<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="8.3.1">
<drawing>
<board>
<plain>
<text>4-20V</text>
<text>SCL</text>
<text>A7</text>
<text>A6</text>
<text>SDA</text>
<text>iSensor
Teensy 3.x
Arduino 
Shield </text>
<text>RTC</text>
<text>ICSP</text>
<wire x1="2.54" y1="19.05" x2="5.08" y2="16.51" width="0.2032" layer="20"/>
<wire x1="5.08" y1="16.51" x2="53.34" y2="16.51" width="0.2032" layer="20"/>
<wire x1="53.34" y1="16.51" x2="55.88" y2="19.05" width="0.2032" layer="20"/>
<wire x1="55.88" y1="19.05" x2="55.88" y2="73.66" width="0.2032" layer="20"/>
<wire x1="55.88" y1="73.66" x2="53.34" y2="73.66" width="0.2032" layer="20"/>
<wire x1="53.34" y1="73.66" x2="50.8" y2="76.2" width="0.2032" layer="20"/>
<wire x1="50.8" y1="76.2" x2="17.78" y2="76.2" width="0.2032" layer="20"/>
<wire x1="17.78" y1="76.2" x2="15.24" y2="73.66" width="0.2032" layer="20"/>
<wire x1="15.24" y1="73.66" x2="3.81" y2="73.66" width="0.2032" layer="20"/>
<wire x1="3.81" y1="73.66" x2="2.54" y2="72.39" width="0.2032" layer="20"/>
<wire x1="2.54" y1="72.39" x2="2.54" y2="19.05" width="0.2032" layer="20"/>
<text>RTC</text>
<text>GND</text>
<text>GND</text>
<text>EXT</text>
<text>USB</text>
<text>-</text>
<text>+</text>
<text>RevD-02/2019</text>
<text>Juan Chong</text>
<text>PROG</text>
<text>A14</text>
<text>PROG</text>
<text>A14</text>
<text>REG</text>
<text>EXT</text>
<text>+</text>
<text>-</text>
<text> 3.3V </text>
<text>ONLY!</text>
<text>SWBP</text>
<text>1.  This drawing is CAD generated. No manual changes authorized after release. 
2.  All printed wiring boards to be manufactured in accordance with IPC-6011 and IPC-6012. 
      In case of conflict this drawing governs all other specifications. 
3.  Material, copper sheet laminate, copper clad FR4 170Tg/290Td. Interior 
      layers (if applicable) to be 35um copper. Exterior layers to be 70um copper finished. 
      Final thickness to be ~1.60mm. 
4.  All product manufactured to this drawing shall be RoHS compliant. 
5.  All holes are plated through holes unless noted otherwise. Minimum plated through holes 
      to have 25um thick walls. 
6.  All finished trace widths to be +/- 13um measured at the bottom, minimum finished 
      spacing to be 100um. 
7.  All exposed copper to be finished with ENIG (gold) finish over clean bare copper. 
8.  Bow and twist shall not exceed 0.50% measured diagonally, per IPC-TM-650. 
9.  Drill boards using drill data, drill patterns, and drill table provided. Hole locations 
      shall be 0.075mm (radial error) about true position. All finished holes to be +/-0.075mm 
      diameter unless noted otherwise. All finished vias to be +0.075mm to closed diameter. 
10. Minimum annular ring to be 50um external layers and 25um internal layers (if applicable). 
11. Layer to layer misalignment shall not exceed 75um (radial error) about true position. 
12. Solder mask construction to be SMOBC using green LPI solder mask material. Solder mask 
      to be 18 ~ 50um thick after curing, both sides. 
13. Solder mask misalignment shall not exceed 0.075mm. Solder mask may overlap through hole 
      solder pads by 0.025mm maximum, but shall not overlap SMT pads. 
14. Silkscreen should be applied over solder mask using a white epoxy-based ink. The silkscreen 
      should not overlap solder pads unless noted otherwise. 
