Rainbow Electronics ATA8402 - Manual

Features
• Integrated PLL Loop Filter
• ESD Protection (4 kV HBM/200V MM; Except Pin 2: 4 kV HBM/100V MM) also at
ANT1/ANT2
• High Output Power (7.5 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 2.0V to 4.0V in the Temperature Range of –40°C to +85°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
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
1. 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
50 kBaud ASK and 32 kBaud FSK modulation scheme. The transmitting frequency
range is 429 MHz to 439 MHz. It can be used in both FSK and ASK systems.
Figure 1-1. System Block Diagram
Micro-
controller
PLL
UHF ASK/FSK
Remote control receiver
UHF ASK/FSK
Remote control transmitter
ATA8402 ATA3741/
ATA3745/
ATA5743/
ATA5744
ATA8202
LNA VCO
PLL XTO
Power
amp.
VCO
Antenna
Demod Control
1 to 3
Encoder
ATARx9x
XTO
1 Li cell
Keys
Antenna
UHF ASK/FSK
Industrial
Transmitter
ATA8402
4982A–IND–02/07