Datasheet LTC1864L, LTC1865L (Analog Devices) - 6

LTC1864L/LTC1865L
W U TYPICAL PERFOR A CE CHARACTERISTICS Change in Offset vs Change in Gain Error vs Reference Voltage Change in Offset vs Temperature Reference Voltage
20 5 5 fS = 150kHz VCC = 2.7V fS = 150kHz 4 4 15 TA = 25°C VREF = 2.5V TA = 25°C VCC = 3.6V V 3 3 CC = 3.6V 10 2 2 5 1 1 0 0 0 –1 –1 –5 –2 –2 CHANGE IN OFFSET (LSB) –10 CHANGE IN OFFSET (LSB) –3 GHANGE IN GAIN ERROR (LSB) –3 –15 –4 –4 –20 –5 –5 0 1 2 3 4 –50 –25 0 25 50 75 100 125 0 1 2 3 4 REFERENCE VOLTAGE (V) TEMPERATURE (°C) REFERENCE VOLTAGE (V) 1864L/65L G10 1864L/65L G11 1864L/65L G12
Change in Gain Error vs Histogram of 4096 Conversions Temperature of a DC Input Voltage 4096 Point FFT Nonaveraged
5 1200 0 V f CC = 2.7V S = 125kHz 4 –10 V 1040 T REF = 2.5V A = 25°C 1000 –20 V 3 CC = 3V –30 VIN = 0.946045kHz 2 –40 VREF = 3V 800 1 689 –50 648 –60 0 600 576 –70 –1 FREQUENCY 407 –80 400 AMPLITUDE (dB) –2 –90 291 –100 CHANGE IN GAIN ERROR (LSB) –3 200 169 152 –110 –4 52 45 –120 0 7 20 0 0 –5 0 –130 –50 –25 0 25 50 75 100 125 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 0 5 10 15 20 25 30 35 40 45 50 55 60 65 TEMPERATURE (°C) CODE INPUT FREQUENCY (kHz) 1864L/65L G13 1864L/65L G14 1864L/65L G15
SINAD vs Input Frequency THD vs Input Frequency SFDR vs Input Frequency
100 0 100 fS = 125kHz 90 –10 TA = 25°C 90 SNR V 80 –20 CC = 3V 80 VIN = 0dB 70 –30 VREF = 3V 70 SINAD 60 –40 60 50 –50 50 THD (dB) SINAD (dB) 40 –60 SFDR (dB) 40 30 fS = 125kHz –70 30 fS = 125kHz TA = 25°C TA = 25°C 20 –80 V 20 CC = 3V VCC = 3V 10 VIN = 0dB –90 V 10 IN = 0dB VREF = 3V VREF = 3V 0 –100 0 1 10 100 1 10 100 1 10 100 INPUT FREQUENCY (kHz) INPUT FREQUENCY (kHz) INPUT FREQUENCY (kHz) 1864L/65L G16 1864L/65L G17 1864L/65L G18 sn18645L 18645Lfs 6