15. Dimensions shown reflect the board size after plating. 
16. The circuit board manufacturer shall apply a name and date code on the bottom side 
      of the board in copper etch. </text>
<text>LAYER-STACK</text>
<text>01-16</text>
<text>01-20</text>
</plain>
<libraries>
<library name="SparkFun-Connectors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find connectors and sockets- basically anything that can be plugged into or onto.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="2X3">
</package>
<package name="1X02@1">
</package>
<package name="SCREWTERMINAL-3.5MM-2@1">
</package>
<package name="1X03@1">
</package>
<package name="SCREWTERMINAL-3.5MM-2">
<description>&lt;h3&gt;Screw Terminal  3.5mm Pitch - 2 Pin PTH&lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count: 2&lt;/li&gt;
&lt;li&gt;Pin pitch: 3.5mm/138mil&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href=”https://www.sparkfun.com/datasheets/Prototyping/Screw-Terminal-3.5mm.pdf”&gt;Datasheet referenced for footprint&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;CONN_02&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
<package name="1X03">
<description>&lt;h3&gt;Plated Through Hole - 3 Pin&lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count:3&lt;/li&gt;
&lt;li&gt;Pin pitch:0.1"&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;CONN_03&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="Testing">
<packages>
<package name="TEENSY-3.1">
</package>
<package name="UNO_R3_SHIELD_HOLES">
<description>Uno R3 Compatible Board Layout</description>
</package>
</packages>
</library>
<library name="SparkFun-Passives">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find resistors, capacitors, inductors, test points, jumper pads, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="PAD-JUMPER-3-2OF3_NC_BY_PASTE_YES_SILK_FULL_BOX">
</package>
<package name="0603-CAP">
</package>
<package name="0603-RES">
</package>
<package name="1210">
</package>
<package name="1206">
</package>
</packages>
</library>
<library name="AnalogDevices">
<packages>
<package name="SOIC-8-PAD">
<description>&lt;b&gt;SOIC-8-PAD&lt;/b&gt; Small Outline Integrated Circuit, 1.27 mm Pitch&lt;br&gt;</description>
</package>
<package name="CLF6045-H">
</package>
</packages>
</library>
<library name="Chong">
<packages>
<package name="DO214AA">
<description>&lt;b&gt;DIODE&lt;/b&gt;</description>
</package>
<package name="SOT23-6">
</package>
</packages>
</library>
<library name="Analog Devices iSensors">
<packages>
<package name="A3-16PA-2SV(71)-TOP">
</package>
</packages>
</library>
<library name="drilegend">
<packages>
<package name="DRILEGEND">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="J2" library="Testing" package="UNO_R3_SHIELD_HOLES" value="ARDUINO_R3_SHIELDUNO_R3_SHIELD_HOLES"/>
<element name="J4" library="SparkFun-Connectors" package="2X3" value="AVR_SPI_PRG_6PTH">
<attribute name="NAME"/>
<attribute name="PARTNO" value="M20-9720345"/>
<attribute name="VALUE"/>
</element>
<element name="J3" library="Testing" package="TEENSY-3.1" value="TEENSY-3.1SILK">
<attribute name="NAME"/>
<attribute name="PARTNO" value="TEENSY32"/>
<attribute name="SF_ID" value="DEV-12646"/>
<attribute name="VALUE"/>
</element>
<element name="SJ1" library="SparkFun-Passives" package="PAD-JUMPER-3-2OF3_NC_BY_PASTE_YES_SILK_FULL_BOX" value="JUMPER-PAD-3-2OF3_NC_BY_PASTE">
<attribute name="VALUE"/>
<attribute name="VALUE"/>
</element>
<element name="SJ2" library="SparkFun-Passives" package="PAD-JUMPER-3-2OF3_NC_BY_PASTE_YES_SILK_FULL_BOX" value="JUMPER-PAD-3-2OF3_NC_BY_PASTE">
