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general description the max9947 is an aisg-compliant, fully integrated transceiver. the max9947 receiver offers a typical dynamic range of 20db and integrates a bandpass filter that operates in the 2.176mhz frequency with a narrow 200khz bandwidth. the max9947 transmitter integrates a bandpass filter that is compliant with the aisg spectrum emission profile. it can modulate ook signals up to 115.2kbps. the output power can be varied with external resistors from +7dbm to +12dbm to compensate for loss in the external circuitry and cabling. the max9947 also features a direction output to facilitate the rs-485 bus arbitration in tower-mounted equipment. the max9947 is available in a small, 3mm x 3mm 16-pin tqfn and is rated for operation in the -40c to +105c temperature range. applications base stations tower equipment beneits and features receiver wide input dynamic range ? -15dbm to +5dbm in 50 variable transmitter output level from +7dbm to +12dbm aisg-compliant output emission profile autodirection output no need of microcontrollers to handle bus arbitration in tower-mounted equipment supports all aisg data rates ? 9.6kbps ? 38.4kbps ? 115.2kbps bandpass filter compliant with aisg protocol centered around 2.176mhz 3.0v to 5.5v voltage supply independent logic supply small, 3mm x 3mm 16-pin tqfn package 19-5029; rev 4; 4/16 + denotes a lead(pb)-free/rohs-compliant package. * ep = exposed pad. connect ep to gnd to enhance thermal dissipation. part temp range pin-package top mark max9947ete+ -40c to +105c 16 tqfn-ep* ahf max9947 bandpass filter rxin syncout txout 1.5v ref -15dbm bandpass filter +7dbm to +12dbm res bias ook demodulator direction detection state machine analog switch gnd rxout dir dirmd2 dirmd1 txin xtal2 xtal1 v cc v l max9947 aisg integrated transceiver functional diagram ordering information evaluation kit available downloaded from: http:///
v cc to gnd ............................................................ -0.3v to +6v v l to gnd ............................................................... -0.3v to +6v txout, bias to gnd .............................. -0.3v to (v cc + 0.3v) rxin, xtal1, xtal2, syncout, res to gnd .... -0.3v to +6v txin, rxout, dir, dirmd1, dirmd2 to gnd ...................................... -0.3v to (v l + 0.3v) output short-circuit current txout, syncout to v cc or gnd .................................... continuous all other pins max in/out current.................................... 20ma continuous power dissipation (t a = +70c) 16-pin tqfn (derate 17.5mw/c) ............................ 1399mw operating temperature range ......................... -40c to +105c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c lead temperature (soldering, 10s) ................................. +300c soldering temperature (reflow) ....................................... +260c (v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, 4.1k resistor between bias and res, 10k resistor between res and gnd, 1k resistor between syncout and v cc , t a = t min to t max , unless otherwise specified. xtal frequency 8.704mhz 30ppm. typical values are at t a = +25c.) (note 2) parameter symbol condition min typ max units dc characteristics supply voltage v cc guaranteed by psrr 3.0 5.5 v supply current i cc t a 85c 23 35 ma t a > 85c 27 40 logic supply voltage v l guaranteed by logic supply current 1.6 5.5 v logic supply current i l v txin = 3.3v 138 380 a receiver power-supplyrejection ratio psrr 3.0v v cc 5.5v, v txin = 3.3v (note 3) 49 60 db output power-supplyrejection ratio 3.0v v cc 5.5v, v txin = 0v (note 4) 49 60 db logic inputs and outputs logic-input high threshold voltage v ih dirmd1, dirmd2, txin 0.7 x v l v logic-input low threshold voltage v il dirmd1, dirmd2, txin 0.3 x v l v logic-output high threshold voltage v oh rxout, dir source 3.3ma 0.9 x v l v logic-output low threshold voltage v ol rxout, dir sink 3.3ma 0.1 x v l v input leakage current i ih , i il txin shorted to gnd or v l 1 a dirmd1, dirmd2 shorted to gnd -1 shorted to v l +60 sync input (xtal1) and output (syncout) input high threshold voltage v xtal1_ih 0.7 x v cc v max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 2 absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. electrical characteristics tqfn junction-to-ambient thermal resistance ( ja )........57.2c/w junction-to-case thermal resistance ( jc )................40c/w (note 1) note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . package thermal characteristics downloaded from: http:///
