Overview
The AD602AR-REEL, produced by Analog Devices Inc., is a dual-channel, low noise, variable gain amplifier. This component is optimized for use in ultrasound imaging systems but is also applicable to various other applications requiring precise gain, low noise, and wide bandwidth. Each independent channel of the AD602 provides a gain range of –10 dB to +30 dB, with a lower gain compared to the AD600, resulting in an improved signal-to-noise ratio (SNR) at the output. The AD602 features a proprietary X-AMP® circuit, which includes a variable attenuator followed by a high-speed fixed gain amplifier, ensuring stable and precise gain control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain Range | –10 dB to +30 dB | dB |
| Input Noise Spectral Density | 1.4 nV/√Hz | nV/√Hz |
| Bandwidth (–3 dB) | 35 MHz | MHz |
| Group Delay Change vs. Gain | ±2 ns | ns |
| Total Harmonic Distortion (THD) | –60 dBc | dBc |
| Output Voltage (Peak) | ±2.5 V (into 500 Ω load), ±1 V (into 100 Ω load) | V |
| Power Supply Range | ±4.75 V to ±5.25 V | V |
| Quiescent Current per Channel | 11 mA to 12.5 mA | mA |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | 16-Lead SOIC |
Key Features
- Linear in dB gain response with a scaling factor of 32 dB per volt.
- Accurate absolute gain: ±0.3 dB.
- Low input noise: 1.4 nV/√Hz.
- Low distortion: –60 dBc THD at ±1 V output.
- High bandwidth: dc to 35 MHz (–3 dB).
- Stable group delay: ±2 ns.
- Low power consumption: 125 mW (maximum) per amplifier.
- Signal gating function for each amplifier.
- TTL- and CMOS-compatible logic inputs.
- MIL-STD-883-compliant and DESC versions available.
Applications
- Ultrasound and sonar time-gain controls.
- High-performance audio and RF AGC systems.
- Signal measurement systems.
- Any application requiring precise gain, low noise, and wide bandwidth.
Q & A
- What is the gain range of the AD602?
The AD602 has a gain range of –10 dB to +30 dB.
- What is the input noise spectral density of the AD602?
The input noise spectral density is 1.4 nV/√Hz.
- What is the bandwidth of the AD602?
The bandwidth is dc to 35 MHz (–3 dB).
- What is the total harmonic distortion (THD) of the AD602?
The THD is –60 dBc for a ±1 V sinusoidal output at 10 MHz.
- What is the power supply range for the AD602?
The power supply range is ±4.75 V to ±5.25 V.
- What is the quiescent current per channel for the AD602?
The quiescent current per channel is 11 mA to 12.5 mA.
- What are the typical operating temperature ranges for the AD602?
The operating temperature range is –40°C to +85°C.
- What package types are available for the AD602?
The AD602 is available in 16-Lead SOIC packages among others.
- Is the AD602 MIL-STD-883 compliant?
- What is the signal gating function in the AD602?
The signal gating function allows each amplifier channel to be independently gated, blocking signal transmission and setting the dc output level to within a few millivolts of the output ground.
