LTC1857/LTC1858/LTC1859 CONVERTER AND MULTPLEXER CHARACTERISTICS The l denotes the specifications whichapply over the full operating temperature range, otherwise specifications are at TA = 25°C. MUXOUT connected to ADC inputs. (Notes 5, 6)LTC1857LTC1858LTC1859PARAMETERCONDITIONSMINTYPMAXMINTYPMAXMINTYPMAXUNITS Resolution l 12 14 16 Bits No Missing Codes l 12 14 15 Bits Transition Noise 0.06 0.26 1 LSBRMS Integral Linearity Error (Notes 7, 15) l ±1 ±1.5 ±3 LSB Differential Linearity Error (Note 15) l –1 1 –1 1.5 –2 4 LSB Bipolar Zero Error (Note 8) l ±9 ±17 ±28 LSB Bipolar Zero Error Drift ±0.1 ±0.1 ±0.1 ppm/°C Bipolar Zero Error Match ±4 ±6 ±10 LSB Unipolar Zero Error (Note 8) l ±6 ±15 ±25 LSB Unipolar Zero Error Drift ±1 ±1 ±1 ppm/°C Unipolar Zero Error Match ±1.2 ±2 ±8 LSB Bipolar Full-Scale Error External Reference (Note 11) l ±0.35 ±0.15 ±0.1 % Internal Reference (Note 11) ±0.45 ±0.4 ±0.4 % Bipolar Full-Scale Error Drift External Reference ±2.5 ±2.5 ±2.5 ppm/°C Internal Reference ±7 ±7 ±7 ppm/°C Bipolar Full-Scale Error Match ±5 ±10 ±15 LSB Unipolar Full-Scale Error External Reference (Note 11) l ±0.45 ±0.25 ±0.2 % Internal Reference (Note 11) ±0.75 ±0.85 ±0.75 % Unipolar Full-Scale Error Drift External Reference ±2.5 ±2.5 ±2.5 ppm/°C Internal Reference ±7 ±7 ±7 ppm/°C Unipolar Full-Scale Error Match ±5 ±12 ±15 LSB Input Common Mode Range Unipolar Mode l 0 to 10 0 to 10 0 to 10 V Bipolar Mode l ±10 ±10 ±10 V Input Common Mode Rejection Ratio 96 96 96 dB ANALOG INPUT The l denotes the specifications which apply over the full operating temperature range, otherwisespecifications are at TA = 25°C. (Note 5) PARAMETERCONDITIONSMINTYPMAXUNITS Analog Input Range CH0 to CH7, COM 0 to 5, 0 to 10 V ±5, ±10 V ADC+, ADC– (Note 3) 0 to 2.048 V 0 to 4.096 V ADC– ±1.024 V ADC– ±2.048 V Impedance CH0 to CH7, COM Unipolar 42 kΩ Bipolar 31 kΩ MUXOUT+, MUXOUT– Unipolar 10 kΩ Bipolar 5 kΩ ADC+, ADC– Hi-Z kΩ Capacitance CH0 to CH7, COM 5 pF Sample Mode ADC+, ADC– 0V to 2.048V, ±1.024V 24 pF 0V to 4.096V, ±2.048V 12 pF Hold Mode ADC+, ADC– 4 pF Input Leakage Current ADC+, ADC–, CONVST = Low l ±1 µA 185789fb For more information www.linear.com/LTC1857 3 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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