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| RX3400 Low Power ASK Receiver IC the wireless IC company HiMARK Technology, Inc. reserves the right to change the product described in this datasheet. All information contained in this datasheet is subject to change without prior notice. HiMARK Technology, Inc. assumes no responsibility for the use of any circuits shown in this datasheet. Description The RX3400 is a low power ASK receiver IC which is fully compatible with the Mitel KESRX01 IC and is suitable for use in a variety of low power radio applications including remote keyless entry. The RX3400 is based on a single-conversion, super-heterodyne receiver architecture and incorporates an entire phase-locked loop (PLL) for precise local oscillator generation. In addition, the RX3400 provides an RSSI output. Features Extremely low power operation Low external part count Receiver input frequency: 290 - 460 MHz On-chip VCO with integrated PLL using crystal oscillator reference PLL power down feature Integrated IF and data filters RSSI output SSOP-24 package (0.64 mm pitch) Applications Wireless mouse Video sender remote controller Car alarm and home security systems Block Diagram 24 XTAL2 23 XTAL1 22 DF2 21 DF1 20 DF0 19 DO 18 NC 17 RSSI 16 VCO2 15 VCO1 14 PD 13 VSS1 CHARGE PUMP CRYSTAL OSCILLATOR DATA FILTER PFD VCO / 64 LOG AMP IF FILTER RSSI PEAK MIXER LNA ASK REF ASK OUT DETECTOR 1-BIT COMPARATOR IF DC1 IF DC2 IFIN MIX OUT VCC MIX IN RF OUT VSS2 RFIN PEAK 1 2 3 4 5 6 7 8 9 10 11 12 Page 1 March 2001 RX3400 the wireless IC company Package and Pin Assignment SSOP-24 (0.64 mm pitch) IFDC1 IFDC2 IFIN MIXOUT VCC MIXIN RFOUT VSS2 RFIN 1 2 3 24 XTAL2 23 XTAL1 22 DF2 21 DF1 20 DF0 19 DO 18 NC 17 NC 16 VCO2 15 VCO1 14 PD 13 VSS1 HiMARK RX3400 4 5 6 7 8 9 ASKREF 10 ASKOUT 11 PEAK 12 Dimensions in mm Symbols min. A A1 A2 b C D E E1 e L y Dimensions in inch max. 1.75 0.25 -- 0.30 0.25 8.75 6.20 4.00 -- 1.27 0.10 8 min. 0.053 0.004 -- 0.008 0.007 0.337 0.228 0.150 -- 0.016 -- 0 nom. 0.064 -- 0.057 0.010 -- -- -- -- 0.025 -- -- -- max. 0.069 0.010 -- 0.012 0.010 0.344 0.244 0.157 -- 0.050 0.004 8 nom. 1.60 -- 1.45 0.25 -- -- -- -- 0.64 -- -- -- 1.35 0.10 -- 0.20 0.19 8.55 5.80 3.80 -- 0.40 -- 0 Page 2 March 2001 RX3400 the wireless IC company Pin Descriptions Number 1 2 3 4 5 6 7 8 9 10 11 12 Name IFDC1 IFDC2 IFIN MIXOUT VCC MIXIN RFOUT VSS2 RFIN ASKREF ASKOUT PEAK Description IF amplifier feedback decoupling connections IF amplifier input Mixer output Nominal 5 V supply RF mixer input Open collector LNA output LNA ground LNA input Comparator reference level Comparator output Peak detector output Number 13 14 15 16 17 18 19 20 21 22 23 24 Name VSS1 PD VCO1 VCO2 RSSI NC DO DF0 DF1 DF2 XTAL1 XTAL2 Crystal oscillator external connections Data filter external connections Ground PLL power down Open collector differential VCO outputs RSSI output No connection Loop filter output Description Page 3 March 2001 RX3400 the wireless IC company Absolute Maximum Ratings VSS = VSS1 = VSS2 = 0 V Parameter Supply voltage Operating temperature range Storage temperature range Soldering temperature range Soldering time range Symbol VCC TOPR TSTG TSLD tSLD Rating VSS - 0.5 to VSS + 8.0 -40 to 85 -55 to 150 255 10 Unit V C C C s Recommended Operating Conditions VSS1 = VSS2 = 0 V Value Parameter Supply voltage range RF input frequency Operating temperature Symbol min. VCC fRFIN TA 