Overview
The AD604ARSZ-R7, produced by Analog Devices Inc., is an ultralow noise, very accurate, dual-channel, linear-in-dB variable gain amplifier (VGA). This device is optimized for time-based variable gain control, particularly in ultrasound applications, but it is also suitable for any application requiring low noise, wide bandwidth, and variable gain control.
Each channel of the AD604 features a high-performance preamplifier with an input-referred noise voltage of 0.8 nV/√Hz. The amplifier utilizes a differential input exponential amplifier (DSX-AMP) architecture, which includes a variable attenuator followed by a high-speed fixed-gain amplifier. This design ensures a very accurate linear-in-dB response.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 2 | - |
| Input Resistance | 300 kΩ | - |
| Input-Referred Noise Voltage | 0.8 nV/√Hz | - |
| Gain Range per Channel | 0 dB to 48 dB, 6 dB to 54 dB | - |
| Gain Scaling | Up to 40 dB/V (accurate up to 30 dB/V) | - |
| Gain Control Voltage Range | 0.4 V to 2.4 V | V |
| Supply Voltage | ±5 V | V |
| Quiescent Supply Current (per channel) | 32-36 mA (VPOS), -15 to -12 mA (VNEG) | mA |
| Power Dissipation (per channel) | 220 mW | mW |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 24-Lead SSOP | - |
Key Features
- Ultralow noise and high accuracy, making it suitable for applications requiring precise signal processing.
- Dual-channel design with each channel featuring a high-performance preamplifier and a variable attenuator followed by a fixed-gain amplifier.
- Linear-in-dB gain response achieved through the DSX-AMP architecture.
- User-determined gain ranges and gain scaling (up to 40 dB/V) for flexible control.
- DC level shifting of output for further performance optimization.
- Access to the output of the preamplifier for external filtering.
- Low power consumption with quiescent supply currents of 32-36 mA (VPOS) and -15 to -12 mA (VNEG) per channel.
- Compact 24-Lead SSOP package.
Applications
The AD604ARSZ-R7 is primarily optimized for time-based variable gain control in ultrasound applications. However, its low noise, wide bandwidth, and variable gain control capabilities make it suitable for a variety of other applications, including:
- Medical imaging and diagnostics.
- Instrumentation and measurement systems.
- Communication systems requiring precise signal amplification.
- Industrial control systems where accurate signal processing is critical.
Q & A
- What is the primary application of the AD604ARSZ-R7?
The AD604ARSZ-R7 is primarily optimized for time-based variable gain control in ultrasound applications.
- How many channels does the AD604ARSZ-R7 have?
The AD604ARSZ-R7 has two channels.
- What is the input-referred noise voltage of the AD604ARSZ-R7?
The input-referred noise voltage is 0.8 nV/√Hz.
- What is the gain range per channel of the AD604ARSZ-R7?
The gain range per channel is from 0 dB to 48 dB and from 6 dB to 54 dB.
- What is the gain scaling range of the AD604ARSZ-R7?
The gain scaling range is up to 40 dB/V, with accurate scaling up to 30 dB/V.
- What is the supply voltage range for the AD604ARSZ-R7?
The supply voltage range is ±5 V.
- What is the quiescent supply current per channel?
The quiescent supply current is 32-36 mA (VPOS) and -15 to -12 mA (VNEG) per channel.
- What is the operating temperature range of the AD604ARSZ-R7?
The operating temperature range is -40°C to +85°C.
- In what package type is the AD604ARSZ-R7 available?
The AD604ARSZ-R7 is available in a 24-Lead SSOP package.
- Can the channels of the AD604ARSZ-R7 be cascaded for greater gain range?
