Overview
The AD7710AQ, produced by Analog Devices Inc., is a comprehensive analog front end designed for low-frequency measurement applications. This device is capable of accepting low-level signals directly from strain gages or transducers and converting them into a serial digital word. It employs a sigma-delta conversion technique, achieving up to 24 bits of no missing codes performance. The AD7710AQ features a programmable gain front end and an on-chip digital filter, allowing for adjustable filter cutoff and settling times. It is ideal for use in smart, microcontroller-based systems, offering software-configurable input channel selection, gain settings, and signal polarity through a bidirectional serial port.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 24 |
| Number of Analog Inputs | 2 (differential) |
| Reference Input | Differential |
| Conversion Technique | Sigma-Delta |
| Sampling Rate | Up to 4.17 kSPS |
| Supply Voltage | 5 V to 10 V |
| Operating Temperature | -40°C to +85°C (AD7710AQ) |
| Package Type | 24-lead CerDIP (Narrow 0.3 Inch) |
| Interface | SPI, Serial |
| Power Consumption (Standby) | Typically 7 mW |
Key Features
- Programmable Gain Front End: Allows the device to accept input signals directly from strain gages or transducers, reducing the need for additional signal conditioning.
- On-Chip Digital Filter: The first notch of the digital filter can be programmed, enabling adjustment of the filter cutoff and settling time.
- Software Configurability: Input channel selection, gain settings, and signal polarity can be configured using the bidirectional serial port.
- Calibration Options: Includes self-calibration, system calibration, and background calibration, with the ability to read and write on-chip calibration registers.
- Low Power Dissipation: CMOS construction ensures low power consumption, with a software-programmable power-down mode reducing standby power to 7 mW typical.
- No Missing Codes Performance: Ensures true, usable 23-bit dynamic range with excellent ±0.0015% accuracy.
Applications
- Low-Frequency Measurement Systems: Ideal for applications involving strain gages, transducers, and other low-frequency sensors.
- Smart, Microcontroller-Based Systems: Suitable for integration into systems controlled by microcontrollers or DSP processors.
- Industrial Automation: Used in various industrial automation applications requiring precise analog-to-digital conversion.
- Medical Devices: Applicable in medical devices that require high accuracy and low noise in signal conversion.
Q & A
- What is the primary function of the AD7710AQ?
The AD7710AQ is a complete analog front end that converts low-level signals from strain gages or transducers into a serial digital word.
- What conversion technique does the AD7710AQ use?
The AD7710AQ employs a sigma-delta conversion technique.
- How many analog inputs does the AD7710AQ have?
The AD7710AQ has two differential analog inputs.
- What is the typical standby power consumption of the AD7710AQ?
The typical standby power consumption is 7 mW.
- Can the AD7710AQ operate from a single supply?
Yes, it can operate from a single supply by tying the VSS pin to AGND, provided that the input signals are more positive than -30 mV.
- What types of calibration does the AD7710AQ support?
The AD7710AQ supports self-calibration, system calibration, and background calibration.
- What is the resolution of the AD7710AQ?
The AD7710AQ has a resolution of up to 24 bits.
- What is the operating temperature range of the AD7710AQ?
The operating temperature range is -40°C to +85°C.
- What package types are available for the AD7710AQ?
The AD7710AQ is available in a 24-lead CerDIP (Narrow 0.3 Inch) package.
- How can the input channel selection and gain settings be configured?
Input channel selection, gain settings, and signal polarity can be configured in software using the bidirectional serial port.
