5 6 7 IC1 R11 R12 C3 A SCLK 74HC541DW miso 7 SCLK AD8608ARZARZ 1 2 4 5 8 9 AD8608ARZARZ R20 GND miso PMOD JP1 7 1 2 3 4 5 6 7 8 8 9 9 10 10 11 11 12 12 1 2 3 4 5 6 adccs 1K 10K R21 C 3.125V GND DAC CS R18 AGND 15 pgacs dacsc 15K AGND AGND 1 2 3 4 5 6 IC4C 10 AGND AD8608ARZARZ AGND AD8608ARZARZ R2 14 13 15 R1 IC3D 12 Digital Test Points 1. mosi 2. miso 3. sclk 4. pgacs 5. daccs 6. adccs +3V3 7 6 VOUTA VOUTB VOUTC VOUTD PGA CS IR+/RD- 6K8 DIN SYNC* 6K8 R26 10 VREFIN/VREFOUT 8 6 5 B VDD 6K8 R27 10 R6 MOSI R17 10 IC3B GND DigTP 1.25 JP2 R5 Q2N Q1N FDS4559 FDS4559 R4 8 AGND 1 19 pgacs AD5624RBRMZ-3 C G1 G2 DAC 3 9 2 3 4 5 6 7 8 9 mosi sclk 9 10 AD8608ARZARZ IC3C R7 GND A1 A2 A3 A4 A5 A6 A7 A8 6K8 IC3A 1 10 MOSI Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 6K8 R19 10 AD8608ARZARZ 2 IC2 18 17 16 15 14 13 12 11 miso +3V3 AGND AGND AGND +3V3 +3V3 Q2P Q1P FDS4559 FDS4559 R3 AGND 11 IC3P 3 RDON GND U1 4 B IRON GND AGND AGND AGND 220p G1 G2 1 19 adccs dacsc 1K2 Q3NA FDS6892 220p 2 3 4 5 6 pgacs 7 dacsc 8 adccs 9 74HC540DW 3K8 R13 Q3NB FDS6892 C2 1K2 R10 3K8 A1 A2 A3 A4 A5 A6 A7 A8 LED2 yellow Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 10 R15 R14 A 10 pgacs 18 17 16 15 14 13 12 11 8 180 4 LED1 red 3 120 2 R8 1 RD+/IRGND GND GND GND GND 2 CH0 4 VSS C20 4 11 2 IC4P AGND AD8608ARZARZ 3 22.10.2014 10:56:08 f=0.74 C:\Mue\eagle\poxi2\poxi2.sch (Sheet: 1/1) 2 VDD 1 8 6 CS SCLK DIN C6 5 4 AIN0 AIN1/VREF 10mu 3 GND 4 C13 C14 C15 C16 C18 C19 C1 100n 100n 100n 100n 100n 100n 100n 15mu DOUT AGND ADC GND 7 R24 AGND AGND L2 IC4D GNDA GNDA Finger Probe 1 1m Shield C12 GND U2 0 R9 0 AD7887ARMZ 5 E GND AGND 14 6 7 8 9 DS9F AD8608ARZARZ 12 GNDA E D MCP6S21-I/SN 15n 4 KHz LP 13 X1 1 2 3 4 5 ADC CS AGND AGND R31 IC4A 2K7 2K7 +3V3 3 AD8608ARZARZ 5 AnaTP 6 AD8608ARZARZ R28 1 AGND 2 390p +3V3 TIA C4 Analog Test Points 1. DACoutA 2. DACoutB 3. DACoutC 4. DACoutD 5. adc in (AIN0) 6. pga in (CH0) +3V3 7 IC4B 2K7 AGND 1M2 1 VOUT +3V3 SCK VREF ~CS SI +3V3 VDD 7 3 5 6 +3V3 D 8 2K7 R30 18 PGA JP3 R29 R16 ADC CS 6 5 4 3 2 1 U3 AGND C5 12p +3V3 R22 GND 6 Poxi_2 PMOD Pulse Oximeter Control/Instrumentation / ESD Univ. Bremerhaven 2014 7 8
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