Overview
The AD636JHZ, produced by Analog Devices Inc., is a low power monolithic integrated circuit designed for true root-mean-square (RMS) to DC conversion of low-level signals. This device is capable of computing the true RMS value of complex AC or AC plus DC input signals and providing an equivalent DC output level. It offers high accuracy and wide response capability, making it suitable for various applications requiring precise signal measurement.
Key Specifications
| Parameter | Min | Typ | Max |
|---|---|---|---|
| Input Signal Range | 0 mV | - | 200 mV rms |
| Error (AD636K) | - | - | 0.5% |
| Error (AD636J) | - | - | 1.0% |
| Bandwidth (−3 dB) | - | - | 1.5 MHz (at 200 mV rms) |
| Quiescent Current | - | 800 μA | - |
| Supply Voltage Range | ±2.5 V to ±16.5 V or +5 V to +24 V | - | - |
| Output Impedance | 8 kΩ | 10 kΩ | 12 kΩ |
| Crest Factor | - | - | Up to 6 |
Key Features
- True RMS-to-DC conversion for low-level signals
- Wide response capability with a bandwidth of up to 1.5 MHz
- Low power consumption with a quiescent current of 800 μA
- Single or dual supply operation from ±2.5 V to ±16.5 V or +5 V to +24 V
- Input and output terminals fully protected against overvoltage and short circuits
- Auxiliary dB output with a 50 dB range
- No external trims required for full-rated accuracy due to factory trimming
- Optional on-chip amplifier for input or output buffering
Applications
- Battery-powered portable instruments due to low power consumption
- Audio and video signal processing where accurate RMS measurement is necessary
- Industrial control systems requiring precise signal measurement
- Medical devices needing accurate signal conversion
- Test and measurement equipment
Q & A
- What is the primary function of the AD636JHZ? The AD636JHZ performs true RMS-to-DC conversion on low-level signals.
- What is the input signal range of the AD636JHZ? The input signal range is from 0 mV to 200 mV rms.
- What are the error specifications for the AD636JHZ? The AD636K version has a maximum error of 0.5%, while the AD636J version has a maximum error of 1.0%.
- What is the bandwidth of the AD636JHZ? The bandwidth is up to 1.5 MHz at 200 mV rms.
- What is the quiescent current of the AD636JHZ? The quiescent current is typically 800 μA.
- What are the supply voltage options for the AD636JHZ? It can operate from ±2.5 V to ±16.5 V or from +5 V to +24 V.
- Is the AD636JHZ protected against overvoltage and short circuits? Yes, the input and output terminals are fully protected.
- Does the AD636JHZ require external trims for accuracy? No, it is factory-trimmed at the wafer level for full-rated accuracy.
- What is the purpose of the auxiliary dB output? The auxiliary dB output provides a logarithmic representation of the RMS output, with a 50 dB range.
- What are some common applications of the AD636JHZ? It is used in battery-powered portable instruments, audio and video signal processing, industrial control systems, medical devices, and test and measurement equipment.
