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CS5461A-IS Datasheet(PDF) 8 Page - Cirrus Logic |
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CS5461A-IS Datasheet(HTML) 8 Page - Cirrus Logic |
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8 / 44 page  CS5461A 8 DS661F2 ANALOG CHARACTERISTICS (Continued) 1. Applies when the HPF option is enabled. 2. Applies before system calibration. 3. All outputs unloaded. All inputs CMOS level. 4. Measurement method 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 CS5461A 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): 5. When voltage level on PFMON is sagging, and LSD bit is at 0, the voltage at which LSD bit is set to 1. 6. If the LSD bit has been set to 1 (because PFMON voltage fell below PMLO), this is the voltage level on PFMON at which the LSD bit can be permanently reset back to 0. VOLTAGE REFERENCE Notes: 7. The voltage at VREFOUT is measured across the temperature range. From these measurements the following formula is used to calculate the VREFOUT Temperature Coefficient:. 8. Specified at maximum recommended output of 1 µA, source or sink. Parameter Symbol Min Typ Max Unit Temperature Channel Temperature Accuracy T - ±5 - °C Power Supplies Power Supply Currents (Active State) IA+ ID+ (VA+ = VD+ = 5 V) ID+ (VA+ = 5 V, VD+ = 3.3 V) PSCA PSCD PSCD - - - 1.1 2.9 1.7 - - - mA mA mA Power Consumption Active State (VA+ = VD+ = 5 V) (Note 3) Active State (VA+ = 5 V, VD+ = 3.3 V) Stand-By State Sleep State PC - - - - 21 12 8 10 28 16.5 - - mW mW mW µW Power Supply Rejection Ratio (DC, 50 and 60 Hz) (Note 4) Voltage Channel Current Channel PSRR 45 70 65 75 - - dB dB PFMON Low-voltage Trigger Threshold (Note 5) PMLO 2.3 2.45 - V PFMON High-voltage Power-On Trip Point (Note 6) PMHI - 2.55 2.7 V Parameter Symbol Min Typ Max Unit Reference Output Output Voltage VREFOUT +2.4 +2.5 +2.6 V Temperature Coefficient (Note 7) TCVREF - 25 60 ppm/°C Load Regulation (Note 8) ∆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 ⋅ = ( V REF O UT MA X - VR EF O U T MIN ) VR EF O U T AVG ( 1 T A MA X - T A MI N ( 1. 0 x 1 0 ( 6 TC VR EF = |
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