FEATURES DESCRIPTION TM Glitch-Free , < 0.6 dB transient overshoot This document describes the specification for the F1951 Spurious Free Design Digital Step Attenuator. The F1951 is part of a family of TM 3 V to 5.25 V supply Glitch-Free DSAs optimized for the demanding Attenuation Error < 0.2 dB 2 GHz requirements of communications Infrastructure. These Low Insertion Loss < 1.2 dB 2 GHz devices are offered in a compact 4x4 QFN package with Excellent Linearity +65 dBm IP3I 50 impedances for ease of integration into the radio Fast settling time, < 450 ns system. Class 2 JEDEC ESD (> 2kV HBM) Serial Interface 31.5 dB Range COMPETITIVE ADVANTAGE Stable Integral Non-Linearity over temperature Digital step attenuators are used in Receivers and 4x4 mm Thin QFN 24 pin package Transmitters to provide gain control. The F1951 is a 6- 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 F1951 includes DEVICE BLOCK DIAGRAM TM Renesas Glitch-Free 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). Lowest insertion loss for best SNR RF RF 1 2 TM Glitch-Free when transitioning wont damage PA or ADC TM TM Glitch-Free Glitch-Free Extremely accurate with low distortion SPI RSTb DEC Bias APPLICATIONS Base Station 2G, 3G, 4G, TDD radiocards Repeaters and E911 systems SDI SDO Digital Pre-Distortion V CLK CSb DD Point to Point Infrastructure Public Safety Infrastructure WIMAX Receivers and Transmitters ORDERING INFORMATION Military Systems, JTRS radios RFID handheld and portable readers Tape & 0.8 mm height Reel Cable Infrastructure package F1951NBGI8 PART MATRIX Green Freq range Resolution / IL Industrial Part Control Pinout (MHz) Range (dB) (dB) Temp range F1951 100 - 5000 0.50 / 31.5 Serial Only -1.2 HITT F1950 150 - 5000 0.25 / 31.5 Serial Only -1.3 PE F1952 100 4000 0.50 / 15.5 Serial Only -0.9 HITT 2020 Renesas Electronics Corporation 1 Aug 7, 2020 ABSOLUTE MAXIMUM RATINGS V to GND -0.3 V to +5.50V DD D 5:0 , DATA, CLK, CSb, SDO, RSTb -0.3 V to 3.6 V RF Input Power (RF1, RF2) calibration and testing +29 dBm RF Input Power (RF1, RF2) continuous RF operation +23 dBm (Junction Ambient) +50 C/W JA JC (Junction Case) The Case is defined as the exposed paddle +3 C/W Operating Temperature Range (Case Temperature) TC = -40 C to +100C Maximum Junction Temperature 140 C Storage Temperature Range -65 C to +150 C Lead Temperature (soldering, 10s) +260 C 2020 Renesas Electronics Corporation 2 Aug 7, 2020