SYN531R Datasheet Version 2.0.pdf

- 1 - *This preliminary datasheet is subject to change without notification. FEARURES ? 300MHz to 450MHz Frequency Range ? -109dBm High Sensitivity, 1Kbps and BER 10E-2 @ 315MHz and 433.92MHz ? Image Rejection Function ? Low Power Consumption ? Excellent Selectivity and Noise Rejection ? No External IF Filter Required ? Low External part count ? SOP-8 Package Type DESCRIPTION The SYN531R is an UHF ASK receiver IC in a small SOP-8 package which operates at 300MHz to 450MHz with typical receiving sensitivity of -109dBm. The SYN531R is a Weaver architecture receiver for ASK and OOK modulation such as pulse width modulation, variable pulse modulation, Manchester modulation and so on. The Weaver receiver also provides image rejection function to remove the image band and selects the desired signal. The high integrated SYN531R uses the low cost 8-Lead Small Outline Package (SOP-8), no extra external component is required except two capacitors (CTH and CAGC), reference crystal and antenna matching network. The SYN531R provides the Shut Down function pin (SHDN). Applications ? Automotive Remote Keyless Entry (RKE) ? Remote Control System ? Access Control System ? Home Automation ? Toys - 2 - *This preliminary datasheet is subject to change without notification. TYPICAL APPLICATION 433.92MHz, 1KHz Baud Rate Application Circuit SYN531R requires only three components to operate: two capacitors (CTH and CAGC) and the reference frequency device, usually a quartz crystal. Additional five components may be used to improve performance. These are: power supply decoupling capacitor, two components for the matching network, and two components for the pre-selector band pass filter. PIN CONFIGURATION ROANT GND VDD 1 SHDN 2 3 4 8 CAGC7 CTH6 DO5 SYN531R SOP-8 PIN DESCRIPTION Pin Name I/O Function 1 ANT I RF Input 2 GND GND Ground 3 VDD POWER Power Supply 4 SHDN I Shut Down 5 DO O Data Output 6 CTH I Sl