Overview
The AD8330ARQZ, 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 gain control with a range of 0 dB to 50 dB, adjustable via the VDBS pin, and an additional gain control port at the VMAG pin that allows the numeric gain to be varied from 0.03 to 10. The AD8330ARQZ is available in 16-lead LFCSP and 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 | - | 50 | dB |
| Gain Control Voltage (VDBS) | 0 | - | 1.5 | V |
| Gain Multiplication Factor (VMAG) | 0.03 | - | 10 | - |
| Bandwidth | - | - | 150 | MHz |
| Noise (at Maximum Gain) | - | 5 | - | nV/√Hz |
| Distortion (Typical) | - | - | −62 | dBc |
| Power Consumption (Typical) | - | 20 | - | mA |
| Supply Voltage Range | 2.7 | - | 6 | V |
| Operating Temperature Range | −40 | - | +85 | °C |
Key Features
- Linear-in-dB and linear-in-magnitude gain modes with a range of 0 dB to 50 dB and adjustable numeric gain from 0.03 to 10 via 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 of 20 mA typical at supply voltages from 2.7 V to 6 V.
- Two levels of power-down: fully off and hibernate mode.
- External capacitor at Pin OFST for setting the high-pass corner of an offset reduction loop, and dc-coupled signal path when Pin OFST is grounded.
- Available in 16-lead LFCSP and QSOP packages.
Applications
- Pre-ADC signal conditioning.
- 75 Ω cable driving and AGC amplifiers.
- Digital TV broadcast and satellite earth station receivers.
- Cellular radio systems.
- Other variable gain amplifier applications requiring high channel counts and stable HF response).
Q & A
- What is the gain range of the AD8330ARQZ?
The gain range of the AD8330ARQZ is from 0 dB to 50 dB, controlled by the voltage applied to the VDBS pin. Additionally, the numeric gain can be varied from 0.03 to 10 using the VMAG pin).
- What is the bandwidth of the AD8330ARQZ?
The bandwidth of the AD8330ARQZ is 150 MHz, which remains constant across all gain settings).
- What are the noise and distortion characteristics of the AD8330ARQZ?
The AD8330ARQZ has a typical noise of 5 nV/√Hz at maximum gain and a distortion of ≤−62 dBc typical).
- What are the power consumption and supply voltage requirements of the AD8330ARQZ?
The AD8330ARQZ typically consumes 20 mA of power and operates from supply voltages ranging from 2.7 V to 6 V).
- What are the available package options for the AD8330ARQZ?
The AD8330ARQZ is available in 16-lead LFCSP and QSOP packages).
- What is the operating temperature range of the AD8330ARQZ?
The AD8330ARQZ operates from −40°C to +85°C).
- Does the AD8330ARQZ support power-down modes?
Yes, the AD8330ARQZ supports two levels of power-down: fully off and hibernate mode).
- How can the offset reduction loop be configured in the AD8330ARQZ?
An external capacitor at Pin OFST sets the high-pass corner of the offset reduction loop. When Pin OFST is grounded, the signal path becomes dc-coupled).
- What are some common applications of the AD8330ARQZ?
The AD8330ARQZ is commonly used in pre-ADC signal conditioning, 75 Ω cable driving, AGC amplifiers, digital TV broadcast, satellite earth station receivers, and cellular radio systems).
- How does the AD8330ARQZ handle high-frequency responses?
The AD8330ARQZ maintains a constant bandwidth and pulse response across all gain settings, ensuring stable HF response over the gain range).
