Datasheet LTC2413 (Analog Devices) - 8

LTC2413
Typical perForMance characTerisTics Noise Histogram (Output Rate = Noise Histogram (Output Rate = Noise Histogram (Output Rate = 22.5Hz, VCC = 5V, VREF = 2.5V) 6.83Hz V 22.5Hz, V CC = 2.7V, VREF = 2.5V) CC = 2.7V, VREF = 2.5V)
12 12 12 10,000 CONSECUTIVE GAUSSIAN 10,000 CONSECUTIVE GAUSSIAN 10,000 CONSECUTIVE GAUSSIAN READINGS DISTRIBUTION READINGS DISTRIBUTION READINGS DISTRIBUTION 10 VCC = 5V m = 0.014ppm 10 VCC = 2.7V m = 0.079ppm 10 VCC = 2.7V m = 0.177ppm VREF = 2.5V σ = 0.292ppm VREF = 2.5V σ = 0.298ppm VREF = 2.5V σ = 0.297ppm VIN = 0V VIN = 0V VIN = 0V 8 REF+ = 2.5V 8 REF+ = 2.5V 8 REF+ = 2.5V REF– = GND REF– = GND REF– = GND 6 IN+ = 1.25V IN+ = 1.25V IN+ = 1.25V IN– = 1.25V 6 IN– = 1.25V 6 IN– = 1.25V FO = 460800Hz FO = GND FO = 460800Hz 4 TA = 25°C 4 TA = 25°C 4 TA = 25°C NUMBER OF READINGS (%) NUMBER OF READINGS (%) NUMBER OF READINGS (%) 2 2 2 0 0 0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 OUTPUT CODE (ppm OF VREF) OUTPUT CODE (ppm OF VREF) OUTPUT CODE (ppm OF VREF) 2413 G10 2413 G11 2413 G12
Long-Term Noise Histogram (Time = 60 Hrs, VCC = 5V, Consecutive ADC Readings vs RMS Noise vs Input Differential VREF = 5V) Time Voltage
12 1.0 0.5 GAUSSIAN DISTRIBUTION m = 0.101837ppm 0.8 VCC = 5V 10 σ = 0.154515ppm V ) REF = 5V 0.6 ) 0.4 REF+ = 5V REF REF– = GND 0.4 REF 8 ADC CONSECUTIVE VINCM = 2.5V READINGS 0.2 0.3 FO = GND VCC = 5V TA = 25°C 6 VREF = 5V 0 VIN = 0V REF+ = 5V –0.2 0.2 4 REF– = GND –0.4 IN+ = 2.5V NUMBER OF READINGS (%) V T IN+ = 2.5V RMS NOISE (ppm OF V IN– = 2.5V ADC READING (ppm OF V –0.6 CC = 5V A = 25°C 0.1 2 V REF+ = 5V IN– = 2.5V F REF = 5V O = GND V REF– = GND T –0.8 IN = 0V A = 25°C FO = GND 0 –1.0 0 –0.8 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8 0 5 10 15 20 25 30 35 40 45 50 55 60 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 OUTPUT CODE (ppm OF VREF) TIME (HOURS) INPUT DIFFERENTIAL VOLTAGE (V) 2413 G13 2413 G14 2413 G15
RMS Noise vs VINCM RMS Noise vs Temperature (TA) RMS Noise vs VCC
850 850 850 V REF+ = 2.5V CC = 5V 825 825 REF+ = 5V 825 REF– = GND REF– = GND VREF = 2.5V IN+ = GND 800 800 IN+ = 2.5V 800 IN– = 2.5V IN– = GND F 775 775 VIN = 0V 775 O = GND V T CC = 5V FO = GND A = 25°C 750 REF+ = 5V 750 750 REF– = GND VREF = 5V RMS NOISE (nV) 725 725 725 IN+ = VINCM RMS NOISE (nV) RMS NOISE (nV) 700 IN– = VINCM 700 700 VIN = 0V 675 FO = GND T 675 675 A = 25°C 650 650 650 –0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 –50 –25 0 25 50 75 100 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 VINCM (V) TEMPERATURE (°C) VCC (V) 2413 G16 2413 G17 2413 G18 2413fa 8 For more information www.linear.com/LTC2413