Overview
The ADS1242IPWR, produced by Texas Instruments, is a precision 24-bit analog-to-digital converter (ADC) designed for high-resolution measurement applications. This delta-sigma ADC operates from a supply voltage range of 2.7V to 5.25V and is known for its wide dynamic range and high accuracy. The device features up to eight multiplexed input channels, making it versatile for various measurement tasks. It includes a programmable gain amplifier (PGA) with gains ranging from 1 to 128, and an on-chip calibration system to ensure high precision. The ADS1242IPWR is suitable for applications in industrial process control, smart transmitters, weight scales, chromatography, and portable instrumentation.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 24 bits | |||
| Effective Resolution (PGA = 1) | 21 bits | |||
| Effective Resolution (PGA = 128) | 19 bits | |||
| Integral Nonlinearity (INL) | 0.0015% | % of FSR | ||
| Power Supply Voltage (VDD) | 2.7V | 5.25V | V | |
| Power Consumption (PGA = 1, Buffer OFF) | 240 µA | 375 µA | µA | |
| Operating Temperature Range | -40°C | 85°C | °C | |
| Storage Temperature Range | -60°C | 100°C | °C | |
| Master Clock Rate | 1 MHz | 5 MHz | MHz | |
| Programmable Gain Amplifier (PGA) Gains | 1 | 128 |
Key Features
- 24-bit resolution with no missing codes
- Simultaneous 50Hz and 60Hz rejection (–90dB minimum)
- Programmable gain amplifier (PGA) with gains from 1 to 128
- Single-cycle settling digital filter
- External differential reference input (0.1V to 5V)
- On-chip calibration
- SPI™ compatible serial interface
- Up to eight multiplexed input channels
- Burn-out current sources for sensor detection
- 8-bit digital-to-analog converter (DAC) for offset correction
Applications
- Industrial process control
- Liquid/gas chromatography
- Blood analysis
- Smart transmitters
- Portable instrumentation
- Weight scales
Q & A
- What is the resolution of the ADS1242IPWR?
The ADS1242IPWR has a 24-bit resolution.
- What is the effective resolution at different PGA settings?
The effective resolution is 21 bits at PGA = 1 and 19 bits at PGA = 128.
- What is the integral nonlinearity (INL) of the ADS1242IPWR?
The INL is 0.0015% of the full-scale range (FSR).
- What is the power supply voltage range for the ADS1242IPWR?
The power supply voltage range is from 2.7V to 5.25V.
- How much power does the ADS1242IPWR consume?
The power consumption is typically between 240 µA and 375 µA at PGA = 1 and buffer off.
- What is the operating temperature range for the ADS1242IPWR?
The operating temperature range is from -40°C to 85°C.
- What types of applications is the ADS1242IPWR suitable for?
The ADS1242IPWR is suitable for industrial process control, chromatography, blood analysis, smart transmitters, portable instrumentation, and weight scales.
- Does the ADS1242IPWR have built-in calibration?
Yes, the ADS1242IPWR features on-chip calibration.
- What is the purpose of the burn-out current sources in the ADS1242IPWR?
The burn-out current sources are used for detecting open or shorted sensors.
- What is the interface type of the ADS1242IPWR?
The ADS1242IPWR has an SPI™ compatible serial interface.
