LTC1863L/LTC1867L CONVERTER CHARACTERISTICSThe l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VDD = 2.7V, external VREF = 1.25V (Notes 5, 6)LTC1863LLTC1867LLTC1867LAPARAMETERCONDITIONSMINTYPMAXMINTYPMAXMINTYPMAXUNITS Gain Error Unipolar ±6 ±96 ±64 LSB Bipolar ±6 ±96 ±64 LSB Gain Error Match Unipolar ±1 ±4 ±3 LSB Bipolar ±1 ±4 ±3 LSB Gain Error Tempco Internal Reference ±20 ±20 ±20 ppm/°C External Reference ±3 ±3 ±3 ppm/°C Power Supply Sensitivity VDD = 2.7V – 3.6V ±1 ±3 ±3 LSB DYNAMIC ACCURACYVDD = 3V, external VREF = 1.25V (Note 5)LTC1863LLTC1867L/LTC1867LASYMBOLPARAMETERCONDITIONSMINTYPMAXMINTYPMAXUNITS SNR Signal-to-Noise Ratio 1kHz Input Signal 73.1 83.7 dB S/(N+D) Signal-to-(Noise + Distortion) Ratio 1kHz Input Signal 73 83.1 dB THD Total Harmonic Distortion 1kHz Input Signal, Up to 5th Harmonic –91.8 – 92.3 dB Peak Harmonic or Spurious Noise 1kHz Input Signal –94.8 –95.1 dB Channel-to-Channel Isolation 100kHz Input Signal –100 –112 dB Full Power Bandwidth –3dB Point 1.25 1.25 MHz ANALOG INPUT The l denotes the specifications which apply over the full operating temperature range, otherwisespecifications are at TA = 25°C. (Note 5)LTC1863L/LTC1867L/LTC1867LASYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS Analog Input Range Unipolar Mode (Note 9) l 0 to 2.5 V Bipolar Mode l ±1.25 V CIN Analog Input Capacitance for CH0 to Between Conversions (Sample Mode) 32 pF CH7/COM During Conversions (Hold Mode) 4 pF tACQ Sample-and-Hold Acquisition Time l 2.01 1.68 µs Input Leakage Current On Channels, CHX = 0V or VDD l ±1 µA INTERNAL REFERENCE CHARACTERISTICS(Note 5)LTC1863L/LTC1867L/LTC1867LAPARAMETERCONDITIONSMINTYPMAXUNITS VREF Output Voltage IOUT = 0 1.235 1.25 1.265 V VREF Output Tempco IOUT = 0 ±20 ppm/°C VREF Line Regulation 2.7V ≤ VDD ≤ 3.6V 0.3 mV/V VREF Output Resistance IOUT ≤0.1mA 3 kΩ REFCOMP Output Voltage IOUT = 0 2.5 V DIGITAL INPUTS AND DIGITAL OUTPUTS The l denotes the specifications which apply over thefull operating temperature range, otherwise specifications are at TA = 25°C. (Note 5)LTC1863L/LTC1867L/LTC1867LASYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS VIH High Level Input Voltage VDD = 3.6V l 1.9 V VIL Low Level Input Voltage VDD = 2.7V l 0.45 V 1863l7lfe For more information www.linear.com/LTC1863L 3 Document Outline Description Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Package Description Related Parts
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