Datasheet LTC2488 (Analog Devices) - 7
| Fabricante | Analog Devices |
| Descripción | 16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation |
| Páginas / Página | 30 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. On-Chip Oscillator Frequency. Offset … |
| Formato / tamaño de archivo | PDF / 399 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS. On-Chip Oscillator Frequency. Offset Error vs VREF. vs Temperature. vs VCC
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LTC2488
TYPICAL PERFORMANCE CHARACTERISTICS On-Chip Oscillator Frequency On-Chip Oscillator Frequency Offset Error vs VREF vs Temperature vs VCC
0.3 310 310 VCC = 5V VREF = 2.5V REF– = GND VIN = 0V ) 0.2 VIN = 0V V 308 308 IN(CM) = GND REF VIN(CM) = GND FO = GND TA = 25°C TA = 25°C 0.1 306 306 0 304 304 –0.1 FREQUENCY (kHz) V FREQUENCY (kHz) CC = 4.1V VREF = 2.5V OFFSET ERROR (ppm OF V 302 –0.2 V 302 IN = 0V VIN(CM) = GND FO = GND –0.3 300 300 0 1 2 3 4 5 –45 –30 –15 0 15 30 45 60 75 90 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VREF (V) TEMPERATURE (°C) VCC (V) 2488 G10 2488 G11 2488 G12
PSRR vs Frequency at VCC PSRR vs Frequency at VCC PSRR vs Frequency at VCC
0 0 0 V V CC = 4.1V DC CC = 4.1V DC ±1.4V VCC = 4.1V DC ±0.7V V V –20 REF = 2.5V –20 REF = 2.5V VREF = 2.5V IN+ = GND IN+ = GND –20 IN+ = GND IN– = GND IN– = GND IN– = GND –40 F –40 F O = GND O = GND –40 FO = GND T T A = 25°C A = 25°C TA = 25°C –60 –60 –60 –80 –80 –80 REJECTION (dB) REJECTION (dB) REJECTION (dB) –100 –100 –100 –120 –120 –120 –140 –140 –140 1 10 100 1k 10k 100k 1M 0 20 40 60 80 100 120 140 160 180 200 220 30600 30650 30700 30750 30800 FREQUENCY AT V FREQUENCY AT V CC (Hz) CC (Hz) FREQUENCY AT VCC (Hz) 2488 G13 2488 G14 2488 G15
Conversion Current Sleep Mode Current Conversion Current vs Temperature vs Temperature vs Output Data Rate
200 2.0 500 FO = GND FO = GND VREF = VCC CS = GND 1.8 CS = VCC 450 IN+ = GND SCK = NC IN– = GND 180 SCK = NC 1.6 SDO = NC SDO = NC 400 SCK = NC SDI = GND VCC = 5V 1.4 SDI = GND SDO = NC 350 SDI = GND 160 1.2 VCC = 5V CS GND 1.0 300 FO = EXT OSC V T CC = 2.7V A = 25°C 140 0.8 250 0.6 VCC = 2.7V V SUPPLY CURRENT (µA) CC = 5V 200 CONVERSION CURRENT (µA) 120 SLEEP MODE CURRENT (µA) 0.4 0.2 150 VCC = 3V 100 0 100 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 0 10 20 30 TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT DATA RATE (READINGS/SEC) 2488 G16 2488 G17 2488 G18 2488fb For more information www.linear.com/LTC2488 7
TYPICAL PERFORMANCE CHARACTERISTICS On-Chip Oscillator Frequency On-Chip Oscillator Frequency Offset Error vs VREF vs Temperature vs VCC
0.3 310 310 VCC = 5V VREF = 2.5V REF– = GND VIN = 0V ) 0.2 VIN = 0V V 308 308 IN(CM) = GND REF VIN(CM) = GND FO = GND TA = 25°C TA = 25°C 0.1 306 306 0 304 304 –0.1 FREQUENCY (kHz) V FREQUENCY (kHz) CC = 4.1V VREF = 2.5V OFFSET ERROR (ppm OF V 302 –0.2 V 302 IN = 0V VIN(CM) = GND FO = GND –0.3 300 300 0 1 2 3 4 5 –45 –30 –15 0 15 30 45 60 75 90 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VREF (V) TEMPERATURE (°C) VCC (V) 2488 G10 2488 G11 2488 G12
PSRR vs Frequency at VCC PSRR vs Frequency at VCC PSRR vs Frequency at VCC
0 0 0 V V CC = 4.1V DC CC = 4.1V DC ±1.4V VCC = 4.1V DC ±0.7V V V –20 REF = 2.5V –20 REF = 2.5V VREF = 2.5V IN+ = GND IN+ = GND –20 IN+ = GND IN– = GND IN– = GND IN– = GND –40 F –40 F O = GND O = GND –40 FO = GND T T A = 25°C A = 25°C TA = 25°C –60 –60 –60 –80 –80 –80 REJECTION (dB) REJECTION (dB) REJECTION (dB) –100 –100 –100 –120 –120 –120 –140 –140 –140 1 10 100 1k 10k 100k 1M 0 20 40 60 80 100 120 140 160 180 200 220 30600 30650 30700 30750 30800 FREQUENCY AT V FREQUENCY AT V CC (Hz) CC (Hz) FREQUENCY AT VCC (Hz) 2488 G13 2488 G14 2488 G15
Conversion Current Sleep Mode Current Conversion Current vs Temperature vs Temperature vs Output Data Rate
200 2.0 500 FO = GND FO = GND VREF = VCC CS = GND 1.8 CS = VCC 450 IN+ = GND SCK = NC IN– = GND 180 SCK = NC 1.6 SDO = NC SDO = NC 400 SCK = NC SDI = GND VCC = 5V 1.4 SDI = GND SDO = NC 350 SDI = GND 160 1.2 VCC = 5V CS GND 1.0 300 FO = EXT OSC V T CC = 2.7V A = 25°C 140 0.8 250 0.6 VCC = 2.7V V SUPPLY CURRENT (µA) CC = 5V 200 CONVERSION CURRENT (µA) 120 SLEEP MODE CURRENT (µA) 0.4 0.2 150 VCC = 3V 100 0 100 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 0 10 20 30 TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT DATA RATE (READINGS/SEC) 2488 G16 2488 G17 2488 G18 2488fb For more information www.linear.com/LTC2488 7