Overview
The AD603AR-REEL7, produced by Analog Devices Inc., is a low noise, voltage-controlled variable gain amplifier designed for use in RF and IF AGC (Automatic Gain Control) systems. This amplifier is part of the AD603 series and is packaged in an 8-Lead SOIC (Small Outline Integrated Circuit) format, available on a 7-inch tape and reel. It is renowned for its high accuracy, low noise, and wide bandwidth, making it suitable for a variety of applications requiring precise gain control.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Resistance | 97 | 100 | 103 | Ω |
| Input Capacitance | 2 | pF | ||
| Input Noise Spectral Density | 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 | ||
| Power Consumption (VS = ±5 V) | 125 | mW | ||
| Operating Temperature Range | -40 | +85 | °C |
Key Features
- Accurate, pin-selectable gains of −11 dB to +31 dB with a bandwidth of 90 MHz or +9 dB to +51 dB with a bandwidth of 9 MHz.
- Low input noise spectral density of 1.3 nV/√Hz.
- High impedance (50 MΩ), low bias (200 nA) differential input for gain control.
- Gain control response time less than 1 μs for a 40 dB change.
- Differential gain control interface allowing use of either differential or single-ended positive or negative control voltages.
- Ability to drive a load impedance as low as 100 Ω with low distortion.
- Total harmonic distortion of typically −60 dBc for a ±1 V sinusoidal output at 10 MHz into a 500 Ω load in shunt with 5 pF.
- Peak specified output of ±2.5 V minimum into a 500 Ω load.
- Patented X-AMP® circuit topology comprising a variable attenuator followed by a fixed-gain amplifier.
Applications
- RF/IF AGC amplifiers
- Video gain controls
- A/D range extensions
- Signal measurements
Q & A
- What is the AD603AR-REEL7 used for?
The AD603AR-REEL7 is used in RF and IF AGC systems, video gain controls, A/D range extensions, and signal measurements.
- What is the gain range of the AD603AR-REEL7?
The gain range is −11 dB to +31 dB with a bandwidth of 90 MHz or +9 dB to +51 dB with a bandwidth of 9 MHz.
- What is the input noise spectral density of the AD603AR-REEL7?
The input noise spectral density is 1.3 nV/√Hz.
- How is the gain controlled in the AD603AR-REEL7?
The gain is controlled at a high impedance (50 MΩ), low bias (200 nA) differential input, with a scaling of 25 mV/dB.
- What is the power consumption of the AD603AR-REEL7?
The power consumption is 125 mW at the recommended ±5 V supplies.
- What is the operating temperature range of the AD603AR-REEL7?
The operating temperature range is −40°C to +85°C.
- Can the AD603AR-REEL7 drive low impedance loads?
Yes, it can drive a load impedance as low as 100 Ω with low distortion.
- What is the total harmonic distortion of the AD603AR-REEL7?
The total harmonic distortion is typically −60 dBc for a ±1 V sinusoidal output at 10 MHz into a 500 Ω load in shunt with 5 pF.
- What is the peak specified output of the AD603AR-REEL7?
The peak specified output is ±2.5 V minimum into a 500 Ω load.
- What is the X-AMP® circuit topology used in the AD603AR-REEL7?
The X-AMP® circuit topology comprises a variable attenuator of 0 dB to −42.14 dB followed by a fixed-gain amplifier.
