Overview
The AD737JRZ-5, produced by Analog Devices Inc., is a low-cost, low-power, true RMS-to-DC converter. This monolithic device is designed to compute the root mean square (RMS) value of input signals, as well as average rectified and absolute values, regardless of the waveform. It is highly accurate and suitable for a wide range of applications, including those requiring high precision and low power consumption.
Key Specifications
| Parameter | Min | Typ | Max |
|---|---|---|---|
| Supply Voltage | ±2.5 V | - | ±16.5 V |
| Supply Current | - | 170 µA | - |
| Standby Power Consumption | - | 125 µW | - |
| Input Resistance (High-Z) | 10^12 Ω | - | 10^12 Ω |
| Input Resistance (Low-Z) | 6.4 kΩ | 8 kΩ | 9.6 kΩ |
| Input Signal Range (Low-Z) | 300 mV rms | - | 1 V rms (for ±5 V to ±16.5 V supply) |
| Temperature Range (Commercial) | 0°C | - | 70°C |
| Temperature Range (Industrial) | -40°C | - | 85°C |
| Package Type | - | 8-Lead SOIC | - |
Key Features
- Computes true RMS, average rectified, and absolute values of input signals regardless of waveform.
- High input impedance (10^12 Ω) and low output impedance.
- Ultra-low power consumption (170 µA supply current) and low standby power (125 µW).
- Wide supply voltage range from ±2.5 V to ±16.5 V.
- High accuracy with a maximum error of ±0.2 mV ± 0.3% of reading for sine wave inputs.
- Surface Mount 8-SOIC package for compact design.
- Only one external component (an averaging capacitor) required for true RMS measurement.
- No output buffer amplifier, reducing dc offset errors.
Applications
- Telecommunications
- Audio Equipment
- Test and Measurement Systems
- Industrial Controls
- Energy Management Systems
- Battery-powered devices and portable multimeters
Q & A
- What is the primary function of the AD737JRZ-5?
The AD737JRZ-5 computes the true RMS, average rectified, and absolute values of input signals regardless of the waveform.
- What are the supply voltage ranges for the AD737JRZ-5?
The supply voltage range is from ±2.5 V to ±16.5 V.
- What is the typical supply current of the AD737JRZ-5?
The typical supply current is 170 µA.
- What is the standby power consumption of the AD737JRZ-5?
The standby power consumption is typically 125 µW.
- What types of input options does the AD737JRZ-5 offer?
The AD737JRZ-5 offers both high impedance (10^12 Ω) and low impedance (8 kΩ) input options.
- What is the maximum error for sine wave inputs?
The maximum error is ±0.2 mV ± 0.3% of reading for sine wave inputs.
- What package types are available for the AD737JRZ-5?
The AD737JRZ-5 is available in an 8-Lead SOIC package.
- Is the AD737JRZ-5 suitable for battery-powered applications?
Yes, it is highly suitable due to its ultra-low power consumption and low standby power.
- What external components are required for true RMS measurement?
Only one external component, an averaging capacitor, is required for true RMS measurement.
- What are some common applications of the AD737JRZ-5?
Common applications include telecommunications, audio equipment, test and measurement systems, industrial controls, and energy management systems.
