Datasheet LTC2498 (Analog Devices) - 8

LTC2498
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 V –20 REF = 2.5V 308 V IN+ = GND 308 IN(CM) = GND fO = GND IN– = GND TA = 25°C –40 fO = GND T 306 A = 25°C 306 –60 304 –80 304 FREQUENCY (kHz) REJECTION (dB) V FREQUENCY (kHz) CC = 4.1V –100 V 302 REF = 2.5V VIN = 0V 302 V –120 IN(CM) = GND fO = 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) 2498 G19 2498 G20 2498 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 fO = GND V –20 REF = 2.5V VREF = 2.5V CS = GND IN+ = GND –20 IN+ = GND SCK = NC IN– = GND IN– = GND 180 SDO = NC –40 fO = GND –40 fO = GND SDI = GND VCC = 5V TA = 25°C TA = 25°C –60 –60 160 –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) 2498 G22 2498 G23 2498 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 fO = GND VREF = VCC V 1.8 CC = 5V CS = VCC IN+ = GND V 450 REF = 5V 1.6 SCK = NC IN– = GND 2 VIN(CM) = 2.5V SDO = NC SCK = NC f 400 O = GND 1.4 SDI = GND SDO = NC ) SDI = GND 1 1.2 350 REF VCC = 5V CS GND 25°C, 90°C 1.0 300 fO = EXT OSC 0 TA = 25°C 0.8 250 0.6 V V INL (ppm OF V –1 CC = 2.7V SUPPLY CURRENT (µA) CC = 5V 200 SLEEP MODE CURRENT (µA) 0.4 –45°C –2 0.2 150 VCC = 3V 0 100 –3 –45 –30 –15 0 15 30 45 60 75 90 0 10 20 30 –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) 2498 G25 2498 G26 2498 G27 2498fg 8 For more information www.linear.com/LTC2498 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics (Normal Speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference Digital Inputs and Digital Outputs Power Requirements Digital Inputs and Digital Outputs Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Timing Diagrams Applications Information Package Description Revision History Related Parts