Overview
The AD7703BRZ-REEL is a high-resolution, 20-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component utilizes a Sigma-Delta (Σ-Δ) conversion technique, ensuring high accuracy and linearity in analog-to-digital conversions. The ADC continuously samples the analog input through an analog modulator, and the output is processed by an on-chip digital filter with a six-pole Gaussian response. This results in a 20-bit output register updated at word rates up to 4 kHz. The device is highly versatile, with settings adjustable via an external master clock or an on-chip crystal controlled clock oscillator.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Resolution | 20 bits |
| Conversion Technique | Sigma-Delta (Σ-Δ) |
| Output Word Rate | Up to 4 kHz |
| Supply Voltage | 2.7 V to 5.5 V (Analog), 2.7 V to 5.25 V (Digital) |
| Package | 20-Lead Standard Small Outline Package (SOIC-20) |
| Mounting Style | SMD/SMT |
| Operating Temperature | -40°C to +85°C |
| Power Consumption (Idle) | 10 µW (Power-down mode) |
| Signal to Noise Ratio (SNR) | Not specified for this model, but generally high for Σ-Δ converters |
| Differential Nonlinearity (DNL) | +/- 0.5 LSB |
| Reference Voltage | 2.5 V |
Key Features
- High Resolution and Accuracy: The AD7703BRZ-REEL offers 20-bit resolution with outstanding 0.0003% accuracy and no missing codes, ensuring a true 20-bit dynamic range.
- Self-Calibration: The device features on-chip self-calibration for zero and full scale, which can be initiated at any time to eliminate temperature drift and system offset and gain errors.
- Flexible Interface: The ADC has a flexible serial port with asynchronous and synchronous modes, compatible with UARTs, shift registers, and the serial ports of industry-standard microcontrollers.
- Low Power Consumption: CMOS construction ensures low power dissipation, and a power-down mode reduces idle power consumption to only 10 µW.
- Compact Package: The SOIC-20 package makes it suitable for space-constrained applications.
Applications
- Industrial Control Systems: Ideal for precise measurements in industrial control systems due to its high accuracy and stability.
- Remote Sensing: Suitable for loop-powered remote sensing applications and battery-powered portable instruments due to its low power consumption.
- Medical Devices: Can be used in medical devices requiring high-resolution analog-to-digital conversion.
- Aerospace and Defense: Applicable in aerospace and defense systems where high accuracy and reliability are crucial.
Q & A
- What is the resolution of the AD7703BRZ-REEL ADC?
The AD7703BRZ-REEL has a 20-bit resolution.
- What conversion technique does the AD7703BRZ-REEL use?
The AD7703BRZ-REEL uses a Sigma-Delta (Σ-Δ) conversion technique.
- What is the maximum output word rate of the AD7703BRZ-REEL?
The maximum output word rate is up to 4 kHz.
- What are the supply voltage ranges for the AD7703BRZ-REEL?
The analog supply voltage range is 2.7 V to 5.5 V, and the digital supply voltage range is 2.7 V to 5.25 V.
- What is the package type of the AD7703BRZ-REEL?
The package type is a 20-Lead Standard Small Outline Package (SOIC-20).
- How does the AD7703BRZ-REEL handle self-calibration?
The device features on-chip self-calibration for zero and full scale, which can be initiated at any time to eliminate temperature drift and system offset and gain errors.
- What is the power consumption in power-down mode?
The power consumption in power-down mode is 10 µW.
- Is the AD7703BRZ-REEL RoHS compliant?
Yes, the AD7703BRZ-REEL is RoHS compliant.
- What types of interfaces does the AD7703BRZ-REEL support?
The device supports asynchronous and synchronous serial interfaces, compatible with UARTs, shift registers, and the serial ports of industry-standard microcontrollers.
- What are some typical applications of the AD7703BRZ-REEL?
Typical applications include industrial control systems, remote sensing, medical devices, and aerospace and defense systems.
