Overview
Description
The IDT F1240 IF VGA featuring FlatNoise™ technology improves system SNR, especially at lower gain settings. By keeping both IP3O & NF flat while gain is backed off, the system SNR is improved significantly under high level interferer conditions, especially when considering alias noise in an IF sampling receiver. The fast-settling, parallel mode gain step of 0.50 dB coupled with the excellent differential non-linearity allow for SNR to be maximized further by targeting the minimum necessary gain in small, accurate increments. The matched output does not require a terminating resistor, thus the gain and distortion performance are preserved when driving Bandpass Anti-Alias filters.
Features
- Ideal for systems with high SNR requirements
- 20 dB typical Maximum Gain
- 31 dB gain control range
- 6 bit control
- 0.50 dB Gain Steps
- Excellent Noise Figure ~ 4.0 dB
- 5mm x 5mm 32 pin package
- 200 ohm Differential Matched Input
- 200 ohm Differential Matched Output
- No termination resistor required
- NF degrades < 2dB @ 10 dB reduced gain
- 10 MHz – 500 MHz frequency range
- Ultra-Linear: IP3O +47 dBm typical
- Excellent 2nd Harmonic Rejection
- Parallel / Serial Control
- External current setting resistors
- Very fast settling < 15 nsec
- Individual Power Down Modes
- Extremely low power consumption: 79 mA / Ch
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 15.44 MB | |
| Guide | PDF 2.24 MB | |
| Guide | PDF 2.83 MB | |
| Product Change Notice | PDF 39 KB | |
| Product Change Notice | PDF 35 KB | |
| Product Change Notice | PDF 33 KB | |
| Product Change Notice | PDF 950 KB | |
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Design & Development
Software & Tools
Boards & Kits
Evaluation
F1240EVBI
Active
Evaluation Board for F1240 Dual Intermediate Frequency Digital Variable Gain Amplifier
The F1240EVBI is a fully populated evaluation board which allows the customer to easily evaluate the F1240 Dual Intermediate Frequency Digital Variable Gain Amplifier. Attenuation may be set using either the F1240’s parallel control input or its serial control input by setting Vmode to the...
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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