(v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, 4.1k resistor between bias and res, 10k resistor between res and gnd, 1k resistor between syncout and v cc , t a = t min to t max , unless otherwise specified. xtal frequency 8.704mhz 30ppm. typical values are at t a = +25c.) (note 2) parameter symbol condition min typ max units input low threshold voltage v xtal1_il 0.3 x v cc v input high leakage current i xtal1_ih 10 a input low leakage current i xtal1_il -10 a output low voltage v syncout_ol syncout source 3.3ma 0.4 v receiver filter passband f pb_l , f pb_h input amplitude 1.12v p-p (the input carrier is recognized) 1.1 4.17 mhz extra carrier receiver immunity f im1_l , f im1_h 2.176mhz carrier amplitude (112.4mv p-p 3db), extra carrier amplitude 0.8v p-p , v dirmd1 = v dirmd2 = 0v (9.6kbps) 1.1 4.17 mhz receiver input voltage range v in v cc = 3.0v to 5.5v, f rxin = 2.176mhz 1.12 v p-p equivalent input power range p in v cc = 3.0v to 5.5v, f rxin = 2.176mhz +5 dbm input impedance z in f = f o , t a 85c 11 18 k? f = f o , t a > 85c 9 18 threshold voltage range v th f rxin = 2.176mhz -18 -15 -12 dbm 79.72 112.4 158.48 mv p-p transmitter output frequency f o 2.176 mhz output frequency variation f o (note 5) 100 ppm output on level at txout (note 6) v out v res = 1.5v (maximum) 11.1 12 dbm 2.24 2.52 v p-p v res = 0.7v (minimum) 5.38 6.28 dbm 1.30 1.17 v p-p output off power level at txout (note 6) p out ook off level -40 dbm output emission proile (note 7) conforms to aisg spectrum emissions mask 3gpp ts 25.461, see figure 3 output impedance z out dc 0.03 ? f sw = 10mhz 2.5 ampliier gain bandwidth gbw 54 mhz txout short-circuit protection i sc short to gnd or v cc , guaranteed over v cc range 200 ma max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 3 electrical characteristics (continued) downloaded from: http:///
(v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, 4.1k resistor between bias and res, 10k resistor between res and gnd, 1k resistor between syncout and v cc , t a = t min to t max , unless otherwise specified. xtal frequency 8.704mhz 30ppm. typical values are at t a = +25c.) (note 2) note 2: all devices are 100% production tested at t a = +25c. specification over temperature limits are guaranteed by design. note 3: defined as ?v rxin /?v cc at dc. note 4. defined as ?v txout /?v cc at dc. note 5: output frequency variation determined by external crystal tolerance. note 6: see the transmission output power section for external resistor values. note 7: guaranteed by design with a recommended 470pf capacitor between rxin and ground. measurements above 150mhz are determined by setup. note 8: see figure 1. note 9: 2s envelope rise/fall. parameter symbol condition min typ max units switching characteristics receiver propagation delay t rx rxin to rxout, v dirmd1 = v dirmd2 = 0v 8.9 11 s rxin to rxout, v dirmd1 = 3.3v, v dirmd2 = 0v (38.4kbps), v dirmd1 = 0v, v dirmd2 = 3.3v (115.2kbps) 5.5 11 receiver output rise and fall time t r , t f 10% to 90%, r l = 1k?, c l = 10pf 20 ns transmitter propagation delay t tx txin to txout 5 s dir to rxout delay (note 8) t dir, skew 270 ns direction duration high t dir, high v dirmd1 = v dirmd2 = 0v (9.6kbps) 1667 s v dirmd1 = 3.3v, v dirmd2 = 0v (38.4kbps) 417 v dirmd1 = 0v, v dirmd2 = 3.3v (115.2kbps) 137 receiver output data duty-cycle variation dc rxin fed by an ook 2.176mhz sinusoidal signal with 50% duty cycle (note 9) rxin = 0dbm -7.5 10 % rxin = -10dbm +2 10 max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 4 electrical characteristics (continued) downloaded from: http:///
