ATA8402 UHF ASK/FSK Industrial Transmitter DATASHEET Features Integrated PLL loop filter ESD protection (3kV HBM/150V MM) High output power (7.5dBm) with low supply current (9.0mA) Modulation scheme ASK/FSK FSK modulation is achieved by connecting an additional capacitor between the XTAL load capacitor and the open drain output of the modulating microcontroller Easy to design-in due to excellent isolation of the PLL from the PA and power supply Single Li-cell for power supply Supply voltage 2.0V to 4.0V in the temperature range of 40C to +85C Package TSSOP8L Single-ended antenna output with high efficient power amplifier CLK output for clocking the microcontroller One-chip solution with minimum external circuitry Applications Industrial/aftermarket remote keyless entry systems Alarm, telemetering, and energy metering systems Remote control systems for consumer and industrial markets Access control systems Home automation Home entertainment Toys 4982E-INDCO-08/151. Description The ATA8402 is a PLL transmitter IC, which has been developed for the demands of RF low-cost transmission systems for industrial applications at data rates up to 50kBaud ASK and 32kBaud FSK modulation scheme. The transmitting frequency range is 429MHz to 439MHz. It can be used in both FSK and ASK systems. Figure 1-1. System Block Diagram UHF ASK/FSK UHF ASK/FSK Remote control transmitter Remote control receiver 1 Li cell Atmel ATA3741/ 1 to 3 Micro- ATA8402 ATA3745/ Demod Control controller ATA5743/ ATA5744/ Encoder PLL ATA8202 ATARx9x Keys IF Amp Antenna Antenna XTO VCO PLL XTO Power LNA VCO amp. 2 ATA8402 DATASHEET 4982EINDCO08/15