Overview
The AD7949SCPZ-EP-RL7 is a high-performance, 14-bit, 8-channel analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the PulSAR (Pulse Width Modulation Successive Approximation Register) ADC family and is designed for use in multichannel, low-power data acquisition systems. The AD7949 features a true 14-bit successive approximation register (SAR) ADC with no missing codes, an 8-channel multiplexer, an internal low-drift reference, a temperature sensor, and a selectable one-pole filter. It operates from a single power supply and uses a simple SPI interface for configuration and data transfer.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Number of Channels | 8 |
| Conversion Rate | 250 kSPS |
| Power Supply | Single supply (VDD) |
| Reference Voltage | Selectable: 2.5 V or 4.096 V |
| Interface | SPI |
| Package | 20-Lead LFCSP (4mm x 4mm w/ EP) |
| Operating Temperature Range | −40°C to +85°C (standard), −55°C to +125°C (extended) |
| Power Dissipation | Scales with throughput |
Key Features
- True 14-bit SAR ADC with no missing codes
- 8-channel multiplexer with low crosstalk, configurable for single-ended, differential, or bipolar inputs
- Internal low-drift reference (selectable 2.5 V or 4.096 V) and buffer
- Integrated temperature sensor
- Selectable one-pole filter
- Sequencer for continuous channel scanning
- Simple SPI interface for configuration and data transfer
- Low power consumption, scaling with throughput
Applications
The AD7949SCPZ-EP-RL7 is suitable for a variety of applications requiring high precision and low power consumption, such as:
- Medical devices (e.g., patient monitoring systems)
- Industrial automation and control systems
- Test and measurement equipment
- Aerospace and defense systems (with extended temperature range options)
- Automotive systems requiring high reliability and precision
Q & A
- What is the resolution of the AD7949SCPZ-EP-RL7 ADC?
The AD7949SCPZ-EP-RL7 has a resolution of 14 bits. - How many channels does the AD7949SCPZ-EP-RL7 support?
The device supports 8 channels. - What is the conversion rate of the AD7949SCPZ-EP-RL7?
The conversion rate is 250 kSPS. - What type of interface does the AD7949SCPZ-EP-RL7 use?
The device uses a simple SPI interface. - What are the operating temperature ranges for the AD7949SCPZ-EP-RL7?
The standard operating temperature range is −40°C to +85°C, and the extended range is −55°C to +125°C. - Does the AD7949SCPZ-EP-RL7 have an internal reference voltage?
Yes, it has an internal low-drift reference voltage that is selectable between 2.5 V and 4.096 V. - What package type is the AD7949SCPZ-EP-RL7 available in?
The device is available in a 20-Lead LFCSP package. - Is the AD7949SCPZ-EP-RL7 suitable for aerospace applications?
Yes, with its extended temperature range, it is suitable for aerospace and defense systems. - How does the power dissipation of the AD7949SCPZ-EP-RL7 behave?
The power dissipation scales with the throughput. - What additional components are integrated into the AD7949SCPZ-EP-RL7?
The device includes a temperature sensor, a selectable one-pole filter, and a sequencer for continuous channel scanning.
