T5750 Datasheet, PDF (1/12 Pages) ATMEL Corporation – UHF ASK/FSK TRANSMITTER

Features
• Integrated PLL Loop Filter
• ESD Protection also at ANT1/ANT2
(4 kV HBM/200 V MM; Except Pin 2: 4 kV HBM/100 V MM)
• High Output Power (5.5 dBm) with Low Supply Current (8.5 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
T5750
Description
The T5750 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 868 MHz to 928 MHz. It can be used in both FSK and ASK
systems.
Preliminary
Figure 1. System Block Diagram
1 Li cell
Encoder
Keys ^M44Cx9x
UHF ASK/FSK
Remote control transmitter
T5750
T5760/
T5761
UHF ASK/FSK
Remote control receiver
Demod.
Control
XTO
PLL
VCO
Antenna Antenna
IF Amp
PLL
XTO
1...3
µC
Power
amp.
LNA
VCO
Rev. 4546B–RKE–07/04