Overview
The AD7949BCPZ from Analog Devices Inc. is a highly integrated, 8-channel, 14-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device is designed for use in multichannel, low power data acquisition systems. It operates from a single power supply, VDD, and features a simple SPI interface for configuration and data transfer. The AD7949BCPZ is housed in a compact 20-lead LFCSP package and is specified to operate over a temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Number of Channels | 8 | |
| Conversion Rate | 250 kSPS | |
| Power Supply | 2.3V to 5.5V | V |
| Package Type | 20-Lead LFCSP | |
| Operating Temperature | −40°C to +85°C | °C |
| Internal Reference | Selectable 2.5 V or 4.096 V | V |
| Interface | SPI | |
| Conversion Time | 2.2 µs | µs |
| Acquisition Time | 1.8 µs | µs |
Key Features
- True 14-bit SAR ADC with no missing codes
- 8-channel, low crosstalk multiplexer supporting single-ended, differential, or bipolar configurations
- 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
- Power dissipation scales with throughput
Applications
The AD7949BCPZ is suitable for a variety of applications requiring multichannel data acquisition, including:
- Industrial automation and control systems
- Medical devices and diagnostic equipment
- Aerospace and defense systems
- Automotive systems, especially those requiring multiple sensor inputs
- Test and measurement equipment
Q & A
- What is the resolution of the AD7949BCPZ ADC?
The AD7949BCPZ has a resolution of 14 bits.
- How many channels does the AD7949BCPZ support?
The AD7949BCPZ supports 8 channels.
- What is the conversion rate of the AD7949BCPZ?
The conversion rate of the AD7949BCPZ is 250 kSPS.
- What type of interface does the AD7949BCPZ use?
The AD7949BCPZ uses a simple SPI interface.
- What is the operating temperature range of the AD7949BCPZ?
The operating temperature range of the AD7949BCPZ is −40°C to +85°C.
- Does the AD7949BCPZ have an internal reference?
Yes, the AD7949BCPZ has an internal low drift reference that is selectable between 2.5 V and 4.096 V.
- What package type is the AD7949BCPZ available in?
The AD7949BCPZ is available in a 20-lead LFCSP package.
- Does the AD7949BCPZ support continuous channel scanning?
Yes, the AD7949BCPZ includes a sequencer for continuous channel scanning.
- How does the power dissipation of the AD7949BCPZ behave?
The power dissipation of the AD7949BCPZ scales with throughput.
- Is the AD7949BCPZ RoHS compliant?
Yes, the AD7949BCPZ is RoHS compliant.
