Overview
The AD8330ARQ-REEL, produced by Analog Devices Inc., is a wideband variable gain amplifier designed for applications requiring a fully differential signal path, low noise, well-defined gain, and moderately low distortion. This amplifier operates from DC to 150 MHz, making it suitable for a variety of high-frequency applications. It features a linear-in-dB and linear-in-magnitude gain control, with a gain range of 0 dB to 50 dB, and an additional gain multiplication factor from 0.03 to 10 via the VMAG pin. The AD8330 is available in 16-lead LFCSP and 16-lead QSOP packages and is specified for operation from -40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Range (VDBS Control) | 0 dB | - | 50 dB | - |
| Gain Multiplication Factor (VMAG Control) | 0.03 | - | 10 | - |
| Bandwidth | - | 150 MHz | - | - |
| Noise Spectral Density | - | 5 nV/√Hz | - | - |
| Distortion | - | ≤ -62 dBc | - | - |
| Supply Voltage | 2.7 V | - | 6 V | - |
| Supply Current | - | 20 mA | - | - |
| Operating Temperature | -40°C | - | +85°C | - |
| Package Type | - | LFCSP, QSOP | - | - |
Key Features
- Linear-in-dB and linear-in-magnitude gain modes with a range of 0 dB to 50 dB and an additional gain multiplication factor from 0.03 to 10 via the VMAG pin.
- Constant bandwidth of 150 MHz at all gains, ensuring stable high-frequency response.
- Low noise of 5 nV/√Hz typical at maximum gain and low distortion of ≤ -62 dBc typical.
- Low power consumption of 20 mA typical at supply voltages from 2.7 V to 6 V.
- Available in space-saving 16-lead LFCSP and 16-lead QSOP packages.
- Two levels of power-down: fully off and a hibernate mode.
- External capacitor at Pin OFST for setting the high-pass corner of an offset reduction loop, and optional dc-coupling by grounding this pin.
- External common-mode control voltage at Pin CNTR for accommodating various ADC requirements).
Applications
- Pre-ADC signal conditioning to ensure optimal signal quality before analog-to-digital conversion).
- 75 Ω cable driving and adjustment for applications requiring precise signal transmission over cables).
- Automatic Gain Control (AGC) amplifiers where dynamic gain adjustment is necessary).
Q & A
- What is the gain range of the AD8330?
The AD8330 has a gain range of 0 dB to 50 dB, controlled by the voltage applied to the VDBS pin, and an additional gain multiplication factor from 0.03 to 10 via the VMAG pin).
- What is the bandwidth of the AD8330?
The bandwidth of the AD8330 is 150 MHz, which remains constant across all gain settings).
- What is the typical noise spectral density of the AD8330?
The typical noise spectral density of the AD8330 is 5 nV/√Hz at maximum gain).
- What are the supply voltage and current requirements of the AD8330?
The AD8330 operates with a supply voltage from 2.7 V to 6 V and consumes a typical current of 20 mA).
- What are the available package types for the AD8330?
The AD8330 is available in 16-lead LFCSP and 16-lead QSOP packages).
- How does the AD8330 handle power-down modes?
The AD8330 features two levels of power-down: fully off and a hibernate mode).
- Can the AD8330 be used for dc-coupled applications?
Yes, the AD8330 can be used for dc-coupled applications by grounding the OFST pin).
- How does the AD8330 accommodate different ADC requirements?
The AD8330 allows for an external common-mode control voltage at Pin CNTR to accommodate a wide variety of ADC requirements).
- What is the operating temperature range of the AD8330?
The AD8330 is specified for operation from -40°C to +85°C).
- Can the input of the AD8330 be driven from a single-ended source?
Yes, the input pins of the AD8330 can also be driven from a single-ended source).
