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F1241 Datasheet(PDF) 1 Page - Renesas Technology Corp |
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F1241 Datasheet(HTML) 1 Page - Renesas Technology Corp |
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1 / 21 page  Dual IF Digital Variable Gain Amplifier 10 – 500 MHz IDTF1241NBGI IDT FlatNoise TM IF VGA 1 Rev O Nov 2012 IDTF1241 DATASHEET GENERAL DESCRIPTION The IDTF1241 (1 dB steps) is an IF VGA for Diversity Basestation receivers. The device offers significantly better Noise and Distortion performance than currently available devices. It is packaged in a compact 5x5 Thin QFN with 200 ohm differential input and output impedances for ease of integration into the receiver lineup. COMPETITIVE ADVANTAGE The IDTF1241 IF VGA improves system Signal-to-Noise Ratio (SNR), especially at lower gain settings. Via IDT’s proprietary FlatNoise TM technology both IIPP33 O O & & N NF F a arre e k ke ep ptt v viirrttu ua alllly y fflla att while gain is backed off, enhancing SNR significantly under high level interferer conditions, and greatly benefiting 2G/3G/4G Multi- Carrier IF sampling receivers. The fast-settling gain step of 1 dB coupled with pinpoint accuracy allow for SNR to be maximized further by targeting the minimum necessary gain in small, accurate increments. See the ‘Applications Information’ section starting on Page 17 for more details of the benefits of the F1241 in IF sampling receivers. PART# MATRIX Part# Range / Step IP3O IF freq range NF Pinout Compatibility F F1 12 24 41 1 2 20 0 tto o --1 11 1 1 1..0 0 4 48 8 1 10 0 -- 5 50 00 0 4 4 A AD DII F1240 20 to -11.5 0.5 47 10 - 500 4 TI (NSM) ORDERING INFORMATION FEATURES • Ideal for systems with high SNR requirements • 20 dB typical Maximum Gain • 5-bit, 1 dB step, 31 dB gain control range • • E Ex xcce elllle en ntt N No oiisse e F Fiig gu urre e = = 4 4..0 0 d dB B • 5mm x 5mm 32 pin package • 200 Differential Matched Input • 200 Differential Matched Output • No termination resistors required • • N NF F d de eg grra ad de ess jju usstt 1 1..3 3 d dB B @ @ 1 10 0 d dB B b be ello ow w M Ma ax x G Ga aiin n • 10 MHz – 500 MHz frequency range • Ultra-Linear: IIP P3 3OO + +4 48 8 d dB Bm m typical • Excellent 2 nd Harmonic Rejection < -80 dBc • Parallel Control • External current setting resistors • Very fast settling < 15 nsec • Individual Power Down Modes • • Extremely Low Power: 8 80 0 m mA A // C Ch ha an n APPLICATIONS • Base Station 2G, 3G, 4G, TDD radiocards • Repeaters and E911 systems • Digital Pre-Distortion • Point to Point Infrastructure • Public Safety Infrastructure • WIMAX Receivers and Transmitters • Military Systems, JTRS radios DEVICE BLOCK DIAGRAM Decode Logic VCC ATTN In A AMP out A Bias Control Gain Control VCC STBYB 10 STBYA ISET ATTN In B AMP out B 2 IDTF1241NBGI8 0.8 mm height package Green Industrial Temp range Omit IDT prefix RF product Line Tape & Reel FlatNoise TM FlatNoise TM |
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