Overview
The ADS7949SRTER is a high-performance, ultra-low power, 8-bit successive approximation register (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS794x family, which includes pin-compatible 12-bit, 10-bit, and 8-bit versions, but the ADS7949 specifically is an 8-bit ADC. It is designed for applications requiring high resolution, high throughput, and low power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 8 | Bits |
| Sample Rate | Up to 3 MSPS | MSPS |
| Signal-to-Noise Ratio (SNR) | 72 dB (min) | dB |
| Power Consumption | 7.5 mW at 2 MSPS, 0.16 mW at 20 kSPS | mW |
| Analog Supply Voltage | 2.7 V to 5.5 V | V |
| Digital Supply Voltage | 1.65 V to AVDD | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | 3-mm × 3-mm WQFN | |
| Interface | SPI-compatible serial interface |
Key Features
High Resolution and Throughput: The ADS7949 offers an 8-bit resolution with a sample rate of up to 3 MSPS, making it suitable for high-speed data acquisition applications.
Low Power Consumption: The device features automatic power-down at lower speeds, significantly reducing power consumption to as low as 0.16 mW at 20 kSPS.
Wide Supply Range: It operates with an analog supply voltage range of 2.7 V to 5.5 V and a digital supply voltage range of 1.65 V to AVDD.
SPI-Compatible Interface: The device uses a simple SPI digital interface, facilitating easy integration with various digital controllers.
Extended Temperature Range: Fully specified over the temperature range of –40°C to +125°C, making it suitable for a wide range of applications.
Small Footprint: Housed in a compact 3-mm × 3-mm WQFN package, ideal for space-constrained designs.
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 such as ECG/EKG and other medical instrumentation.
Battery-Powered Equipment: Its low power consumption makes it suitable for battery-powered equipment.
Data Acquisition Systems: Widely used in various data acquisition systems where high performance and low power are critical.
Q & A
- What is the resolution of the ADS7949SRTER?
The ADS7949SRTER has an 8-bit resolution.
- What is the maximum sample rate of the ADS7949SRTER?
The maximum sample rate is up to 3 MSPS.
- What is the power consumption of the ADS7949SRTER at 2 MSPS?
The power consumption is approximately 7.5 mW at 2 MSPS.
- What is the operating temperature range of the ADS7949SRTER?
The device operates over a temperature range of –40°C to +125°C.
- What type of interface does the ADS7949SRTER use?
The device uses an SPI-compatible serial interface.
- What is the package type of the ADS7949SRTER?
The device is housed in a 3-mm × 3-mm WQFN package.
- Can the ADS7949SRTER be used in battery-powered equipment?
Yes, its low power consumption makes it suitable for battery-powered equipment.
- What are some common applications of the ADS7949SRTER?
Common applications include communication systems, optical networking, medical instrumentation, and data acquisition systems.
- How does the ADS7949SRTER manage power consumption at lower speeds?
The device features automatic power-down at lower speeds to dramatically reduce power consumption.
- What is the analog supply voltage range of the ADS7949SRTER?
The analog supply voltage range is from 2.7 V to 5.5 V.
