Datasheet LTC2157-14, LTC2156-14, LTC2155-14 (Analog Devices) - 7

LTC2157-14/ LTC2156-14/LTC2155-14
TYPICAL PERFORMANCE CHARACTERISTICS LTC2157-14: Shorted Input LTC2157-14: SNR vs Input Frequency, LTC2157-14: SFDR vs Input Histogram –1dBFS, 250Msps Frequency, –1dBFS, 250Msps
4000 75 90 3500 70 80 3000 70 65 2500 60 60 50 2000 COUNT 55 40 1500 SNR (dBFS) SFDR (dBFS) 30 50 1000 20 500 45 10 0 40 0 8198 8200 8202 8204 8206 8208 8210 8212 8214 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800 900 1000 OUTPUT CODE INPUT FREQUENCY (MHz) INPUT FREQUENCY (MHz) 21576514 G09 21576514 G10 21576514 G11
LTC2157-14: IVDD vs Sample LTC2157-14: SNR vs Input Level, LTC2157-14: SFDR vs Input Level, Rate, 15MHz Sine Wave Input, fIN = 70MHz, 250Msps fIN = 70MHz, 250Msps –1dBFS
80 300 dBFS 120 70 dBFS 280 60 100 50 80 260 40 (mA) 60 dBc I VDD 30 SFDR (dBFS) 240 SNR (dBc AND dBFS) dBc 40 20 220 10 20 0 0 200 –70 –60 –50 –40 –30 –20 –10 0 –80 –70 –60 –50 –40 –30 –20 –10 0 0 50 100 150 200 250 INPUT LEVEL (dBFS) AMPLITUDE (dBFS) SAMPLE RATE (Msps) 21576514 G13 21576514 G14 21576514 G12
LTC2157-14: IOVDD vs Sample Rate, 15MHz Sine Wave Input, –1dBFS LTC2157-14: Frequency Response
80 –0.5 LVDS CURRENT –1.0 3.5mA 70 –1.5 –2.0 –2.5 60 (mA) –3.0 VDD –3.5 IO 50 –4.0 LVDS CURRENT AMPLITUDE (dBFS) 1.75mA –4.5 40 –5.0 –5.5 30 –6.0 0 50 100 150 200 250 100 1000 SAMPLE RATE (Msps) INPUT FREQUENCY (MHz) 21576514 G15 21576514 G16 21576514fb For more information www.linear.com/LTC2157-14 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Power Requirements Digital Inputs And Outputs Timing Characteristics Timing Diagrams Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Package Description Related Parts