T5753 Datasheet, PDF (1/13 Pages) ATMEL Corporation – 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 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
1 Li cell
Encoder
Keys ^ATARx9x
UHF ASK/FSK
Remote control transmitter
UHF ASK/FSK
Remote control receiver
T5753
XTO
PLL
VCO
U3741B/
U3745B/
T5743/
T5744
Demod.
Antenna Antenna
IF Amp
PLL
1...3
Control
XTO
Power
amp.
LNA
VCO
Rev. 4510F–RKE–07/04