Overview
The AD605BRZ-R7, produced by Analog Devices Inc., is a dual, low noise, single-supply variable gain amplifier (VGA). This device 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 AD605BRZ-R7 utilizes the 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 spectral density of 1.8 nV/√Hz.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 4.5 to 5.5 | V |
| Operating Temperature Range | −40°C to +85°C | °C |
| Input Noise Spectral Density | 1.8 | nV/√Hz |
| Input Signal Range | ±2.0 | V |
| Gain Range per Channel | −14 dB to +34 dB, 0 dB to +48 dB | dB |
| Maximum Gain Range (Cascaded) | 96 dB | dB |
| Gain Control Scale Factors | 20 dB/V to 30 dB/V (up to 40 dB/V with reduced accuracy) | dB/V |
| Quiescent Supply Current per Channel | 18 mA | mA |
| Power Dissipation | 90 mW | mW |
| Package Type | 16-Lead SOIC_N |
Key Features
- Dual-channel, low noise, single-supply variable gain amplifier.
- Differential inputs and unipolar gain control for ease of use.
- User-determined gain range and external reference input for gain scaling (dB/V).
- High performance linear-in-dB response using DSX-AMP architecture.
- Variable attenuator based on a 7-stage R-1.5R ladder network.
- Gain control interface with input resistance of approximately 2 MΩ.
- Power-down feature to reduce current consumption to 1.9 mA when VGN is < 50 mV.
- High speed, fixed-gain amplifier stage.
- Operating from a single 5 V supply.
Applications
The AD605BRZ-R7 is suitable for various high-performance applications requiring wide bandwidth variable gain control, such as:
- Audio and video signal processing.
- Medical imaging and diagnostic equipment.
- Industrial control and automation systems.
- Telecommunications and wireless communication systems.
- Test and measurement equipment.
Q & A
- What is the operating supply voltage range of the AD605BRZ-R7?
The AD605BRZ-R7 operates from a single supply voltage range of 4.5 V to 5.5 V.
- What is the input noise spectral density of the AD605BRZ-R7?
The input noise spectral density is 1.8 nV/√Hz.
- What are the gain range options for each channel of the AD605BRZ-R7?
Each channel can have a gain range of −14 dB to +34 dB or 0 dB to +48 dB, selectable by a single resistor.
- How much gain can be achieved by cascading the two channels of the AD605BRZ-R7?
Cascading the two channels can provide up to 96 dB of gain.
- What are the gain control scale factors available for the AD605BRZ-R7?
The gain control scale factors range from 20 dB/V to 30 dB/V, with options up to 40 dB/V with reduced accuracy.
- What is the quiescent supply current per channel for the AD605BRZ-R7?
The quiescent supply current per channel is 18 mA.
- How does the power-down feature work on the AD605BRZ-R7?
The device powers down to draw 1.9 mA when the VGN voltage is less than 50 mV.
- What is the package type of the AD605BRZ-R7?
The AD605BRZ-R7 is available in a 16-Lead SOIC_N package.
- What is the operating temperature range of the AD605BRZ-R7?
The operating temperature range is −40°C to +85°C.
- What are some typical applications for the AD605BRZ-R7?
Typical applications include audio and video signal processing, medical imaging, industrial control, telecommunications, and test and measurement equipment.
