Overview
The AD7291TCPZ-EP is a highly integrated, 8-channel, 12-bit successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for low power consumption and features an internal temperature sensor, making it suitable for a variety of applications. It operates from a single 3.3 V power supply and includes an I2C-compatible interface, supporting both standard and fast I2C modes. The AD7291-EP is particularly useful in environments requiring precise analog-to-digital conversion and temperature monitoring.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Channels | 8 single-ended analog inputs |
| Resolution | 12-bit |
| Input Voltage Range | 0 V to 2.5 V |
| Supply Voltage | 2.8 V to 3.6 V |
| Interface | I2C-compatible (standard and fast modes) |
| Temperature Sensor Resolution | 0.25°C |
| Input Bandwidth | 30 MHz |
| Package | 20-Lead LFCSP (4mm x 4mm w/ EP) |
| Operating Temperature | -40°C to +125°C (extended temperature range for AQEC standard) |
Key Features
- Programmable Sequencer: Allows the selection of a preprogrammable sequence of channels for conversion.
- On-chip Limit Registers: Can be programmed with high and low limits for conversion results, with an out-of-range indicator output (ALERT).
- Internal Temperature Sensor: Monitored and digitized by the 12-bit ADC, providing a resolution of 0.25°C.
- Track-and-Hold Amplifier: Handles frequencies up to 30 MHz.
- External Reference Option: The on-chip 2.5 V reference can be disabled to allow the use of an external reference.
- Low Power Consumption: Normally remains in a partial power-down state while not converting.
Applications
The AD7291TCPZ-EP is versatile and can be used in various applications, including:
- Defense and Aerospace: Meets AQEC standards, making it suitable for military electronics, radar, and jamming/anti-jamming measures.
- Industrial Automation: For precise analog-to-digital conversion and temperature monitoring in industrial environments.
- Medical Devices: Where accurate and reliable data acquisition is critical.
- Data Acquisition Systems: For sampling wide bandwidth analog signals.
Q & A
- What is the resolution of the AD7291TCPZ-EP ADC?
The AD7291TCPZ-EP has a 12-bit resolution. - What is the input voltage range for the analog inputs?
The input voltage range is from 0 V to 2.5 V. - What type of interface does the AD7291TCPZ-EP use?
The device uses an I2C-compatible interface, supporting both standard and fast I2C modes. - Does the AD7291TCPZ-EP have an internal temperature sensor?
Yes, it includes a high accuracy band gap temperature sensor with a resolution of 0.25°C. - What is the operating supply voltage range for the AD7291TCPZ-EP?
The supply voltage range is from 2.8 V to 3.6 V. - What is the package type of the AD7291TCPZ-EP?
The device is packaged in a 20-Lead LFCSP (4mm x 4mm w/ EP). - Can the AD7291TCPZ-EP be used in high-temperature environments?
Yes, it operates over an extended temperature range of -40°C to +125°C. - Does the AD7291TCPZ-EP support external reference voltage?
Yes, the on-chip 2.5 V reference can be disabled to allow the use of an external reference. - What is the purpose of the ALERT output in the AD7291TCPZ-EP?
The ALERT output becomes active when the programmed high or low limits for conversion results are violated. - Is the AD7291TCPZ-EP suitable for defense and aerospace applications?
Yes, it meets AQEC standards and is suitable for such applications.
