Overview
The AD8436ACPZ-R7, produced by Analog Devices Inc., is a cutting-edge, translinear precision, low power, true rms-to-dc converter. This device is designed to compute the precise dc equivalent of the rms value of ac waveforms, including complex patterns generated by switch mode power supplies and triacs. It offers high accuracy across a wide range of input levels and temperatures, ensuring an accuracy of ≤±0.5% and ≤10 μV output offset. The AD8436 is notable for its low power consumption, ease of use, and the absence of programming or processor overhead, making it an attractive solution for various applications.
Key Specifications
| Parameter | Rating/Value |
|---|---|
| Supply Voltage | Dual: ±2.4 V to ±18 V; Single: 4.8 V to 36 V |
| Input Voltage Range | VEE - 0.3 V to VCC + 0.3 V |
| Differential Input Current | ±10 mA |
| Output Short-Circuit Duration | Indefinite |
| Power Dissipation | CP-20-8 LFCSP Without Thermal Pad: 1.2 W, With Thermal Pad: 2.1 W, RQ Package: 1.1 W |
| Operating Temperature Range | A and B grades: −40°C to +125°C, J grade: 0°C to 70°C |
| Storage Range | −65°C to +125°C |
| Package Type | 4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP |
| Input Range | 100 μV rms to 3 V rms (8.5 V p-p) full-scale input range |
| Bandwidth | 1 MHz for −3 dB (300 mV), 65 kHz for additional 1% error |
| Accuracy | ±10 μV ± 0.25% of reading (B grade) |
| Crest Factor Error | <0.5% for CF values between 1 and 10 |
Key Features
- Precision true rms-to-dc conversion with high accuracy (≤±0.5% and ≤10 μV output offset)
- Low power consumption: 300 μA typical at ±2.4 V
- High impedance FET input buffer with separate power supply
- Precision dc output buffer with low offset voltage
- Wide dynamic input range: 100 μV rms to 3 V rms (8.5 V p-p) full-scale input range
- Wide bandwidth: 1 MHz for −3 dB (300 mV), 65 kHz for additional 1% error
- No residual switching products and zero converter dc output offset
- Accurate conversion with crest factors up to 10
- Compact packages: 4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP
- ESD protected
Applications
- Portable multi-meters and other battery-powered applications due to low power consumption
- Measurement of ac waveforms in switch mode power supplies and triacs
- Industrial control and monitoring systems requiring precise rms measurements
- Aerospace and defense applications where high accuracy and reliability are critical
- Automotive systems for monitoring and controlling electrical signals
Q & A
- What is the primary function of the AD8436?
The AD8436 is a true rms-to-dc converter that computes the precise dc equivalent of the rms value of ac waveforms.
- What are the available package types for the AD8436?
The AD8436 is available in 4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP packages.
- What is the operating temperature range for the AD8436?
The operating temperature range is −40°C to +125°C for A and B grades and 0°C to 70°C for J grade.
- What is the typical power consumption of the AD8436?
The typical power consumption is 300 μA at ±2.4 V supply voltage.
- Does the AD8436 require external programming or processor overhead?
No, the AD8436 does not require any programming or processor overhead.
- What is the input range of the AD8436?
The input range is 100 μV rms to 3 V rms (8.5 V p-p) full-scale input range.
- How accurate is the AD8436 in terms of crest factor error?
The crest factor error is less than 0.5% for crest factors between 1 and 10.
- What types of applications benefit from the AD8436's features?
Applications include portable multi-meters, industrial control systems, aerospace, defense, and automotive systems.
- Is the AD8436 ESD protected?
- What is the bandwidth of the AD8436?
The bandwidth is 1 MHz for −3 dB (300 mV) and 65 kHz for additional 1% error.
