Datasheet LTC6373 (Analog Devices) - 32

LTC6373
APPLICATIONS INFORMATION
1.3K 4.096V 5V 2.5V 1.8V +15V (1.575V)/G 1.575V +5V used to 4.548V 5V REF AVDD1 AVDD2 IOVDD + set G V (-1.575V)/G + OUT -1.575V 1K 0.452V 82.5 - V A2 A1 + A0 - 100pF VOCM LTC6373 2.5V ADA4945-1 V AD7768-1 -IN 100pF + - DGND + (1.575V)/G 1.575V CAP 1K 4.548V 82.5 - V V +IN VCM AVSS DGND (-1.575V)/G -1.575V -15V 0.452V 180pF 1.3K 2.5V 6373 F20
Figure 20. LTC6373 (PGIA) + ADA4945-1 (ADC Driver) + AD7768-1 (ADC) Signal Chain SNR for LTC6373+ADA4945–1+ THD for LTC6373+ADA4945–1+ AD7768–1 Signal Chain AD7768–1 Signal Chain
110 –100 108 –105 106 104 –110 102 100 –115 SNR (dB) 98 THD (dB) –120 96 94 –125 92 fIN = 1kHz fIN = 1kHz 90 –130 0.25 0.5 1 2 4 8 16 0.25 0.5 1 2 4 8 16 LTC6373 GAIN SETTING (G) LTC6373 GAIN SETTING (G) 6373 F21 6373 F22
Figure 21. SNR for LTC6373 + Figure 22. THD for LTC6373 + ADA4945-1 + AD7768-1 Signal Chain ADA4945-1 + AD7768-1 Signal Chain
Rev. 0 32 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Applications Information Package Description Typical Application Related Parts