SDA t SUSDAT t t t BUS LOW HDSTA SCL t t t t t HDSTA HDDAT HIGH SUSTA SUSTO LP Series Digital DATA SHEET LP Series Digital 2 MERIT SENSOR 1420 I C COMMUNICATION LP Series - Digital is a surface mountable pressure sensor package with a Communications to the 1420 is read only. To read the pressure counts, the master performs a read request by asserting a start condition, sending the 7 bit address of the part (If the part has an open address, 7 bits of anything is acceptable), compensated digital output suitable for ultra-low pressure sensing applications. and sets the read/write bit. The master then waits for an acknowledgment. The acknowledgment is sent by the pressure sensor along with 2 bits of status and bits 13:8 of the pressure counts, the master acknowledges the first 8 bits, and the pressure sensor sends the remaining 8 bits of data. The Master then does not acknowledge and sends a stop condition COMPANY: Merit Sensor is a leader in piezoresistive signaling the end of the transaction. pressure sensing and partners with clients to create high performing solutions for a variety of applications and industries. MASTER MASTER SLAVE SLAVE MASTER S 6 5 4 3 2 1 0 RW A SB SB 13 12 11 10 9 8 A 7 6 5 4 3 2 1 0 N ST SENTIUM: Merit Sensor products incorporate a proprietary ------------DEVICE ADDRESS-------------------/ ---------SENSOR DATA 13:8 ----------/ ----------------SENSOR DATA 7:0 ------------------/ Sentium technology developed to provide superior stability. TECHNOLOGY: Merit Sensor utilizes a piezoresistive Wheatstone S Start Conditioning Device Slave Address Data Bit Status Bits 0 0 Normal Operation, Good Packet bridge in a design that anodically bonds glass to a chemically etched RW Read/Write Bit A Acknowledge Bit N No Acknowledge Bit 0 1 Device in Command Mode silicon diaphragm. All products are RoHS compliant. 1 0 Stale Data 1 1 Diagnostic Condition Exsists ST Stop Condition SB Status Bits CAPABILITIES: Merit Sensor designs, engineers, fabricates, dices, assembles, tests, and sells die and packaged products from *Used by permission, IDT a state-of-the-art facility near Salt Lake City, Utah. TRANSFER FUNCTION EXAMPLES FEATURES Example 1: 0.15 PSI Gage Pressure 0.04 to 15 psi (2.5 mbar to 1 bar 250 Pa to Part: 1420-P15G-xx11-111 Range 100 kPa KPa 1 in H O to 415 in H O) 2 2 0.16875 Part: 1420-P15G-xx11-111 Calibrated Range (Pressure) 0.15 2 Output Digital I C Pmin =0.0 PSI 1420 Family Part Number Configurator 0.13125 Pmax =0.15 PSI 0.1125 Type Gage, Differential and Absolute Pcounts =7215 1420-XXXX-XX11-XX1 0.09375 Media Clean, Dry Air and Non-corrosive Gases Pressure 0.075 Max =16384 P04 = 250 Pa 0.05625 0.1 Max Pcounts Packaging Tape and Reel Pin Type P07 = 500 Pa Ppsi = (Pmax Pmin + Pmin 0.0375 0.8 Max 1 = J-lead P15 = .15psi 0.01875 Customization Supply Voltage, Temperature Calibration Range, P30 = .30psi 7215 0.1 16384 Port PPsi = (0.15 0.0 + 0 0 Output Range, Accuracy Specification, 1P0 = 1.0psi 0.8 16384 1 = Dual -0.01875 15P = 15psi Update Rate, etc horizontal, 0 1638 3276 4914 6552 8190 9828 11466 13104 14742 16380 PPsi = .0638 Psi facing same Counts Reference direction BENEFITS D = Differential 2 = Single G = Gage Horizontal Example 2: -.5 to .5 PSI Differential Part: 1420-P50D-xx11-111 Performance Enjoy best-in-class performance due to Merits A = Absolute 0.625 Calibrated Range (Pressure) proprietary Sentium technology Calibrated Part: 1420-P50D-xx11-111 0.5 Clock Speed Supply Voltage 0.375 1 = 1MHz Pmin = -0.5 PSI Cost Save money over time with high-performing die 1 = 5.0V 0.25 2 = 3.3V Pmax = 0.5 PSI 2 I C Address 0.125 Security Feel confident doing business with an experienced Pcounts =8192 0 = 0x28 0 company backed by a solid parent company Update Rate 1 = 0x38 -0.125 Max =16384 1 = 25ms (NASDAQ: MMSI) 2 = 0x48 -0.25 0.1 Max Pcounts 3 = 0x58 Ppsi = (Pmax Pmin + Pmin Operation