ASH Transceiver 10 mW Power Amplifier Circuit Board ETSI SRD regulations allow up to 10 mW of transmitter power at 433.92 MHz, and up to 25 mW of transmitter power at 868.35 MHz. For those applications where maximum range is of primary important and low operating current is not a priority, a 10 mW power amplifier circuit can be utilized in conjunction with the ASH transceiver. Referring to the schematic and PCB layout, note that the circuit board is general purpose and can be used with either a TR3000 for 433.92 MHz operation or with a TR1001 for 868.35 MHz operation. The circuit board can also be configured for OOK or ASK operation, along with many other options. Depending on the configuration chosen, some components will be left out or replaced with zero-ohm jumpers. Bills of material are provided for both 433.92 and 868.35 MHz, set-up for OOK operation at 1200 bps. This set-up emphasizes maximum sensitivity and range. Component values can be adjusted for other data rates and/or for ASK operation as explained in the ASH Transceiver Designer’s Guide. The power amplifier circuitry does not have to be changed for operation at different data rates or for ASK operation. The circuit board includes a voltage regulator to support operation from a 5 to 15 Vdc supply. The circuit with draw up to 50 mA peak in transmit. A Vcc ON/OFF pin is provided to allow the circuit board to be powered down. The Transmit Data Input line is buffered by Q4 to reduce modulation drive current requirements, and is set-up for a 0 to 3 V modulation input. Q3 buffers the data output line, and can be configured as either a non-inverting or inverting buffer (see the Designer’s Guide for information on buffer circuit component values.) The data output signal from Q3 is nominally 0 to 3 V. The Transmit/Receive Select pin controls the ASH mode control pins and the antenna switch. For OOK operation, R6 and R9 are left unpopulated, and for ASK operation R7 and R8 are left unpopulated. The Gerber files for this PCB is on RFM’s web site, www.rfm.com. The file name is 10mWpcb.zip, and can be found in the Application Notes section under PCB Gerber Files. N o te : T h is la y o u t. D e p s o m e c o m p w ith " z e r o o C 1 7 R 2 T r a n s m it/R e c e iv e S e le c t 6 4 1 L 1 C 1 C 2 C 5 C 4 C 3 R 4 L 2 Q 2 D 1 R 3 R e c e iv e D a ta O u tp u t n e r a l- p u r p o s e c ir c u it b o a r d o n th e o p e r a tin g c o n fig u r a tio n , m a y b e o m itte d o r r e p la c e d m p e rs . 2 S W 1 is a g e e n d in g o n e n ts h m " ju 3 5 R 1 Q 1 R 2 8 R 5 C 6 L 3 R 2 2 R 2 1 R 2 3 C 1 8 Q 3 R 2 4 C 7 1 2 0 R 7 C 9 4 P K D E T P W ID T H 1 5 R 1 5 5 C 1 0 R 1 1 B B O U T C 1 1 6 C M P IN T O P V IE W V C C 2 1 6 R 1 3 R 1 2 C 1 6 7 R X D A T A P R A T E 1 4 R 1 4 1 3 R 1 9 8 T X M O D T H L D 1 R 2 0 9 G N D 2 L P F A D J T H L D 2 R R E F 1 2 R 1 6 1 0 1 1 R 1 7 R 1 8 C 1 2 P o w e r A m p lifie r C ir c u it B o a r d 1 7 C N T R L 1 R 9 C 1 5 C 8 3 2 R 1 0 A G C C A P C N T R L 0 G N D 3 R F IO G N D 1 V C C 1 1 8 1 9 C 1 4 R 2 5 R 6 R 8 A S H T r a n s c e iv e r 1 0 m W Q 4 R 2 6 5 R 2 7 2 V R 1 4 3 1 V c c O N /O F F T r a n s m it D a ta In p u t C 1 3 + 5 to + 1 5 V d c ASH Transceiver 10 mW Power Amplifier Circuit Board 868.35 MHz, 1200 bps OOK, zero threshold, non-inverting RX data buffer Designator U1 SW1 VR1 Q1 Q2 Q3 Q4 D1 L1 L2 L3 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 Description ASH Transceiver RF Switch Voltage Regulator SOT-23 Transistor SOT-23 Transistor SOT-23 Transistor SOT-23 Transistor SMT PIN Diode Inductor, 3.3 nH, ±5%, 0603 Inductor, 10 nH, ±5%, 0603 Inductor, 10 nH, ±5%, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 6 pF, ±5%, NPO, 0603 Capacitor, 2.7 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 10 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 not used not used Capacitor, 0.015 uF, ±10%, 0603 Capacitor, 0.2 uF, ±10%, 0603 Capacitor, 4.7 uF, ±10%, tantalum, 0603 Capacitor, 0.1 uF, ±10%, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Resistor, 27 K, ±5%, 0.0625 W, 0603 Resistor, 10 K, ±5%, 0.0625 W, 0603 Resistor, 510, ±5%, 0.0625 W, 0603 Resistor, 10, ±5%, 0.0625 W, 0603 Resistor, 240, ±5%, 0.0625 W, 0603 not used Resistor, "zero ohm", 0603 Resistor, "zero ohm", 0603 not used Resistor, "zero ohm", 0603 Resistor, 12 K, ±5%, 0.0625 W, 0603 not used Resistor, 270 K, ±5%, 0.0625 W, 0603 Resistor, "zero ohm", 0603 Resistor, 330 K, ±5%, 0.0625 W, 0603 Resistor, "zero ohm", 0603 not used Resistor, 100 K, ±1%, 0.0625 W, 0603 Resistor, 3 K, ±5%, 