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www.rfm.com e-mail: info@rfm.com page1of7 ? 2012 by rf monolithics, inc. dnt90mc/mp - 09/26/12 dnt90mc DNT90MP rating value units power supply input -0.5 to +6.5 v all input/output pins -0.5 to +3.3 v input power to rfio port 0 dbm non-operating ambient temperature range -40 to +85 o c dnt90mc/mp absolute maximum ratings dnt90mc/mp electrical characteristics characteristic sym notes minimum typical maximum units rf communication topology direct peer-to-peer spread spectrum mode frequency hopping operating frequency range 902.76 926.76 mhz number of rf channels 1 26 number of hopping patterns 64 hop duration 1 400 ms modulation fsk rf data transmission rate 100 kbps receiver sensitivity @ 10 -5 ber -100 dbm transmitter rf output power 1 40 or 158 mw mw antenna impedance 50 rf connection u.fl coaxial connector low cost 900 mhz fhss transceiver modules with i/o the dnt90mc and DNT90MP fhss transceiver modules provide a low-cost, versatile solution for wireless data communications in the 900 mhz ism band. direct peer-to-peer communication pro - vides very low transmission latency between all modules in a network. the dnt90mc/mp rf out - put power can be set at 40 or 158 mw. the dnt90mc/mp receiver input is protected by a low-loss saw filter, providing an excellent combination of receiver sensitivity and out-of-band interference rejection. the dnt90m module includes analog, digital and serial i/o, providing the flexibility to serve applications ranging from cable replacements to sensor networks. the dnt90mc/mp trans - ceiver module is easy to integrate and provides reliable wireless communications up to 5 miles in line-of-sight installations. - 900 mhz frequency hopping spread spectrum transceivers - direct peer-to-peer low latency communication - transmitter power configurable to 40 or 158 mw - 100 kbps rf data rate - serial port data rate up to 250 kbps, spi port data rate up to 500 kbps - 128-bit aes encryption - separate serial port for diagnostics - analog and digital i/o for sensor applications - fcc and canadian ic certified for unlicensed operation
notes: 1. the dnt90mc/mp achieves regulatory certification under fhss rules. 2. maximum sleep current occurs at +85 o c. www.rfm.com e-mail: info@rfm.com page2of7 ? 2012 by rf monolithics, inc. dnt90mc/mp - 09/26/12 characteristic sym notes minimum typical maximum units adc input range 0 2.7 v adc input resolution 12 bits adc sample rate 100 hz signal source impedance for adc reading 10 k adc external reference voltage range 1.0 2.7 v dac output range 0 3.3 v dac output resolution 12 bits primary and diagnostic serial port baud rates 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8, 38.4, 57.6, 115.2, 230.4, 250.0 kbps master serial peripheral interface data rate 125 250 500 kbps slave serial peripheral interface data rate 4000 kbps digital i/o: logic low input level -0.5 0.8 v logic high input level 2.45 3.3 v logic input internal pull-up resistor 20 k power supply voltage range v cc +3.3 +5.5 vdc power supply voltage ripple 10 mv p-p peak transmit mode current, 158 mw output 170 ma receive current 40 ma sleep current 2 3 6 a dnt90mc mounting reflow soldering DNT90MP mounting socket operating temperature range -40 85 o c operating relative humidity range, non-condensing 10 90 % dnt90mc/mp electrical characteristics caution: electrostatic sensitive device. observe precautions when handling.
dnt90mc/mp hardware the major components of the dnt90mc/mp modules in- clude an rfm trc103 900 mhz fhss transceiver and a low current 8-bit microcontroller. the dnt90mc/mp oper- ates in the 902 to 928 mhz ism band. the dnt90mc/mp hops across 26 frequency channels on one of 64 select- able hopping patterns. the dnt90mc/mp also has two selectable rf output power levels: +16 dbm (40 mw) and +22 dbm (158 mw). the dnt90mc/mp receiver is protected by a low-loss saw filter, providing an excellent blend of receiver sensi - tivity and out-of-band interference rejection that is espe - cially important in outdoor applications. the dnt90mc/mp provides a variety of hardware inter - faces. there are two serial ports plus one spi port. either the primary serial port or the spi port can be selected for data communications. the second serial port is dedicated to diagnostics. the primary and diagnostic serial ports sup - port most standard baud rates up to 250 kbps. the spi port supports data rates up to 500 kbps. the dnt90- mc/mp also includes three adc inputs, two dac outputs, and six general-purpose digital i/o ports. four of the digital i/o ports support an optional interrupt-from-sleep mode when configured as inputs. the radio is available in two mounting configurations. the dnt90mc is designed for solder reflow mounting. the DNT90MP is designed for plug-in connector mounting. dnt90mc/mp firmware dnt90mc/mp firmware implements direct peer-to-peer data transmissions that provide very low transmission latency between all dnt90mc/mp radios in a network. in addition, efficient point-to-point and point-to-multipoint net - works are readily configured using direct peer-to-peer transmissions. dnt90mc/mp firmware provides the user with a rich set of configuration options including a choice of hopping pat - terns, serial and/or spi data port operation, serial and spi data rate selection, rf output power selection, plus config- urable analog and digital i/o lines. data integrity is pro - tected by 24-bit error detection, with optional ack and automatic transmission retries or redundant transmissions. 128-bit aes encryption provides a high level of data secu - rity for sensitive applications. sensor networks can take advantage of timer or event-based data reporting and re - mote node sleep cycling for extended battery life. www.rfm.com e-mail: info@rfm.com page3of7 ? 2012 by rf monolithics, inc. dnt90mc/mp - 09/26/12

