Contributed by Adafruit Product Page <a href="https://www.adafruit.com/product/2651">here</a> Github Repo <a href="https://github.com/adafruit/Adafruit-BMP280-Breakout-PCB">here</a> This is a barometric pressure and temperature sensor breakout board Small Outline Transistor - 5 Pin >NAME >VALUE >NAME >VALUE 0603-Mini Mini footprint for dense boards >NAME >VALUE >NAME >VALUE 0402 >NAME >VALUE 0402 MicroPitch >NAME >VALUE 0603 >NAME >VALUE 0603 MicroPitch >NAME >VALUE 0805 >NAME >VALUE 0805 MicroPitch >NAME >VALUE >NAME >VALUE >NAME >VALUE >NAME >VALUE >NAME >VALUE PIN HEADER >NAME >VALUE >NAME >VALUE >NAME >VALUE >NAME >VALUE Source: http://ae-bst.resource.bosch.com/media/products/dokumente/bme280/BST-BME280_DS001-09.pdf >NAME >VALUE SOT23 - Reflow soldering >NAME >VALUE SOT23 - Wave soldering >NAME >VALUE >NAME >VALUE POWER-PAK 1212-8 >NAME >VALUE SMD D-PAK 1 2 3 4 >NAME >VALUE SMALL OUTLINE TRANSISTOR TS-003 >NAME >VALUE >NAME >VALUE RESISTOR 2512 (Metric 6432) >NAME >VALUE SMA Surface Mount Diode >NAME >VALUE >Name >Value SOD-523 (0.8x1.2mm) Source: http://www.rohm.com/products/databook/di/pdf/rb751s-40.pdf >NAME >VALUE SOD323 (2.5x1.2mm) >NAME >VALUE SOD-123 Source: http://www.diodes.com/datasheets/ds30139.pdf >NAME >VALUE >NAME >VALUE >VALUE >NAME >VALUE >NAME >VALUE >NAME >VALUE >NAME >VALUE BME280 Digital Environ. Sensor VDD: 1.8-3.6V Temp: -40~85�°C >VALUE >VALUE >NAME >VALUE D S G >NAME >VALUE >NAME >VALUE GND SOT23-5 Fixed Voltage Regulators <table width="700"> <tr bgcolor="#EEEEEE" > <td>Part</td> <td>Current Out</td> <td>V Out</td> <td>V In</td> <td>V Dropout</td> <td>θJA (�°C/W)</td> <td>TJ (�°C)</td> <td>Digikey Part No.</td> </tr> <tr> <td>ADP121</td> <td>150mA</td> <td>3.3V</td> <td>3.4-5.5V</td> <td>0.09V @ 150mA</td> <td>--</td> <td>--</td> <td>ADP121-AUJZ33R7CT-ND</td> </tr> <tr> <td>ADP121</td> <td>150mA</td> <td>3.0V</td> <td>3.1-5.5V</td> <td>0.09V @ 150mA</td> <td>--</td> <td>--</td> <td>ADP121-AUJZ30R7CT-ND</td> </tr> <tr> <td>ADP122</td> <td>300mA</td> <td>3.3V</td> <td>3.4-5.5V</td> <td>0.085V @ 300mA</td> <td>--</td> <td>--</td> <td>ADP122AUJZ-3.3-R7CT-ND</td> </tr> <tr> <td>ADP1712</td> <td>300mA</td> <td>3.3V</td> <td>3.5-5.5V</td> <td>0.17V @ 300mA</td> <td>--</td> <td>--</td> <td>ADP1712AUJZ-3.3-R7TR-ND</td> </tr> <tr> <td>AP7311 (Low Cost)</td> <td>150mA</td> <td>3.3V</td> <td>3.5-6V</td> <td>0.15V @ 150mA</td> <td>--</td> <td>--</td> <td>AP7311-33WG-7DICT-ND</td> </tr> <tr> <td>LD39015M18R</td> <td>150mA</td> <td>1.8V</td> <td>1.9V-5.5V</td> <td>0.08V @ 100mA</td> <td>--</td> <td>--</td> <td>497-6977-1-ND</td> </tr> <tr> <td>LP2985A-33DBVR</td> <td>150mA</td> <td>3.3V</td> <td>3.3-16V</td> <td>0.28V @ 150mA</td> <td>206</td> <td>150</td> <td>296-18479-1-ND</td> </tr> <tr> <td>MCP1824T-3302E/OT</td> <td>300mA</td> <td>3.3V</td> <td>3.5V-6V</td> <td>0.2V @ 300mA</td> <td>--</td> <td>--</td> <td>MCP1824T-3302E/OTCT-ND</td> </tr> <tr> <td>MIC5205-2.5YM5 TR</td> <td>150mA</td> <td>2.5V</td> <td>2.7-16V</td> <td>0.165V @ 150mA</td> <td>--</td> <td>--</td> <td>576-1257-2-ND</td> </tr> <tr> <td>MIC5205-3.0YM5 TR</td> <td>150mA</td> <td>3.0V</td> <td>3.2V-16V</td> <td>0.165V @ 150mA</td> <td>--</td> <td>--</td> <td>576-1258-2-ND</td> </tr> <tr> <td>MIC5205-3.3YM5 TR</td> <td>150mA</td> <td>3.3V</td> <td>3.5V-16V</td> <td>0.165V @ 150mA</td> <td>--</td> <td>--</td> <td>576-1259-2-ND</td> </tr> <tr> <td>TPS780330220</td> <td>150mA</td> <td>3.3V+2.2V</td> <td>3.6-5.5V</td> <td>250mV Max</td> <td>--</td> <td>--</td> <td>296-23332-1-ND</td> </tr> <tr> <td>TDA3663/N1,135</td> <td>100mA</td> <td>3.3V</td> <td>3.5-45V</td> <td>0.18V @ 50mA</td> <td>--</td> <td>--</td> <td>568-5343-1-ND</td> </tr> <tr> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> </tr> <tr> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> </tr> </table> Max operating temp can be calculated using θJA, TJ (max junction temperature), and power in watts. Set the "Maximum Ambient Temperature" until it reaches TJ ("Max Junction Temperature"), which is the absolute limit for safe use of the regulator: <a href="http://www.daycounter.com/Calculators/Heat-Sink-Temperature-Calculator.phtml">Heat Sink Temperature Calculator</a> For example, With 12V source into a 3.3V LP2985 and a 30mA load, we are dissipating (12V-3.3V) * 0.03A = 0.261W. With a θJA of 206 �°C/W, a TJ of 150�°C, and 261mW we can safely use the chip without a heat sink up to 75�°C (=147.1�°C Junction Temperature). Ceramic Capacitors For new designs, use the packages preceded by an '_' character since they are more reliable: The following footprints should be used on most boards: <ul> <li>_0402 - Standard footprint for regular board layouts</li> <li>_0603 - Standard footprint for regular board layouts</li> <li>_0805 - Standard footprint for regular board layouts</li> <li>_1206 - Standard footprint for regular board layouts</li> </ul> For extremely tight-pitch boards where space is at a premium, the following 'micro-pitch' footprints can be used (smaller pads, no silkscreen outline, etc.): <ul> <li>_0402MP - Micro-pitch footprint for very dense/compact boards</li> <li>_0603MP - Micro-pitch footprint for very dense/compact boards</li> <li>_0805MP - Micro-pitch footprint for very dense/compact boards</li> <li>_1206MP - Micro-pitch footprint for very dense/compact boards</li> </ul> PIN HEADER BME280 - Environmental Sensor (I2C + SPI) 5.0V Supply 3.3V Supply N-Channel Mosfet LEGEND VDS: Voltage Drain-Source ID: Drain Current RDS(ON): Drain-Source On-State Resistance VGS(TH): Gate-Source Threshold Voltage CISS: Drain-Source Input Capacitance SOT-23 <table border="0" width="90%" cellspacing="0" cellpadding="5"> <tr bgcolor="#DDDDDD"> <td>Name</td> <td>VDS</td> <td>ID</td> <td>RDS(ON)</td> <td>VGS(TH)</td> <td>CISS</td> <td>Order Number</td> </tr> <tr> <td>2N7002E</td> <td>60V</td> <td>260mA</td> <td>2.5 Ohm</td> <td>2.5V @ 250uA</td> <td>26.7pF @ 25V</td> <td>2N7002ET1GOSTR-ND</td> </tr> <tr> <td>BSH103</td> <td>30V</td> <td>850mA</td> <td>400 