QPB8857 75 28dB CATV Doubler Amplifier 47 1218MHz Product Overview The QPB8857 is a GaAs pHEMT/MESFET 75-ohm Doubler RF amplifier IC featuring over 28dB of flat gain and low noise. This IC is designed to support DOCSIS 3.1 applications up to 1218MHz using a single 24V supply. The QPB8857 offers low noise and low distortion at high efficiency consuming only 10.5W in a 5x7 QFN package. Its compact size and low jc enable integration that is ideally suited for hybrid 40 pin 5x7 QFN Package module or an alternative to hybrid module applications. Functional Block Diagram Key Features High Gain: 28dB 1218MHz Adjustable Bias RF +24V RC Filter V I LIN DD CTRL 47 - 1218 MHz BW IDD I DD 57dBmV/ch virtual 1.2GHz, at 19dB tilt RF IN RF OUT 75 75 Low Noise: 4.5dB QPB8857 Excellent Composite Distortion pHEMT / MESFET device technologies IDD I DD EP Compact Size: 40P 5x7 QFN RC Filter +24V RF Power Consumption (24V, 440mA 10.5W) Applications DOCSIS 3.1 Broadband CATV hybrid modules Head End CMTS Equipment 75-ohm amplifiers Ordering Information Part No. Description QPB8857SB Sample bag with 5 pieces QPB8857SR 7 Reel with 100 pieces QPB8857TR13 13 Reel with 2500 pieces QPB8857EVB 471218MHz PCBA Data Sheet Rev. G, July 27, 2021 - 1 of 13 - www.qorvo.com Subject to change without notice All rights reserved QPB8857 75 28dB CATV Doubler Amplifier 47 1218MHz Absolute Maximum Ratings Parameter Rating Supply Voltage (VDD) +30V (5min) Supply Current (IDD) 570mA Maximum Input Level (single tone) +70dBmV Operating Temperature Range -40 to +90C Storage Temperature Range 65 to +150C Maximum Junction Temperature +150C Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Electrical Specifications 24V (1) Parameter Condition Min Typ Max Unit Supply Voltage (V ) 24 V DD Supply Current (I ) V total current 440 mA DD DD Frequency Range 50 1218 MHz 2 Gain 1218MHz 28 dB Gain Flatness Max. deviation from line using least squares fit from 47 0.5 dB to 1218 MHz Gain Slope Gain(1218MHz) - Gain(50MHz) 1.0 dB Reverse Isolation -42 dB Input Return Loss 18 dB Output Return Loss 18 dB Noise Figure 4.5 dB CSO 80 NTSC + 111 QAM (-6dB offset), 57dBmV/ch out, -81 dBc 19dB tilt CTB -83 dBc CCN 60 dB OIP2 Low band: 225MHz, 275.5MHz, 16dBm/tone 92 dBm High band: 1100MHz, 1150.5MHz, 16dBm/tone 88 dBm OIP3 Low band: 225MHz, 275.5MHz, 16dBm/tone 53 dBm High band: 1100MHz, 1150.5MHz, 16dBm/tone 48 dBm Output P1dB 1218 MHz 31 dBm Thermal Resistance 6 C/W JB (Junction to backside of QFN) Notes: 1. Typical performance at these conditions: Temp = +25C, V = +24V, 75 system, Full band unless otherwise noted DD Data Sheet Rev. G, July 27, 2021 - 2 of 13 - www.qorvo.com Subject to change without notice All rights reserved