Overview
The AD7712ARZ-REEL, produced by Analog Devices Inc., is a 24-bit sigma-delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. This device features two analog input channels, making it suitable for a variety of precision measurement tasks. It can accept both low-level signals directly from transducers and high-level signals up to ±10V. The AD7712 employs a proprietary programmable gain front end and an on-chip digital filter, which can be programmed to adjust the filter cutoff and settling time. This ADC is ideal for use in smart, microcontroller-based systems due to its flexible serial interface and low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 24 |
| Number of Analog Input Channels | 2 |
| Architecture | Sigma-Delta |
| Sampling Rate (Per Second) | Up to 19.5 ksps |
| Input Type | Differential, Single Ended |
| Input Range | Low level: 20 mV full-scale (differential), High level: ±10V |
| Voltage - Supply, Analog | 5V ~ 10V |
| Voltage - Supply, Digital | 5V |
| Operating Temperature | -40°C ~ 85°C |
| Package | 24-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
Key Features
- Programmable gain front end with differential and single-ended input capabilities.
- On-chip digital filter with programmable notch frequency.
- Self-calibration, system calibration, and background calibration options.
- Bidirectional serial interface (SPI) for easy configuration and data transfer.
- Low power consumption with a hardware programmable power-down mode (100 µW typical in standby).
- CMOS construction for low power dissipation.
Applications
The AD7712 is well-suited for various precision measurement applications, including:
- Smart, microcontroller-based systems.
- Industrial process control and automation.
- Medical devices requiring precise signal measurement.
- Test and measurement equipment.
- Automotive and aerospace applications where high accuracy and reliability are crucial.
Q & A
- What is the resolution of the AD7712 ADC?
The AD7712 has a resolution of 24 bits, offering high precision for low-frequency measurement applications.
- How many analog input channels does the AD7712 have?
The AD7712 features two analog input channels.
- What is the sampling rate of the AD7712?
The AD7712 can sample up to 19.5 ksps.
- What types of input signals can the AD7712 accept?
The AD7712 can accept both low-level signals (as low as 20 mV full-scale differential) and high-level signals up to ±10V.
- Does the AD7712 support calibration?
Yes, the AD7712 supports self-calibration, system calibration, and background calibration.
- What is the power consumption of the AD7712 in standby mode?
The AD7712 has a standby power consumption of 100 µW typical.
- What is the operating temperature range of the AD7712?
The operating temperature range is -40°C to 85°C.
- What package options are available for the AD7712?
The AD7712 is available in 24-pin DIP and 24-lead SOIC packages.
- Can the AD7712 be used with microcontrollers and digital signal processors?
Yes, the AD7712 has a flexible serial interface that allows it to connect directly to microcontrollers and digital signal processors.
- Is the AD7712 suitable for high-accuracy applications?
Yes, the AD7712 is designed for high-accuracy applications, offering 16-bit accuracy (0.0015% FSR) and no missing codes to 24 bits.