(v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, rxin connected to 50 in series with 220nf to gnd, r1 = 10k between bias and res, r2 = , pullup syncout with 1k to v l , t a = t min to t max , unless otherwise speciied.) quiescent current vs. temperature max9947 toc02 temperature (c) quiescent current (ma) 60 35 10 -15 18 21 24 27 3015 -40 85 txin = v l v cc = 5.0v v cc = 3.0v transmitter output vs. v res max9947 toc03 v res (v) transmitter output (dbm) 1.3 1.1 0.9 2 4 6 8 10 12 14 0 0.7 1.5 maximum transmitter output level vs. supply voltage max9947 toc04 supply voltage (v) transmitter output (dbm) 5.0 4.5 4.0 3.5 2 4 6 8 10 12 14 0 3.0 5.5 maximum transmitter output level vs. temperature max9947 toc05 temperature (c) transmitter output (dbm) 60 35 10 -15 11 12 13 1410 -40 85 v cc = 5.0v v cc = 3.0v transmitter ouput spectrum vs. frequency (9.6kbps) max9947 toc06 frequency (mhz) transmitter output (dbm) 100 10 1 -100 -80 -60 -40 -20 0 20 -120 0.1 1000 90% duty cyclec f = 470pf transmitter ouput spectrum vs. frequency (9.6kbps) max9947 toc07 frequency (mhz) transmitter output (dbm) 20 15 10 5 -100 -80 -60 -40 -20 0 20 -120 0 25 90% duty cyclec f = 470pf quiescent current vs. supply voltage max9947 toc01 supply voltage (v) quiescent current (ma) 5.0 4.5 4.0 3.5 17 19 21 23 2515 3.0 5.5 txin = v l transmitter ouput spectrum vs. frequency (38.4kbps) max9947 toc08 frequency (mhz) transmitter output (dbm) 100 10 1 -100 -80 -60 -40 -20 0 20 -120 0.1 1000 90% duty cyclec f = 470pf transmitter ouput spectrum vs. frequency (38.4kbps) max9947 toc09 frequency (mhz) transmitter output (dbm) 20 15 10 5 -100 -80 -60 -40 -20 0 20 -120 0 25 90% duty cyclec f = 470pf max9947 aisg integrated transceiver maxim integrated 5 www.maximintegrated.com typical operating characteristics downloaded from: http:///
(v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, rxin connected to 50 in series with 220nf to gnd, r1 = 10k between bias and res, r2 = , pullup syncout with 1k to v l , t a = t min to t max , unless otherwise speciied.) transmitter ouput spectrum vs. frequency (115.2kbps) max9947 toc10 frequency (mhz) transmitter output (dbm) 100 10 1 -100 -80 -60 -40 -20 0 20 -120 0.1 1000 90% duty cyclec f = 470pf transmitter ouput spectrum vs. frequency (115.2kbps) max9947 toc11 frequency (mhz) transmitter output (dbm) 20 15 10 5 -100 -80 -60 -40 -20 0 20 -120 0 25 90% duty cyclec f = 470pf transmitter ouput impedance vs. frequency max9947 toc12 frequency (mhz) transmitter output impedance ( ? ) 10 1 0.1 5 10 15 20 25 0 0.01 100 power-supply rejection ratio vs. frequency max9947 toc13 frequency (khz) psrr (db) 10,000 1000 0.1 1 10 100 -70 -60 -50 -40 -30 -20 -10 0 -80 0.01 100,000 txin = v l receiver input impedance vs. frequency max9947 toc14 frequency (khz) receiver intput impedance (k ? ) 1000 100 10 1 2 4 6 8 10 12 14 16 18 20 0 0.1 10,000 receiver input threshold vs. temperature max9947 toc15 temperature (c) receiver input threshold (dbm) 60 35 10 -15 -16 -12 -8 -4 0 -20 -40 85 rxout = stable low rxout = stable high dir to receiver output delay vs. temperature temperature (c) dir to receiver output delay (ns) 60 35 10 -15 320 340 360 380 400300 -40 85 max9947 toc16 max9947 aisg integrated transceiver maxim integrated 6 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
(v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, rxin connected to 50 in series with 220nf to gnd, r1 = 10k between bias and res, r2 = , pullup syncout with 1k to v l , t a = t min to t max , unless otherwise speciied.) transmitter propagation delay at 115.2kbps max9947 toc18 txin2v/div txout 1v/div 2s/div receiver propagation delay at 9.6kbps max9947 toc19 rxin500mv/div rxout 2v/div 20s/div receiver propagation delay at 115.2kbps max9947 toc20 rxin500mv/div rxout 2v/div 2s/div receiver output to dir at 9.6kbps max9947 toc21 rxout2v/div dir 2v/div 400s/div v dirmd1 = v dirmd2 = 0v transmitter propagation delay at 9.6kbps max9947 toc17 txin2v/div txout 1v/div 20s/div receiver output to dir at 38.4kbps max9947 toc22 rxout2v/div dir 2v/div 100s/div v dirmd1 = v l , v dirmd2 = 0v max9947 aisg integrated transceiver maxim integrated 7 www.maximintegrated.com typical operating characteristics downloaded from: http:///
