Overview
The ADS1210U, produced by Texas Instruments, is a precision, 24-bit delta-sigma Analog-to-Digital (A/D) converter. It operates from a single +5V supply and is designed for high-resolution measurement applications. The converter features differential inputs, making it ideal for direct connection to transducers or low-level voltage signals. It includes a programmable gain amplifier and a flexible SPI-compatible synchronous serial interface. The ADS1210U is available in 18-pin DIP and 18-lead SOIC packages, making it versatile for various industrial and instrumentation uses.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Voltage Range | 0 | +5 | V | ||
| Input Impedance | G = Gain, TMR = Turbo Mode Rate | 4/(G • TMR) | MΩ | ||
| Programmable Gain Amplifier | User Programmable | 1 | 16 | ||
| Power Supply Voltage | 4.75 | 5.25 | V | ||
| Power Supply Current: Analog | 2 | mA | |||
| Power Supply Current: Digital | 3.5 | mA | |||
| Additional Analog Current with REFOUT Enabled | No Load | 1.6 | mA | ||
| Power Dissipation | TMR of 16 | 37 | 60 | mW | |
| Temperature Range | Specified | –40 | +85 | °C | |
| Storage Temperature Range | –60 | +125 | °C |
Key Features
- 24-bit Resolution: Achieves an effective resolution of 23 bits at 10Hz and 20 bits at 1000Hz.
- Differential Inputs: Ideal for direct connection to transducers or low-level voltage signals.
- Programmable Gain Amplifier: Gain range of 1 to 16 in binary steps.
- Flexible SPI-compatible Interface: Supports both self-clocked (Master Mode) and externally clocked (Slave Mode) operations.
- Turbo Mode: Increases the sampling rate of the input capacitor, allowing for higher performance at the same output data rate.
- On-chip Self-calibration: Corrects for internal offset and gain errors, and can be run automatically or continuously in the background.
- Internal/External Reference: Supports both internal and external reference options.
Applications
The ADS1210U is designed for high-resolution measurement applications in various fields, including:
- Smart Transmitters: For precise measurement and transmission of data.
- Industrial Process Control: For monitoring and controlling industrial processes.
- Weigh Scales: For accurate weight measurements.
- Chromatography: For precise analysis in chromatography systems.
- Portable Instrumentation: For use in portable measurement devices.
Q & A
- What is the resolution of the ADS1210U?
The ADS1210U has a 24-bit resolution, achieving an effective resolution of 23 bits at 10Hz and 20 bits at 1000Hz. - What is the input voltage range of the ADS1210U?
The input voltage range is from 0 to +5V, with the ability to handle common-mode voltages as long as the absolute input voltage does not go below AGND or above AVDD. - What are the available gain settings for the programmable gain amplifier?
The gain can be set to 1, 2, 4, 8, or 16 in binary steps. - What is the Turbo Mode feature?
Turbo Mode increases the sampling rate of the input capacitor, allowing for higher performance at the same output data rate. - Does the ADS1210U support internal and external references?
Yes, it supports both internal and external reference options. - What are the typical power supply currents for the ADS1210U?
The typical analog current is 2mA, and the typical digital current is 3.5mA. - What is the operating temperature range of the ADS1210U?
The specified temperature range is from –40°C to +85°C. - What are the common applications of the ADS1210U?
It is used in smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation. - How does the ADS1210U handle calibration?
The ADS1210U includes on-chip self-calibration that can correct for internal offset and gain errors, and can be run automatically or continuously in the background. - What interface does the ADS1210U use for data transfer?
The ADS1210U uses a flexible SPI-compatible synchronous serial interface that supports both self-clocked (Master Mode) and externally clocked (Slave Mode) operations.
