Overview
The AD641AP-REEL7 is a 250 MHz demodulating logarithmic amplifier produced by Analog Devices Inc. This component is designed to provide a logarithmic response to input signals with a wide dynamic range and high bandwidth. It employs high precision analog circuit techniques to ensure stability of scaling over wide variations in supply voltage and temperature. The AD641 is a complete logarithmic solution, eliminating the need for multiple small-scale ICs and external components, which often result in unstable performance.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency Range | Up to 250 MHz |
| Dynamic Range | 44 dB (single device), 58 dB (two cascaded devices) |
| Accuracy | ±2.0 dB |
| Supply Voltage | ±4.5 V to ±7.5 V |
| Operating Temperature | Industrial and military temperature ranges |
| Package Type | 20-Lead PLCC (P) |
| Current Consumption | Approximately 35 mA |
| Output Current | Up to 2.3 mA per channel |
| Input Bias Current | 7 µA |
Key Features
- Successive detection architecture providing logarithmic output current proportional to input voltage.
- Fully differential direct coupling, eliminating the need for interstage coupling capacitors.
- High precision analog circuit techniques ensuring stable scaling over wide variations in supply voltage and temperature.
- Laser trimming for calibrated logarithmic conversion.
- Onboard 10 dB attenuator and dual polarity current outputs.
Applications
- IF/RF Signal Processing
- Received Signal Strength Indicator (RSSI)
- High Speed Signal Compression
- High Speed Spectrum Analyzer
- ECM/Radar
Q & A
- What is the frequency range of the AD641AP-REEL7?
The AD641AP-REEL7 operates up to 250 MHz. - What is the dynamic range of the AD641AP-REEL7?
The dynamic range is 44 dB for a single device and up to 58 dB when two devices are cascaded. - What is the accuracy of the AD641AP-REEL7?
The accuracy is ±2.0 dB. - What are the supply voltage requirements for the AD641AP-REEL7?
The supply voltage ranges from ±4.5 V to ±7.5 V. - What are the operating temperature ranges for the AD641AP-REEL7?
The device operates over industrial and military temperature ranges. - What type of package does the AD641AP-REEL7 come in?
The device is packaged in a 20-Lead PLCC (P). - How much current does the AD641AP-REEL7 consume?
The current consumption is approximately 35 mA. - What is the output current of the AD641AP-REEL7?
The output current is up to 2.3 mA per channel. - What is the input bias current of the AD641AP-REEL7?
The input bias current is 7 µA. - What are some common applications of the AD641AP-REEL7?
Common applications include IF/RF signal processing, RSSI, high speed signal compression, high speed spectrum analyzer, and ECM/Radar.