mOhm</td> <td>400mV @ 1mA</td> <td>83pF @ 24V</td> <td>BSH103,235-ND</td> </tr> <tr> <td>BSS138</td> <td>60V</td> <td>320mA</td> <td>1.6 Ohm</td> <td>1.5V @ 250uA</td> <td>50pF @ 10V</td> <td>Mouser: 771-BSS138PW115</td> </tr> <tr> <td>DMN2075U-7</td> <td>20V</td> <td>4.2A</td> <td>38 mOhm</td> <td>1V @ 250 uA</td> <td>594.3pF @ 10V</td> <td>DMN2075U-7DICT-ND</td> </tr> <tr> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> <td></td> </tr> </table> * BSS138 good choice for I2C level-shifting POWERPAK 1212-8 <table border="0" width="90%" cellspacing="0" cellpadding="5"> <tr bgcolor="#DDDDDD"> <td>Name</td> <td>VDS</td> <td>ID</td> <td>RDS(ON)</td> <td>VGS(TH)</td> <td>CISS</td> <td>Order Number</td> </tr> <tr> <td>Si7308DN</td> <td>60V</td> <td>6A</td> <td>58 mOhm</td> <td>3V @ 250uA</td> <td>665pF @ 15V</td> <td>SI7308DN-T1-E3CT-ND</td> </tr> </table> Resistors For new designs, use the packages preceded by an '_' character since they are more reliable: The following footprints should be used on most boards: <ul> <li>_0402 - Standard footprint for regular board layouts</li> <li>_0603 - Standard footprint for regular board layouts</li> <li>_0805 - Standard footprint for regular board layouts</li> <li>_1206 - Standard footprint for regular board layouts</li> </ul> For extremely tight-pitch boards where space is at a premium, the following 'micro-pitch' footprints can be used (smaller pads, no silkscreen outline, etc.): <ul> <li>_0402MP - Micro-pitch footprint for very dense/compact boards</li> <li>_0603MP - Micro-pitch footprint for very dense/compact boards</li> <li>_0805MP - Micro-pitch footprint for very dense/compact boards</li> <li>_1206MP - Micro-pitch footprint for very dense/compact boards</li> </ul> Diode <h3>SMA</h3> <table cellpadding="5" width="600"> <tr bgcolor="#DDDDDD"> <td>Model</td> <td>Volts</td> <td>Amps</td> <td>Type</td> <td>Vf</td> <td>Ir</td> <td>Digikey #</td> <td>Notes</td> </tr> <tr> <td>SSA34-E3</td> <td>40V</td> <td>3A</td> <td>Schottky</td> <td>480mV @ 3A</td> <td>200uA @ 40V</td> <td>SSA34-E3/61TGITR-ND</td> <td></td> </tr> <tr> <td>CDBA120-G</td> <td>20V</td> <td>1A</td> <td>Schottky</td> <td>500mV @ 1A</td> <td>500uA @ 20V</td> <td>641-1014-6-ND</td> <td>REEL</td> </tr> <tr> <td>MBRA210</td> <td>10V</td> <td>2A</td> <td>Schottky</td> <td>350mV @ 2A</td> <td>700uA @ 10V</td> <td>MBRA210LT3</td> <td></td> </tr> </table> <h3>SOD-123</h3> <table cellpadding="5" width="600"> <tr bgcolor="#DDDDDD"> <td>Model</td> <td>Volts</td> <td>Amps</td> <td>Type</td> <td>Vf</td> <td>Ir</td> <td>Order #</td> <td>Notes</td> </tr> <tr> <td>BAT54T1G</td> <td>30V</td> <td>200mA</td> <td>Schottky</td> <td>800mV @ 200mA</td> <td>2uA @ 25V</td> <td>BAT54T1GOSTR-ND</td> <td></td> </tr> <tr> <td>B0530W</td> <td>30V</td> <td>500mA</td> <td>Schottky</td> <td>430mV @ 500mA</td> <td>130uA @ 30V</td> <td>B0530W-FDICT-ND</td> <td>REEL</td> </tr> <tr> <td>MBR120</td> <td>20V</td> <td>1A</td> <td>Schottky</td> <td>340mV @ 1A</td> <td></td> <td>MBR120VLSFT1GOSCT-ND</td> <td></td> </tr> </table> <h3>SOD-323</h3> <table cellpadding="5" width="600"> <tr bgcolor="#DDDDDD"> <td>Model</td> <td>Volts</td> <td>Amps</td> <td>Type</td> <td>Vf</td> <td>Ir</td> <td>Order #</td> <td>Notes</td> </tr> <tr> <td>PMEG2005EJ</td> <td>20V</td> <td>500mA</td> <td>Schottky</td> <td>355mV @ 500mA</td> <td></td> <td>568-4110-1-ND</td> <td></td> </tr> <tr> <td>ZLLS410</td> <td>10V</td> <td>570mA</td> <td>Schottky</td> <td>380mV @ 570mA</td> <td></td> <td>ZLLS410CT-ND</td> <td></td> </tr> <tr> <td>1N4148WS</td> <td>75V</td> <td>150mA</td> <td>Silicon/Simple</td> <td>1V</td> <td></td> <td>1N4148WSFSCT-ND</td> <td>REEL</td> </tr> </table> <h3>SOD-523</h3> <table cellpadding="5" width="600"> <tr bgcolor="#DDDDDD"> <td>Model</td> <td>Volts</td> <td>Amps</td> <td>Type</td> <td>Vf</td> <td>Ir</td> <td>Order #</td> <td>Notes</td> </tr> <tr> <td>BAT54XV2</td> <td>30V</td> <td>200mA</td> <td>Schottky</td> <td>0.8V @ 100mA</td> <td></td> <td>BAT54XV2CT-ND</td> <td></td> </tr> <tr> <td>TB751S</td> <td>30V</td> <td>30mA</td> <td>Schottky</td> <td></td> <td></td> <td>RB751S-40TE61CT-ND</td> <td></td> </tr> </table> <h3>SOT23-R/W</h3>(R = Solder Paste/Reflow Ovens, W = Hand-Soldering) <table cellpadding="5" width="600"> <tr bgcolor="#DDDDDD"> <td>Model</td> <td>Volts</td> <td>Amps</td> <td>Type</td> <td>Vf</td> <td>Ir</td> <td>Order #</td> <td>Notes</td> </tr> <tr> <td>BAT54FILM</td> <td>40V</td> <td>300mA</td> <td>Schottky</td> <td></td> <td></td> <td>497-7162-1-ND</td> <td></td> </tr> </table> <h3>POWERDI-5</h3> <table cellpadding="5" width="600"> <tr bgcolor="#DDDDDD"> <td>Model</td> <td>Volts</td> <td>Amps</td> <td>Type</td> <td>Vf</td> <td>Ir</td> <td>Order #</td> <td>Notes</td> </tr> <tr> <td>PDS560</td> <td>60V</td> <td>5A</td> <td>Schottky</td> <td>670mV @ 5A</td> <td>150uA @ 60V</td> <td>PDS560DICT-ND</td> <td></td> </tr> </table> For SPI set CSB low at startup SDO=MISO, SDI=MOSI, SCK=SCK, CSB=CS/SSEL For I2C leave CSB pulled high (default value) SDI=SDA, SCK=SCL LEVEL SHIFTING (5V <--> 3V) BMP280 Barometric Pressure Temperature Sensor Vin/Vlogic: 3-5V adafruit! VIN 3Vo GND SCK SDO SDI CS SPI or I2C Pressure & Temp Sensor BMP280 Small Outline Transistor - 5 Pin >NAME >VALUE >NAME >VALUE Source: http://ae-bst.resource.bosch.com/media/products/dokumente/bme280/BST-BME280_DS001-09.pdf >NAME >VALUE >NAME >VALUE 0805 MicroPitch >NAME >VALUE >NAME >VALUE SOD323 (2.5x1.2mm) >NAME >VALUE EAGLE Design Rules Die Standard-Design-Rules sind so gewählt, dass sie für die meisten Anwendungen passen. Sollte ihre Platine besondere Anforderungen haben, treffen Sie die erforderlichen Einstellungen hier und speichern die Design Rules unter einem neuen Namen ab. Adafruit board design rules <ul> <li>Smallest drill: 16mm</li> <li>Min trace: 10mil</li> <li>Min spacing: 8mil</li> <li>Dimension spacing: 10mil</li> <li>Tenting for vias</li> <li>Angle check on</li> </ul>