XE1209 FEATURES Single chip transceiver cost external compon

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Datasheet XE1209 Ultra Power CMOS Transceiver
XE1209
FEATURES
Single chip transceiver cost external component count Ultra Power Stand-by mode Carrier detection mode Low-power receiver mode Unlicensed frequency band Short range applications; meters
Ultra Power CMOS Transceiver
XE1209 CMOS Ultra Low-Power transceiver short-range frequency data communications system. uses 2-level Continuous Phase modulation. receiver section includes preamplifier, down-converter, channel filters, demodulator synchronizer, which delivers synchronized data output. transmitter section composed Direct Digital Synthesizer (DDS), power amplifier generating square-wave output current. XE1209 carrier detector detect presence signal carrier frequency. local clock based 32kHz crystal oscillator generate required Local oscillator (LO) frequency. XE1209 simple interface with external microcontroller.
APPLICATIONS
Remote control Short Range Wireless data Access control
ORDERING INFORMATION
Part number XE1209C012 Temperature range -10°C +60° Package SO20
Cool Connect
XEMICS e-mail: info@xemics.com web: www.xemics.com
Datasheet XE1209 Ultra Power CMOS Transceiver
DESCRIPTION
Name TEST VDDA QOUT VSSA IREF VREF SUPTEST VSSPA PAOUT DCLK DATA Description Test Ground digital Xtal input external clock Supply voltage analog Xtal Ground analog Iref node external resistance Vref node external capacitance Test Receiver enable input signal input signal Ground power amplifier power amplifier output Supply voltage digital Received data clock output Input/output stream output carrier detector Data enable 3-wire communication Data input 3-wire communication Clock input 3-wire communication
TYPICAL APPLICATION
product used system frequency data communications. transmission made with 2-level CPFSK modulation. modulated signal carrier frequency deviation frequency coding data following: fRFin fRFin "0". Figure below shows structure transceiver external components required application. 3-wire allows product receive configuration data from microcontroller. Note: TEST remains unconnected
Figure Application diagram
TEST SUPTEST VDDA
Cvdd
VSSA
68mH
Carrier Detector
Sine Filter
Pass Filter
Limiter
Demodulator DATA
68mH
150k
2.2nF
Preamp Sine Filter Pass Filter
Cvref 30uH 280K Riref
VREF
Current/ Voltage
Limiter
Synchronizer
DCLK
IREF
Sequencer
Power Management
Phase/ Frequency Detector
Loop Filter
Progr. Divider
XTAL Oscillator
Serial Interface
PAOUT VSSPA
Progr. Power
Phase
QOUT
Xtal
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Datasheet XE1209 Ultra Power CMOS Transceiver
Typical external components
Besides components needed communication itself, following external components required: Name Type Pins connected Value Cvdd Capacitor Cvref Capacitor VREF Riref Resistance IREF Xtal Crystal QOUT 32.768 reference crystal used Xtal following: "DS26 watch crystal" from Micro Crystal Switzerland Tolerance Max. Temp. variation over over ppm/K over
GENERAL FUNCTIONAL DESCRIPTION
XE1209 composed main functional blocks: Receiver receiver channel converts 2-level CPFSK modulated signal into stream. composed following blocks: preamplifier, down-converters (0-IF architecture), channel filters, limiters, demodulator, synchronizer. Transmitter transmitter performs modulation input bit-stream. main parts this block (Direct Digital Synthesizer), generating digital signal with modulated period, power amplifier generating square-wave output current controlled output DDS. Carrier detector function this block detect presence signal carrier frequency Clock generator clock generator composed quartz oscillator generating reference signal 32.768 kHz, (Phase Locked Loop), whose function deliver signal frequency which multiple oscillator output; multiplying factor programmable values. Service block This block provides whole circuit with required voltage references current sources. Digital part digital part main functions: implement 3-wire interface communication with external microcontroller. generate internal signals according selected mode operation content configuration register product four operating modes: standby mode (M1), where blocks powered this mode, oscillator either according value (called OSC) stored configuration register), carrier detector mode (M2), where only carrier detector active, transmitter mode (M3), where transmitter powered receiver mode (M4), where receiver powered
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Datasheet XE1209 Ultra Power CMOS Transceiver
input configuration register determine mode setting. Table gives status main blocks each mode.
standby Receiver Transmitter Carrier detector Clock generator Service block Digital part ON/off carrier detection
Table Mode selection
When oscillator (bit OSC=0), external clock applied QIN.
