Datasheet LTC2494 (Analog Devices) - 8

LTC2494
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 fO = GND IN– = GND TA = 25°C –40 fO = GND TA = 25°C 306 306 –60 304 304 –80 FREQUENCY (kHz) REJECTION (dB) V FREQUENCY (kHz) CC = 4.1V –100 V 302 REF = 2.5V V 302 IN = 0V 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) 2494 G19 2494 G20 2494 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 V –20 REF = 2.5V REF = 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) 2494 G22 2494 G23 2494 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 V VCC = 5V 1.8 REF = VCC CS = VCC 450 IN+ = GND VREF = 5V 2 1.6 SCK = NC IN– = GND VIN(CM) = 2.5V SDO = NC 400 SCK = NC fO = GND 1.4 SDI = GND SDO = NC ) SDI = GND 1 1.2 REF V 350 CC = 5V CS GND 25°C, 85°C 1.0 300 fO = EXT OSC 0 TA = 25°C 0.8 Y CURRENT (µA) 250 0.6 –1 V INL (ppm OF V CC = 2.7V V SUPPL CC = 5V SLEEP MODE CURRENT (µA) 0.4 200 –45°C –2 0.2 150 VCC = 3V 0 –3 –45 –30 –15 0 15 30 45 60 75 90 100 0 10 20 30 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5 TEMPERATURE (°C) INPUT VOLTAGE (V) OUTPUT DATA RATE (READINGS/SEC) 2494 G25 2494 G27 2494 G26 2494fe 8 For more information www.linear.com/LTC2494