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LTC2449 Datasheet(PDF) 3 Page - Linear Technology |
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LTC2449 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 28 page  LTC2444/LTC2445/ LTC2448/LTC2449 3 sn2444589 2444589fs ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution (No Missing Codes) 0.1V ≤ VREF ≤ VCC, –0.5 • VREF ≤ VIN ≤ 0.5 • VREF, (Note 5) ● 24 Bits Integral Nonlinearity VCC = 5V, REF+ = 5V, REF– = GND, VINCM = 2.5V, (Note 6) ● 5 15 ppm of VREF REF+ = 2.5V, REF– = GND, VINCM = 1.25V, (Note 6) 3 ppm of VREF Offset Error 2.5V ≤ REF+ ≤ VCC, REF– = GND, ● 2.5 5 µV GND ≤ IN+ = IN– ≤ VCC (Note 12) Offset Error Drift 2.5V ≤ REF+ ≤ VCC, REF – = GND, 20 nV/°C GND ≤ IN+ = IN– ≤ VCC Positive Full-Scale Error REF+ = 5V, REF– = GND, IN+ = 3.75V, IN– = 1.25V ● 10 50 ppm of VREF REF+ = 2.5V, REF– = GND, IN+ = 1.875V, IN– = 0.625V ● 10 50 ppm of VREF Positive Full-Scale Error Drift 2.5V ≤ REF+ ≤ VCC, REF– = GND, 0.2 ppm of VREF/°C IN+ = 0.75REF+, IN– = 0.25 • REF+ Negative Full-Scale Error REF+ = 5V, REF– = GND, IN+ = 1.25V, IN– = 3.75V ● 10 50 ppm of VREF REF+ = 2.5V, REF– = GND, IN+ = 0.625V, IN– = 1.875V ● 10 50 ppm of VREF Negative Full-Scale Error Drift 2.5V ≤ REF+ ≤ VCC, REF – = GND, 0.2 ppm of VREF/°C IN+ = 0.25 • REF+, IN– = 0.75 • REF+ Total Unadjusted Error 5V ≤ VCC ≤ 5.5V, REF+ = 2.5V, REF– = GND, VINCM = 1.25V 15 ppm of VREF 5V ≤ VCC ≤ 5.5V, REF+ = 5V, REF– = GND, VINCM = 2.5V 15 ppm of VREF REF+ = 2.5V, REF– = GND, VINCM = 1.25V, (Note 6) 15 ppm of VREF Input Common Mode Rejection DC 2.5V ≤ REF+ ≤ VCC, REF– = GND, 120 dB GND ≤ IN– = IN+ ≤ VCC The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IN+ Absolute/Common Mode IN+ Voltage ● GND – 0.3V VCC + 0.3V V IN– Absolute/Common Mode IN– Voltage ● GND – 0.3V VCC + 0.3V V VIN Input Differential Voltage Range ● –VREF/2 VREF/2 V (IN+ – IN–) REF+ Absolute/Common Mode REF+ Voltage ● 0.1 VCC V REF– Absolute/Common Mode REF– Voltage ● GND VCC – 0.1V V VREF Reference Differential Voltage Range ● 0.1 VCC V (REF+ – REF–) CS(IN+) IN+ Sampling Capacitance 2 pF CS(IN–) IN– Sampling Capacitance 2 pF CS(REF+) REF+ Sampling Capacitance 2 pF CS(REF–) REF– Sampling Capacitance 2 pF IDC_LEAK(IN+, IN–, Leakage Current, Inputs and Reference CS = VCC, IN + = GND, IN– = GND, ● –15 1 15 nA REF+, REF–) REF+ = 5V, REF– = GND ISAMPLE(IN+, IN–, Average Input/Reference Current Varies, See Applications Section nA REF+, REF–) During Sampling tOPEN MUX Break-Before-Make 50 ns QIRR MUX Off Isolation VIN = 2VP-P DC to 1.8MHz 120 dB The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) A ALOG I PUT A D REFERE CE |
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