Overview
The ADS1174IPAPT, produced by Texas Instruments, is a quad-channel, 16-bit delta-sigma analog-to-digital converter (ADC). This device is designed for simultaneous sampling of four independent analog input channels, making it suitable for applications requiring high precision and low noise. The ADS1174 features advanced, 6th-order, chopper-stabilized delta-sigma modulators followed by low-ripple, linear phase FIR filters. This architecture ensures high signal-to-noise ratio (SNR), minimal passband ripple, and high stop band attenuation.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | 16 | Bits | |||
| Data Rate (fDATA) | High-Speed mode | 52,734 | SPS | ||
| Data Rate (fDATA) | Low-Power mode | 10,547 | SPS | ||
| Integral Nonlinearity (INL) | ±0.3 | ±1 | LSB | ||
| Offset Error | 0.3 | 2 | mV | ||
| Gain Error | 0.1 | 0.5 | % | ||
| Signal-to-Noise Ratio (SNR) | VIN = 1kHz, –0.5dBFS | 92 | 97 | dB | |
| Total Harmonic Distortion (THD) | VIN = 1kHz, –0.5dBFS | –105 | –96 | dB | |
| Power Dissipation | High-Speed mode | 135 | 210 | mW | |
| Power Dissipation | Low-Power mode | 30 | 55 | mW | |
| AVDD Voltage | 4.75 | 5 | 5.25 | V | |
| DVDD Voltage | 1.65 | 1.8 | 1.95 | V | |
| IOVDD Voltage | 1.65 | 3.6 | V |
Key Features
- Simultaneous Sampling: The ADS1174 allows for simultaneous sampling of four independent analog input channels, ensuring accurate and synchronized data acquisition.
- High Resolution and SNR: With a 16-bit resolution and a high SNR of up to 97 dB, this ADC provides precise and noise-free conversions.
- Selectable Operating Modes: The device offers both High-Speed and Low-Power modes, allowing for flexibility in power consumption and data rate.
- Low Ripple FIR Filters: The multi-stage FIR filters provide linear phase response with minimal passband ripple and high stop band attenuation.
- Daisy-Chainable Output: The ADS1174 supports daisy-chaining, making it convenient for use in systems requiring more than four channels.
- Serial Interface: Data is retrieved over a serial interface that supports both SPI and Frame-Sync formats.
Applications
- Industrial Automation: Suitable for precision measurement and control systems in industrial automation.
- Medical Devices: Used in medical equipment requiring high accuracy and low noise, such as ECG and EEG machines.
- Aerospace and Defense: Applied in various aerospace and defense applications where high reliability and precision are critical.
- Test and Measurement: Ideal for test and measurement equipment, including oscilloscopes and signal analyzers.
- Automotive Systems: Used in automotive systems for sensor data acquisition and monitoring.
Q & A
- What is the resolution of the ADS1174 ADC?
The ADS1174 has a 16-bit resolution.
- What are the operating modes available for the ADS1174?
The ADS1174 operates in both High-Speed and Low-Power modes.
- What is the maximum data rate of the ADS1174 in High-Speed mode?
The maximum data rate in High-Speed mode is 52,734 SPS.
- What is the signal-to-noise ratio (SNR) of the ADS1174?
The SNR of the ADS1174 is up to 97 dB.
- Does the ADS1174 support daisy-chaining?
Yes, the ADS1174 supports daisy-chaining, making it suitable for systems requiring more than four channels.
- What are the power supply voltage ranges for the ADS1174?
The AVDD voltage range is 4.75V to 5.25V, DVDD range is 1.65V to 1.95V, and IOVDD range is 1.65V to 3.6V.
- What types of serial interfaces does the ADS1174 support?
The ADS1174 supports both SPI and Frame-Sync serial interfaces.
- How many analog input channels does the ADS1174 have?
The ADS1174 has four independent analog input channels.
- What is the typical power dissipation of the ADS1174 in High-Speed mode?
The typical power dissipation in High-Speed mode is between 135mW and 210mW.
- What is the purpose of the VCOM output in the ADS1174?
The VCOM output provides an unbuffered analog output voltage equal to AVDD/2.
