Datasheet LTC2157-12, LTC2156-12, LTC2155-12 (Analog Devices) - 9

LTC2157-12/ LTC2156-12/LTC2155-12
TYPICAL PERFORMANCE CHARACTERISTICS LTC2157-12: 32K Point 2-Tone LTC2157-12: 32K Point FFT, LTC2157-12: 32K Point FFT, FFT, fIN = 71.0MHz and 69.0MHz, fIN = 567MHz, –1dBFS, 250Msps fIN = 907MHz, –1dBFS, 250Msps 250Msps
0 0 0 –20 –20 –20 –40 –40 –40 –60 –60 –60 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 –100 –100 –100 –120 –120 –120 0 20 40 60 80 100 120 0 20 40 60 80 100 120 0 20 40 60 80 100 120 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 21576512 G10 21576512 G27 21576512 G11
LTC2157-12: LTC2157-12: IOVDD vs Sample Rate, LTC2157-12: IVDD vs Sample Rate, Shorted Input Histogram 15MHz Sine Wave Input, –1dBFS 15MHz Sine Wave Input, –1dBFS
20000 80 300 18000 16000 70 280 LVDS CURRENT 3.5mA 14000 60 12000 260 10000 (mA) (mA) COUNT 50 8000 I OVDD I VDD 240 6000 40 LVDS CURRENT 1.75mA 4000 220 2000 30 0 200 2048 2052 2056 0 50 100 150 200 250 0 50 100 150 200 250 OUTPUT CODE SAMPLE RATE (Msps) SAMPLE RATE (Msps) 21576512 G12 21576512 G13 21576512 G14
LTC2157-12: SFDR vs Input LTC2157-12: SFDR vs Input Level, LTC2157-12: SNR vs Input Level, Frequency, –1dBFS, 1.5V Range, fIN = 70MHz, 1.5V Range, 250Msps fIN = 70MHz, 1.5V Range, 250Msps 250Msps
120 70 90 dBFS dBFS 60 80 100 70 50 80 60 dBc 40 50 60 dBc 40 SFDR (dBFS) 30 SFDR (dBFS) 40 SNR (dBc AND dBFS) 30 20 20 20 10 10 0 0 0 –90 –80 –70 –60 –50 –40 –30 –20 –10 0 –70 –60 –50 –40 –30 –20 –10 0 0 100 200 300 400 500 600 700 800 900 1000 AMPLITUDE (dBFS) INPUT LEVEL (dBFS) INPUT FREQUENCY (MHz) 21576512 G16 21576512 G15 21576512 G17 21576512fb For more information www.linear.com/LTC2157-12 9 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 Related Parts