Overview
The AD8330ARQZ-RL, 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. The AD8330 features a linear-in-dB gain control with a range of 0 dB to 50 dB, adjustable via the VDBS pin, and an additional linear-in-magnitude gain control through the VMAG pin, allowing for a gain range of over 100 dB. The device is available in a 16-lead QSOP package and is specified for operation from −40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature | −40°C | +85°C | ||
| Gain Range (Linear-in-dB) | 0 dB | 50 dB | ||
| Gain Control Voltage (VDBS) | 0 V | 1.5 V | ||
| Bandwidth | 150 MHz | |||
| Noise (at maximum gain) | 5 nV/√Hz | |||
| Distortion (at maximum gain) | ≤−62 dBc | |||
| Supply Voltage | 2.7 V | 6 V | ||
| Supply Current (typical) | 20 mA | |||
| Package Type | 16-Lead QSOP |
Key Features
- Linear-in-dB and Linear-in-Magnitude Gain Modes: The AD8330 offers a gain range of 0 dB to 50 dB controlled by VDBS, and an additional gain control via VMAG, allowing for a gain range of over 100 dB.
- Constant Bandwidth: The bandwidth remains constant at 150 MHz across all gain settings, ensuring stable high-frequency response.
- Low Noise and Distortion: Typical noise of 5 nV/√Hz and distortion of ≤−62 dBc at maximum gain.
- Low Power Consumption: Typical supply current of 20 mA with a supply voltage range of 2.7 V to 6 V.
- Power-Down Modes: Features full shutdown and hibernate modes to reduce power consumption.
- Offset Reduction Loop: An external capacitor at Pin OFST can set the high-pass corner of an offset reduction loop as low as 5 Hz.
- Differential Output: The output pins can drive single-sided loads essentially rail-to-rail with a differential output resistance of 150 Ω.
Applications
- Pre-ADC Signal Conditioning: Ideal for driving analog-to-digital converters (ADCs) due to its low noise and well-defined gain characteristics.
- 75 Ω Cable Driving: Suitable for applications requiring signal transmission over 75 Ω cables.
- Automatic Gain Control (AGC) Amplifiers: The variable gain feature makes it suitable for AGC applications.
- High-Frequency Signal Processing: The constant bandwidth and low distortion make it ideal for high-frequency signal processing applications.
Q & A
- What is the operating temperature range of the AD8330ARQZ-RL?
The operating temperature range is from −40°C to +85°C.
- What is the gain range of the AD8330ARQZ-RL?
The gain range is from 0 dB to 50 dB, with an additional linear-in-magnitude gain control allowing for a range of over 100 dB.
- What is the bandwidth of the AD8330ARQZ-RL?
The bandwidth is 150 MHz across all gain settings.
- What is the typical noise of the AD8330ARQZ-RL at maximum gain?
The typical noise is 5 nV/√Hz at maximum gain.
- What are the power-down modes available in the AD8330ARQZ-RL?
The device features full shutdown and hibernate modes.
- How does the AD8330ARQZ-RL handle offset reduction?
An external capacitor at Pin OFST can set the high-pass corner of an offset reduction loop as low as 5 Hz.
- What is the differential output resistance of the AD8330ARQZ-RL?
The differential output resistance is 150 Ω.
- Can the AD8330ARQZ-RL be used for single-ended input sources?
Yes, the input pins can also be driven from a single-ended source.
- What are some common applications of the AD8330ARQZ-RL?
Common applications include pre-ADC signal conditioning, 75 Ω cable driving, AGC amplifiers, and high-frequency signal processing.
- In what package types is the AD8330ARQZ-RL available?
The AD8330ARQZ-RL is available in a 16-lead QSOP package.
