Overview
The AD604ARSZ-RL, produced by Analog Devices Inc., is an ultralow noise, 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 and a 300 kΩ input resistance. The amplifier provides user-determined gain ranges, gain scaling (dB/V), and dc level shifting of output, enhancing its versatility and performance.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | ±6.5 V |
| Input Resistance | 300 kΩ |
| Gain Range | 0 dB to 48 dB (with preamplifier gains of 14 dB and 20 dB) |
| Gain Scaling | Up to 40 dB/V (with reduced accuracy above 30 dB/V) |
| Input Noise Voltage | 0.8 nV/√Hz |
| Operating Temperature Range | −40°C to +85°C |
| Power Dissipation | 1.1 W (SSOP package) |
| Quiescent Supply Current | VPOS: 32-36 mA, VNEG: -15 to -12 mA |
| Package Type | 24-Lead SSOP |
Key Features
- Ultralow input noise at maximum gain (0.8 nV/√Hz)
- Dual-channel, linear-in-dB variable gain amplifier
- High-performance preamplifier with input-referred noise voltage
- Variable attenuator (0 dB to 48.36 dB) followed by a high-speed fixed-gain amplifier
- 7-stage R-1.5R ladder network for attenuation
- Unipolar gain control and dc level shifting of output
- Access to the output of the preamplifier for external filtering
- Cascadable channels for greater gain range
Applications
The AD604ARSZ-RL is primarily optimized for ultrasound applications but is also suitable for any application requiring low noise, wide bandwidth, and variable gain control. This includes medical imaging, audio processing, and other signal processing applications where precise gain control and low noise are critical.
Q & A
- What is the primary application of the AD604ARSZ-RL? The AD604ARSZ-RL is primarily optimized for ultrasound applications.
- What is the input noise voltage of the AD604ARSZ-RL? The input noise voltage is 0.8 nV/√Hz.
- What is the gain range of the AD604ARSZ-RL? The gain range is 0 dB to 48 dB, with preamplifier gains of 14 dB and 20 dB.
- What is the gain scaling of the AD604ARSZ-RL? The gain scaling is up to 40 dB/V, with reduced accuracy above 30 dB/V.
- What is the operating temperature range of the AD604ARSZ-RL? The operating temperature range is −40°C to +85°C.
- What is the package type of the AD604ARSZ-RL? The package type is 24-Lead SSOP.
- Can the channels of the AD604ARSZ-RL be cascaded? Yes, the channels can be cascaded to provide greater levels of gain range.
- What is the power dissipation of the AD604ARSZ-RL in SSOP package? The power dissipation is 1.1 W.
- What is the quiescent supply current of the AD604ARSZ-RL? The quiescent supply current is VPOS: 32-36 mA, VNEG: -15 to -12 mA.
- Is the AD604ARSZ-RL suitable for other applications besides ultrasound? Yes, it is suitable for any application requiring low noise, wide bandwidth, and variable gain control.
