F1241中文资料Low-noise Dual IF VGA with FlatNoise™数据手册Renesas规格书

描述 Description

The IDT 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.

特性 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