Datasheet LTC2440 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | 24-Bit High Speed Differential ∆∑ ADC with Selectable Speed/Resolution |
| 页数 / 页 | 30 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Negative Full-Scale Error. Positive … |
| 文件格式/大小 | PDF / 436 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Negative Full-Scale Error. Positive Full-Scale Error. vs Temperature. Offset Error vs VCC
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LTC2440
TYPICAL PERFORMANCE CHARACTERISTICS Negative Full-Scale Error Positive Full-Scale Error vs Temperature vs Temperature Offset Error vs VCC
20 20 5.0 VCC = 4.5V VCC = 5.5V, 5V VREF = 2.5V OSR = 32768 ) + 15 VREF = 4.5V V ) V = 2.5V f + REF = 5V + 15 REF O = GND REF V – REF = 4.5V V = 5V REF ) V = GND T – REF– REF + – A = 25°C 10 VREF = GND VREF = GND 10 REF 2.5 VIN = VIN = GND 4.5V VINCM = 2.25V VINCM = 2.5V 5.5V 5 OSR = 32768 OSR = 32768 5 fO = GND fO = GND 0 0 0 5.5V VCC = 4.5V VCC = 5.5V, 5V –5 –5 5V VREF = 4.5V VREF = 5V 5V 4.5V V + + REF = 4.5V VREF = 5V –10 –10 V – – REF = GND VREF = GND –2.5 V V OFFSET ERROR (ppm OF V FULL-SCALE ERROR (ppm OF V INCM = 2.25V INCM = 2.5V –15 FULL-SCALE ERROR (ppm OF V –15 OSR = 32768 OSR = 32768 fO = GND fO = GND –20 –20 –5.0 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 4.5 4.7 4.9 5.1 5.3 5.5 TEMPERATURE (°C) TEMPERATURE (°C) VCC (V) 2440 G19 2440 G20 2440 G21
Offset Error vs Conversion Rate Offset Error vs VINCM
5.0 5.0 V + – CC = 5V VIN = VIN = GND V + – CC = 5V VIN = VIN = VINCM VREF = 5V fO = GND VREF = 5V OSR = 32768 ) V + REF = 5V T ) V + = 5V f – A = 25°C REF O = GND REF 2.5 VREF = GND – REF 2.5 VREF = GND TA = 25°C 0 0 –2.5 –2.5 OFFSET ERROR (ppm OF V OFFSET ERROR (ppm OF V –5.0 –5.0 0 500 1000 1500 2000 2500 3000 3500 0 1 2 3 4 5 CONVERSION RATE (Hz) VINCM (V) 2440 G22 2440 G23
RMS Noise vs Temperature Offset Error vs Temperature
3.5 5.0 3.0 V 2.5 CC = 4.5V 2.5 VCC = 5V VCC = 5V VCC = 5.5V VCC = 4.5V VCC = 5.5V 2.0 0 VCC = 4.5V VCC = 5.5V, 5V VCC = 4.5V VCC = 5.5V, 5V RMS NOISE (µV) 1.5 VREF = 2.5V VREF = 5V VREF = 2.5V VREF = 5V V + + OFFSET ERROR (µV) + + REF = 2.5V VREF = 5V VREF = 2.5V VREF = 5V V – – –2.5 – – REF = GND VREF = GND VREF = GND VREF = GND 1.0 V + – + – + – + – IN = VIN = GND VIN = VIN = GND VIN = VIN = GND VIN = VIN = GND OSR = 256 OSR = 256 OSR = 256 OSR = 256 f f f f 0.5 O = GND O = GND –5.0 O = GND O = GND –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 TEMPERATURE (°C) TEMPERATURE (°C) 2440 G24 2440 G25 2440fe For more information www.linear.com/LTC2440 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Negative Full-Scale Error Positive Full-Scale Error vs Temperature vs Temperature Offset Error vs VCC
20 20 5.0 VCC = 4.5V VCC = 5.5V, 5V VREF = 2.5V OSR = 32768 ) + 15 VREF = 4.5V V ) V = 2.5V f + REF = 5V + 15 REF O = GND REF V – REF = 4.5V V = 5V REF ) V = GND T – REF– REF + – A = 25°C 10 VREF = GND VREF = GND 10 REF 2.5 VIN = VIN = GND 4.5V VINCM = 2.25V VINCM = 2.5V 5.5V 5 OSR = 32768 OSR = 32768 5 fO = GND fO = GND 0 0 0 5.5V VCC = 4.5V VCC = 5.5V, 5V –5 –5 5V VREF = 4.5V VREF = 5V 5V 4.5V V + + REF = 4.5V VREF = 5V –10 –10 V – – REF = GND VREF = GND –2.5 V V OFFSET ERROR (ppm OF V FULL-SCALE ERROR (ppm OF V INCM = 2.25V INCM = 2.5V –15 FULL-SCALE ERROR (ppm OF V –15 OSR = 32768 OSR = 32768 fO = GND fO = GND –20 –20 –5.0 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 4.5 4.7 4.9 5.1 5.3 5.5 TEMPERATURE (°C) TEMPERATURE (°C) VCC (V) 2440 G19 2440 G20 2440 G21
Offset Error vs Conversion Rate Offset Error vs VINCM
5.0 5.0 V + – CC = 5V VIN = VIN = GND V + – CC = 5V VIN = VIN = VINCM VREF = 5V fO = GND VREF = 5V OSR = 32768 ) V + REF = 5V T ) V + = 5V f – A = 25°C REF O = GND REF 2.5 VREF = GND – REF 2.5 VREF = GND TA = 25°C 0 0 –2.5 –2.5 OFFSET ERROR (ppm OF V OFFSET ERROR (ppm OF V –5.0 –5.0 0 500 1000 1500 2000 2500 3000 3500 0 1 2 3 4 5 CONVERSION RATE (Hz) VINCM (V) 2440 G22 2440 G23
RMS Noise vs Temperature Offset Error vs Temperature
3.5 5.0 3.0 V 2.5 CC = 4.5V 2.5 VCC = 5V VCC = 5V VCC = 5.5V VCC = 4.5V VCC = 5.5V 2.0 0 VCC = 4.5V VCC = 5.5V, 5V VCC = 4.5V VCC = 5.5V, 5V RMS NOISE (µV) 1.5 VREF = 2.5V VREF = 5V VREF = 2.5V VREF = 5V V + + OFFSET ERROR (µV) + + REF = 2.5V VREF = 5V VREF = 2.5V VREF = 5V V – – –2.5 – – REF = GND VREF = GND VREF = GND VREF = GND 1.0 V + – + – + – + – IN = VIN = GND VIN = VIN = GND VIN = VIN = GND VIN = VIN = GND OSR = 256 OSR = 256 OSR = 256 OSR = 256 f f f f 0.5 O = GND O = GND –5.0 O = GND O = GND –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 TEMPERATURE (°C) TEMPERATURE (°C) 2440 G24 2440 G25 2440fe For more information www.linear.com/LTC2440 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Typical Application Related Parts