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CS5550 데이터시트(PDF) 6 Page - Cirrus Logic |
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CS5550 데이터시트(HTML) 6 Page - Cirrus Logic |
6 / 24 page CS5550 6 DS630F1 ANALOG CHARACTERISTICS (Continued) Notes: 3. The minimum FSCR is limited by the maximum allowed gain register value. 4. All outputs unloaded. All inputs CMOS level. 5. Definition for PSRR: VREFIN tied to VREFOUT, VA+ = VD+ = 5 V, a 150 mV (zero-to-peak) (60 Hz) sinewave is imposed onto the +5 V DC supply voltage at VA+ and VD+ pins. The “+” and “-” input pins of both input channels are shorted to AGND. Then the CS5550 is commanded to continuous conversion acquisition mode, and digital output data is collected for the channel under test. The (zero-to-peak) value of the digital sinusoidal output signal is determined, and this value is converted into the (zero-to-peak) value of the sinusoidal voltage (measured in mV) that would need to be applied at the channel’s inputs, in order to cause the same digital sinusoidal output. This voltage is then defined as Veq. PSRR is then (in dB): VOLTAGE REFERENCE Notes: 6. The voltage at VREFOUT is measured across the temperature range. From these measurements the following formula is used to calculate the VREFOUT Temperature Coefficient:. Parameter Symbol Min Typ Max Unit Dynamic Characteristics High Rate Filter Output Word Rate OWR - DCLK/1024 - Hz Input Sampling Rate DCLK = MCLK/K - DCLK/8 - Hz Full Scale Calibration Range (Note 3) FSCR 25 - 100 %F.S. High Pass Filter Pole Frequency -3 dB - 0.5 - Hz Power Supplies Power Supply Currents (Active State) IA+ ID+ (VD+ = 5 V) ID+ (VD+ = 3.3 V) PSCA PSCD PSCD - - - 1.3 2.9 1.7 - - - mA mA mA Power Consumption Active State (VD+ = 5 V) (Note 4) Active State (VD+ = 3.3 V) Stand-by State Sleep State PC - - - - 21 11.6 6.75 10 30 - - - mW mW mW µW Power Supply Rejection Ratio (AIN1 ±) (Gain = 10) (50, 60 Hz)(Note 5) (Gain = 50) PSRR1 PSRR1 56 70 - - - - dB dB Power Supply Rejection Ratio (AIN2 ±) (Gain = 50) (50, 60 Hz)(Note 5) PSRR2 -55- dB Parameter Symbol Min Typ Max Unit Reference Output Output Voltage REFOUT 2.4 - 2.6 V Temperature Coefficient (Note 6) TC - 25 60 ppm/°C Load Regulation (Output Current 1 µA Source or Sink) ∆VR -6 10 mV Reference Input Input Voltage Range VREFIN 2.4 2.5 2.6 V Input Capacitance - 4 - pF Input CVF Current - 25 - nA PSRR 20 150 V eq --------- ⎩⎭ ⎨⎬ ⎧⎫ log ⋅ = (VREFOUTMAX - VREFOUTMIN) VREFOUTAVG ( 1 T A MAX - T A MIN ( 1.0 x 10 ( 6 TC VREF = |
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