ABSOLUTE MAXIMUM RATINGS, OPERATING RANGES EXTERNAL CONDITIONS
Parameters Conditions Unit Storage temperature range Operating temperature range Operating supply voltage FREF_EXT reference External oscillator, 32.735 32.768 32.800 frequency VDD=2.6 temp=25 CL_CK External capacitate Full range supply load temperature IL_CK External leakage Full range supply current temperature RP_OSC Parasitic resistance Full range supply between pins QIN, temperature QOUT other ASIC CP_OSC Parasitic capacitance Full range supply between pins QIN, temperature QOUT other ASIC Stresses above those listed this clause cause permanent device failure. Exposure absolute maximum ratings extended periods affect device reliability. Electrostatic discharges: device withstands 2000 Volts Standardized Human Body Model pulses when tested according MIL883C method 3015.5 (pin combination Latch-up: Static latch-up protection level 30mA Symb STO_TR
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Datasheet XE1209 Ultra Power CMOS Transceiver
ELECTRICAL SPECIFICATIONS
Electrical specifications defined VDD=2.6 Temp=25 fc=36.86 kHz, data rate 1820 bit/s, unless otherwise specified. Symb IDDS1 IDDS2 Parameters Standby current Standby current Conditions Oscillator stopped Oscillator active, VDD=3V, Temp= +60°C, unloaded Temp Temp Load resistance ohms connected between PAOUT, programmable through 3-wire 0.15 Unit
IDD1 IDD2 ISINK
Supply current carrier detection mode (M2) Supply current receiver mode (M4) Sink current transmitter mode (peak value)
5.65 2.60 1.35
1.80 32.768 589.82 720.90 1000 36.86 45.05 5000 1820 1872
9.35 4.40 2.25 591.00 722.35
bit/s
FREF MAXIN ATT3 CMRR FDEV
reference frequency frequency differential input resistance differential input capacitance sensitivity Maximum effective input signal Transmission carrier frequency Adjacent channel rejection 30.6 Adjacent channel rejection 110.58 Common mode rejection ratio Receiver -3dB Bandwidth Data rate Frequency deviation Carrier detector level FC=36.86 rising edges measured output 900us time window RFSmin Rsource=100,BER=10 RFSmin Rsource=100,BER=10 RFSmin Rsource=100,BER=10 FC=36.86 kHz,
Programmable 3-wire 588.65 719.45 Rsource=100 BER=10 Without signal
parasitic
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Datasheet XE1209 Ultra Power CMOS Transceiver
Symb
Parameters Receiver Activation time
Conditions from carrier-detector mode with oscillator running temp =-10 +60°C
Unit
XOAC
Xtal oscillator activation time Logical level Logical high level
0.8*VDD
0.2*VDD
INPUT/OUTPUT SIGNALS Transmit Mode
transmitter composed power amplifier. 12-bits counter, which incremented 256+13 when input data 256-13 when input data This way, frequency deviation equal
FREF
Where multiplying factor PLL, FREF frequency reference clock. With N=18 FREF=32.768 kHz, expression gives f=1872 power amplifier delivers square wave current whose amplitude programmable (see configuration register section below). figure below shows shapes signals when, example, ISINK=110 transmitter processes input data real time without additional sampling filtering, which means that data rate does depend XE1209.
output
sink current
ISINK
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Datasheet XE1209 Ultra Power CMOS Transceiver
Receive Mode
data available receiver output valid between data period (1/DR) after rising edge clock (DCLK) shown figure below. received data rate must 1820 bit/s proper synchronizer operation. addition, synchronizer needs least transition (from from "1") every bits present input.
1/DR 1/DR 1/DR
DATA
DCLK
beginning reception, synchronizer needs receive preamble which sequence sent alternatively.
Carrier Detection Mode
Carrier Detection mode active when configuration register input signal present inputs amplified compared voltage threshold. When signal present input, comparator output square wave frequency equal frequency signal. This signal into 3-bit counter, whose output directly available DATA pin. this case, DATA signal square wave whose frequency carrier frequency.
(TR=0)
RFIN (shown square wave) DATA
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Datasheet XE1209 Ultra Power CMOS Transceiver
carrier detector set-up time (after input 4.85ms when carrier frequency 36.86 kHz. applications where carrier detector turned relative long period (tens hundreds ms), recommended reset block with short transition stand-by mode (RE=0). timing diagram carrier detection shown below when signal present input function programmed
PROGRAMMING DATA INTERFACE
Programming XE1209 performed through 3-wire interface shown below. enable signal goes same time falling edge (that with maximum delay between each other ns). From rising edge XE1209 will sample data present first falling edges whatever following sequence proper data transfer, data must stable microseconds before after each falling edge values well must kept constant (either VSS) during time where XE1209 effective modes
Configuration Register
content configuration register received data during 3-wire communication. described below. first
TEST
SENS
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Datasheet XE1209 Ultra Power CMOS Transceiver
Name SENS TEST
Description Carrier frequency Transmission flag Power level Power level Power level Carrier detector threshold Test flag Oscillator flag
Convention 45.05 Mode (RE=0) Mode (RE=1) 36.86 Mode (RE=0) Mode (RE=1) (see Table Normal mode External oscillator
Test mode Internal oscillator
Table Configuration register
Correspondence between word current sinked power amplifier shown below. words reserved test purposes. Power amplifier current
Table Sink current levels
(register)
(input pin)
Mode (standby) (carrier detector) (transmitter) (receiver)
Table Mode selection
Upon start-up, reset XE1209 required configuration register proper default mode. This done sending binary word 'b00000000 circuit using 3-wire bus, while setting "0".
XEMICS 2002 rights reserved. Reproduction whole part prohibited without prior written consent copyright owner. information presented this document does form part quotation contract, believed accurate reliable changed without notice. liability will accepted publisher consequence use. Publication thereof does convey imply license under patent other industrial intellectual property rights. XEMICS PRODUCTS DESIGNED, INTENDED, AUTHORIZED WARRANTED SUITABLE LIFE-SUPPORT APPLICATIONS, DEVICES SYSTEMS OTHER CRITICAL APPLICATIONS. INCLUSION XEMICS PRODUCTS SUCH APPLICATIONS UNDERSTOOD UNDERTAKEN SOLELY CUSTOMER'S RISK. Should customer purchase XEMICS products such unauthorized application, customer shall indemnify hold XEMICS officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs damages attorney fees which could arise.
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XE1209 FEATURES Single chip transceiver cost external compon

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