Overview
The AD8330ACPZ-R7, 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 numeric gain control from 0.03 to 10 via the VMAG pin. The AD8330 is available in a compact 16-lead LFCSP package and is specified for operation from -40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Range (Linear-in-dB) | 0 dB | - | 50 dB | - |
| Gain Control Voltage (VDBS) | 0 V | - | 1.5 V | - |
| Bandwidth | - | 150 MHz | - | - |
| Noise | - | 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 | - | 16-lead LFCSP | - | - |
Key Features
- Linear-in-dB and linear-in-magnitude gain modes with a gain range of 0 dB to 50 dB and an additional numeric gain control from 0.03 to 10 via the VMAG pin.
- Constant bandwidth of 150 MHz at all gains, ensuring stable HF response over the gain range.
- Low noise of 5 nV/√Hz typical at maximum gain and low distortion of ≤−62 dBc typical.
- Low power consumption with a typical supply current of 20 mA at a supply voltage of 2.7 V to 6 V.
- 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 external common-mode control voltage at Pin CNTR for driving an ADC.
- Compact 16-lead LFCSP package and 16-lead QSOP package options.
Applications
- Pre-ADC signal conditioning: The AD8330 is ideal for conditioning signals before they are fed into an analog-to-digital converter (ADC), ensuring optimal signal quality.
- 75 Ω cable driving: Suitable for driving 75 Ω cables, making it useful in various communication and video transmission applications.
- Automatic Gain Control (AGC) amplifiers: The variable gain feature makes it suitable for AGC applications 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 in linear-in-dB mode, and an additional numeric gain control from 0.03 to 10 via the VMAG pin.
- What is the bandwidth of the AD8330?
The bandwidth of the AD8330 is 150 MHz at all gains.
- What are the noise and distortion specifications of the AD8330?
The AD8330 has a typical noise of 5 nV/√Hz at maximum gain and a typical distortion of ≤−62 dBc.
- What are the power-down modes available in the AD8330?
The AD8330 has two levels of power-down: fully off and a hibernate mode.
- What is the operating temperature range of the AD8330?
The AD8330 operates from -40°C to +85°C.
- What package types are available for the AD8330?
The AD8330 is available in 16-lead LFCSP and 16-lead QSOP packages.
- How does the AD8330 control its gain?
The gain is controlled by the voltage applied to the VDBS pin for linear-in-dB mode and by the VMAG pin for numeric gain control.
- Can the AD8330 be used for single-ended input signals?
Yes, the AD8330 can be driven from a single-ended source.
- What is the purpose of the OFST pin in the AD8330?
The OFST pin sets the high-pass corner of an offset reduction loop, and when grounded, the signal path becomes dc-coupled.
- How does the AD8330 accommodate different common-mode requirements for ADCs?
An external common-mode control voltage at Pin CNTR can be driven to within 0.5 V of either ground or VS to accommodate various ADC requirements.
