Overview
The AD536AJH, produced by Analog Devices Inc., is a complete monolithic integrated circuit designed for true rms-to-dc conversion. This device offers performance comparable or superior to that of hybrid or modular units, making it a cost-effective and high-performance solution. The AD536AJH directly computes the true rms value of any complex input waveform containing ac and dc components, making it particularly useful for measuring signal power accurately.
The device is laser trimmed to minimize input and output offset voltage and to optimize waveform symmetry, ensuring high accuracy without the need for external trims. It operates over a wide temperature range and can be powered from either single or dual supplies, making it versatile for various applications.
Key Specifications
| Parameter | Rating/Value |
|---|---|
| Supply Voltage | Dual Supply: ±18 V, Single Supply: +36 V |
| Internal Power Dissipation | 500 mW |
| Maximum Input Voltage | ±25 V peak |
| Operating Temperature Range | AD536AJ/AD536AK: 0°C to +70°C, AD536AS: −55°C to +125°C |
| Lead Temperature (Soldering, 60 sec) | 300°C |
| ESD Rating | 1000 V |
| Bandwidth | Up to 300 kHz with less than 3 dB errors for signal levels greater than 100 mV |
| Crest Factor Compensation | Measurements with 1% error at crest factors up to 7 |
| Quiescent Supply Current | 1 mA |
| Maximum Total Error | AD536AJ: ±5 mV ± 0.5% of reading, AD536AK: ±2 mV ± 0.2% of reading |
| Package Types | Hermetically sealed 14-lead DIP, 10-pin TO-100 metal header, 20-terminal leadless hermetically sealed ceramic chip carrier |
Key Features
- True RMS-to-DC Conversion: Directly computes the true rms value of complex input waveforms containing ac and dc components.
- Crest Factor Compensation: Allows measurements with 1% error at crest factors up to 7.
- Wide Bandwidth: Measurement capability up to 300 kHz with less than 3 dB errors for signal levels greater than 100 mV.
- Auxiliary dB Output: Provides a logarithmic output of the rms signal with a dynamic range of 60 dB.
- Low Power Consumption: 1 mA quiescent supply current, suitable for remote controllers and battery-powered instruments.
- Flexible Powering: Operates from single or dual supplies with total supply levels from 5 V to 36 V.
- High Accuracy: Laser trimmed to minimize input and output offset voltage and optimize waveform symmetry.
- Input and Output Protection: Input circuitry can handle overload voltages beyond supply levels, and the output is short-circuit protected.
Applications
- Signal Processing and Measurement: Ideal for measuring the true rms value of complex waveforms in various signal processing applications.
- Remote Controllers and Battery-Powered Instruments: Suitable due to its low power consumption and flexible powering options.
- Aerospace and Military: Available in versions rated for the extended temperature range of −55°C to +125°C, making it suitable for harsh environments.
- Industrial Automation: Used in applications requiring accurate measurement of signal power and dB levels.
- Audio and Communication Systems: Useful for measuring signal levels and power in audio and communication systems.
Q & A
- What is the primary function of the AD536AJH?
The AD536AJH is a true rms-to-dc converter, which directly computes the true rms value of any complex input waveform containing ac and dc components.
- What is the bandwidth of the AD536AJH?
The device has a measurement capability up to 300 kHz with less than 3 dB errors for signal levels greater than 100 mV.
- What is the crest factor compensation scheme in the AD536AJH?
The device allows measurements with 1% error at crest factors up to 7.
- Does the AD536AJH have an auxiliary output?
Yes, it provides an auxiliary dB output pin with a useful dynamic range of 60 dB.
- What are the power supply options for the AD536AJH?
The device can operate from either single or dual supplies with total supply levels from 5 V to 36 V.
- What is the quiescent supply current of the AD536AJH?
The quiescent supply current is 1 mA, making it suitable for battery-powered instruments.
- What are the available package types for the AD536AJH?
The device is available in hermetically sealed 14-lead DIP, 10-pin TO-100 metal header, and 20-terminal leadless hermetically sealed ceramic chip carrier packages.
- What is the operating temperature range for the AD536AJH?
The AD536AJH operates from 0°C to +70°C, while the AD536AS version operates from −55°C to +125°C.
- Is the AD536AJH protected against overloads and short circuits?
Yes, the input circuitry can handle overload voltages beyond supply levels, and the output is short-circuit protected.
- What is the maximum total error for the AD536AJH?
The maximum total error for the AD536AJ is ±5 mV ± 0.5% of reading, and for the AD536AK, it is ±2 mV ± 0.2% of reading.
