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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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ADC12138CIWM bảng dữ liệu(PDF) 6 Page - National Semiconductor (TI) |
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ADC12138CIWM bảng dữ liệu(HTML) 6 Page - National Semiconductor (TI) |
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6 / 41 page  Converter Electrical Characteristics The following specifications apply for (V + =V A+=VD+ = +5V, VREF+ = +4.096V, and fully differential input with fixed 2.048V common-mode voltage) or (V + =V A+=VD+ = 3.3V, VREF+ = +2.5V and fully-differential input with fixed 1.250V common-mode voltage), V REF− = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, VREF− and VREF+ ≤ 25Ω,f CK =fSK = 5 MHz, and 10 (tCK) acquisition time unless otherwise specified. Boldface limits apply for TA =TJ = T MIN to TMAX; all other limits TA =TJ = 25˚C. (Notes 7, 8, 9) (Continued) Symbol Parameter Conditions Typical (Note 10) Limits Units (Limits) (Note 11) STATIC CONVERTER CHARACTERISTICS (Continued) Multiplexer Channel to Channel ±0.05 LSB Matching Power Supply Sensitivity V + = +5V ±10% V REF = +4.096V Offset Error ±0.5 LSB + Full-Scale Error ±0.5 LSB − Full-Scale Error ±0.5 LSB + Integral Linearity Error ±0.5 LSB − Integral Linearity Error ±0.5 LSB UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS S/(N+D) Signal-to-Noise Plus f IN = 1 kHz, VIN =5 VPP,VREF + = 5.0V 69.4 dB Distortion Ratio f IN = 20 kHz, VIN =5 VPP,VREF + = 5.0V 68.3 dB f IN = 40 kHz, VIN =5 VPP,VREF+ = 5.0V 65.7 dB −3 dB Full Power Bandwidth V IN =5 VPP, where S/(N+D) drops 3 dB 31 kHz DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS S/(N+D) Signal-to-Noise Plus f IN = 1 kHz, VIN = ±5V, VREF + = 5.0V 77.0 dB Distortion Ratio f IN = 20 kHz, VIN = ±5V, VREF + = 5.0V 73.9 dB f IN = 40 kHz, VIN = ±5V, VREF + = 5.0V 67.0 dB −3 dB Full Power Bandwidth V IN = ±5V, where S/(N+D) drops 3 dB 40 kHz Electrical Characteristics The following specifications apply for (V + =V A+=VD+ = +5V, VREF+ = +4.096V, and fully differential input with fixed 2.048V common-mode voltage) or (V + =V A+=VD+ = +3.3V, VREF+ = 2.5V and fully-differential input with fixed 1.250V common-mode voltage), V REF− = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, VREF− and VREF+ ≤ 25Ω,f CK =fSK = 5 MHz, and 10 (tCK) acquisition time unless otherwise specified. Boldface limits apply for TA =TJ = T MIN to TMAX; all other limits TA =TJ = 25˚C. (Notes 7, 8, 9) Symbol Parameter Conditions Typical Limits Units (Note 10) (Note 11) (Limits) REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS C REF Reference Input Capacitance 85 pF C A/D A/DIN1 and A/DIN2 Analog Input 75 pF Capacitance A/DIN1 and A/DIN2 Analog Input V IN = +5.0V or ±0.1 µA Leakage Current V IN =0V CH0–CH7 and COM Input Voltage GND − 0.05 V V A+ + 0.05 C CH CH0–CH7 and COM Input Capacitance 10 pF C MUXOUT MUX Output Capacitance 20 pF Off Channel Leakage (Note 16) On Channel = 5V and −0.01 µA CH0–CH7 and COM Pins Off Channel = 0V On Channel = 0V and 0.01 µA Off Channel = 5V www.national.com 6 |
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