Datasheet LTC6419 (Analog Devices) - 21

LTC6419
TYPICAL APPLICATIONS I/Q Demodulator Post-Amplifier with DC-Coupling and Level Shifting
C5 1.3pF 5V DC LEVEL DC LEVEL DIFF OUTPUT Z 3.4V 1.25V LT5575 130Ω| |2.5pF 5V 5V R5 620Ω DC LEVEL 5pF 5pF 3.9V 5V 65Ω 65Ω –8.9dBm R1 R3 I 3.4dBm 227mV 75Ω 75Ω P-P + 936mV – P-P –OUT RF IN 1900MHz C3 R2 R4 LTC6419 –10dBm 12pF 75Ω 75Ω CHANNEL A 200mV – + P-P +OUT 5V 5V C1 C2 LO 10pF 10pF 1920MHz V 0dBm OCM 5pF 5pF 1.25V 65Ω 65Ω Q R6 620Ω IDENTICAL Q CHANNEL C4 (CONNECTS TO LTC6419 CHANNEL B) 1.3pF 6419 TA02 GAIN: 1.1dB GAIN: 12.3dB
Single-Ended to Differential Conversion Using LTC6419 and 50MHz Lowpass Filter (Only One Channel Shown)
3.3V 0.8pF 1.8V 0.1µF 1.8V 150Ω 474Ω INPUT C5 B6 50Ω 220nH 270nH 66.5Ω V+ V DD DD V REF +IN –OUT SENSE OV 68pF 82pF 100Ω 100Ω + B2 A + IN1 O1A+ E8 1/2 LTC6419 VOCM 7.5pF B1 A – IN1 O1A– E7 –IN 68pF 82pF 100pF – +OUT 100Ω 100Ω DCO+ G7 50Ω 220nH 270nH DCO– G8 B3 150Ω 474Ω SHDN VCM12 FR+ H8 C2 A + IN2 LTM9011-14 0.8pF FR– H7 49.9Ω 66.5Ω C1 A – (14-BIT, 125Msps IN2 F2 OCTAL ADCs) A + IN3 GND F1 A – IN3 F3 VCM34 G2 A + IN4 G1 A – IN4 •  •  • N1 A + IN8 N2 + – A – IN8 CLK CLK 6419 TA03 P5 P6 6419fa For more information www.linear.com/LTC6419 21 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Applications Information Typical Applications Typical Applications Related Parts