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F1950Z Datasheet(PDF) 1 Page - Integrated Device Technology |
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F1950Z Datasheet(HTML) 1 Page - Integrated Device Technology |
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1 / 17 page  7-bit 0.25 dB Digital Step Attenuator 150 MHz to 4000 MHz Glitch-Free TM Digital Step Attenuator 1 Rev1 March 2012 IDTF1950 DATASHEET GENERAL DESCRIPTION This document describes the specification for the IDTF1950 Digital Step Attenuator. The F1950 is part of a family of Glitch-Free TM DSAs optimized for the demanding requirements of communications Infrastructure. These devices are offered in a compact 4x4 QFN package with 50 impedances for ease of integration into the radio system. COMPETITIVE ADVANTAGE Digital step attenuators are used in Receivers and Transmitters to provide gain control. The IDTF1950 is a 7-bit step attenuator optimized for these demanding applications. The silicon design has very low insertion loss and low distortion (+65 dBm IP3I.) The device has pinpoint accuracy and settles to final attenuation value within 400 nsec. Most importantly, the F1950 includes IDT’s G Glliittc ch h--F Frre ee eT TM M technology which results in less than 0.6 dB of overshoot ringing during MSB transitions. This is in stark contrast to competing DSAs that glitch as much as 10 dB during MSB transitions (see p.10) L Lo ow we esstt iin nsse errttiio on n llo ossss ffo orr b be esstt S SN NR R G Glliittcch h--F Frre ee eT TM M w wh he en n ttrra an nssiittiio on niin ng g – – w wo on n’’tt d da am ma ag ge e P PA A o orr A AD DC C E Ex xttrre em me elly y a accccu urra atte e w wiitth h llo ow w d diisstto orrttiio on 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 • RFID handheld and portable readers • Cable Infrastructure PART# MATRIX Part# Freq range Resolution / Range Control IL Pinout F F1 19 95 50 0 1 15 50 0 -- 4 40 00 00 0 0 0..2 25 5 // 3 31 1..7 75 5 P Pa arra alllle ell & & S Se erriia all --1 1..3 3 P PE E F1951 100 - 4000 0.50 / 31.5 Serial Only -1.2 HITT F1952 100 – 4000 0.50 / 15.5 Serial Only -0.9 HITT FEATURES • Glitch-Free TM, < 0.6 dB transient overshoot • Spurious Free Design • 3V to 5V supply • Attenuation Error < 0.3 dB @ 2 GHz • Low Insertion Loss < 1.3 dB @ 2 GHz • Excellent Linearity +65 dBm IP3I • Fast settling time, < 400 nsec • Class 2 JEDEC ESD (> 2kV HBM) • Serial & Parallel Interface 31.75 dB Range • 4x4 mm Thin QFN 24 pin package DEVICE BLOCK DIAGRAM ORDERING INFORMATION RF1 Bias VDD VMODE DEC D[6:0] 7 CLK SPI LE DATA RF2 IDTF1950NBGI8 0.8 mm height package Green Industrial Temp range Tape & Reel Omit IDT prefix RF product Line Glitch-Free TM Glitch-Free TM |
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