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pin name i/o description 1 gnd - power supply and signal ground. connect to the host circuit board ground. 2 act (diag_tx) o (o) this pin?s default configuration is transmitter activity (act) output. the act signal is asserted whenever any data packet other than just an ack is transmitted. the alternate function for this pin is the diagnostic serial port output. 3 /dcd (diag_rx) o (i) the /dcd signal is asserted when a dnt90mc/mp receives a valid packet. if a radio is transmitting data and receiving acks, both the act and /dcd signals will be asserted. if a radio is receiving packets only, the /dcd signal will be asserted. the alternate function for this pin is the diagnostic serial port input. 4 gpio0 i/o configurable digital i/o port 0. when configured as an input, an internal pull-up resistor can be selected and direct interrupt from sleep can be invoked. when configured as an output, the power-on state is configurable. in sleep mode the pin direction, input pull-up selection or output state are also separately configurable. 5 radio_txd o serial data output from the radio. 6 radio_rxd i serial data input to the radio. 7 gpoi4 (/host_cts) i/o (o) default pin function is gpio4 with the same configuration options as gpio2. alternate pin function is uart/spi flow control output. the module sets this line low when it is ready to accept data from the host on the radio_rxd or mosi input. when the line goes high, the host must stop sending data. 8 gpoi5 ( /host_rts) i/o (i) default pin function is gpio5 with the same configuration options as gpio2. alternate pin function is uart/spi flow control input. the host sets this line low to allow data to flow from the module on the radio_txd pin. when the host sets this line high, the module will stop sending data to the host. 9 dac0 o 12-bit dac 0 output. full scale output can be referenced to the voltage at pin 25 or the 3.3 v regulated module bus voltage. 10 gpio2 i/o configurable digital i/o port 2. same configuration options as gpio0. 11 gpio1 i/o configurable digital i/o port 1. same configuration options as gpio0. 12 gpio3 (dav) i/o (o) default pin function is gpio3 with the same configur ation options as gpio0. when spi slave mode oper- ation is enabled, a logic high on this pin indicates when data is available to be clocked out by the spi master. 13 dac1 o 12-bit dac 1 output. same specifications and configuration options as dac0. 14 vcc i power supply input, +3.3 to +5.5 vdc. 15 gnd - power supply and signal ground. connect to the host circuit board ground. 16 gnd - power supply and signal ground. connect to the host circuit board ground. 17 /reset i active low module hardware reset. 18 adc0 i adc input 0. this pin is a direct adc input when the adc is operating in single-ended mode, or the differ - ential negative input for positive inputs applied to adc1 or adc2 when the adc is operating in differential mode. full-scale reading can be referenced to pin 25 for ratiometric measurements. for absolute mea - surements, the adc can use the regulated supply voltage divided by 1.6 (about 2.06 v), or an external voltage applied to pin 25. in single-ended mode, adc measurements are 11-bit unsigned values with full scale nominally 2.7 v when referenced to a 2.7 v input on pin 27. in differential mode, adc measure - ments are 12-bit signed values. 19 adc1 i adc input 1. direct input when the adc is operating in single-ended mode, positive differential input rela - tive to adc0 when the adc is operating in differential mode. 20 miso i/o this pin is the spi master mode input or slave mode output. 21 mosi i/o this pin is the spi master mode output or slave mode input. 22 /ss i/o spi active low slave select. this pin is an output when the module is operating as a master, and an input when it is operating as a slave. 23 sclk i/o spi clock signal. this pin is an output when operating as a master, and an input when operating as a slave. www.rfm.com e-mail: info@rfm.com page4of7 ? 2012 by rf monolithics, inc. dnt90mc/mp - 09/26/12 dnt90mc/mp i/o descriptions
pin name i/o description 24 adc2 i adc input 2. direct input when the adc is operating in single-ended mode, positive differential input rela - tive to adc0 when the adc is operating in differential mode. 25 adc_ext_ ref i/o adc external reference voltage pin. the voltage at this pin can be used by the adcs as a reference for ratiometric measurements. with no external voltage or load applied, this pin presents a nominal 2.7 v out - put through a 2.126 k source resistance. a low impedance external reference voltage in the range of 1 to 2.7 v may be applied to this pin as an option. 26 rsvd - reserved pin. leave unconnected. 27 rsvd - reserved pin. leave unconnected. 28 gnd - connect to the host circuit board ground plane. 29 rsvd - reserved pin. leave unconnected. 30 gnd - connect to the host circuit board ground plane. dnt90mc/mp antenna connector a u.fl miniature coaxial connector is provided on both dnt90m configurations for connection to the rfio port. a short u.fl coaxial cable can be used to connect the rfio port directly to an antenna. in this case the antenna should be mounted firmly to avoid stressing the u.fl coaxial cable due to antenna mounting flexure. alternately, a u.fl coaxial jumper cable can be used to connect the dnt90mc/mp module to a u.fl connector on the host circuit board. the connection between the host circuit board u.fl connector and the antenna or antenna connec - tor on the host circuit board should be implemented as a 50 ohm stripline. referring to figure 2, the width of this stripline depends on the thickness of the circuit board between the stripline and the groundplane. for fr-4 type circuit board materials (dielectric constant of 4.7), the width of the stripline is equal to 1.75 times the thickness of the circuit board. note that other circuit board traces should be spaced away from the stripline to prevent signal coupling, as shown in figure 3. the stripline trace should be kept short to minimize its insertion loss. www.rfm.com e-mail: info@rfm.com page5of7 ? 2012 by rf monolithics, inc. dnt90mc/mp - 09/26/12 8 8 " 9 6 8 8 + 8 2 ! :
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www.rfm.com e-mail: info@rfm.com page6of7 ? 2012 by rf monolithics, inc. dnt90mc/mp - 09/26/12 0
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