Overview
The AD7713AQ is a low-power, 24-bit sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for low-frequency measurement applications and is particularly suited for use in smart, microcontroller-based systems. It features a complete analog front end, including signal conditioning and conversion, making it ideal for loop-powered systems and applications requiring high accuracy and low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Accuracy | ±0.0015% |
| Supply Voltage | 5 V (AVDD and DVDD) |
| Supply Current | < 1 mA |
| Power Consumption | 3.5 mW (typical), 150 µW (power-down mode) |
| Operating Temperature | –40°C to +85°C (AD7713AQ) |
| Package Types | 24-lead PDIP, CERDIP, and SOIC |
| Input Types | Two differential analog inputs, one single-ended high level analog input, and a differential reference input |
| RTD Excitation | On-chip current sources for 3-wire and 4-wire RTD configurations |
Key Features
- Bidirectional microcontroller serial interface for easy communication and control.
- Single-supply operation with low power consumption (3.5 mW typical) and a power-down mode (150 µW typical).
- Programmable gain channels to accept input signals directly from transducers, reducing the need for additional signal conditioning.
- On-chip self-calibration, system calibration, and background calibration to eliminate zero-scale and full-scale errors and temperature drift effects.
- No missing codes, ensuring a true 24-bit dynamic range.
- On-chip digital filter with programmable filter cutoff and settling time.
- CMOS construction for low power dissipation.
Applications
- Loop powered (smart) transmitters.
- RTD transducers.
- Process control systems.
- Portable industrial instruments.
- Microcontroller or DSP processor-based systems.
Q & A
- What is the resolution of the AD7713AQ?
The AD7713AQ has a resolution of 24 bits.
- What is the typical power consumption of the AD7713AQ?
The typical power consumption is 3.5 mW, with a power-down mode of 150 µW.
- What types of input signals can the AD7713AQ accept?
The AD7713AQ can accept low-level signals directly from transducers and high-level signals (up to 4 × VREF).
- Does the AD7713AQ support RTD configurations?
Yes, it provides on-chip current sources for 3-wire and 4-wire RTD configurations.
- What is the operating temperature range for the AD7713AQ?
The operating temperature range is –40°C to +85°C.
- What types of packages are available for the AD7713AQ?
The AD7713AQ is available in 24-lead PDIP, CERDIP, and SOIC packages.
- How does the AD7713AQ handle calibration?
The AD7713AQ features on-chip self-calibration, system calibration, and background calibration to eliminate errors and temperature drift effects.
- Can the filter cutoff of the AD7713AQ be programmed?
Yes, the filter cutoff and settling time can be programmed via the on-chip control register.
- What is the supply voltage requirement for the AD7713AQ?
The supply voltage is 5 V (AVDD and DVDD).
- Is the AD7713AQ suitable for microcontroller or DSP processor applications?
Yes, it is ideal for such applications with its bidirectional serial interface and programmable control register.
