Overview
The AD603ARZ-REEL7, manufactured by Analog Devices Inc., is a low noise, voltage-controlled amplifier designed for use in RF and IF AGC (Automatic Gain Control) systems. This amplifier is characterized by its high accuracy, low noise, and wide bandwidth, making it suitable for various applications requiring precise gain control. The AD603 features a proprietary X-AMP topology, which includes a variable attenuator followed by a fixed-gain amplifier, ensuring stable and linear gain control over a wide range of frequencies.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Resistance | Pin 3 to Pin 4 | 97 | 100 | 103 | Ω |
| Input Capacitance | 2 | pF | |||
| Input Noise Spectral Density | Input short-circuited | 1.3 | nV/√Hz | ||
| Noise Figure | f = 10 MHz, gain = maximum, RS = 10 Ω | 8.8 | dB | ||
| 1 dB Compression Point | f = 10 MHz, gain = maximum, RS = 10 Ω | -11 | dBm | ||
| Peak Input Voltage | ±1.4 | ±2 | V | ||
| -3 dB Bandwidth | VOUT = 100 mV rms | 90 | MHz | ||
| Slew Rate | RL ≥ 500 Ω | 275 | V/µs | ||
| Peak Output | RL ≥ 500 Ω | ±2.5 | ±3.0 | V | |
| Output Impedance | f ≤ 10 MHz | 2 | Ω | ||
| Operating Temperature Range | -40 | 85 | °C | ||
| Supply Voltage Range | ±4.75 | ±6.3 | V |
Key Features
- Linear-in-dB Gain Control: The AD603 features a linear-in-dB gain control, allowing for accurate and stable gain settings over a wide range of frequencies.
- Low Noise: The amplifier has an input noise spectral density of 1.3 nV/√Hz, making it suitable for low-noise applications.
- Wide Bandwidth: The AD603 offers a -3 dB bandwidth of 90 MHz at VOUT = 100 mV rms, ensuring high-frequency performance.
- High Accuracy: The gain accuracy is ±0.5 dB typical, with a gain control response time of less than 1 second for a 40 dB change.
- Flexible Gain Control: The differential gain control interface supports either differential or single-ended positive or negative control voltages.
- Low Distortion: The amplifier exhibits low harmonic distortion, typically -60 dBc at f = 10 MHz, VOUT = 1 V rms.
- Compact Packaging: The AD603 is available in an 8-lead NSOIC package, suitable for surface mount applications.
Applications
- RF/IF AGC Amplifiers: Ideal for use in radio frequency and intermediate frequency automatic gain control systems.
- Video Gain Controls: Suitable for video signal processing where precise gain control is required.
- A/D Range Extensions: Can be used to extend the dynamic range of analog-to-digital converters.
- Signal Measurements: Applicable in various signal measurement applications due to its high accuracy and low noise characteristics.
Q & A
- What is the typical bandwidth of the AD603 amplifier?
The AD603 has a typical -3 dB bandwidth of 90 MHz at VOUT = 100 mV rms.
- What is the input noise spectral density of the AD603?
The input noise spectral density is 1.3 nV/√Hz.
- What is the operating temperature range of the AD603?
The AD603 operates from -40°C to +85°C.
- What is the supply voltage range for the AD603?
The supply voltage range is ±4.75 V to ±6.3 V.
- How is the gain controlled in the AD603?
The gain is controlled through a differential gain control interface, allowing for either differential or single-ended positive or negative control voltages.
- What is the typical slew rate of the AD603?
The typical slew rate is 275 V/µs for RL ≥ 500 Ω.
- What is the peak output voltage of the AD603?
The peak output voltage is ±2.5 V minimum into a 500 Ω load.
- Can multiple AD603 amplifiers be cascaded?
Yes, several AD603 amplifiers can be cascaded and their gain control gains offset to optimize the system SNR.
- What is the total harmonic distortion of the AD603?
The total harmonic distortion is typically -60 dBc at f = 10 MHz, VOUT = 1 V rms.
- What is the package type of the AD603?
The AD603 is available in an 8-lead NSOIC package).
