LTC1857/LTC1858/LTC1859 DYNAMIC ACCURACYThe l denotes the specifications which apply over the full operating temperature range,otherwise specifications are at TA = 25°C. MUXOUT connected to ADC inputs. (Notes 5, 12)LTC1857LTC1858LTC1859SYMBOL PARAMETERCONDITIONSMINTYPMAXMINTYPMAXMINTYPMAX UNITS S/(N + D) Signal-to-(Noise + Distortion) Ratio 1kHz Input Signal 74 83 87 dB THD Total Harmonic Distortion 1kHz Input Signal, –101 –101 –101 dB First Five Harmonics Peak Harmonic or Spurious Noise 1kHz Input Signal –103 –103 –103 dB Channel-to-Channel Isolation 1kHz Input Signal –120 –120 –120 dB –3dB Input Bandwidth 1 1 1 MHz Aperture Delay –70 –70 –70 ns Aperture Jitter 60 60 60 ps Transient Response Full-Scale Step 4 4 4 µs (Note 9) Overvoltage Recovery (Note 13) 150 150 150 ns INTERNAL REFERENCE CHARACTERISTICSThe l denotes the specifications which apply over thefull operating temperature range, otherwise specifications are at TA = 25°C. (Note 5)PARAMETERCONDITIONSMINTYPMAXUNITS VREF Output Voltage IOUT = 0 l 2.475 2.5 2.525 V VREF Output Temperature Coefficient IOUT = 0 ±10 ppm/°C VREF Output Impedance –0.1mA ≤ IOUT ≤ 0.1mA 8 kΩ VREFCOMP Output Voltage IOUT = 0 4.096 V DIGITAL INPUTS AND DIGITAL OUTPUTSThe l denotes the specifications which apply over thefull operating temperature range, otherwise specifications are at TA = 25°C. (Note 5)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS VIH High Level Input Voltage VDD = 5.25V l 2.4 V VIL Low Level Input Voltage VDD = 4.75V l 0.8 V IIN Digital Input Current VIN = 0V to VDD l ±10 µA CIN Digital Input Capacitance 5 pF VOH High Level Output Voltage VDD = 4.75V, IO = –10µA, OVDD = VDD 4.74 V VDD = 4.75V, IO = –200µA, OVDD = VDD l 4 V VOL Low Level Output Voltage VDD = 4.75V, IO = 160µA, OVDD = VDD 0.05 V VDD = 4.75V, IO = 1.6mA, OVDD = VDD l 0.10 0.4 V IOZ Hi-Z Output Leakage VOUT = 0V to VDD, RD = High l ±10 µA COZ Hi-Z Output Capacitance RD = High 15 pF ISOURCE Output Source Current VOUT = 0V –10 mA ISINK Output Sink Current VOUT = VDD 10 mA POWER REQUIREMENTSThe l denotes the specifications which apply over the full operating temperaturerange, otherwise specifications are at TA = 25°C. (Note 5)PARAMETERCONDITIONSMINTYPMAXUNITS Positive Supply Voltage (Notes 9 and 10) 4.75 5 5.25 V Positive Supply Current l 8 13 mA Nap Mode 5.5 8 mA Sleep Mode CONVST = 0V or 5V 8 15 µA Power Dissipation 40 mW Nap Mode 27.5 mW Sleep Mode CONVST = 0V or 5V 40 µW 185789fb 4 For more information www.linear.com/LTC1857 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Converter and Multplexer Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Digital Inputs and Digital Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Timing Diagrams Operation Applications Information Package Description Revision History Typical Application Related Parts
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