Automotive ICs TH7122 27 to 930MHz Transceiver IR Temperature 315 MHz, 433 MHz, 868 MHz or 915 MHz fixed settings in stand-alone mode Extended frequency range with external VCO varactor diode: 27 MHz to 930 MHz Frequency range: 300 MHz to 930 MHz in programmable user mode Power supply range: 2.2 V to 5.5 V Temperature range: -40 °C to +85 °C Standby current: 50 nA Operating current in receive: 6.5 mA (low gain) Operating current in transmit: 12 mA (at –2 dBm) Adjustable RF power range: –20 dBm to +10 dBm Sensitivity: -105 dBm at FSK with 180 kHz IF filter BW Sensitivity: -107 dBm at ASK with 180 kHz IF filter BW Max. input level: –10 dBm at FSK and -20 dBm at ASK FM/FSK deviation range: ±2.5 to ±80 kHz Max. data rate with crystal pulling: 20 kbps NRZ Max. data rate with direct VCO modulation: 115 kbps NRZ Input frequency acceptance: ± 10 to ± 150 kHz (depending on FSK deviation) Bus ICs • • • • • • • • • • • • • • • • CMOS Imaging Technical Data Overview Silicon MEMS • FSK for digital data or FM for analog signal reception • RSSI output for signal strength indication and ASK reception • Peak detector for ASK detection • Switchable LNA gain for improved dynamic range • Automatic PA turn-on after PLL lock • ASK modulation achieved by PA on/off keying • 32 pin Low profile Quad Package (LQFP32) RF&RFID • Single chip solution with only a few external components • Stand-alone fixed-frequency user mode • Programmable multi-channel user mode • PLL-stabilized RF VCO (LO) with internal varactor diode • Lock detect output in programmable user mode • On-chip AFC for extended input frequency acceptance range • 3 wire bus serial control interface Intelligent Drivers and Actuators Features Hall ICs The TH7122 is a single chip FSK/FM/ASK transceiver IC. It is designed to operate in low-power multi-channel programmable or single-channel stand-alone, half-duplex data transmission systems. It can be used for applications in automotive, industrial-scientific-medical (ISM), short range devices (SRD) or similar applications operating in the frequency range of 300 MHz to 930 MHz. In programmable user mode, the transceiver can operate down to 27 MHz by employing an external VCO varactor diode. 7 3 IN_DEM RSSI 2 VCC_IF 1 IN_IFA 31 VEE_IF 32 OUT_MIX 6 OUT_DEM PKDET SW1 1.5pF 26 MIX LNA INT2/PDO 5 INT1 MIX IFA IF SW2 OA1 Hall ICs Control Logic RO FSK 19 9 12 13 15 16 TE/SDTA 11 RE/SCLK 22 VEE_PLL 10 RO ASK/FSK 23 LF IN_DTA 21 TNK_LO 20 VCC_PLL VEE_RO 24 PS_PA FS1/LD PA 17 FS0/SDEN RO FSK_SW 18 14 Applications Low-power telemetry systems Home and building automation Alarm and security systems Garage door openers Active RFID tags L0 VCC_DIG 14 CERFIL 1 2 3 OUT_DTA RO 10 OUT_MIX RSSI FSK_SW 11 31 VEE_IF OUT_DEM 30 IN_MIX 32 4 5 6 7 8 C3 FSK Application Circuit CB5 (internal AFC Option) CB4 3wire bus CB7 VCC FSK input IN_DTA 12 INT1 CB1 SDTA SCLK ASK/FSK 13 TH7122 29 GAIN_LNA C1 FS1/LD 19 27 VEE_LNA IN_DEM L1 SDEN 16 26 IN_LNA 28 OUT_LNA C2 Lock detect RE/SCLK 15 VCC_IF CMOS Imaging CRX0 OUT_PA TNK_LO 21 25 Combining network VEE_PLL 22 CTX0 LF 23 CTX4 VEE_DIG 18 FS0/SDEN 17 RPS LTX0 VCC CB6 RF 24 RX_IN TX_OUT Bus ICs CF1 CF2 CB2 INT2/PDO Evaluation Board • • • • • VCC_PLL 20 • General bi-directional half duplex digital data RF signaling or analog signal communication • Tire Pressure Monitoring Systems (TPMS) • Remote Keyless Entry (RKE) • Networking solutions IN_IFA Intelligent Drivers and Actuators RF&RFID Silicon MEMS VCO SDTA 25 SCI R counter SCLK N counter SDEN OUT_PA 8 OUT_DTA 200k LO ASK 4 OA2 VCC_DIG IN_LNA bias FSK Demodulator VEE_DIG 30 IN_MIX 28 OUT_LNA 29 GAIN_LNA 27 VEE_LNA Automotive ICs Block Diagram C4 C5 RP CERDIS CB0 9 CX2 XTAL CX1 VEE_RO FSK output VCC Email Europe and rest of the world: [email protected] Email USA : [email protected] For additional information go to our website at: Email Asia: [email protected] Feb 2007 IR Temperature Disclaimer: Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical lifesupport or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering of technical or other services. © 2006 Melexis NV. All rights reserved.