Overview
The AD736JNZ, produced by Analog Devices Inc., is a low power, precision, monolithic true rms-to-dc converter. It is designed to convert an ac voltage waveform into a dc voltage, providing accurate measurements of the true rms, average rectified, or absolute value of the input signal. The AD736JNZ is laser trimmed to ensure high accuracy, with a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs. This component is particularly suited for applications requiring high precision and low power consumption, making it ideal for battery-powered devices such as portable multimeters.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Range | - | - | 200 mV rms | - |
| Input Impedance (High Z) | - | - | 10^12 Ω | - |
| Input Impedance (Low Z) | - | - | 8 kΩ | - |
| Input Bias Current | - | - | 25 pA | - |
| Accuracy | - | - | ±0.3 mV ± 0.3% of reading | - |
| Operating Voltage Range | +2.8 V, -3.2 V | - | ±16.5 V | - |
| Quiescent Current | 160 | 200 | 200 | µA |
| Operating Temperature Range (Commercial) | 0°C | - | 70°C | - |
| Operating Temperature Range (Industrial) | -40°C | - | 85°C | - |
Key Features
- High Accuracy: The AD736JNZ provides a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs, ensuring high precision in measurements.
- Low Power Consumption: It consumes only 200 µA of power supply current, making it suitable for battery-powered applications.
- High Input Impedance: The high impedance FET input (10^12 Ω) eliminates the need for an external buffer when interfacing with input attenuators.
- Flexible Input Options: The component offers both high impedance and low impedance inputs, which can be used either single-ended or differentially.
- Wide Operating Voltage Range: It operates over a wide voltage range from +2.8 V, -3.2 V to ±16.5 V.
- Buffered Voltage Output: The AD736JNZ includes a built-in output buffer amplifier, providing design flexibility.
- Simple True RMS Measurement: Only one external component, an averaging capacitor, is required for true rms measurement.
Applications
- Portable Multimeters: The low power consumption and high accuracy make the AD736JNZ ideal for portable multimeters and other battery-powered measurement devices.
- Industrial Automation: It is suitable for applications in industrial automation where precise measurement of ac signals is required.
- Aerospace and Defense: The component's high reliability and accuracy make it a good fit for aerospace and defense applications.
- Medical Devices: The AD736JNZ can be used in medical devices that require precise measurement of physiological signals.
Q & A
- What is the primary function of the AD736JNZ?
The AD736JNZ is a true rms-to-dc converter that converts an ac voltage waveform into a dc voltage, providing accurate measurements of the true rms, average rectified, or absolute value of the input signal.
- What is the maximum error of the AD736JNZ for sine wave inputs?
The maximum error is ±0.3 mV ± 0.3% of reading for sine wave inputs.
- What is the power consumption of the AD736JNZ?
The AD736JNZ consumes a maximum of 200 µA of power supply current.
- What are the input impedance options for the AD736JNZ?
The component offers both a high impedance FET input (10^12 Ω) and a low impedance input (8 kΩ).
- What is the operating voltage range of the AD736JNZ?
The operating voltage range is from +2.8 V, -3.2 V to ±16.5 V.
- Does the AD736JNZ require external trims for specified accuracy?
No, the AD736JNZ does not require external trims for specified accuracy.
- What types of packages are available for the AD736JNZ?
The AD736JNZ is available in 8-lead PDIP, SOIC, and CERDIP packages.
- What are the temperature ranges for the different grades of the AD736JNZ?
The AD736J and AD736K grades are rated over the 0°C to +70°C and -20°C to +85°C commercial temperature ranges. The AD736A and AD736B grades are rated over the -40°C to +85°C industrial temperature range.
- Can the AD736JNZ measure input waveforms with high crest factors?
- What external components are required for true rms measurement with the AD736JNZ?