(v cc = 5v, v l = 3.3v, txout connected with 50 to rxin, rxin connected to 50 in series with 220nf to gnd, r1 = 10k between bias and res, r2 = , pullup syncout with 1k to v l , t a = t min to t max , unless otherwise speciied.) receiver output to dir at 115.2kbps max9947 toc23 rxout2v/div dir 2v/div 40s/div v dirmd1 = 0v, v dirmd2 = v l dir to receiver output max9947 toc24 rxout2v/div dir 2v/div 100ns/div receiver output duty cycle vs. receiver input (9.6kbps) max9947 toc25 receiver input (dbm) receiver output duty cycle (%) 2 -1 -4 -7 44 48 52 56 6040 -10 5 receiver output duty cycle vs. receiver input (115.2kbps) max9947 toc26 receiver input (dbm) receiver output duty cycle (%) 2 0 -2 -4 -6 -8 10 20 30 40 50 60 0 -10 4 receiver output duty cycle (9.6kbps) max9947 toc27 rxout1v/div rxin500mv/div 100s/div rxin = 3dbm max9947 aisg integrated transceiver maxim integrated 8 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
pin name function 1 syncout sync output. open-drain output that outputs the 8.704mhz clock to synchronize other devices. 2 txin digital signal input 3 v l logic supply voltage 4 rxout digital signal output 5 dir direction output. dir is asserted high when the data stream is seen at the receiver (rxin). 6 dirmd2 duration mode select input 2 7 dirmd1 duration mode select input 1 8, 16 gnd ground 9 res external resistors connection to set the output power level 10 bias output bias reference. used with res to set the output power level. decouple bias with 1f to gnd. 11 rxin ook-modulated input signal 12 txout ook-modulated output signal 13 v cc analog supply voltage 14 xtal1 external crystal input terminal. feed with 8.704mhz (30ppm) input clock for external synchronization. 15 xtal2 external crystal input terminal. connect to gnd for external synchronization. ep exposed pad. connect ep to gnd to enhance thermal dissipation. 1516 14 13 65 7 txin rxout 8 syncout rxinres txout 1 2 xtal1 4 12 11 9 xtal2 gnd + ep* gnddirmd2 dirmd1 tqfn (3mm x 3mm) *ep = exposed pad. connect ep to gnd to enhance thermal dissipation. dir max9947 v l bias 3 10 v cc top view max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 9 pin description pin coniguration downloaded from: http:///
detailed description the max9947 is an aisg-compliant, fully integrated transceiver. the max9947 transmitter includes an ook modulator, a bandpass filter that is compliant with the aisg spectrum emission profile, and an output amplifier. the output power can be varied with external resistors from +7dbm to +12dbm (+1dbm to +6dbm at the feeder cable) to com - pensate for loss in the external circuitry and cabling. the ook carrier is generated by applying an external crystal at 8.704mhz to the ook internal modulator through the xtal1 and xtal2 pins. an external clock source at the same frequency can also be applied to xtal1 by con - necting xtal2 to ground. the max9947 receiver includes a narrow 200khz band - width bandpass filter that operates around the 2.176mhz center frequency. it also includes an ook demodulator and a comparator that reconstruct the digital signal. the minimum sensitivity of the receiver is -15dbm (typ) in compliance with the aisg standard specifications. the max9947 also features a direction output to facilitate the rs-485 bus arbitration in tower-mounted equipment. direction output the max9947 provides a direction output pin (dir) that indicates the direction of the data flow. this feature is very useful in the tower that acts as a slave in the aisg protocol. the base is the master and it controls the flow of the data by performing the bus arbitration. the output dir allows the equipment in the tower to avoid any involvement in the bus arbitration. see the typical application circuit (connectivity at the tower) that shows how the max9947 can be used in the tower in conjunction with the rs-485 transceiver such as the max13485e or max13486e. the output dir drives the de (driver output enable) and re_ (receiver output enable) of the rs-485 transceiver. whenever the data flows from rxin to rxout, the out - put dir is asserted high. when the max9947 is located in the tower, the data flow is being sent from the base (master) to the tower (slave). on the other