Overview
The AD602ARZ, produced by Analog Devices Inc., is a dual-channel, low noise, wideband variable gain amplifier. This component is part of the X-AMP® series, designed to provide precise gain, low noise, and distortion, along with a wide bandwidth. The AD602 is optimized for use in various applications, including ultrasound imaging systems, high-performance audio, and RF AGC systems. Each independent channel offers a gain range of –10 dB to +30 dB, with the lower gain of the AD602 resulting in an improved signal-to-noise ratio (SNR) at the output.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Range | -10 | - | +30 | dB |
| Input Noise Spectral Density | 1.4 | 1.4 | 1.4 | nV/√Hz |
| -3 dB Bandwidth | 35 | 35 | 35 | MHz |
| Slew Rate | 275 | 275 | 275 | V/μs |
| Peak Output (RL ≥ 500 Ω) | ±2.5 | ±3 | ±2.5 | V |
| Output Impedance (f ≤ 10 MHz) | 2 | 2 | 2 | Ω |
| Group Delay Change vs. Gain | ±2 | ±2 | ±2 | ns |
| Total Harmonic Distortion (RL= 200 Ω, VOUT = ±1 V peak) | -60 | -60 | -60 | dBc |
| Supply Voltage | ±4.75 | - | ±5.25 | V |
| Quiescent Current per Channel | 11 | - | 14 | mA |
| Operating Temperature | -40 | - | +85 | °C |
Key Features
- Accurate Gain Control: The gain is directly proportional to the control voltage, accurately calibrated, and supply and temperature-stable.
- Low Noise and Distortion: Input noise spectral density of 1.4 nV/√Hz and total harmonic distortion of -60 dBc at ±1 V output.
- Wide Bandwidth: -3 dB bandwidth of 35 MHz, essentially independent of the gain.
- Signal Gating Function: Each channel has an independent gating facility that optionally blocks signal transmission and sets the dc output level to within a few millivolts of the output ground.
- TTL- and CMOS-Compatible Logic Inputs: For the signal gating function.
- High Speed and Low Power Consumption: Slew rate of 275 V/μs and maximum power consumption of 125 mW per amplifier.
Applications
- Ultrasound Imaging Systems: Optimized for use in ultrasound imaging, providing precise gain and low noise.
- High Performance Audio: Suitable for audio systems requiring low noise and high fidelity.
- RF AGC Systems: Used in radio frequency automatic gain control systems for stable and precise gain adjustment.
- Signal Measurement: Applicable to any application requiring precise gain, low noise, and wide bandwidth.
Q & A
- What is the gain range of the AD602ARZ?
The gain range of the AD602ARZ is –10 dB to +30 dB.
- What is the input noise spectral density of the AD602ARZ?
The input noise spectral density is 1.4 nV/√Hz.
- What is the -3 dB bandwidth of the AD602ARZ?
The -3 dB bandwidth is 35 MHz, essentially independent of the gain.
- What is the slew rate of the AD602ARZ?
The slew rate is 275 V/μs.
- What is the maximum output voltage of the AD602ARZ into a 500 Ω load?
The maximum output voltage is ±2.5 V minimum into a 500 Ω load.
- Is the AD602ARZ TTL- and CMOS-compatible?
Yes, the AD602ARZ has TTL- and CMOS-compatible logic inputs for the signal gating function.
- What is the operating temperature range of the AD602ARZ?
The operating temperature range is -40°C to +85°C.
- What is the quiescent current per channel of the AD602ARZ?
The quiescent current per channel is 11 mA to 14 mA.
- What is the total harmonic distortion of the AD602ARZ at ±1 V output?
The total harmonic distortion is typically -60 dBc at ±1 V output into a 200 Ω load.
- Does the AD602ARZ have a signal gating function?
Yes, each channel has an independent gating facility that optionally blocks signal transmission and sets the dc output level to within a few millivolts of the output ground.