<attribute name="VALUE"/>
<attribute name="VALUE"/>
</element>
<element name="J5" library="SparkFun-Connectors" package="1X02@1" value="M02PTH">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="J6" library="SparkFun-Connectors" package="1X02@1" value="M02PTH">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="U1" library="AnalogDevices" package="SOIC-8-PAD" value="ADP2303">
<attribute name="NAME"/>
<attribute name="PARTNO" value="ADP2303ARDZ"/>
<attribute name="VALUE"/>
</element>
<element name="J8" library="SparkFun-Connectors" package="SCREWTERMINAL-3.5MM-2@1" value="VIN">
<attribute name="PARTNO" value="20020327-C021B01LF"/>
</element>
<element name="C7" library="SparkFun-Passives" package="0603-CAP" value="0.1uF">
<attribute name="NAME"/>
<attribute name="PARTNO" value="CL10B104KB8NNNC"/>
<attribute name="VALUE"/>
</element>
<element name="R5" library="SparkFun-Passives" package="0603-RES" value="31.6k">
<attribute name="NAME"/>
<attribute name="PARTNO" value="ERJ-3EKF3162V"/>
<attribute name="VALUE"/>
</element>
<element name="R6" library="SparkFun-Passives" package="0603-RES" value="10.2k">
<attribute name="NAME"/>
<attribute name="PARTNO" value="ERJ-3EKF1022V"/>
<attribute name="VALUE"/>
</element>
<element name="C8" library="SparkFun-Passives" package="0603-CAP" value="0.1uF">
<attribute name="NAME"/>
<attribute name="PARTNO" value="CL10B104KB8NNNC"/>
<attribute name="VALUE"/>
</element>
<element name="C9" library="SparkFun-Passives" package="1210" value="22uF">
<attribute name="NAME"/>
<attribute name="PARTNO" value="TLJA476M010R0600"/>
<attribute name="VALUE"/>
</element>
<element name="D1" library="Chong" package="DO214AA" value="SSB43L-E3">
<attribute name="NAME"/>
<attribute name="PARTNO" value="SSB43L-E3/52T"/>
<attribute name="VALUE"/>
</element>
<element name="R7" library="SparkFun-Passives" package="0603-RES" value="2.55k">
<attribute name="NAME"/>
<attribute name="PARTNO" value="ERJ-3EKF2551V"/>
<attribute name="VALUE"/>
</element>
<element name="C10" library="SparkFun-Passives" package="1210" value="22uF">
<attribute name="NAME"/>
<attribute name="PARTNO" value="TLJA476M010R0600"/>
<attribute name="VALUE"/>
</element>
<element name="C12" library="SparkFun-Passives" package="1206" value="10uF">
<attribute name="NAME"/>
<attribute name="PARTNO" value="TLJA476M010R0600"/>
<attribute name="VALUE"/>
</element>
<element name="J1" library="Analog Devices iSensors" package="A3-16PA-2SV(71)-TOP" value="A3-16PA-2SV(71)T">
<attribute name="NAME"/>
<attribute name="PARTNO" value="A3-16PA-2SV(71)"/>
<attribute name="VALUE"/>
</element>
<element name="J7" library="SparkFun-Connectors" package="1X03@1" value="">
<attribute name="NAME"/>
<attribute name="PARTNO" value="68000-103HLF"/>
<attribute name="VALUE"/>
</element>
<element name="D2" library="Chong" package="DO214AA" value="SSB43L-E3">
<attribute name="NAME"/>
<attribute name="PARTNO" value="SSB43L-E3/52T"/>
<attribute name="VALUE"/>
</element>
<element name="L1" library="AnalogDevices" package="CLF6045-H" value="CLF6045T-6R8N-H">
<attribute name="NAME"/>
<attribute name="PARTNO" value="CLF6045T-6R8N-H"/>
<attribute name="VALUE"/>
</element>
<element name="J9" library="SparkFun-Connectors" package="SCREWTERMINAL-3.5MM-2" value="3V3 EXT">
<attribute name="NAME"/>
<attribute name="PARTNO" value="20020327-C021B01LF"/>
<attribute name="PROD_ID" value="CONN-08399"/>
<attribute name="VALUE"/>
</element>
<element name="U2" library="Chong" package="SOT23-6" value="SIP32510">
<attribute name="NAME"/>
