Datasheet LTC2498 (Analog Devices) - 6

LTC2498
typical perForMance characteristics Integral Nonlinearity Integral Nonlinearity Integral Nonlinearity (VCC = 5V, VREF = 5V) (VCC = 5V, VREF = 2.5V) (VCC = 2.7V, VREF = 2.5V)
3 3 3 VCC = 5V VCC = 5V VCC = 2.7V VREF = 5V VREF = 2.5V VREF = 2.5V 2 VIN(CM) = 2.5V 2 VIN(CM) = 1.25V 2 VIN(CM) = 1.25V fO = GND fO = GND fO = GND ) 1 –45°C 1 1 REF 25°C REF –45°C, 25°C, 90°C REF –45°C, 25°C, 90°C 0 0 0 85°C INL (ppm OF V –1 INL (ppm OF V –1 INL (ppm OF V –1 –2 –2 –2 –3 –3 –3 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 –1.25 –0.75 –0.25 0.25 0.75 1.25 –1.25 –0.75 –0.25 0.25 0.75 1.25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 2498 G01 2498 G02 2498 G03
Total Unadjusted Error Total Unadjusted Error Total Unadjusted Error (VCC = 5V, VREF = 5V) (VCC = 5V, VREF = 2.5V) (VCC = 2.7V, VREF = 2.5V)
12 12 12 VCC = 5V VCC = 5V VCC = 2.7V VREF = 5V VREF = 5V 85°C VREF = 2.5V 8 VIN(CM) = 2.5V 8 VIN(CM) = 1.25V 8 VIN(CM) = 1.25V fO = GND 85°C fO = GND 25°C fO = GND 85°C ) 25°C ) 25°C 4 4 4 REF REF REF –45°C 0 –45°C 0 –45°C 0 TUE (ppm OF V –4 TUE (ppm OF V –4 TUE (ppm OF V –4 –8 –8 –8 –12 –12 –12 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 –1.25 –0.75 –0.25 0.25 0.75 1.25 –1.25 –0.75 –0.25 0.25 0.75 1.25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 2498 G04 2498 G05 2498 G06
Noise Histogram (6.8sps) Noise Histogram (7.5sps) Long-Term ADC Readings
14 14 5 10,000 CONSECUTIVE 10,000 CONSECUTIVE VCC = 5V, VREF = 5V, VIN = 0V, VIN(CM) = 2.5V READINGS READINGS 4 T 12 12 RMS = 0.59µV A = 25°C, RMS NOISE = 0.60µV VCC = 5V RMS = 0.60µV VCC = 2.7V AVERAGE = –0.19µV V 3 REF = 5V AVERAGE = –0.69µV VREF = 2.5V 10 VIN = 0V 10 VIN = 0V 2 TA = 25°C TA = 25°C 1 8 8 0 6 6 –1 4 4 ADC READING (µV) –2 NUMBER OF READINGS (%) NUMBER OF READINGS (%) –3 2 2 –4 0 0 –5 –3 –2.4 –1.8 –1.2 –0.6 0 0.6 1.2 1.8 –3 –2.4 –1.8 –1.2 –0.6 0 0.6 1.2 1.8 0 10 20 30 40 50 60 OUTPUT READING (µV) OUTPUT READING (µV) TIME (HOURS) 2498 G07 2498 G08 2498 G09 2498fg 6 For more information www.linear.com/LTC2498 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics (Normal Speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference Digital Inputs and Digital Outputs Power Requirements Digital Inputs and Digital Outputs Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Timing Diagrams Applications Information Package Description Revision History Related Parts