Datasheet LTC2421, LTC2422 (Analog Devices) - 6

LTC2421/LTC2422
W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Noise vs Reference Voltage Offset Error vs VCC RMS Noise vs VCC
60 10 10.0 VCC = 5V VREF = 2.5V VREF = 2.5V TA = 25°C TA = 25°C TA = 25°C 50 ) 5 7.5 REF 40 30 0 5.0 20 RMS NOISE (ppm) OFFSET ERROR (ppm) RMS NOISE (ppm OF V –5 2.5 10 0 –10 0 0 1 2 3 4 5 2.7 3.2 3.7 4.2 4.7 5.2 5.5 2.7 3.2 3.7 4.2 4.7 5.2 5.5 REFERENCE VOLTAGE (V) VCC (V) VCC (V) 24212 G10 24212 G11 24212 G12
Noise Histogram RMS Noise vs Code Out Offset Error vs Temperature
350 5.00 10 VCC = 5 VCC = 5V VCC = 5V V VREF = 5V VREF = 5V 300 REF = 5 VIN = 0 VIN = 0.3V TO 5.3V VIN = 0V 3.75 TA = 25°C 5 250 200 2.50 0 150 RMS NOISE (ppm) 100 NUMBER OF READINGS OFFSET ERROR (ppm) 1.25 –5 50 0 0 –10 –2 0 2 4 6 0 7FFFF FFFFF –55 –30 –5 20 45 70 95 120 OUTPUT CODE (ppm) CODE OUT (HEX) TEMPERATURE (°C) 24212 G13 24212 G14 24212 G15
Full-Scale Error Full-Scale Error vs Temperature vs Reference Voltage Full-Scale Error vs VCC
10 0 10 VCC = 5V VREF = 2.5V VREF = 5V VIN = 2.5V VIN = 5V –25 TA = 25°C 5 5 –50 0 –75 0 –100 –5 –5 FULL-SCALE ERROR (ppm) FULL-SCALE ERROR (ppm) FULL-SCALE ERROR (ppm) –125 VCC = 5V VIN = VREF –10 –150 –10 –55 –30 –5 20 45 70 95 120 0 1 2 3 4 5 2.7 3.2 3.7 4.2 4.7 5.2 5.5 TEMPERATURE (°C) REFERENCE VOLTAGE (V) VCC (V) 24212 G16 24212 G17 24212 G18 24212f 6