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 13 PD VSS1 CHARGE PUMP CRYSTAL OSCILLATOR VCO DATA FILTER ÷ 64 PFD RSSI LOG AMP PEAK DETECTOR 1-BIT COMPARATOR MIXER IF FILTER IF DC2 IF DC1 1 2 MIX OUT IFIN 3 4 LNA MIX IN VCC 5 6 RF OUT 7 Page 1 VSS2 8 ASK REF RFIN 9 10 ASK OUT 11 PEAK 12 March 2001 RX3400 the wireless IC company Package and Pin Assignment SSOP-24 (0.64 mm pitch) 1 24 XTAL2 IFDC2 2 23 XTAL1 IFIN 3 22 DF2 MIXOUT 4 21 DF1 VCC 5 MIXIN 6 RFOUT 7 VSS2 8 RFIN 9 HiMARK RX3400 IFDC1 19 DO 18 NC 17 NC 16 VCO2 ASKREF 10 15 VCO1 ASKOUT 11 14 PD 13 VSS1 PEAK 12 Dimensions in mm 20 DF0 Dimensions in inch Symbols min. nom. max. min. nom. max. A 1.35 1.60 1.75 0.053 0.064 0.069 A1 0.10 — 0.25 0.004 — 0.010 A2 — 1.45 — — 0.057 — b 0.20 0.25 0.30 0.008 0.010 0.012 C 0.19 — 0.25 0.007 — 0.010 D 8.55 — 8.75 0.337 — 0.344 E 5.80 — 6.20 0.228 — 0.244 E1 3.80 — 4.00 0.150 — 0.157 e — 0.64 — — 0.025 — L 0.40 — 1.27 0.016 — 0.050 y — — 0.10 — — 0.004 θ 0° — 8° 0° — 8° Page 2 March 2001 RX3400 the wireless IC company Pin Descriptions Number Name 1 IFDC1 2 IFDC2 3 IFIN 4 MIXOUT 5 VCC 6 Description Number Name IF amplifier feedback decoupling connections 13 VSS1 14 PD IF amplifier input 15 VCO1 Mixer output 16 VCO2 Open collector differential VCO outputs Nominal 5 V supply 17 RSSI RSSI output MIXIN RF mixer input 18 NC No connection 7 RFOUT Open collector LNA output 19 DO Loop filter output 8 VSS2 LNA ground 20 DF0 9 RFIN LNA input 21 DF1 10 ASKREF Comparator reference level 22 DF2 11 ASKOUT Comparator output 23 XTAL1 12 PEAK Peak detector output 24 XTAL2 Page 3 Description Ground PLL power down Data filter external connections Crystal oscillator external connections March 2001 RX3400 the wireless IC company Absolute Maximum Ratings VSS = VSS1 = VSS2 = 0 V Parameter Symbol Rating Unit Supply voltage VCC VSS – 0.5 to VSS + 8.0 V Operating temperature range TOPR –40 to 85 °C Storage temperature range TSTG –55 to 150 °C Soldering temperature range TSLD 255 °C Soldering time range tSLD 10 s Recommended Operating Conditions VSS1 = VSS2 = 0 V Value Parameter Symbol Unit min. typ. max. 5.0 7.0 V 460 MHz 60 °C Supply voltage range VCC 4.75 RF input frequency fRFIN 290 TA –10 Operating temperature Page 4 25 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 Symbol Condition Unit min. Current consumption Current consumption (PLL off) Sensitivitya Signal handlingb typ. max. ICC,total VCC = 5 V 2.4 3.0 mA ICC,noPLL VCC = 5 V; VPD = 0 V 1.8 2.4 mA αSENS fRFIN = 434 MHz; 2 KB/s –103 –100 dBm αSH fRFIN = 434 MHz; 2 KB/s -30 dBm Integrated IF filter –3-dB low pass cutoff frequency fIF,–3dB Adjacent channel rejectionc αACR 65 dB Peak detector source current Ipeak 500 µA Peak detector leakage current Ileak Charge pump source/sink current ICP 450 550 750 250 KHz nA µA ±30 PD logic HIGH input voltage VIH,PD VCC – 0.5 VCC + 0.5 V PD logic LOW input voltage VIL,PD VSS2 – 0.5 VSS2 + 0.5 V ASKOUT logic HIGH output voltage VOH,ASKOUT Iload = 10 µA ASKOUT logic LOW output voltage VOL,ASKOUT Iload = 10 µA 0.7 × VCC V 0.3 × VCC 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 αACR [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 µA. 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 IF DC1 XTAL2 IF DC2 XTAL1 IFIN DF2 MIX OUT DF1 100 pF 24 23 22 220 pF 4 Vcc 1 *27 nH Vcc 1 1 uF 6 MIX IN *56 pF 7 100 pF 8 ANT *100 pF VCC 9 *56 nH *8.2 pF 10 11 RF OUT RX3400 5 VSS2 DF0 DO RFIN VCO2 ASK REF VCO1 ASK OUT PD 150 pF 21 220 pF 20 19 NC 18 NC 100 pF NC 17 NC 33 pF 47 K Ω 16 15 27 nH BB833 18 K Ω 14 33 pF 560 pF 12 PEAK VSS1 13 47KΩ 4.3K Ω 1 MΩ 1 uF Data O/P Power Down *: mean “Layout Dependent” Page 7 March 2001