UHF ASK/FSK TRANSMITTER
Features
• Integrated PLL Loop Filter • ESD Protection (4 kV HBM/ 200 V MM; Except Pin 2: 4 kV HBM/ 100 V MM)
also at AN...
Description
Features
Integrated PLL Loop Filter ESD Protection (4 kV HBM/ 200 V MM; Except Pin 2: 4 kV HBM/ 100 V MM)
also at ANT1/ANT2
High Output Power (8.0 dBm) with Low Supply Current (9.0 mA) 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 2.0 V to 4.0 V in the Temperature Range of -40° C to 85° C/125° C Package TSSOP8L Single-ended Antenna Output with High Efficient Power Amplifier CLK Output for Clocking the Microcontroller One-chip Solution with Minimum External Circuitry 125° C Operation for Tire Pressure Systems
UHF ASK/FSK Transmitter T5753
Description
The T5753 is a PLL transmitter IC which has been developed for the demands of RF low-cost transmission systems at data rates up to 32 kBaud. The transmitting frequency range is 310 MHz to 330 MHz. It can be used in both FSK and ASK systems.
Figure 1. System Block Diagram
UHF ASK/FSK Remote control transmitter
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UHF ASK/FSK Remote control receiver
1 Li cell T5753 Encoder ATARx9x
XTO
PLL Antenna Antenna VCO
U3741B/ U3745B/ T5743/ T5744
Demod.
1...3 Control
Keys
IF Amp
PLL
XTO
Power amp.
LNA
VCO
Microcontroller
Rev. 4510F–RKE–07/04
Pin Configuration
Figure 2. Pinning TSSOP8L
CLK 1 8 ENABLE GND
PA_ENABLE
...
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