADC?
The ADS1247IPW has a resolution of 24 bits.
- What are the data rates supported by the ADS1247IPW?
The device supports programmable data rates up to 2 kSPS.
- How many channels does the ADS1247IPW have?
The ADS1247IPW has 4 channels.
- What is the operating temperature range of the ADS1247IPW?
The operating temperature range is –40°C to 125°C.
- What is the gain range of the PGA in the ADS1247IPW?
The PGA gain range is from 1 to 128.
- Does the ADS1247IPW have an internal voltage reference?
Yes, it has an internal low-drift voltage reference of 2.048 V.
- What types of sensors can the ADS1247IPW measure?
The device can measure temperature sensors such as RTDs, thermocouples, and thermistors.
- Does the ADS1247IPW support simultaneous 50-Hz and 60-Hz rejection?
Yes, it supports simultaneous 50-Hz and 60-Hz rejection at 20 SPS.
- What is the package type of the ADS1247IPW?
The package type is TSSOP with 20 pins.
- Does the ADS1247IPW have general-purpose digital I/Os?
Yes, it has 4 general-purpose digital I/Os.
