Datasheet LTC2487 (Analog Devices) - 9

LTC2487
TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (2x Speed Integral Nonlinearity (2x Speed Noise Histogram Mode; VCC = 5V, VREF = 2.5V) Mode; VCC = 2.7V, VREF = 2.5V) (2x Speed Mode)
3 3 16 VCC = 5V VCC = 2.7V 10,000 CONSECUTIVE RMS = 0.85µV VREF = 2.5V VREF = 2.5V READINGS AVERAGE = 0.184µV 2 14 VIN(CM) = 1.25V 2 VIN(CM) = 1.25V VCC = 5V fO = GND fO = GND 12 VREF = 5V ) V 1 1 IN = 0V REF T 85°C REF 85°C 10 A = 25°C GAIN = 128 0 0 8 6 INL (ppm OF V –1 –45°C, 25°C INL (ppm OF V –1 –45°C, 25°C NUMBER OF READINGS (%) 4 –2 –2 2 –3 –3 0 –1.25 –0.75 –0.25 0.25 0.75 1.25 –1.25 –0.75 –0.25 0.25 0.75 1.25 179 181.4 183.8 186.2 188.6 INPUT VOLTAGE (V) INPUT VOLTAGE (V) OUTPUT READING (µV) 2487 G28 2487 G29 2487 G30
RMS Noise vs VREF Offset Error vs VIN(CM) Offset Error vs Temperature (2x Speed Mode) (2x Speed Mode) (2x Speed Mode)
1.0 200 240 V V 198 CC = 5V CC = 5V VREF = 5V 230 VREF = 5V 0.8 196 VIN = 0V VIN = 0V fO = GND 220 VIN(CM) = GND 194 TA = 25°C fO = GND 0.6 192 210 190 200 0.4 188 RMS NOISE (µV) V 190 CC = 5V V OFFSET ERROR (µV) IN = 0V OFFSET ERROR (µV) 186 180 0.2 VIN(CM) = GND 184 fO = GND T 170 A = 25°C 182 GAIN = 128 0 180 160 0 1 2 3 4 5 –1 0 1 2 3 4 5 6 –45 –30 –15 0 15 30 45 60 75 90 VREF (V) VIN(CM) (V) TEMPERATURE (°C) 2487 G31 2487 G32 2487 G33
Offset Error vs VCC Offset Error vs VREF (2x Speed Mode) (2x Speed Mode)
250 240 VREF = 2.5V VCC = 5V VIN = 0V 230 VIN = 0V 200 VIN(CM) = GND VIN(CM) = GND fO = GND 220 fO = GND TA = 25°C TA = 25°C 150 210 200 100 190 OFFSET ERROR (µV) OFFSET ERROR (µV) 180 50 170 0 160 2 2.5 3 3.5 4 4.5 5 5.5 0 1 2 3 4 5 VCC (V) VREF (V) 2487 G34 2487 G35 2487fg For more information www.linear.com/LTC2487 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics (Normal Speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference I2C Inputs and Digital Outputs Power Requirements Digital Inputs and Digital Outputs I2C Timing Characteristics Typical Performance Characteristics Functional Block Diagram Applications Information Package Description Revision History Typical Application Related Parts