Overview
The ADS1218Y/250 is a precision, wide dynamic range, delta-sigma Analog-to-Digital (A/D) converter produced by Texas Instruments. This 24-bit resolution converter operates from 2.7V to 5.25V supplies and is designed for high-resolution measurement applications. It features eight multiplexed input channels, internal buffering for high input impedance, and burnout current sources for sensor detection. The device also includes a programmable gain amplifier (PGA) and on-board current DACs, making it suitable for various industrial and scientific applications.
Key Specifications
| Parameter | Description |
|---|---|
| Resolution | 24 bits |
| Effective Resolution | 22 bits (PGA = 1), 19 bits (PGA = 128) |
| Sampling Rate | Up to 1 kHz |
| Input Channels | 8 channels, differential |
| PGA Gain | 1 to 128 |
| Supply Voltage | 2.7V to 5.25V |
| Power Consumption | < 1 mW |
| Operating Temperature Range | -40°C to 85°C |
| Package | 48-pin TQFP (7x7) |
| Reference Voltage | On-chip 1.25V/2.5V, external differential reference 0.1V to 2.5V |
| Interface | SPI-compatible |
Key Features
- No missing codes performance
- 0.0015% Integral Non-Linearity (INL)
- Programmable data output rates up to 1 kHz
- Single cycle settling mode
- On-chip calibration
- 4K bytes of flash memory programmable from 2.7V to 5.25V
- Precision on-chip 1.25V/2.5V reference with 0.2% accuracy and 5 ppm/°C drift
- External differential reference option
- Pin-compatible with ADS1216
- Low power consumption (< 1 mW)
- Eight bits of digital I/O for input or output
Applications
- Industrial process control
- Liquid/gas chromatography
- Blood analysis
- Smart transmitters
- Portable instrumentation
- Weight scales
- Pressure transducers
Q & A
- What is the resolution of the ADS1218Y/250? The ADS1218Y/250 has a 24-bit resolution with no missing codes and an effective resolution of 22 bits at PGA = 1 and 19 bits at PGA = 128.
- What is the sampling rate of the ADS1218Y/250? The sampling rate can be up to 1 kHz.
- How many input channels does the ADS1218Y/250 have? It has eight multiplexed input channels.
- What is the gain range of the PGA in the ADS1218Y/250? The PGA provides selectable gains from 1 to 128.
- What is the supply voltage range for the ADS1218Y/250? The device operates from 2.7V to 5.25V.
- What is the power consumption of the ADS1218Y/250? The power consumption is less than 1 mW.
- What type of interface does the ADS1218Y/250 use? The device uses an SPI-compatible serial interface.
- Does the ADS1218Y/250 have on-chip calibration? Yes, it includes on-chip calibration.
- What is the operating temperature range of the ADS1218Y/250? The operating temperature range is -40°C to 85°C.
- What package type is the ADS1218Y/250 available in? It is available in a 48-pin TQFP (7x7) package.
