Overview
The ADS7947SRTER, produced by Texas Instruments, is a 12-bit, 2 MSPS, dual-channel, pseudo-differential ultra-low power successive approximation register (SAR) analog-to-digital converter (ADC). This device is part of a pin-compatible family that includes 12-bit, 10-bit, and 8-bit versions, offering high resolution and high throughput. The ADS7947SRTER is designed for applications requiring high performance, low power consumption, and a small footprint.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 bits | |
| Sample Rate | 2 MSPS (up to 2.1 MSPS) | |
| Analog Supply Voltage | 2.7 V to 5.5 V | V |
| Digital Supply Voltage | 1.65 V to AVDD | V |
| Power Consumption at 2 MSPS | 7.5 mW | mW |
| Power Consumption at Lower Speeds | 3.8 mW at 500 kSPS, 0.8 mW at 100 kSPS, 0.16 mW at 20 kSPS | mW |
| Integral Nonlinearity (INL) | 1 LSB (max) | LSB |
| Signal-to-Noise Ratio (SNR) | 72 dB (min) | dB |
| Temperature Range | –40°C to +125°C | °C |
| Package Type | 3-mm × 3-mm WQFN | |
| Digital Interface | SPI-compatible serial interface |
Key Features
- High Resolution and Throughput: The ADS7947SRTER offers 12-bit resolution with a sample rate of up to 2.1 MSPS.
- Low Power Consumption: The device consumes 7.5 mW at 2 MSPS and significantly less at lower speeds, with automatic power-down capability.
- Wide Supply Range: Supports analog supply voltages from 2.7 V to 5.5 V and digital supply voltages from 1.65 V to AVDD.
- Excellent Performance: Features no missing codes, INL of 1 LSB (max), and SNR of 72 dB (min).
- Compact Package: Offered in a tiny 3-mm × 3-mm WQFN package.
- Extended Temperature Range: Fully specified over the temperature range of –40°C to +125°C.
- SPI-Compatible Serial Interface: Easy interfacing to a wide variety of digital controllers.
Applications
- Communication Systems: Suitable for high-speed data acquisition in communication systems.
- Optical Networking: Used in optical networking applications requiring high precision and low power.
- Medical Instrumentation: Ideal for medical devices needing accurate and efficient data conversion.
- Battery-Powered Equipment: Optimized for battery-powered devices due to its low power consumption.
- Data Acquisition Systems: Perfect for various data acquisition systems where high performance and low power are crucial.
Q & A
- What is the resolution of the ADS7947SRTER?
The ADS7947SRTER has a resolution of 12 bits.
- What is the maximum sample rate of the ADS7947SRTER?
The maximum sample rate of the ADS7947SRTER is up to 2.1 MSPS.
- What is the power consumption of the ADS7947SRTER at 2 MSPS?
The power consumption at 2 MSPS is 7.5 mW.
- What is the temperature range for the ADS7947SRTER?
The device is fully specified over the temperature range of –40°C to +125°C.
- What type of digital interface does the ADS7947SRTER use?
The ADS7947SRTER uses an SPI-compatible serial interface.
- What is the package type of the ADS7947SRTER?
The device is offered in a 3-mm × 3-mm WQFN package.
- Does the ADS7947SRTER support automatic power-down?
Yes, the device supports automatic power-down at lower speeds to reduce power consumption.
- What is the signal-to-noise ratio (SNR) of the ADS7947SRTER?
The SNR of the ADS7947SRTER is 72 dB (min).
- Is the ADS7947SRTER suitable for battery-powered equipment?
Yes, it is optimized for battery-powered equipment due to its low power consumption.
- What are some typical applications of the ADS7947SRTER?
Typical applications include communication systems, optical networking, medical instrumentation, and data acquisition systems.