Mode 0.375 Speed Get to market quickly with creative and 0.8 Max 4 = 0x68 1 = Update mode -0.5 flexible solutions 5 = 0x78 constant 8192 0.1 16384 -0.625 P = 0.5 0.5 Psi ( ( + 6 = Open* 0.5 ( 0 1638 3276 4914 6552 8190 9828 11466 13104 14742 16380 0.8 16384 Service Experience prompt, personal and Counts professional support P = 0.0 Psi Psi *Device will respond to any address. Sales +1 801.208.4722 Customer Service +1 801.208.4700 Fax +1 801.208.4798 sales meritsensor.com www.MeritSensor.com Sales +1 801.208.4722 Customer Service +1 801.208.4700 Fax +1 801.208.4798 sales meritsensor.com www.MeritSensor.com 1600 W. Merit Parkway South Jordan, Utah 84095 USA 1600 W. Merit Parkway South Jordan, Utah 84095 USA 1420seriesDS.014 PSI PSI ( ( ( ( ( (image002.png LP Series Digital LP Series Digital SPECIFICATIONS Parameter Minimum Typical Maximum Units Notes DIMENSIONS FOR STANDARD OPTIONS (in millimeters) Electrical Dimensions for reference only. Engineering drawings (with tolerance) available upon order. Depending on calibrated supply voltage Supply Voltage (Vs) 4.5 5 5.5 V 2.5 2.5 Depending on calibrated supply voltage Supply Voltage (Vs) 3.0 3.3 3.6 V 3.6 2.5 2.5 3.6 2.5 2.5 Supply Current 1.2 2 3.5 (1) mA 8 7 6 5 8 7 6 5 8 7 6 5 Operating Temperature -40 85 C 8 7 6 5 Notes: 2.2 Storage Temperature -55 100 C 2.2 (1) 5V input voltage, 12.7 11.3 12.7 11.3 Performance (2) Over 0C to 60C 11.4 11.4 (3) Applicable if Vs = 5% of Effective ADC Resolution 13 Bits the calibrated Vs 1 23 4 Pressure Accuracy -1.5 1.5 %FS (2) (3) (4) Full scale pressure 1 23 4 2.5 23 4 1.9 1 Long-Term Stability -0.5 0.5 %FS 2.5 10.2 23 4 1.9 1 10.2 Startup Time 10.4 12 ms 1.3 Digital Update Time 21 25 29 ms Device Pinout SMT Landing Pad Layout 1.3 SMT Landing Pad Layout 8.4 P1 = Vs Proof Pressure 5X (4) 8.4 P2 = N/C Burst Pressure 10X P3 = N/C Where Transfer Function Formula P4 = VSS - Ground Ppsi = Measured Pressure in PSI 0.1 Max 2.5 2.5 P5 = N/C P counts Pcounts = Pressure Counts from Merit Sensor Part P = (P P + P psi max min min 2.5 2.5 2.5 P6 = N/C 0.8 Max PMin = Minimum Pressure 2.5 2 P7 = SDA - I C data PMax = Maximum Pressure Media Compatibility 2 P8 = SCL - I C clock Max = 16384 = 14 Bits For Use With Non-corrosive Dry Gasses Solder temperature: max 250 C, 5 seconds max CROSS SECTION FOR DIFFERENTIAL AND GAGE CROSS SECTION FOR ABSOLUTE 2 I C PARAMETERS * MEMS sensing element (differential pressure) Parameter Symbol Min Typ Max Units Soft die attach material Cover/mechanical protection SCL clock frequency fSCL - 100 kHz Start condition hold time relative to SCL edge tHDSTA 0.1 s 1 Integrated signal Minimum SCL clock low width tLOW 0.6 s Conditionioning 1 (ASIC) Minimum SCL clock high width tHIGH 0.6 s Media inlet ports Start condition setup time relative to SCL edge tSUSTA 0.1 s Filter capacitor Data hold time on SDA relative to SCL edge tHDDAT 0.0 s Data setup time on SDA relative to SCL edge tSUDAT 0.1 s Stop condition setup time on SCL tSUSTO 0.1 s Bus free time between stop condition and start condition tBUS 2 s Electrical connections 1Combined low and high widths must equal or exceed minimum SCLK period. PACKAGING ELECTRICAL Note: Power supply decoupling included 2 16.0mm I C TIMING DIAGRAM* 1 Vs SDA 32.0mm SCL 8 t SUSDAT Digital out SDA 7 t t t BUS HDSTA LOW SSC SCL 2.0mm Gnd t t t t t HDSTA HDDAT HIGH SUSTA SUSTO 4.0mm 4 MASTER SLAVE MASTER SLAVE MASTER S 6 5 4 3 2 1 0 RW A SB SB 13 12 11 10 9 8 A 7 6 5 4 3 2 1 0 N ST ------------DEVICE ADDRESS-------------------/ ---------SENSOR DATA 13:8 ----------/ ----------------SENSOR DATA 7:0 ------------------/ S Data Bit Status Bits Start Conditioning Device Slave Address 0 0 Normal Operation, Good Packet RW Read/Write Bit A Acknowledge Bit N No Acknowledge Bit 0 1 Device in Command Mode 1 0 Stale Data Diagnostic Condition Exsists ST Stop Condition SB Status Bits 1 1 (