Datasheet LTC2481 (Analog Devices) - 7

LTC2481
Typical perForMance characTerisTics RMS Noise vs Input Differential Voltage RMS Noise vs VIN(CM) RMS Noise vs Temperature (TA)
1.0 1.0 1.0 VCC = 5V VCC = 5V VCC = 5V VREF = 5V VREF = 5V VREF = 5V 0.9 V 0.9 VIN = 0V 0.9 V ) IN(CM) = 2.5V IN = 0V TA = 25°C VIN(CM) = GND VIN(CM) = GND REF GAIN = 256 GAIN = 256 0.8 0.8 TA = 25°C 0.8 0.7 0.7 0.7 0.6 RMS NOISE (µV) 0.6 RMS NOISE (µV) 0.6 RMS NOISE (ppm OF V 0.5 0.5 0.5 0.4 0.4 0.4 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 –1 0 1 2 3 4 5 6 –45 –30 –15 0 15 30 45 60 75 90 INPUT DIFFERENTIAL VOLTAGE (V) VIN(CM) (V) TEMPERATURE (°C) 2481 G10 2481 G11 2481 G12
RMS Noise vs VCC RMS Noise vs VREF Offset Error vs VIN(CM)
1.0 1.0 0.3 VREF = 2.5V VCC = 5V VCC = 5V VIN = 0V VIN = 0V VREF = 5V 0.9 VIN(CM) = GND 0.9 VIN(CM) = GND ) 0.2 VIN = 0V GAIN = 256 GAIN = 256 REF TA = 25°C T TA = 25°C 0.8 A = 25°C 0.8 0.1 0.7 0.7 0 RMS NOISE (µV) 0.6 RMS NOISE (µV) 0.6 –0.1 0.5 0.5 OFFSET ERROR (ppm OF V –0.2 0.4 0.4 –0.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 0 1 2 3 4 5 –1 0 1 2 3 4 5 6 VCC (V) VREF (V) VIN(CM) (V) 2481 G13 2481 G14 2481 G15
Offset Error vs Temperature Offset Error vs VCC Offset Error vs VREF
0.3 0.3 0.3 VCC = 5V REF+ = 2.5V VCC = 5V VREF = 5V REF– = GND REF– = GND ) 0.2 VIN = 0V ) 0.2 VIN = 0V ) 0.2 VIN = 0V REF VIN(CM) = GND REF VIN(CM) = GND REF VIN(CM) = GND T T 0.1 0.1 A = 25°C A = 25°C 0.1 0 0 0 –0.1 –0.1 –0.1 OFFSET ERROR (ppm OF V –0.2 OFFSET ERROR (ppm OF V –0.2 OFFSET ERROR (ppm OF V –0.2 –0.3 –0.3 –0.3 –45 –30 –15 0 15 30 45 60 75 90 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 0 1 2 3 4 5 TEMPERATURE (°C) VCC (V) VREF (V) 2481 G16 2481 G17 2481 G18 2481fd For more information www.linear.com/LTC2481 7 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