F1241
Low-noise Dual IF VGA with FlatNoise™
The F1241 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 1.0 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
- 5 bit control
- 1.0 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 Control
- External current setting resistors
- Very fast settling < 15 nsec
- Individual Power Down Modes
- Extremely low power consumption: 79 mA / Ch
