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LTC2420 Datasheet(PDF) 4 Page - Linear Technology |
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LTC2420 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  LTC2440 4 2440fd POWER REQUIREMENTS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All voltage values are with respect to GND. Note 3: VCC = 4.5 to 5.5V unless otherwise specified. VREF = REF+ – REF–, VREFCM = (REF+ + REF–)/2; VIN = IN+ – IN–, VINCM = (IN+ + IN–)/2. Note 4: fO pin tied to GND or to external conversion clock source with fEOSC = 10MHz unless otherwise specified. Note 5: Guaranteed by design, not subject to test. Note 6: Integral nonlinearity is defined as the deviation of a code from a straight line passing through the actual endpoints of the transfer curve. The deviation is measured from the center of the quantization band. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Supply Voltage l 4.5 5.5 V ICC Supply Current Conversion Mode Sleep Mode CS = 0V (Note 7) CS = VCC (Note 7) l l 8 8 11 30 mA μA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) Note 7: The converter uses the internal oscillator. Note 8: The converter is in external SCK mode of operation such that the SCK pin is used as a digital input. The frequency of the clock signal driving SCK during the data output is fESCK and is expressed in Hz. Note 9: The converter is in internal SCK mode of operation such that the SCK pin is used as a digital output. In this mode of operation, the SCK pin has a total equivalent load capacitance of CLOAD = 20pF. Note 10: The external oscillator is connected to the fO pin. The external oscillator frequency, fEOSC, is expressed in kHz. Note 11: The converter uses the internal oscillator. fO = 0V. Note 12: Guaranteed by design and test correlation. Note 13: There is an internal reset that adds an additional 1μs (typical) to the conversion time. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fEOSC External Oscillator Frequency Range l 0.1 20 MHz tHEO External Oscillator High Period l 25 10000 ns tLEO External Oscillator Low Period l 25 10000 ns tCONV Conversion Time OSR = 256 (SDI = 0) OSR = 32768 (SDI = 1) External Oscillator (Note 10, 13) l l l 0.99 126 1.13 145 40 • OSR + 170 fEOSC(kHz) 1.33 170 ms ms ms fISCK Internal SCK Frequency Internal Oscillator (Note 9) External Oscillator (Notes 9, 10) l 0.8 0.9 fEOSC /10 1 DISCK Internal SCK Duty Cycle (Note 9) l 45 55 % fESCK External SCK Frequency Range (Note 8) l 20 MHz tLESCK External SCK Low Period (Note 8) l 25 ns tHESCK External SCK High Period (Note 8) l 25 ns tDOUT_ISCK Internal SCK 32-Bit Data Output Time Internal Oscillator (Notes 9, 11) External Oscillator (Notes 9, 10) l 30.9 35.3 320/fEOSC 41.6 μs s tDOUT_ESCK External SCK 32-Bit Data Output Time (Note 8) l 32/fESCK s t1 CS to SDO Low Z (Note 12) l 025 ns t2 CS ↑ to SDO High Z (Note 12) l 025 ns t3 CS to SCK (Note 9) l 5μs t4 CS to SCK ↑ (Notes 8, 12) l 25 ns tKQMAX SCK to SDO Valid l 25 ns tKQMIN SDO Hold After SCK (Note 5) l 15 ns t5 SCK Set-Up Before CS l 50 ns t7 SDI Setup Before SCK ↑ (Note 5) l 10 ns t8 SDI Hold After SCK ↑ (Note 5) l 10 ns |
Similar Part No. - LTC2420_15 |
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Similar Description - LTC2420_15 |
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