Overview
The AD637JR-REEL, produced by Analog Devices Inc., is a high-accuracy, monolithic RMS-to-DC converter. This component computes the true RMS value of any complex waveform, making it highly suitable for applications requiring precise power monitoring and measurement. The AD637JR operates from a single or dual polarity power supply, handling both AC and DC input signals, and is known for its wide dynamic range and excellent temperature stability.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Manufacturer Part Number | AD637JR-REEL | |
| Package Type | 16-lead SOIC_W | Surface Mount |
| Operating Voltage Range | ±3V to ±18V | Single or dual polarity power supply |
| Supply Current | 2.2 mA (active), 350 µA (standby) | |
| Frequency Response | DC to 1 MHz (flat response), up to 8 MHz for inputs above 1 V rms | |
| Dynamic Range | 60 dB | |
| Temperature Range | 0°C to 70°C (Grade J and K), -40°C to +85°C (Grade A and B), -55°C to +125°C (Grade S) | Depending on the accuracy grade |
| Crest Factor Compensation | Up to 10 with less than 1% additional error |
Key Features
- Accurate RMS-to-DC Conversion: Provides a true RMS measurement of complex waveforms, which is more accurate than average or peak-to-peak measurements.
- Wide Operating Voltage Range: Operates from a single or dual polarity power supply (±3V to ±18V), making it versatile for various applications.
- Low Power Consumption: Low supply current of 2.2 mA in active mode and 350 µA in standby mode, facilitating energy-efficient designs.
- Compact Package: Available in a 16-lead SOIC_W package, which is compact and suitable for space-constrained designs.[
- Excellent Temperature Stability: Ensures reliable performance across a wide temperature range, depending on the accuracy grade.
- Internal Trimming and Buffer Amplifier: Laser wafer trimmed for high accuracy without external trimming, and includes an on-chip buffer amplifier for input buffering or active filtering.
Applications
- Power Monitoring and Measurement: Ideal for precise power monitoring in various systems.
- Audio and Video Equipment: Used in audio and video equipment for accurate signal measurement.[
- Industrial Instrumentation and Control Systems: Suitable for industrial applications requiring accurate RMS measurements.[
- Medical Equipment: Used in medical devices for precise signal measurement.[
- Test and Measurement Devices: Employed in test and measurement equipment for accurate RMS-to-DC conversion.[
- Smart Home Appliances and Internet of Things (IoT): Also applicable in smart home appliances and IoT devices.
Q & A
- What is the primary function of the AD637JR-REEL?
The AD637JR-REEL is a high-accuracy RMS-to-DC converter that computes the true RMS value of any complex waveform.
- What is the operating voltage range of the AD637JR-REEL?
The AD637JR-REEL operates from a single or dual polarity power supply in the range of ±3V to ±18V.
- What is the supply current of the AD637JR-REEL?
The supply current is 2.2 mA in active mode and 350 µA in standby mode.
- What is the frequency response of the AD637JR-REEL?
The AD637JR-REEL has a flat frequency response from DC to 1 MHz and can measure signals up to 8 MHz for inputs above 1 V rms.
- What is the dynamic range of the AD637JR-REEL?
The dynamic range is 60 dB.
- What are the temperature ranges for different accuracy grades of the AD637JR-REEL?
The temperature ranges are 0°C to 70°C (Grade J and K), -40°C to +85°C (Grade A and B), and -55°C to +125°C (Grade S).
- Can the AD637JR-REEL handle high crest factor signals?
Yes, it can handle signals with crest factors of up to 10 with less than 1% additional error.
- What is the purpose of the on-chip buffer amplifier in the AD637JR-REEL?
The on-chip buffer amplifier can be used either as an input buffer or in an active filter configuration to reduce ac ripple and increase accuracy.
- Is the AD637JR-REEL protected against input signal overloads?
Yes, the input circuitry is protected from overload voltages in excess of the supply levels.
- Can multiple AD637JR-REEL units be connected to form a multiplexer?
Yes, when powered down, the output goes to a high impedance state, allowing multiple units to be tied together to form a wideband true RMS multiplexer.
