Datasheet LTC1864, LTC1865 (Analog Devices) - 9

LTC1864/LTC1865
TYPICAL PERFORMANCE CHARACTERISTICS Change in Offset Error vs Change in Gain Error vs Reference Voltage Change in Offset vs Temperature Reference Voltage
75 5 20 VCC = 5V VCC = 5V VCC = 5V TA = 25°C 4 VREF = 5V 15 TA = 25°C 3 50 10 2 5 1 25 0 0 –1 –5 –2 0 CHANGE IN OFFSET (LSB) –10 –3 CHANGE IN GAIN ERROR (LSB) CHANGE IN OFFSET ERROR (LSB) –15 –4 –25 –5 –20 0 1 2 3 4 5 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 REFERENCE VOLTAGE (V) TEMPERATURE (°C) REFERENCE VOLTAGE(V) 18645 G10 18645 G11 18645 G12
Change in Gain Error vs Histogram of 4096 Conversions of Temperature a DC Input Voltage 4096 Point FFT Nonaveraged
5 1800 0 VCC = 5V VCC = 5V fS = 203.125kHz 4 VREF = 5V 1600 1534 TA = 25°C fIN = 99.72763kHz V –20 3 REF = 5V VCC = 5V 1400 VREF = 5V 2 1178 –40 T 1200 A = 25°C 1 1000 –60 0 800 729 –1 –80 FREQUENCY 600 AMPLITUDE (dB) –2 516 –100 400 CHANGE IN GAIN ERROR (LSB) –3 –120 –4 200 127 0 0 12 0 0 –5 0 –140 –50 –25 0 25 50 75 100 125 –4 –3 –2 –1 0 1 2 3 4 5 0 20 40 60 80 100 120 TEMPERATURE (°C) CODE FREQUENCY (kHz) 18645 G13 18645 G14 18645 G15
SINAD vs Frequency THD vs Frequency SFDR vs Frequency
100 0 100 90 –10 SNR 90 80 –20 80 70 SINAD –30 70 60 –40 60 50 –50 50 THD (dB) SINAD (dB) 40 –60 SFDR (dB) 40 30 –70 30 V VCC = 5V VCC = 5V 20 CC = 5V –80 V V 20 REF = 5V REF = 5V VREF = 5V T 10 TA = 25°C –90 A = 25°C 10 TA = 25°C V V IN = 0dB IN = 0dB VIN = 0dB 0 –100 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 FIN (kHz) FIN (kHz) FIN (kHz) 18645 G16 18645 G17 18645 G18 18645fb 9