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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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ADC12138CIWM Fiches technique(PDF) 7 Page - Texas Instruments |
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ADC12138CIWM Fiches technique(HTML) 7 Page - Texas Instruments |
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7 / 51 page  ADC12130, ADC12132, ADC12138 www.ti.com SNAS098G – MARCH 2000 – REVISED MARCH 2013 Converter Electrical Characteristics (continued) 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), VREF− = 0V, 12-bit + sign conversion mode (1), source impedance for analog inputs, V REF − and V REF + ≤ 25Ω, f CK = fSK = 5 MHz, and 10 (tCK) acquisition time unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. (2)(3)(4) Units Parameter Test Conditions Typical (5) Limits (6) (Limits) DC Common Mode Error After Auto Cal (10) ±2 LSB (max) TUE Total Unadjusted Error After Auto Cal (7)(11) (12) ±1 LSB Multiplexer Chan-to-Chan Matching V+ = +5V ±10%, VREF = +4.096V ±0.05 LSB Power Supply Sensitivity Offset Error ±0.5 LSB + Full-Scale Error ±0.5 LSB − Full-Scale Error ±0.5 LSB Integral Linearity Error ±0.5 LSB UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS fIN = 1 kHz, VIN = 5 VPP, VREF + = 5.0V 69.4 dB S/(N+D) Signal-to-Noise Plus Distortion Ratio fIN = 20 kHz, VIN = 5 VPP, VREF + = 5.0V 68.3 dB fIN = 40 kHz, VIN = 5 VPP, VREF+ = 5.0V 65.7 dB −3 dB Full Power Bandwidth VIN = 5 VPP, where S/(N+D) drops 3 dB 31 kHz DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS fIN = 1 kHz, VIN = ±5V, VREF + = 5.0V 77.0 dB S/(N+D) Signal-to-Noise Plus Distortion Ratio fIN = 20 kHz, VIN = ±5V, VREF + = 5.0V 73.9 dB fIN = 40 kHz, VIN = ±5V, VREF + = 5.0V 67.0 dB −3 dB Full Power Bandwidth VIN = ±5V, where S/(N+D) drops 3 dB 40 kHz REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS CREF Reference Input Capacitance 85 pF A/DIN1 and A/DIN2 Analog Input CA/D 75 pF Capacitance A/DIN1 and A/DIN2 Analog Input VIN = +5.0V or VIN = 0V ±0.1 μA Leakage Current GND − 0.05 V (min) CH0–CH7 and COM Input Voltage (VA+) + 0.05 V (max) CCH CH0–CH7 and COM Input Capacitance 10 pF CMUXOUT MUX Output Capacitance 20 pF On Channel = 5V and −0.01 μA Off Channel = 0V Off Channel Leakage (13) CH0–CH7 and COM Pins On Channel = 0V and 0.01 μA Off Channel = 5V On Channel = 5V and 0.01 μA Off Channel = 0V On Channel Leakage (13) CH0–CH7 and COM Pins On Channel = 0V and −0.01 μA Off Channel = 5V MUXOUT1 and MUXOUT2 Leakage VMUXOUT = 5.0V or VMUXOUT = 0V 0.01 μA Current VIN = 2.5V and RON MUX On Resistance 850 1900 Ω (max) VMUXOUT = 2.4V VIN = 2.5V and RON Matching Channel to Channel 5 % VMUXOUT = 2.4V (10) The DC common-mode error is measured in the differential multiplexer mode with the assigned positive and negative input channels shorted together. (11) Offset or Zero error is a measure of the deviation from the mid-scale voltage (a code of zero), expressed in LSB. It is the average value of the code transitions between −1 to 0 and 0 to +1 (see Figure 7). (12) Total unadjusted error includes offset, full-scale, linearity and multiplexer errors. (13) Channel leakage current is measured after the channel selection. Copyright © 2000–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: ADC12130 ADC12132 ADC12138 |
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