side, when the data flows in the opposite direction, from txin to txout the output dir is asserted low. however, the max9947 internal state machine is sensing both the txin and rxin lines, and can recognize the correct flow of data and avoid asserting the dir high. figure 1 and figure 2 show the timing diagrams of the dir functionality. when the data flows from rxin to rxout, dir remains high for 16 bit-times after the last logic-level low bit within the 8-bit protocol data. this is compliant with the aisg specification saying that the rs-485 transmitter stops driving the bus within 20 bit-times after the last stop bit is sent. the input pins dirmd2 and dirmd1 define the duration of the bit time, as shown in table 1 . figure 1. the max9947 on the tower: communication flow is from the base to the tower idle (logic-level high) idle idle txin rxin rxout dir idle start bit bit0 = 1 bit1 = 1 bit2 = 0 bit3 = 0 bit4 = 1 dir = 1 bit5 = 1 bit6 = 0 bit7 = 0 stop bit dir = 1 for other 16 bit-times stop bit t dir, skew t rx max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 10 downloaded from: http:///
applications information emission output proile the aisg standard defines the maximum spectrum emis - sion that all the ook modulating devices must be compli - ant with. such a spectrum is represented in figure 3 . the max9947 is compliant with the aisg standard. an external 470pf capacitor connected between rxin and ground is recommended for compliance above 25mhz (see the typical application circuit (connectivity at the base) and typical application circuit (connectivity at the tower) ). * dirmd1 and dirmd2 are internally pulled down. figure 2. the max9947 on the tower: communication flow is from the tower to the base figure 3. aisg standard modem spectrum emission mask table 1. bit-time duration selector dirmd2* dirmd1* aisg data rate (kbps) unity bit time (s) 0 0 9.6 104.16 0 1 38.4 26.04 1 0 115.2 8.68 1 1 not used not used idle (logic-level high) idle idle start bit t tx 1 1 1 0 0 0 0 1 stop bit idle idle idle (logic-level low) dir rxout txout and rxin txin 9khz 1mhz 1mhz 400khz 200khz f o 10mhz 20mhz 30mhz 400mhz 12.75ghz -67dbm -125dbm -36dbm -36dbm -25dbm -25dbm -5dbm -5dbm +5dbm emissions spectrum with 50% duty-cycle ook, conforms to aisg ts 25.461 max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 11 downloaded from: http:///
external termination and ac-coupling to feeder cable the max9947 transceiver works in conjunction with an external 50i termination. the termination is connected serially between txout and the feeder cable. it acts as series termination for the transmitting path (data flowing from txin to txout) and acts as parallel termination when data is being received on rxin. the output of the transmitter is biased at 1.5v to maximize the power-supply rejection ratio and minimize the emis - sion. it is recommended that the device be ac-coupled to the feeder cable through either an external rf filter or a series 100nf capacitor. transmission output power the max9947 output level at txout can be set by using two external resistors that connect at the res and bias pins as shown in the typical application circuit (connectivity at the base) and typical application circuit (connectivity at the tower) . the maximum volt - age at txout is 2.52v p-p . assuming that the feeder cable is terminated into a 50 impedance, the external filter is lossless at 2.176mhz, and a series 50 termina - tion is being used as in the typical application circuit (connectivity at the base) and typical application circuit (connectivity at the tower) , the output level of 2.52v p-p corresponds to +6dbm at the feeder cable. the txout voltage level can be varied according to the following equations: v txout (v p-p ) = (2.52v p-p x v res (v))/1.5v v res (v) = 1.5v x r2/(r1 + r2) v txout (v p-p ) = 2.52v p-p x r2/(r1 + r2) use r1 = 0 for maximum voltage level of 2.52v p-p . the voltage at the res pin must be between 0.84v and 1.5v. it implies that the minimum voltage level at txout is approximately 1.41v that corresponds to +1dbm at the feeder cable. it is recommended that a 1f capacitor be connected between the