Overview
The AD605AR, produced by Analog Devices Inc., is a dual, low noise, single-supply variable gain amplifier (VGA). This component is optimized for applications requiring high performance and wide bandwidth variable gain control. It operates from a single 5 V supply and features differential inputs along with unipolar gain control, making it user-friendly. The AD605AR utilizes a differential input, single-supply, exponential amplifier (DSX-AMP) architecture, which includes a variable attenuator followed by a high-speed, fixed-gain amplifier. This architecture ensures a high performance linear-in-dB response and low noise operation.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Supply Voltage | 4.5 to 5.5 | V |
| Supply Current per Channel | 18 | mA |
| Power Consumption per Channel | 90 | mW |
| Input Noise Spectral Density | 1.8 | nV/√Hz |
| Input Signal Range | ±2.0 | V |
| Gain Range per Channel | -14 dB to +34 dB or 0 dB to +48 dB | dB |
| Gain Scaling | 20 dB/V to 40 dB/V | dB/V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 16-lead PDIP, 16-lead SOIC_N |
Key Features
- Dual, independent linear-in-dB channels
- Low noise operation with 1.8 nV/√Hz input noise spectral density
- Single 5 V supply with low power consumption of 90 mW per channel
- Differential inputs and unipolar gain control
- User-determined gain range and external reference input for gain scaling (dB/V)
- Power shutdown at the lower end of the gain control
- Output common mode independently set
- High-speed, fixed-gain amplifier following a 7-stage R-1.5R ladder network attenuator
Applications
- Ultrasound and sonar time-gain controls
- High performance Automatic Gain Control (AGC) systems
- Signal measurement and processing
- Driving ADCs directly
Q & A
- What is the supply voltage range for the AD605AR?
The AD605AR operates from a single supply voltage of 4.5 V to 5.5 V.
- How much power does each channel of the AD605AR consume?
Each channel of the AD605AR consumes approximately 90 mW.
- What is the input noise spectral density of the AD605AR?
The input noise spectral density is 1.8 nV/√Hz.
- What is the gain range of each channel in the AD605AR?
The gain range per channel can be set between -14 dB to +34 dB or 0 dB to +48 dB, depending on the configuration.
- How is the gain scaling controlled in the AD605AR?
The gain scaling is controlled by an external reference input and can be set from 20 dB/V to 40 dB/V.
- What are the package options for the AD605AR?
The AD605AR is available in 16-lead PDIP and 16-lead SOIC_N packages.
- What is the operating temperature range of the AD605AR?
The AD605AR operates over a temperature range of -40°C to +85°C.
- Can the AD605AR be used in ultrasound applications?
- How does the AD605AR handle power shutdown?
The AD605AR features power shutdown at the lower end of the gain control, drawing only 1.9 mA when VGN is <50 mV.
- Can the output common mode of the AD605AR be independently set?
