Datasheet LTC2481 (Analog Devices) - 6

LTC2481
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 ) 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) 2481 G03 2481 G01 2481 G02
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 = 2.5V 85°C VREF = 2.5V 8 VIN(CM) = 2.5V 8 VIN(CM) = 1.25V 8 VIN(CM) = 1.25V 85°C 25°C 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) 2481 G04 2481 G05 2481 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 GAIN = 256, T 12 RMS = 0.59µV A = 25°C, RMS NOISE = 0.60µV V 12 CC = 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 GAIN = 256 GAIN = 256 µV) 8 TA = 25°C 8 TA = 25°C 1 0 6 6 –1 4 4 ADC READING ( –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) 2481 G07 2481 G08 2481 G09 2481fd 6 For more information www.linear.com/LTC2481 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics (Normal Speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference I2C Digital Inputs and Digital Outputs Power Requirements Timing Characteristics I2C Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Package Description Revision History Typical Application