bias pin and ground. to obtain the nominal power level of +3dbm at the feeder cable as the aisg standard requires, use r1 = 4.1k and r2 = 10k that provide 1.78v p-p at txout. the max9947 can provide up to 2.52v p-p to compensate for potential loss within the external filter, cable, connec - tions, and termination. receiver-input range and threshold the maximum ook input power at rxin into the 50 external termination is +5dbm. for a single-tone signal at 2.176mhz, 5dbm corresponds to 1.12v p-p . the max9947 internal threshold is -15dbm (112.4mv p-p ) with 3db accuracy in compliance with the aisg standard specifications. this threshold sets the minimum input sig - nal level that is recognized as ook carrier being present (level logic-low). consider a corner case where the ook signal at 2.176mhz present at the rxin pin is at the minimum level of -15dbm 3db. to avoid the saturation of the receiver input stage, any other adjacent carrier with power-up to +5dbm must be either below 1.1mhz or above 4.5mhz. external clock the max9947 integrated aisg transceiver operates with an external crystal at 4x the 2.176mhz frequency, or 8.704mhz. the crystal is required to achieve the 100ppm frequency stability specification of the aisg standard. a crystal with 30ppm is recommended along with two 40pf (10% tolerance) capacitors connect - ed to ground as shown in typical application circuit (connectivity at the base) and typical application circuit (connectivity at the tower) . the capacitors do not affect the oscillation frequency. multiple max9947 devices can share the same crystal by using the syncout pin. one device acts as a mas - ter and provides the 8.704mhz clock signal to the slave device(s) through such a pin. to configure a device as a slave, xtal2 should be connected to ground. the exter - nal clock coming from the master device feeds the xtal1 pin of the slave device through a series 10k resistor. connect a 1k pullup resistor to v cc from the syncout pin of the master device. max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 12 downloaded from: http:///
max9947 bandpass filter rxin syncout tx power: +1dbm to +6dbm txout 50 ? coax cable ac- coupling 1.5v ref -15dbm c f = 470pf bandpass filter +7dbm to +12dbm res bias ook demodulator direction detection state machine analog switch power supply gnd rxout fpga dir 12v 3.3v 0.1f 0.1f 1f r2 r1 5.0v 8.704mhz dirmd2 dirmd1 txin xtal2 xtal1 v cc v l max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 13 typical application circuit (connectivity at the base) downloaded from: http:///
max9947 max13486emax13485e bandpass filter rxin syncout tx power: +1dbm to +6dbm txout 50 ? coax cable ac- coupling 1.5v ref -15dbm bandpass filter +7dbm to +12dbm res bias ook demodulator direction detection state machine analog switch power supply gnd di de ro gnd b a rxout dir 5v 12v 3.3v 0.1f 0.1f 1f r2 r1 5.0v 8.704mhz dirmd2 rs-485 bus to tma/ret dirmd1 txin xtal2 xtal1 v cc v cc v l re c f = 470pf max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 14 typical application circuit (connectivity at the tower) chip information process: bicmos downloaded from: http:///
package type package code outline no. land pattern no. 16 tqfn-ep t1633f+3 21-0136 90-0033 max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 15 package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. downloaded from: http:///
max9947 aisg integrated transceiver www.maximintegrated.com maxim integrated 16 package information (continued) for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. downloaded from: http:///
revision number revision date description pages changed 0 12/09 initial release 1 9/10 corrected figures 1 and 3, added soldering temperature 2, 10, 11 2 6/11 changed top mark in ordering information 1 3 7/11 added q ja and q jc data 2 4 4/16 updated electrical characteristics and ordering information tables, figure 3 1C4, 11, 15, 16 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max9947 aisg integrated transceiver ? 2016 maxim integrated products, inc. 17 revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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