Datasheet LTC2485 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | 24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation and I2C Interface |
| Seiten / Seite | 40 / 6 — Typical perForMance characTerisTics. Integral Nonlinearity. (VCC = 5V, … |
| Dateiformat / Größe | PDF / 646 Kb |
| Dokumentensprache | Englisch |
Typical perForMance characTerisTics. Integral Nonlinearity. (VCC = 5V, VREF = 5V). (VCC = 5V, VREF = 2.5V)
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LTC2485
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) 2485 G03 2485 G01 2485 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) 2485 G04 2485 G05 2485 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 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 TA = 25°C TA = 25°C 8 8 1 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) 2485 G07 2485 G08 2485 G09 2485fd 6 For more information www.linear.com/LTC2485 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 Related Parts
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) 2485 G03 2485 G01 2485 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) 2485 G04 2485 G05 2485 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 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 TA = 25°C TA = 25°C 8 8 1 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) 2485 G07 2485 G08 2485 G09 2485fd 6 For more information www.linear.com/LTC2485 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 Related Parts