4.75 290 -10 25 typ. 5.0 max. 7.0 460 60 V MHz Unit C Page 4 March 2001 RX3400 the wireless IC company Electrical Characteristics (VCC = 4.75 to 7.0 V, VSS1 = VSS2 = 0 V, TA = -40 to 85 C unless otherwise noted) Value Parameter Current consumption Current consumption (PLL off) Sensitivitya Signal handlingb Integrated IF filter -3-dB low pass cutoff frequency Adjacent channel rejectionc Peak detector source current Peak detector leakage current Charge pump source/sink current PD logic HIGH input voltage PD logic LOW input voltage ASKOUT logic HIGH output voltage ASKOUT logic LOW output voltage Symbol ICC,total ICC,noPLL SENS SH fIF,-3dB ACR Ipeak Ileak ICP VIH,PD VIL,PD VOH,ASKOUT VCC - 0.5 VSS2 - 0.5 Condition min. VCC = 5 V VCC = 5 V; VPD = 0 V fRFIN = 434 MHz; 2 KB/s fRFIN = 434 MHz; 2 KB/s -30 450 550 65 500 250 30 VCC + 0.5 VSS2 + 0.5 Unit typ. 2.4 1.8 -103 max. 3.0 2.4 -100 mA mA dBm dBm 750 KHz dB A nA A V V V 0.3 x VCC Iload = 10 A Iload = 10 A 0.7 x VCC VOL,ASKOUT V a. Sensitivity is defined as the minimum average signal level measured at the input which is necessary to achieve a bit error rate of 0.01 when the input signal is a return-to-zero (RZ) pulse with an average duty cycle of 50%. The RF input is assumed to be matched to 50 ohms. b. Signal handling is defined as the maximum input signal capable of being successfully demodulated. It is assumed that the input signal is ASK modulated with a minimum extinction ratio of 40 dB. The RF input is assumed to be matched to 50 ohms. c. Adjacent channel rejection is defined for an interfering tone ACR [dB] above the receiving threshold and 10 MHz offset from the carrier giving a 3 dB reduction in sensitivity. Page 5 March 2001 RX3400 the wireless IC company Functional Description The RX3400 ASK receiver IC incorporates an LNA; mixer; PLL-based local oscillator including VCO, fixed divider (/ 64), reference crystal oscillator, phase-frequency detector (PFD), and charge pump; IF filter; logarithmic amplifier; data filter; peak detector; and 1bit comparator and is capable of demodulating ASK input signals. PLL Power-down Function The PLL portion of the IC can be powered up and down through the control of the PD input (pin 14). During PLL power down operation, the reference crystal oscillator, fixed VCO divider, PFD, and charge pump are all shut off and the current consumption of the IC drops by approximately 600 A. The VCO circuitry remains on and may be configured to operate as a buffer amplifier for an external SAW-based oscillator. 1-bit Comparator The integrated 1-bit comparator operates as a data slicer and "squares up" the data filtered RSSI output from the logarithmic amplifier. The decision threshold voltage level for the 1-bit comparator is stored on an external capacitor connected to the ASKREF pin. Page 6 March 2001 RX3400 the wireless IC company Application Circuit 434 MHz 100 nF 100 nF 6.775 MHz 1 2 3 220 pF IF DC1 IF DC2 IFIN MIX OUT XTAL2 XTAL1 DF2 DF1 DF0 DO 24 23 22 21 20 19 100 pF 100 pF 4 5 Vcc 1 150 pF 220 pF RX3400 RX3400 RX3400 RX3400 VCC MIX IN RF OUT VSS2 RFIN Vcc 1 1 uF *27 nH 100 pF 6 *56 pF 7 8 NC 18 NC 17 NC ANT NC 33 pF 47 K *100 pF *56 nH *8.2 pF 9 10 11 12 VCO2 VCO1 PD VSS1 16 15 14 13 27 nH BB833 18 K 33 pF 560 pF ASK REF ASK OUT PEAK 47K 4.3K 1 uF 1 M Data O/P Power Down *: mean "Layout Dependent" Page 7 March 2001 |
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