Overview
The ADS7946SRTER, produced by Texas Instruments, is a 14-bit, 2 MSPS (mega-samples per second) analog-to-digital converter (ADC) designed for high-performance and low-power applications. This device supports both differential and single-ended input configurations, making it versatile for various analog signal processing needs. The ADS7946 is part of the ADS7945/6 family and is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices, offering ease of integration and scalability in system design.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 14 Bits | |
| Sample Rate | 2 MSPS | |
| Analog Supply Range | 2.7 to 5.25 V | V |
| Digital Supply Range | 1.65 to AVDD V | V |
| Full-Scale Input Span (Differential) | ±VREF | V |
| Full-Scale Input Span (Single-Ended) | 0 to VREF | V |
| Integral Linearity (Differential) | –1.5 to 1.5 LSB | LSB |
| Integral Linearity (Single-Ended) | –2.5 to 2.5 LSB | LSB |
| Signal-to-Noise Ratio (SNR) | 80 dB (Single-Ended), 84 dB (Differential) | dB |
| Power Consumption at 2 MSPS | 11.6 mW | mW |
| Operating Temperature Range | –40 to +125 °C | °C |
Key Features
- High Resolution and Sample Rate: 14-bit resolution with a sample rate of up to 2 MSPS.
- Dual-Channel Input: Supports both differential and single-ended input configurations.
- Low Power Consumption: Operates at 11.6 mW at 2 MSPS, with auto power-down at lower speeds.
- Wide Analog Supply Range: Allows full-scale input range to extend to ±5 V differential or 5 V single-ended.
- Simple SPI Interface: Digital supply can operate as low as 1.65 V, facilitating easy interfacing with various digital systems.
- Outstanding Performance: Features excellent dc precision and dynamic performance, including high SNR and low THD.
- Pin Compatibility: Pin-compatible with the 8/10/12-bit ADS7947/8/9 family, enhancing design flexibility.
Applications
- Industrial Automation: Suitable for precision measurement and control systems.
- Medical Devices: Ideal for medical imaging, patient monitoring, and diagnostic equipment.
- Aerospace and Defense: Used in various military and aerospace applications requiring high precision and reliability.
- Test and Measurement: Employed in data acquisition systems, oscilloscopes, and other test equipment.
- Automotive Systems: Applied in automotive sensors, infotainment systems, and other vehicle electronics.
Q & A
- What is the resolution and sample rate of the ADS7946?
The ADS7946 has a 14-bit resolution and a sample rate of up to 2 MSPS.
- What types of input configurations does the ADS7946 support?
The ADS7946 supports both differential and single-ended input configurations.
- What is the power consumption of the ADS7946 at 2 MSPS?
The power consumption is 11.6 mW at 2 MSPS.
- What is the operating temperature range of the ADS7946?
The operating temperature range is –40 to +125 °C.
- Is the ADS7946 pin-compatible with other ADCs?
Yes, it is pin-compatible with the 8/10/12-bit ADS7947/8/9 family.
- What is the full-scale input range for differential inputs?
The full-scale input range for differential inputs is ±VREF.
- What is the signal-to-noise ratio (SNR) of the ADS7946?
The SNR is 80 dB for single-ended inputs and 84 dB for differential inputs.
- Does the ADS7946 have an auto power-down feature?
Yes, it has an auto power-down feature at lower speeds.
- What type of digital interface does the ADS7946 use?
The ADS7946 uses a simple SPI interface.
- What are some typical applications of the ADS7946?
Typical applications include industrial automation, medical devices, aerospace and defense, test and measurement, and automotive systems.
