F115

SYN113/SYN115 Datasheet (300-450MHz ASK Transmitter) Version 1.0 Contents 1. General Description .................................................................................................................... 1 2. Features........................................................................................................................................ 1 3. Applications ................................................................................................................................. 1 4. Typical Application ..................................................................................................................... 2 5. Pin Configuration........................................................................................................................ 2 6. Pin Description ............................................................................................................................ 2 7. Absolute Maximum Ratings (1) ................................................................................................... 3 8. Operating Ratings (2) ................................................................................................................... 3 9. Electrical Characteristics (4) ....................................................................................................... 3 10. Test Circuit ................................................................................................................................ 5 11. SYN113/SYN115 PCB Layout Recommendations.................................................................. 5 12. Functional Diagram .................................................................................................................. 6 13. Functional Description ............................................................................................................. 7 13.1. Crystal Oscillator ............................................................................................................. 7 13.1.1. Crystal Oscillator Parameters for ASK Operation................................................. 7 13.2. PLL ×32 ........................................................................................................................... 8 13.3. Power Amplifier ............................................................................................................... 8 13.4. Enable Control ................................................................................................................. 8 13.5. Under Voltage Detect ....................................................................................................... 8 14. Application Information ........................................................................................................... 9 14.1. Power Amplitude Control Using External Resistor ......................................................... 9 14.2. Output Power ON-OFF Control ..................................................................................... 10 14.3. RF Output Response as a Function of VDD and ASK ................................................... 11 14.4. Output Matching Network ............................................................................................. 11 14.5. Layout Issues.................................................................................................................. 11 14.6. Antenna Layout .............................................................................................................. 11 15. PCB Board ............................................................................................................................... 12 15.1 Functional Description of SYN113/SYN115 Evaluation Board. .................................... 13 15.2. SYN113/SYN115-433.92 ASK Bill of Materials........................................................... 14 15.3. SYN113/SYN115-315MHz ASK Bill of Materials ....................................................... 14 16. Package Information .............................................................................................................. 15 SYN113/SYN115 1. General Description The SYN113/SYN115 is a high performance, easy to use, single chip ASK Transmitter IC for remote wireless applications in the 300 to 450MHz frequency band. This transmitter IC is a true “data-in, antenna-out” monolithic device. SYN113/SYN115 has three strong attributes: power delivery, operating voltage and operating temperature. In terms of power, the SYN113/SYN115 is capable of delivering +10 dBm into a 50Ω load. This power level enables a small form factor transmitter (lossy antenna) such as a key fob transmitter to operate near the maximum limit of transmission regulations. In terms of operating voltage, the SYN113/SYN115 operates from 1.8V to 3.6V. Many transmitter ICs in the same frequency band stop operating below 2.0V. The SYN113/SYN115 will work with most batteries to the end of their useful limits. In terms of operating temperature, the SYN113/SYN115 operates from -40°C to +85°C. The SYN113/SYN115 is easy to use. It requires a reference frequency (RF carrier frequency divided by 32 times) generated from a crystal with a few additional external parts to create a complete versatile transmitter. The SYN113/SYN115 operates with ASK/OOK (Amplitude Shift Keying/On-Off Keyed) UHF receiver types from wide-band super-regenerative radios to narrow-band, high performance super-heterodyne receivers. The SYN113/SYN115’s maximum ASK data rate is 10kbps (Manchester Encoding). The SYN113/SYN115 transmitter solution is ideal for industrial and consumer applications where simplicity and form factor are important. For enhanced power saving, SYN115 includes power managing function（SYN113 do not have this function）. The power managing function Enables transmitter activated as long as high transient data input trigger signals are received. The transmitter will also be automatically switched off if there are no data input transients for a time exceeding approximately 75ms. 2. Features         Complete UHF transmitter Frequency range 300MHz to 450MHz Data rates up to 10kbps ASK Output Power to 10dBm Low external part count Low voltage operation (down to 1.8V) Operate with crystals or ceramic resonators Power down modes and wake-up functions to reduce power consumption（SYN115 only） 3. Applications  Fan Controllers *This specification is subject to change without notification. 1 of 16 SYN113/SYN115     Remote Power Switches Multi-Media Remote Control Remote Sensor Data Links Infrared Transmitter Replacement 4. Typical Application Figure 1. SYN113/SYN115 ASK Key Fob Design for 315 MHz and 433.92 MHz (Note: Values indicated in parentheses are for 315MHz) 5. Pin Configuration 6. Pin Description Pin Number SOT23-6 Pin Name Pin Function 1 PA_OUT Bandwidth Selection Bit 0 (Digital Input): Used in conjunction with SEL1 to set the desired demodulator filter bandwidth. See Table 1. Internally pulled-up to VDDRF 2 VSS Ground 3 VDD Voltage Drain Drain (Input): Positive Power Supply 4 XTLOUT 5 XTLIN 6 ASK Crystal Out (Output): Reference oscillator output connection. Crystal In (Input): Reference oscillator input connection. ASK DATA Input *This specification is subject to change without notification. 2 of 16 SYN113/SYN115 7. Absolute Maximum Ratings (1) +5V Supply Voltage (VDD) VSS–0.3 to VDD+0.3 Input/Output Voltage (VI/O) +7.2V Voltage on PA_OUT(VPA_OUT) Storage Temperature Range (TS) –65°C to +150°C Lead Temperature (soldering, 10 sec.) +300°C ESD Rating 2KV (3) 8. Operating Ratings (2) RF Frequency Range 300MHz to 450MHz Supply Voltage (VDD) +1.8V to +3.6V Ambient Temperature (TA) –40°C to +85°C 9. Electrical Characteristics (4) Specifications apply for VDD = 3.0V, TA = 25°C, FreqREFOSC = 13.560MHz, EN = VDD. Bold values indicate –40°C to 85°C unless otherwise noted. 1kbps data rate 50% duty cycle. RL 50ohm load (matched) Parameter Condition Min Typ Max Units Power Supply @ 315MHz, POUT = +10dBm 12.3 mA @ 433.92MHz, POUT = +10dBm 12.5 mA @ 315MHz 3 mA @ 433.92 MHz 3 mA Mark Supply Current ION SPACE supply current, IOFF Standby Mode @ 315MHz 1 uA @ 433.92 MHz 1 uA Standby supply current, ISTB ASK transition from HIGH to LOW 30 75 120 ms ASK transition from HIGH to LOW 30 75 120 ms Standby delay time RF Output Section and Modulation Limits: Output power level, POUT @315MHz (4) ASK "mark" @433.92MHz (4) *This specification is subject to change without notification. 10 dBm 10 dBm 3 of 16 SYN113/SYN115 Harmonics output for 315 MHz @ 630MHz @945MHz Harmonics output (4) (4) 2nd harm. 3rd harm. for 433.92 @ 867.84MHz MHz @1301.76MHz (4) (4) 2nd harm. 3rd harm. Extinction ratio for ASK -39 dBc -53 dBc -55 dBc -55 dBc 70 dBc ASK Modulation Data Rate 10 @315MHz (6) Occupied Bandwidth @433.92MHz (6) kbps