Overview
The AD536ASH/883B, 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 robust and efficient solution for various applications. The AD536ASH/883B directly computes the true rms value of any complex input waveform containing ac and dc components, with a crest factor compensation scheme that allows measurements with 1% error at crest factors up to 7. It operates within a wide bandwidth, extending measurement capabilities to 300 kHz with less than 3 dB errors for signal levels greater than 100 mV.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Dual Supply) | ±3.0 to ±18 | V |
| Supply Voltage (Single Supply) | 5 to 36 | V |
| Quiescent Current | 1.2 | mA |
| Temperature Range (Rated Performance) | −55 to +125 | °C |
| Bandwidth | Up to 300 kHz | |
| Accuracy Grades | J, K, S | |
| Maximum Error (AD536AK) | ±2 mV ± 0.2% of reading | |
| Maximum Error (AD536AJ and AD536AS) | ±5 mV ± 0.5% of reading | |
| Output Resistance | 0.5 | Ω |
| Short-Circuit Current | 20 | mA |
| Small-Signal Bandwidth | 1 | MHz |
| Slew Rate | 5 | V/μs |
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.
- Auxiliary dB Output: Provides a logarithmic output for dB conversion with a dynamic range of 60 dB.
- Low Power Consumption: Operates with a quiescent current of 1.2 mA, suitable for battery-powered instruments.
- Wide Supply Voltage Range: Can operate from split supplies or a single supply with total supply levels from 5 V to 36 V.
- High Accuracy: Laser trimmed to minimize input and output offset voltage, ensuring full-scale accuracy at 7 V rms without external trims.
- Temperature Stability: Available in versions rated for −55°C to +125°C extended temperature range.
- Protection Features: Input and output pins are fully protected, with the input circuitry capable of handling overload voltages and the output being short-circuit protected.
Applications
- Remote Controllers: Suitable for remote controllers due to its low power consumption and wide supply voltage range.
- Battery-Powered Instruments: Ideal for battery-powered instruments requiring accurate rms measurements.
- Aerospace and Military: Available in versions compliant with military and aerospace standards (e.g., AD536ASH/883B)..
- Industrial Measurement: Used in various industrial applications requiring precise measurement of complex waveforms.
Q & A
- What is the primary function of the AD536ASH/883B?
The AD536ASH/883B is a monolithic integrated circuit that performs true rms-to-dc conversion of complex input waveforms containing ac and dc components.
- What is the crest factor compensation scheme in the AD536ASH/883B?
The crest factor compensation scheme allows measurements with 1% error at crest factors up to 7.
- What is the dynamic range of the auxiliary dB output?
The auxiliary dB output has a useful dynamic range of 60 dB.
- What is the quiescent current of the AD536ASH/883B?
The quiescent current is 1.2 mA.
- What is the operating temperature range of the AD536ASH/883B?
The device operates within a temperature range of −55°C to +125°C.
- Is the AD536ASH/883B suitable for battery-powered instruments?
Yes, it is suitable due to its low power consumption and wide supply voltage range.
- What are the available accuracy grades for the AD536A series?
The available accuracy grades are J, K, and S.
- What is the maximum error for the AD536AK version?
The maximum error for the AD536AK version is ±2 mV ± 0.2% of reading.
- Does the AD536ASH/883B require external trims for accuracy?
No, the device is laser trimmed to ensure full-scale accuracy without external trims.
- What kind of protection features does the AD536ASH/883B have?
The device has input and output protection, including overload voltage handling and short-circuit protection.
