AD8330
PRODUCTIONLow Cost, DC to 150 MHz, Variable Gain Amplifier
- Part Models
- 6
- 1ku List Price
- Starting From $5.86
Part Details
- Fully differential signal path, also used with single-sided signals
- Inputs from 0.3 mV to 1 V rms, rail-to-rail outputs
- Differential RIN = 1 kΩ; ROUT (each output) 75 Ω
- Automatic offset compensation (optional)
- Linear-in-dB and linear-in-magnitude gain modes
- 0 dB to 50 dB, for 0 V < VDBS < 1.5 V (30 mV/dB)
- Inverted gain mode: 50 dB to 0 dB at −30 mV/dB
- ×0.03 to ×10 nominal gain for 15 mV < VMAG < 5 V
- Constant bandwidth: 150 MHz at all gains
- Low noise: 5 nV/√Hz typical at maximum gain
- Low distortion: ≤−62 dBc typical
- Low power: 20 mA typical at VS of 2.7 V to 6 V
- Available in a space-saving, 3 mm × 3 mm LFCSP package
The AD8330 is a wideband variable gain amplifier for applications requiring a fully differential signal path, low noise, well-defined gain, and moderately low distortion, from dc to 150 MHz. The input pins can also be driven from a single-ended source. The peak differential input is ±2 V, allowing sine wave operation at 1 V rms with generous headroom. The output pins can drive single-sided loads essentially rail-to-rail. The differential output resistance is 150 Ω. The output swing is a linear function of the voltage applied to the VMAG pin that internally defaults to 0.5 V, providing a peak output of ±2 V. This can be raised to 10 V p-p, limited by the supply voltage.
The basic gain function is linear-in-dB, controlled by the voltage applied to Pin VDBS. The gain ranges from 0 dB to 50 dB for control voltages between 0 V and 1.5 V—a slope of 30 mV/dB. The gain linearity is typically within ±0.1 dB. By changing the logic level on Pin MODE, the gain decreases over the same range, with an opposite slope. A second gain control port is provided at the VMAG pin and allows the user to vary the numeric gain from a factor of 0.03 to 10. All the parameters of the AD8330 have low sensitivities to temperature and supply voltages. Using VMAG, the basic 0 dB to 50 dB range can be repositioned to any value from 20 dB higher (that is, 20 dB to 70 dB) to at least 30 dB lower (that is, –30 dB to +20 dB) to suit the application, thereby providing an unprecedented gain range of over 100 dB. A unique aspect of the AD8330 is that its bandwidth and pulse response are essentially constant for all gains, over both the basic 50 dB linear-in-dB range, but also when using the linearin-magnitude function. The exceptional stability of the HF response over the gain range is of particular value in those VGA applications where it is essential to maintain accurate gain lawconformance at high frequencies.
An external capacitor at Pin OFST sets the high-pass corner of an offset reduction loop, whose frequency can be as low as 5 Hz. When this pin is grounded, the signal path becomes dc-coupled. When used to drive an ADC, an external common-mode control voltage at Pin CNTR can be driven to within 0.5 V of either ground or VS to accommodate a wide variety of requirements. By default, the two outputs are positioned at the midpoint of the supply, VS/2. Other features, such as two levels of power-down (fully off and a hibernate mode), further extend the practical value of this exceptionally versatile VGA.
The AD8330 is available in 16-lead LFCSP and 16-lead QSOP packages and is specified for operation from −40°C to +85°C.
Applications
- Pre-ADC signal conditioning
- 75 Ω cable driving adjust
- AGC amplifiers
Documentation
Data Sheet 1
User Guide 1
Evaluation Design File 1
Frequently Asked Question 1
Product Selection Guide 1
Tutorial 1
Analog Dialogue 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8330ACPZ-R2 | 16-Lead LFCSP (3mm x 3mm w/ EP) | ||
| AD8330ACPZ-R7 | 16-Lead LFCSP (3mm x 3mm w/ EP) | ||
| AD8330ACPZ-RL | 16-Lead LFCSP (3mm x 3mm w/ EP) | ||
| AD8330ARQZ | 16-Lead QSOP | ||
| AD8330ARQZ-R7 | 16-Lead QSOP | ||
| AD8330ARQZ-RL | 16-Lead QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Dec 10, 2014 - 14_0038 Conversion of 3x3mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines |
||
| AD8330ACPZ-R2 | ||
| AD8330ACPZ-R7 | PRODUCTION | |
| AD8330ACPZ-RL | PRODUCTION | |
|
Mar 23, 2009 - 09_0041 ADWIL Fab XFCB2 Front End Manufacturing Change |
||
| AD8330ACPZ-R2 | ||
| AD8330ACPZ-R7 | PRODUCTION | |
| AD8330ACPZ-RL | PRODUCTION | |
| AD8330ARQZ | PRODUCTION | |
| AD8330ARQZ-R7 | ||
| AD8330ARQZ-RL | PRODUCTION | |
|
Sep 9, 2009 - 07_0083 Polyimide Change |
||
| AD8330ACPZ-R7 | PRODUCTION | |
| AD8330ACPZ-RL | PRODUCTION | |
| AD8330ARQZ | PRODUCTION | |
| AD8330ARQZ-R7 | ||
| AD8330ARQZ-RL | PRODUCTION | |
|
Aug 26, 2010 - 10_0001 Halogen Free Material Change for QSOP Products |
||
| AD8330ARQZ | PRODUCTION | |
| AD8330ARQZ-R7 | ||
| AD8330ARQZ-RL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
SPICE Model 1
Evaluation Kits
AD8330 Evaluation Board