TH72035 Datasheet | Melexis

Features ! Fully integrated PLL-stabilized VCO ! Frequency range from 850 MHz to 930 MHz ! Single-ended RF output ! FSK through crystal pulling allows modulation from DC to 40 kbit/s ! High FSK deviation possible for wideband data transmission ! ASK achieved by on/off keying of internal power amplifier up to 40 kbit/s ! Wide power supply range from 1.95 V to 5.5 V ! Very low standby current ! On-chip low voltage detector ! High over-all frequency accuracy ! FSK deviation and center frequency independently adjustable ! Adjustable output power range from -11 d Bm to +9.5 d Bm ! Adjustable current consumption from 5.1 m A to 13.4 m A ! Conforms to EN 300 220 and similar standards ! 10-pin Quad Flat No-Lead Package (QFN) Ordering Information Part Number Temperature Code K (-40 °C to 125 °C) Package Code LD (10L QFN 3x3 Dual) Delivery Form 120 pc/tray 5000 pc/T&R Application Examples ! General digital data transmission ! Tire Pressure Monitoring Systems (TPMS) ! Remote Keyless Entry (RKE) ! Wireless access control ! Alarm and security systems ! Garage door openers ! Remote Controls ! Home and building automation ! Low-power telemetry systems Pin Description ASKDTA FSKDTA FSKSW ROI ENTX top VCC VEE OUT VEE PSEL bottom 10 1 92 83 74 65 General Description The TH72035 FSK/ASK transmitter IC is designed for applications in the European 868 MHz industrialscientific-medical (ISM) band, according to the EN 300 220 telemunications standard. It can also be used for any other system with carrier frequencies ranging from 850 MHz to 930 MHz (e.g. for applications in the US 902 to 928 MHz ISM band). The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref. The integrated PLL synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved. This is done by using a crystal with a reference frequency according to: fref = fc/N, where N = 32 is the PLL feedback divider ratio. 39010 72035 Rev....