IDTF1200

DATASHEET Intermediate Frequency Digital Variable Gain Amplifier IDTF1200 GENERAL DESCRIPTION The IDTF1200 is a Digitally Controlled Intermediate Frequency Differential Variable Gain Amplifier for BaseStation and other commercial applications with a low IF frequency. The device offers extremely low Noise Figure over the entire gain control range. The device is packaged in compact 5x5 Thin QFNs with 200 ohm differential input and output impedances for ease of integration into the receiver lineup. Versions covering IF frequencies up to 300 MHz with low distortion are available. FEATURES               Ideal for high SNR systems 22 dB typ Maximum Gain 23 dB gain control range 7 bit parallel control 0.25 dB Gain Steps Excellent Noise Figure < 3.0 dB 5mm x 5mm 28 pin package 200 Ω Differential Input 200 Ω Differential Output NF degrades < 2dB @ 12dB reduced gain 50 MHz – 160 MHz frequency range Ultra-Linear: IP3O +48 dBm typical External current setting resistor Fast Gain Step Settling < 20 nsec COMPETITIVE ADVANTAGE The F1200 acts to enhance system SNR when VGA gain is reduced. The F1200 noise figure (NF) degrades only slightly (NF slope ~ -0.16 dB/dB) over a 13 dB control range while holding the Output IP3 approximately constant. The resultant improvement in noise can enhance the system SNR up to 2 decibels at low gain settings relative to a standard VGA. The device has excellent DNL and INL simplifying digital compensation. The device also offers the extremely l...