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CS5466 데이터시트(PDF) 4 Page - Cirrus Logic |
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CS5466 데이터시트(HTML) 4 Page - Cirrus Logic |
4 / 16 page CS5466 4 DS659F1 2. PIN DESCRIPTION Clock Generator Crystal Out Crystal In 1, 24 XOUT, XIN - A single stage amplifier inside the chip is connected to these pins and can be used with a crystal to provide the system clock for the device. Alternatively, an external clock can be supplied to the XIN pin to provide the system clock for the device. CPU Clock Output 2 CPUCLK - Output of on-chip oscillator which can drive one standard CMOS load. Control Pins Gain Select 5, 7 IGAIN1, IGAIN0 - Used to select the current channel input gain range. Frequency Select 17, 20, 23 FREQ2,FREQ1,FREQ0 - Used to select max pulse output frequency for E1, E2, and FOUT. High Pass Filter Enable 8 HPF - High disables the HPF. Low activates HPF on Voltage channel. Connecting HPF pin to FOUT pin activates HPF on Current channel. Reset 19 RESET - Low activates Reset. Energy Pulse Outputs Energy Output 22, 21 E1, E2 - Active low alternating pulses with an output frequency that is proportional to the active (real) power. High Freq Output 18 FOUT - Outputs energy pulses at a frequency higher than E1 and E2 outputs. Used for calibra- tion purposes. Neg Energy Indicator 6 NEG - High indicates negative energy. Analog Inputs/Outputs Differential Voltage Inputs 9, 10 VIN+, VIN- - Differential analog input pins for voltage channel. Voltage Reference Output 11 VREFOUT - The on-chip voltage reference output pin. The voltage reference has a nominal magnitude of 2.5 V and is referenced to the AGND pin on the converter. Voltage Reference Input 12 VREFIN - Voltage input to this pin establishes the voltage reference for the on-chip modulators. Differential Current Inputs 16, 15 IIN+, IIN- - Differential analog input pins for current channel. Power Supply Connections Positive Digital Supply 3 VD+ - The positive digital supply. Digital Ground 4 DGND - Digital Ground. Analog Ground 13 AGND - Analog Ground. Positive Analog Supply 14 VA+ - The positive analog supply. VREFIN 12 Voltage Reference Input VREFOUT 11 Voltage Reference Output VIN- 10 Differential Voltage Input VIN+ 9 Differential Voltage Input HPF 8 High-pass Filter Enable IGAIN1 7 Gain Select 1 NEG 6 Negative Energy Indicator IGAIN0 5 Gain Select 0 DGND 4 Digital Ground VD+ 3 Positive Power Supply CPUCLK 2 CPU Clock Output XOUT 1 Crystal Out AGND 13 Analog Ground VA+ 14 Positive Analog Supply IIN- 15 Differential Current Input IIN+ 16 Differential Current Input FREQ2 17 Frequency Select 2 FOUT 18 High-frequency Output RESET 19 Reset FREQ1 20 Frequency Select 1 E2 21 Energy Output 2 E1 22 Energy Output 1 FREQ0 23 Frequency Select 0 XIN 24 Crystal In |
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