<attribute name="PARTNO" value="SIP32510DT-T1-GE3"/>
<attribute name="VALUE"/>
</element>
<element name="J10" library="SparkFun-Connectors" package="1X03" value="">
<attribute name="NAME"/>
<attribute name="PARTNO" value="68000-103HLF"/>
<attribute name="VALUE"/>
</element>
<element name="J11" library="SparkFun-Connectors" package="1X02@1" value="M02PTH">
<attribute name="NAME"/>
<attribute name="PARTNO" value="68000-103HLF"/>
<attribute name="VALUE"/>
</element>
<element name="DRILEGEND" library="drilegend" package="DRILEGEND" value=""/>
</elements>
<signals>
<signal name="SCL">
<contactref element="J3" pad="19"/>
<contactref element="J2" pad="SCL"/>
<contactref element="SJ2" pad="3"/>
</signal>
<signal name="SDA">
<contactref element="J2" pad="SDA"/>
<contactref element="J3" pad="18"/>
<contactref element="SJ1" pad="3"/>
</signal>
<signal name="3.3V">
<contactref element="J2" pad="3.3V"/>
<contactref element="J3" pad="3.3V"/>
<contactref element="J4" pad="2"/>
<contactref element="R5" pad="2"/>
<contactref element="C9" pad="1"/>
<contactref element="C10" pad="1"/>
<contactref element="L1" pad="P$1"/>
<contactref element="J10" pad="1"/>
</signal>
<signal name="GND">
<contactref element="J2" pad="GND@1"/>
<contactref element="J2" pad="GND@2"/>
<contactref element="J2" pad="GND@0"/>
<contactref element="J3" pad="GND1"/>
<contactref element="J3" pad="GND"/>
<contactref element="J4" pad="6"/>
<contactref element="J3" pad="AGND"/>
<contactref element="J5" pad="1"/>
<contactref element="C7" pad="2"/>
<contactref element="U1" pad="7"/>
<contactref element="D1" pad="A"/>
<contactref element="U1" pad="EP"/>
<contactref element="R6" pad="1"/>
<contactref element="C9" pad="2"/>
<contactref element="C10" pad="2"/>
<contactref element="C12" pad="2"/>
<contactref element="J8" pad="2"/>
<contactref element="J1" pad="7"/>
<contactref element="J1" pad="8"/>
<contactref element="J1" pad="9"/>
<contactref element="U2" pad="4"/>
<contactref element="J9" pad="2"/>
</signal>
<signal name="RX">
<contactref element="J2" pad="RX"/>
<contactref element="J3" pad="0"/>
</signal>
<signal name="TX">
<contactref element="J2" pad="TX"/>
<contactref element="J3" pad="1"/>
</signal>
<signal name="RESET">
<contactref element="J4" pad="5"/>
<contactref element="J2" pad="RES"/>
</signal>
<signal name="MOSI">
<contactref element="J3" pad="11"/>
<contactref element="J2" pad="D11"/>
<contactref element="J4" pad="4"/>
<contactref element="J1" pad="6"/>
</signal>
<signal name="A4">
<contactref element="J2" pad="A4"/>
<contactref element="SJ1" pad="2"/>
</signal>
<signal name="A10">
<contactref element="J3" pad="A10"/>
</signal>
<signal name="A11">
<contactref element="J3" pad="A11"/>
</signal>
<signal name="A5">
<contactref element="SJ2" pad="2"/>
<contactref element="J2" pad="A5"/>
</signal>
<signal name="SCK">
<contactref element="J2" pad="D13"/>
<contactref element="J4" pad="3"/>
<contactref element="J3" pad="13"/>
<contactref element="J1" pad="2"/>
</signal>
<signal name="MISO">
<contactref element="J2" pad="D12"/>
<contactref element="J4" pad="1"/>
<contactref element="J3" pad="12"/>
<contactref element="J1" pad="4"/>
</signal>
<signal name="CS">
<contactref element="J2" pad="D10"/>
<contactref element="J3" pad="10"/>
<contactref element="J1" pad="3"/>
</signal>
<signal name="D2">
<contactref element="J2" pad="D2"/>
<contactref element="J3" pad="2"/>
<contactref element="J1" pad="13"/>
</signal>
<signal name="D3">
<contactref element="J2" pad="D3"/>
<contactref element="J3" pad="3"/>
<contactref element="J1" pad="14"/>
