Overview
The AD640JP-REEL is a high-performance, monolithic logarithmic amplifier produced by Analog Devices Inc. This device is designed to provide a complete, fully calibrated logarithmic response over a wide frequency range, making it suitable for various high-precision applications. The AD640JP is available in a 20-lead PLCC (Plastic Leaded Chip Carrier) package, which is ideal for space-constrained designs.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Dynamic Range | 50 dB | |||
| Input Voltage Range - Max | ±7.5 V | |||
| Operating Supply Voltage | 4.5 V | 7.5 V | ||
| Power Dissipation | 200 mW | |||
| Input Bias Current | 25 µA | |||
| Input Offset Voltage | 500 µV | |||
| 3 dB Bandwidth | 145 MHz | |||
| Minimum Operating Temperature | 0 °C | |||
| Maximum Operating Temperature | +70 °C | |||
| Package/Case | PLCC-20 |
Key Features
- Complete, fully calibrated monolithic logarithmic amplifier system.
- Five stages, each with 10 dB gain and 350 MHz bandwidth.
- Direct coupled fully differential signal path.
- Logarithmic slope, intercept, and AC response stable over full military temperature range.
- Dual polarity current outputs scaled 1 mA/decade.
- Low power operation (typically 220 mW at ±5 V).
- Low input offset voltage (50 µV typical, 200 µV max) for good accuracy at low levels.
- Integral X10 attenuator for alternative input range.
Applications
- Radar, sonar, ultrasonic, and audio systems.
- Precision instrumentation from DC to 120 MHz.
- Power measurement with absolute calibration.
- Wide range high accuracy signal compression.
- Alternative to discrete and hybrid IF strips.
- Replaces several discrete log amp ICs.
Q & A
- What is the dynamic range of the AD640JP?
The AD640JP has a dynamic range of up to 50 dB. - What is the input voltage range of the AD640JP?
The input voltage range is ±7.5 V. - What is the operating supply voltage range for the AD640JP?
The operating supply voltage range is from 4.5 V to 7.5 V. - What is the typical power dissipation of the AD640JP?
The typical power dissipation is 200 mW. - What is the 3 dB bandwidth of the AD640JP?
The 3 dB bandwidth is 145 MHz. - What are the temperature ranges for the AD640JP?
The AD640JP operates from 0 °C to +70 °C. - What package type is the AD640JP available in?
The AD640JP is available in a 20-lead PLCC (Plastic Leaded Chip Carrier) package. - What are some key applications of the AD640JP?
Key applications include radar, sonar, ultrasonic and audio systems, precision instrumentation, and power measurement. - Does the AD640JP have any special features for signal accuracy?
Yes, it has a low input offset voltage (50 µV typical, 200 µV max) and minimized thermal recovery 'tails' for improved accuracy. - Is the AD640JP suitable for military temperature ranges?
While the AD640JP itself is specified for commercial temperatures, other variants like the AD640T are available for military temperature ranges.
