Overview
The AD736ARZ-RL, produced by Analog Devices Inc., is a low power, precision, monolithic true rms-to-dc converter. This component is designed to convert an ac voltage waveform into a dc voltage, providing true rms, average rectified, or absolute value measurements. It is laser trimmed to ensure high accuracy, with a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs. The AD736 is particularly suited for battery-powered applications due to its low power consumption of 1 mW and maximum supply current of 200 μA.
Key Specifications
| Parameter | Value |
|---|---|
| Input Range | 200 mV rms full-scale (larger inputs with input attenuator) |
| Input Impedance | 10 MΩ to 12 MΩ (high impedance FET input), 8 kΩ (low impedance input) |
| Input Bias Current | 25 pA maximum |
| Accuracy | ±0.3 mV ± 0.3% of reading |
| Crest Factor | Up to 5 (with 2.5% additional error at full scale) |
| Power Supply Range | +2.8 V, −3.2 V to ±16.5 V |
| Supply Current | 200 μA maximum |
| Output Type | Buffered voltage output |
| Operating Temperature Range | −40°C to +85°C (industrial), 0°C to +70°C (commercial) |
| Package Types | 8-lead SOIC, PDIP, CERDIP |
Key Features
- Converts ac voltage waveforms to dc voltage, providing true rms, average rectified, or absolute value measurements.
- High input impedance (10 MΩ to 12 MΩ) and low input bias current (25 pA maximum).
- High accuracy: ±0.3 mV ± 0.3% of reading.
- RMS conversion with signal crest factors up to 5.
- Wide power supply range: +2.8 V, −3.2 V to ±16.5 V.
- Low power consumption: 1 mW, 200 μA maximum supply current.
- Buffered voltage output.
- No external trims needed for specified accuracy.
- Operable as an ac-coupled device with an external capacitor.
- High input impedance eliminates the need for an external buffer when interfacing with input attenuators.
Applications
The AD736 is suitable for various applications, including:
- Portable multimeters and other battery-powered measurement devices due to its low power consumption.
- Upgrading the performance of non-rms precision rectifiers in many applications.
- Measuring ac and dc input voltages in industrial and commercial environments.
- Applications requiring high accuracy and low power, such as in medical devices and automotive systems.
Q & A
- What is the primary function of the AD736ARZ-RL?
The AD736ARZ-RL is a true rms-to-dc converter that converts an ac voltage waveform to a dc voltage, providing true rms, average rectified, or absolute value measurements.
- What is the input range of the AD736ARZ-RL?
The input range is 200 mV rms full-scale, with larger inputs possible using an input attenuator.
- What is the input impedance of the AD736ARZ-RL?
The input impedance is 10 MΩ to 12 MΩ (high impedance FET input) and 8 kΩ (low impedance input).
- What is the accuracy of the AD736ARZ-RL?
The accuracy is ±0.3 mV ± 0.3% of reading.
- What is the power supply range for the AD736ARZ-RL?
The power supply range is +2.8 V, −3.2 V to ±16.5 V.
- How much power does the AD736ARZ-RL consume?
The AD736ARZ-RL consumes 1 mW of power with a maximum supply current of 200 μA.
- What types of packages are available for the AD736ARZ-RL?
The AD736ARZ-RL is available in 8-lead SOIC, PDIP, and CERDIP packages.
- What are the operating temperature ranges for the AD736ARZ-RL?
The operating temperature ranges are −40°C to +85°C (industrial) and 0°C to +70°C (commercial).
- Can the AD736ARZ-RL be used in ac-coupled mode?
Yes, the AD736ARZ-RL can be operated as an ac-coupled device by adding one external capacitor.
- What is the significance of the high input impedance of the AD736ARZ-RL?
The high input impedance eliminates the need for an external buffer when interfacing with input attenuators.