</signal>
<signal name="D4">
<contactref element="J2" pad="D4"/>
<contactref element="J3" pad="4"/>
<contactref element="J1" pad="15"/>
</signal>
<signal name="D5">
<contactref element="J2" pad="D5"/>
<contactref element="J3" pad="5"/>
<contactref element="J1" pad="16"/>
</signal>
<signal name="D6">
<contactref element="J2" pad="D6"/>
<contactref element="J3" pad="6"/>
<contactref element="J1" pad="1"/>
</signal>
<signal name="D7">
<contactref element="J2" pad="D7"/>
<contactref element="J3" pad="7"/>
<contactref element="U2" pad="3"/>
</signal>
<signal name="D8">
<contactref element="J2" pad="D8"/>
<contactref element="J3" pad="8"/>
</signal>
<signal name="D9">
<contactref element="J2" pad="D9"/>
<contactref element="J3" pad="9"/>
</signal>
<signal name="A0">
<contactref element="J2" pad="A0"/>
<contactref element="J3" pad="14"/>
</signal>
<signal name="A1">
<contactref element="J2" pad="A1"/>
<contactref element="J3" pad="15"/>
</signal>
<signal name="A2">
<contactref element="J2" pad="A2"/>
<contactref element="J3" pad="16"/>
</signal>
<signal name="A3">
<contactref element="J2" pad="A3"/>
<contactref element="J3" pad="17"/>
</signal>
<signal name="AREF">
<contactref element="J3" pad="AREF"/>
<contactref element="J2" pad="AREF"/>
</signal>
<signal name="RTC_BATT">
<contactref element="J3" pad="VBAT"/>
<contactref element="J5" pad="2"/>
</signal>
<signal name="VIN">
<contactref element="J2" pad="VIN"/>
<contactref element="J8" pad="1"/>
<contactref element="J7" pad="1"/>
</signal>
<signal name="5V">
<contactref element="J2" pad="5V"/>
<contactref element="D2" pad="A"/>
<contactref element="J3" pad="VUSB"/>
</signal>
<signal name="A8">
<contactref element="J3" pad="22"/>
</signal>
<signal name="A9">
<contactref element="J3" pad="23"/>
</signal>
<signal name="PROG">
<contactref element="J3" pad="PROG"/>
<contactref element="J6" pad="2"/>
</signal>
<signal name="A6">
<contactref element="SJ1" pad="1"/>
<contactref element="J3" pad="20"/>
</signal>
<signal name="A14/DAC">
<contactref element="J3" pad="A14/DAC"/>
<contactref element="J6" pad="1"/>
</signal>
<signal name="A7">
<contactref element="SJ2" pad="1"/>
<contactref element="J3" pad="21"/>
</signal>
<signal name="N$4">
<contactref element="U1" pad="1"/>
<contactref element="C8" pad="1"/>
</signal>
<signal name="N$2">
<contactref element="U1" pad="5"/>
<contactref element="R5" pad="1"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$3">
<contactref element="U1" pad="8"/>
<contactref element="C8" pad="2"/>
<contactref element="D1" pad="C"/>
<contactref element="L1" pad="P$2"/>
</signal>
<signal name="N$5">
<contactref element="U1" pad="3"/>
<contactref element="C7" pad="1"/>
<contactref element="R7" pad="1"/>
</signal>
<signal name="N$6">
<contactref element="R7" pad="2"/>
<contactref element="C12" pad="1"/>
<contactref element="U1" pad="2"/>
<contactref element="J7" pad="2"/>
</signal>
<signal name="N$7">
<contactref element="J7" pad="3"/>
<contactref element="D2" pad="C"/>
</signal>
<signal name="N$8">
<contactref element="U2" pad="1"/>
<contactref element="U2" pad="2"/>
<contactref element="J1" pad="11"/>
<contactref element="J1" pad="12"/>
<contactref element="J1" pad="10"/>
<contactref element="J11" pad="1"/>
</signal>
<signal name="N$10">
<contactref element="J9" pad="1"/>
<contactref element="J10" pad="3"/>
</signal>
<signal name="N$11">
<contactref element="J10" pad="2"/>
<contactref element="U2" pad="6"/>
<contactref element="U2" pad="5"/>
<contactref element="J11" pad="2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