0.0625 W, 0603 Resistor, 330 K, ±5%, 0.0625 W, 0603 not used Resistor, "zero ohm", 0603 Resistor, "zero ohm", 0603 Resistor, 47 K, ±5%, 0.0625 W, 0603 Resistor, 22 K, ±5%, 0.0625 W, 0603 Resistor, 2 K, ±5%, 0.0625 W, 0603 Resistor, 2 K, ±5%, 0.0625 W, 0603 Resistor, 20 K, ±5%, 0.0625 W, 0603 Vendor RFM Alpha National Motorola NEC Motorola Motorola Alpha Toko Toko Toko as required as required as required as required as required as required as required not used not used as required as required as required as required as required as required as required as required as required as required as required as required as required as required not used as required as required not used as required as required not used as required as required as required as required not used as required as required as required not used as required as required as required as required as required as required as required Vendor Part # TR1001 AS125-73 LP2980AIM5-3.0 MMBT2222L NE85633 MMBT2222L MMBT2222L SMP1302-079 LL2012-F3N3K LL2012-F10NK LL2012-F10NK as required as required as required as required as required as required as required not used not used as required as required as required as required as required as required as required as required as required as required as required as required as required as required not used as required as required not used as required as required not used as required as required as required as required not used as required as required as required not used as required as required as required as required as required as required as required ASH Transceiver 10 mW Power Amplifier Circuit Board 433.92 MHz, 1200 bps OOK, zero threshold, non-inverting RX data buffer Designator U1 SW1 VR1 Q1 Q2 Q3 Q4 D1 L1 L2 L3 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 Description ASH Transceiver RF Switch Voltage Regulator SOT-23 Transistor SOT-23 Transistor SOT-23 Transistor SOT-23 Transistor SMT PIN Diode Inductor, 6.8 nH, ±5%, 0603 Inductor, 33 nH, ±5%, 0603 Inductor, 47 nH, ±5%, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 22 pF, ±5%, NPO, 0603 Capacitor, 3 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 33 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 not used not used Capacitor, 0.015 uF, ±10%, 0603 Capacitor, 0.2 uF, ±10%, 0603 Capacitor, 4.7 uF, ±10%, tantalum, 0603 Capacitor, 0.1 uF, ±10%, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Capacitor, 100 pF, ±5%, NPO, 0603 Resistor, 27 K, ±5%, 0.0625 W, 0603 Resistor, 10 K, ±5%, 0.0625 W, 0603 Resistor, 510, ±5%, 0.0625 W, 0603 Resistor, 10, ±5%, 0.0625 W, 0603 Resistor, 240, ±5%, 0.0625 W, 0603 not used Resistor, "zero ohm", 0603 Resistor, "zero ohm", 0603 not used Resistor, "zero ohm", 0603 Resistor, 12 K, ±5%, 0.0625 W, 0603 not used Resistor, 270 K, ±5%, 0.0625 W, 0603 Resistor, "zero ohm", 0603 Resistor, 330 K, ±5%, 0.0625 W, 0603 Resistor, "zero ohm", 0603 not used Resistor, 100 K, ±1%, 0.0625 W, 0603 Resistor, 10 K, ±5%, 0.0625 W, 0603 Resistor, 330 K, ±5%, 0.0625 W, 0603 not used Resistor, "zero ohm", 0603 Resistor, "zero ohm", 0603 Resistor, 47 K, ±5%, 0.0625 W, 0603 Resistor, 22 K, ±5%, 0.0625 W, 0603 Resistor, 2 K, ±5%, 0.0625 W, 0603 Resistor, 2 K, ±5%, 0.0625 W, 0603 Resistor, 20 K, ±5%, 0.0625 W, 0603 Vendor RFM Alpha National Motorola NEC Motorola Motorola Alpha Toko Toko Toko as required as required as required as required as required as required as required not used not used as required as required as required as required as required as required as required as required as required as required as required as required as required as required not used as required as required not used as required as required not used as required as required as required as required not used as required as required as required not used as required as required as required as required as required as required as required Vendor Part # TR3000 AS125-73 LP2980AIM5-3.0 MMBT2222L NE85633 MMBT2222L MMBT2222L SMP1302-079 LL2012-F6N8K LL2012-F33NK LL2012-F47NK as required as required as required as required as required as required as required not used not used as required as required as required as required as required as required as required as required as required as required as required as required as required as required not used as required as required not used as required as required not used as required as required as required as required not used as required as required as required not used as required as required as required as required as required as required as required file: tr_10mw1.vp, 2001.01.09 rev