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WM2148 データシート(PDF) 5 Page - Wolfson Microelectronics plc |
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WM2148 データシート(HTML) 5 Page - Wolfson Microelectronics plc |
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5 / 14 page  Production Data WM2148 WOLFSON MICROELECTRONICS LTD PD Rev 1.1 February 2001 5 ELECTRICAL CHARACTERISTICS Electrical characteristics over recommended temperature range, AVDD = DVDD = 3.3V (unless otherwise noted) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Power Supplies Analogue Supply Current AIDD AVDD = 3.6V 81 90 mA Digital Supply Current DIDD DVDD = 3.6V 5 10 mA Power Consumption P AVDD = DVDD = 3.6V 270 360 mW Power Down Supply Current (sum of all supply currents) IPD = AIDD+DIDD Power down mode CLK signal stopped 20 µA DC Characteristics Resolution 14 bits Differential Nonlinearity DNL ± 0.6 ± 1 bits Integral Nonlinearity INL Best Fit ± 3 ± 5 bits Offset Error IN+ = IN-, 0dB gain 0.3 % of FSR Gain Error 0 dB gain 1 % of FSR AC Characteristics Analogue Input Bandwidth 140 MHz FIN = 100kHz -81 FIN = 1MHz -78 Total Harmonic Distortion THD FIN = 4MHz -77 dB FIN = 1MHz 70 72 Signal to Noise Ratio SNR FIN = 4MHz 71 dB FIN = 1MHz 69 70 Signal to Noise plus Distortion SINAD FIN = 4MHz 70 dB FIN = 1MHz 73 80 Spurious Free Dynamic Range SFDR FIN = 4MHz 80 dB Effective Number of Bits ENOB 11.2 11.5 bits Reference Voltage Bandgap Voltage VBG Internal reference 1.425 1.5 1.575 V Temperature Coefficient 40 ppm / °C Supply Voltage Coefficient 200 ppm / V VBG Input Impedance External reference 40 k Ω Positive Reference Voltage VREF+ VREF+ = VBG (1 + 2/ 3) 2.5 V Negative Reference Voltage VREFí VREF+ = VBG (1 - 2/ 3) 0.5 V Reference Voltage Difference ¨9REF ¨9REF = VREF+ - VREFí 2.0 V Analog Inputs Positive Analogue Input Voltage VIN+ 0AVDD V Negative Analogue Input Voltage VINí 0AVDD V Input Voltage Difference ¨9IN ¨9IN = VIN+ - VINí - ¨9REF ¨9REF V Input impedance ZIN 25 k Ω PGA Range 07 dB PGA Step Size 1dB PGA Gain Error ± 0.25 dB Digital Inputs Input LOW level VIL 0.8 V Input HIGH level VIH 2V Input current IIN ± 1 µA Input capacitance CIN 5pF |
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