Overview
The AD736BRZ, produced by Analog Devices Inc., is a low power, precision, monolithic true rms-to-dc converter. It is laser trimmed to provide high accuracy, with a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs. This converter is designed to compute the true rms, average rectified, or absolute value of various input signals, making it versatile for a wide range of applications.
The AD736BRZ is optimized for use in battery-powered devices due to its low power consumption of 200 μA and a wide power supply range of +2.8 V, −3.2 V to ±16.5 V. It features a high input impedance of 10^12 Ω and a low input bias current, ensuring minimal loading on the input signal.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Range | - | - | 200 mV rms | mV rms |
| Input Impedance | - | - | 10^12 Ω | Ω |
| Input Bias Current | - | - | 25 pA | pA |
| Accuracy | - | - | ±0.3 mV ± 0.3% of reading | mV, % |
| Power Supply Range | +2.8 V, −3.2 V | - | ±16.5 V | V |
| Quiescent Current | 160 | 200 | 200 | μA |
| Operating Temperature Range | -40°C | - | +85°C | °C |
| Package Type | - | - | 8-Lead SOIC | - |
| Bandwidth (1% reading error) | - | - | 10 kHz (20 mV rms to 200 mV rms) | kHz |
Key Features
- Computes the true rms, average rectified, or absolute value of input signals.
- High accuracy with a maximum error of ±0.3 mV ± 0.3% of reading.
- Low power consumption of 200 μA, suitable for battery-powered applications.
- High input impedance of 10^12 Ω, eliminating the need for an external buffer.
- Low impedance input available for measuring up to 300 mV rms input levels.
- Wide power supply range: +2.8 V, −3.2 V to ±16.5 V.
- Buffered voltage output with no external trims needed for specified accuracy.
- Operates with crest factors up to 5 with minimal additional error.
Applications
- Digital Multimeters
- Process Control
- True RMS Digital Multimeters and Panel Meters
- Panel Meters
- Battery-Powered Instruments
- True RMS AC + DC Measurements
Q & A
- What is the primary function of the AD736BRZ?
The AD736BRZ is a true rms-to-dc converter that computes the true rms, average rectified, or absolute value of input signals.
- What is the accuracy of the AD736BRZ?
The AD736BRZ has a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs.
- What is the power consumption of the AD736BRZ?
The AD736BRZ consumes a maximum of 200 μA of power supply current.
- What is the input impedance of the AD736BRZ?
The AD736BRZ has a high input impedance of 10^12 Ω.
- What are the available package types for the AD736BRZ?
The AD736BRZ is available in an 8-Lead SOIC package.
- What is the operating temperature range of the AD736BRZ?
The AD736BRZ operates over a temperature range of -40°C to +85°C.
- Can the AD736BRZ measure high crest factor signals?
Yes, the AD736BRZ can measure signals with crest factors up to 5, introducing only 2.5% additional error at the 200 mV full-scale input level.
- What is the bandwidth of the AD736BRZ?
The AD736BRZ has a 1% reading error bandwidth that exceeds 10 kHz for input amplitudes from 20 mV rms to 200 mV rms.
- Is the AD736BRZ suitable for battery-powered applications?
Yes, the AD736BRZ is optimized for battery-powered applications due to its low power consumption.
- Does the AD736BRZ require external trims for specified accuracy?
No, the AD736BRZ does not require external trims for specified accuracy.
