npx1 novasensor sensors the npx1 sensor represents the next generation of remote tire pressure monitoring (rtpm). npx1 sensor adds a silicon pressure sensor, a 8-bit risc processor, and an lf-input stage to meet market demands for flexible, customer specific behavior/solutions and overall system cost reduction. a programmable version of the sensor is available, allowing the customer to download the application code in an electrically programmable rom version. this sensor is intended for developing the application specific program. in order to ensure high reliability, the npx1 sensor has the measurement routines (pressure, temperature, and supply voltage) implemented in rom. routines for lf reception and uhf transmission are also implemented in rom. features ? 12 bit adc ? 4k byte flash (e-rom) for user application ? 4k rom for library routines ? 128 byte ram ? 128 byte eeprom ? battery managementminimizing power consumption ? measure and compensate pressure, ? media compatibility with tire pressure media ? 450, 700, and 1400 kpa absolute pressure ranges custom ranges are available ? on chip temperature sensor ? on chip temperature shut down a mphenol advanced sensors
general operating temperature -40f to 257f (-40c to 125c) storage temperature -67f to 257f (-55c to 125c) battery supply voltage 2.1 to 3.6 v (3.0 v typical) supply current 600 na typical power down current at 3.6 v pressure ranges 100 to 450, 100 to 700, 0 to 1400 is typical 450 kpa resolution ? 1.37 kpa/lsb (450 kpa to 100 kpa/255) ? -40f to 257f (-40c to 125c) 700 kpa resolution ? 2.35 kpa/lsb (700 kpa to 100 kpa/255) ? -40f to 257f (-40c to 125c) 1400 kpa resolution ? 5.49 kpa/lsb (1400 kpa to 0 kpa/255) ? -40f to 257f (-40c to 125c) over pressure 10x pressure measurement measurement accuracy (2.1 to 3.6 v) ? -6 to 6 lsb (6fcapability), 32f to 122f (0c to 50c) ? -8 to 8 lsb, -40f to 257f (-40c to 125 c) charge consumption (all pressure ranges) 3.2 micro-coulombs; 77f (25c), 3v battery voltage measurement ? 6 lsb, -40f to 257f (-40c to 125c) ? 1 lsb = 10.8 mv/lsb ? 0.4 micro-coulombs charge consumption pressure measurement measurement accuracy (2.1 to 3.6 v) ? -6 to 6 lsb (6 capability), 32f to 122f (0c to 50c) ? -8 to 8 lsb, -40f to 257f (-40c to 125 c) charge consumption (all pressure ranges) 3.2 micro-coulombs; 77f (25c), 3v battery voltage measurement ? 6 lsb, -40f to 257f (-40c to 125c) ? 1 lsb = 10.8 mv/lsb ? 0.4 micro-coulombs charge consumption npx1 dimensions in [mm] .41 10.3 .24 6.0 .11 2.8 3.0 .12 .018 0.45 .06 1.5 .13 3.2 .37 9.5 1.27 .05 0.72 .028 .008 0.2 .01 0.15 1.0 .04 c l npx1 specifications
temperature measurement temperature range -40f to 257f (-40c to 125c) resolution 1.0 c/lsb; 401f -(-58f)/255 (205c -(-50c)/255) measurement accuracy (6ffcapability ? 10.8f (6c), -4f to 158f (-20c to 70c) ? 14.4f (8c), -40f to 257f (-40c to 125c) measurement charge consumption (77f (25c), 3.0 v) ? 0.8 micro-coulombs temperature maximum shtd represents the temperature at which the thermal shut-down function can be enabled and rel represents the temperature at which the master reset state is released. shtd ? 239f (115c) maximum ? 2.1 to 3.6 v ? thermal shut-down enabled rel ? 212f (100c) minimum ? 2.1 to 3.6 v ? master reset release voltage minimum the voltage at which the vmin-circuit will return a low battery voltage status is specified in vmin: vmin ? 2.0 to 2.2 v (2.1 v typical) ? -40f to 257f (-40c to 125c) transfer functions 450 kpa pressure p = 1.3725 x po + 100 p = pressure in kpa po = 8 bit scaled output pressure 700 kpa pressure p = 2.3529 x po + 100 p = pressure in kpa po = 8 bit scaled output pressure 1400 kpa pressure p = 5.490 x po p = pressure in kpa po = 8 bit scaled output pressure temperature t = to - 50 t = temperature in f (c) to = 8 bit scaled output temperature v battery v = 0.0108 x vo + 4 v = v battery in v vo = 8 bit scaled output vbattery v dd adc m u x l n a i/o p15 in+ in- out+ out - x c l r l o c k moc c h vss p10 in1 in2 in3 in4 motio n s witch ( o ptio nal) t imer m o dulat o r i n t errupt c o ntro l r c oscillat o r 4k erom 4k rom 128 byt e eeprom 128 byt e ram p ower management and w atchdog/int erv al timer 8 bit risc 2d-lf int erface sensor signal cond itioning mscl msd a asic pressure sensor transmitt er uhf p11 p17 p14 li 3v/3.6v npx1 npx1 block diagram npx1 specifications
detailed performance pin name function note 1 in4 lf receiver channel 2, negative input 2 p10 general purpose i/o with external wakeup feature, internal pull-up/pull-down 1 3 p11 general purpose i/o with externalwakeup feature, internal pull-up/pull-down 4 msda monitor serial data i/o with internal pull-up 3 5 mscl monitor serial clock output 3 6 vdd battery supply voltage (positive terminal) 7 nc 8 vss common ground (negative terminal) 9 p17 general purpose i/o or modulator for uhf transmitter 2 10 p15 general purpose i/o or external system clock reference input 11 p14 general purpose i/o or modulator for uhf transmitter 2 12 in1 lf receiver channel 1, positive input 13 in2 lf receiver channel 2, negative input 14 in3 lf receiver channel 2, positive input 1) p10/p11 inputs have internal pull-up and must be left unconnected if not in use. 2) the functions of p14 and p17 may be interchanged by software. 3) actual pad function determined by boot sequence. mscl is an output and must be unconnected in the application. msda feature an on-chip pull-up to vbat may be left open or terminated to vbat in the application. ordering information use this code when ordering npx-c017 code description shipping 67 450 kpa tape and reel 68 700 kpa tape and reel 69 1400 kpa tape and reel npx-co17 ___ - _t__ typical model number notice the customer has sole responsibility for designing and implementing a solution, which will ensure safe operation including review of appropriate reliability, required redundancy, mitigation of failure modes and meeting appropriate standards. the customer is responsible for review of any conditions for use including, but not limited to: environmental conditions, electrical supply and residual risk. aas-920-194b-03/2014 www.amphenol-sensors.com ? 2014 amphenol corporation. all rights reserved. specifications are subject to change without notice. other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. a mphenol advanced sensors npx1 specifications
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