0.6mA low current high rate superheterodyne CHJ-801
Publish time 2017-06-02 10:49
Superheterodyne 801 is VHF / UHF UHF wireless data transmission high quality superheterodyne receiver module. The module is based on market feedback and the recommendations of the majority of users, and the introduction of highly shocking products. The module uses the European plant ultra-high frequency, low noise large scale integrated circuit, with a high cost, a comprehensive anti- , High reliability, can be FCC, CE indicators. Rolling code remote control / electric gating system and long-distance transmission of the preferred products. Large number of remote control garage doors, retractable doors, barrier, etc .; for GSM / GPS car System support; industrial control, communications and security and other fields; the receiving system is used in complex environments require a higher system ideal. Features are as follows: (1) the sensitivity of up to -110dbm, the receiving distance of more than twice the ordinary receiver board. (2) a reasonable reception bandwidth, with a strong ability to suppress the same frequency, anti-interference ability to adapt to a variety of environments. (3) good dispersion of radiation suppression, easy to pass FCC, CE testing standards. (4) good shielding, a variety of installation environment on the module performance is small, good consistency. (5) good local oscillator radiation suppression capability, multiple modules can work together (single and more) and will not interfere with each other, does not affect the receiving distance. (6) using SAW local oscillator, stable performance, suitable for a wide temperature range. (7) for 250-450MHz frequency adjustment is easy, short supply cycle. (8) single-chip direct interface, easy to achieve (transmission rate up to 20kbps). (9) to enhance the anti-interference ability of the phone / to improve the decoding waveform. Electrical parameters: VOD-VSS-5V, TA = 25 degrees
Parameters symbol State Reference Unit Minimal standard maximum working frequency Fc 433.92 MHz Modulation mode ASK Receiving sensitivity 50 ohm antenna directly input BER3 / 1000,1.2kbps -105 -110 -115 Dbm Maximum input unsaturated power -10 0 Dbm Receive bandwidth ± 120 ± 1000 KHz Receive on time Ton 10 Ms Power consumption IRC RX-EN = LOW 6 MA Decode output high voltage 4.5 V Decode output low voltage 0.5 V Operating temperature TC -40 85 ℃ 801 is the wireless receiver module using ASK transmission mode, ASK way in the transmission will produce data signal pulse width of the change, therefore, in the preparation of wireless data corresponding to this action: for example, the following agreement. "1" to receive decoding when the high level is less than 500 us can be judged as "1" 750us 250us "0" high level greater than 500us can be judged as "0" 250us 750us The boot code can be "1" or "0" code, the starting code with 2ms low. Limit rating table:
parameter symbol Value unit DC supply voltage Vcc-Vss 6.5 V Workpiece temperature range TOPR -40to85 degree Storage temperature range TSTG -60to125 degree Pin Description:
Feet name Function Description 1 ANT Antenna access point 2,3 GND Grounded 4 RX-DATA Decode square wave output 5 VCC Module power supply Application Note: (1) VCC supply voltage and module operating voltage, error ± 5%. (2) (3) (5) between the feet near the next one porcelain 0.01uF capacitor. (L1 = L2 = 100Uh), (C1, C2 = 0.1uF), reduce the interference of the system to the module, if the module access to the system has a large interference or too high requirements, If the system interference is not large or not too high requirements, L1, L2, C2 may not. (4) antenna on the module to receive a great impact, it is best to connect a quarter-wavelength single-oscillator antenna. (5) Antenna position on the module to receive the effect is also affected, you can put the antenna directly ANT interface, can also be connected through the ANT pin system and then receive the antenna, The antenna is as straight as possible, away from the shield, the high pressure, and the source of the interference.
