Datasheet LTC2485 (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | 24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation and I2C Interface |
| 页数 / 页 | 40 / 8 — Typical perForMance characTerisTics. On-Chip Oscillator Frequency. vs … |
| 文件格式/大小 | PDF / 646 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics. On-Chip Oscillator Frequency. vs Temperature. vs VCC. PSRR vs Frequency at VCC
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LTC2485
Typical perForMance characTerisTics On-Chip Oscillator Frequency On-Chip Oscillator Frequency vs Temperature vs VCC PSRR vs Frequency at VCC
310 310 0 VREF = 2.5V VCC = 4.1V DC VIN = 0V VREF = 2.5V V –20 IN+ = GND 308 308 IN(CM) = GND IN– = GND –40 TA = 25°C 306 306 –60 304 304 –80 FREQUENCY (kHz) FREQUENCY (kHz) REJECTION (dB) V –100 CC = 4.1V 302 VREF = 2.5V 302 VIN = 0V –120 VIN(CM) = GND 300 300 –140 –45 –30 –15 0 15 30 45 60 75 90 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1 10 100 1k 10k 100k 1M TEMPERATURE (°C) VCC (V) FREQUENCY AT VCC (Hz) 2485 G19 2485 G20 2485 G21
Conversion Current PSRR vs Frequency at VCC PSRR vs Frequency at VCC vs Temperature
0 0 200 VCC = 4.1V DC ±1.4V VCC = 4.1V DC ±0.7V V V –20 REF = 2.5V REF = 2.5V IN+ = GND –20 IN+ = GND IN– = GND IN– = GND 180 –40 TA = 25°C –40 TA = 25°C VCC = 5V 160 –60 –60 –80 –80 VCC = 2.7V 140 REJECTION (dB) REJECTION (dB) –100 –100 CONVERSION CURRENT (µA) 120 –120 –120 –140 –140 100 0 20 40 60 80 100 120 140 160 180 200 220 30600 30650 30700 30750 30800 –45 –30 –15 0 15 30 45 60 75 90 FREQUENCY AT VCC (Hz) FREQUENCY AT VCC (Hz) TEMPERATURE (°C) 2485 G22 2485 G23 2485 G24
Sleep Mode Current Conversion Current Integral Nonlinearity (2x Speed vs Temperature vs Output Data Rate Mode; VCC = 5V, VREF = 5V)
2.0 500 3 VREF = VCC VCC = 5V 1.8 450 IN+ = GND VREF = 5V 2 V 1.6 IN– = GND IN(CM) = 2.5V 400 CA0/f0 = EXT OSC 1.4 TA = 25°C ) 1 REF 1.2 350 VCC = 5V 25°C, 90°C 1.0 300 0 0.8 250 –1 0.6 V V INL (ppm OF V CC = 2.7V SUPPLY CURRENT (µA) CC = 5V 200 SLEEP MODE CURRENT (µA) –45°C 0.4 –2 0.2 150 VCC = 3V 0 100 –3 –45 –30 –15 0 15 30 45 60 75 90 0 10 20 25 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 TEMPERATURE (°C) OUTPUT DATA RATE (READINGS/SEC) INPUT VOLTAGE (V) 2485 G25 2485 G26 2485 G27 2485fd 8 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 On-Chip Oscillator Frequency On-Chip Oscillator Frequency vs Temperature vs VCC PSRR vs Frequency at VCC
310 310 0 VREF = 2.5V VCC = 4.1V DC VIN = 0V VREF = 2.5V V –20 IN+ = GND 308 308 IN(CM) = GND IN– = GND –40 TA = 25°C 306 306 –60 304 304 –80 FREQUENCY (kHz) FREQUENCY (kHz) REJECTION (dB) V –100 CC = 4.1V 302 VREF = 2.5V 302 VIN = 0V –120 VIN(CM) = GND 300 300 –140 –45 –30 –15 0 15 30 45 60 75 90 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1 10 100 1k 10k 100k 1M TEMPERATURE (°C) VCC (V) FREQUENCY AT VCC (Hz) 2485 G19 2485 G20 2485 G21
Conversion Current PSRR vs Frequency at VCC PSRR vs Frequency at VCC vs Temperature
0 0 200 VCC = 4.1V DC ±1.4V VCC = 4.1V DC ±0.7V V V –20 REF = 2.5V REF = 2.5V IN+ = GND –20 IN+ = GND IN– = GND IN– = GND 180 –40 TA = 25°C –40 TA = 25°C VCC = 5V 160 –60 –60 –80 –80 VCC = 2.7V 140 REJECTION (dB) REJECTION (dB) –100 –100 CONVERSION CURRENT (µA) 120 –120 –120 –140 –140 100 0 20 40 60 80 100 120 140 160 180 200 220 30600 30650 30700 30750 30800 –45 –30 –15 0 15 30 45 60 75 90 FREQUENCY AT VCC (Hz) FREQUENCY AT VCC (Hz) TEMPERATURE (°C) 2485 G22 2485 G23 2485 G24
Sleep Mode Current Conversion Current Integral Nonlinearity (2x Speed vs Temperature vs Output Data Rate Mode; VCC = 5V, VREF = 5V)
2.0 500 3 VREF = VCC VCC = 5V 1.8 450 IN+ = GND VREF = 5V 2 V 1.6 IN– = GND IN(CM) = 2.5V 400 CA0/f0 = EXT OSC 1.4 TA = 25°C ) 1 REF 1.2 350 VCC = 5V 25°C, 90°C 1.0 300 0 0.8 250 –1 0.6 V V INL (ppm OF V CC = 2.7V SUPPLY CURRENT (µA) CC = 5V 200 SLEEP MODE CURRENT (µA) –45°C 0.4 –2 0.2 150 VCC = 3V 0 100 –3 –45 –30 –15 0 15 30 45 60 75 90 0 10 20 25 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 TEMPERATURE (°C) OUTPUT DATA RATE (READINGS/SEC) INPUT VOLTAGE (V) 2485 G25 2485 G26 2485 G27 2485fd 8 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