RX3930

the wireless IC company RX3930 Low Power ISM-band FM/FSK Receiver IC Advance Information 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 RX3930 is a low power 433/868/915 MHz FM/FSK receiver IC which is suitable for use in the North American 915 MHz and the European 433 and 868 MHz ISM bands. Features ! Integrated VCO with fixed ÷ 64 prescaler, phase/frequency detector, and reference oscillator forming complete phase-locked loop ! User selectable FM or FSK output ! RSSI output with 70 dB dynamic range ! Receiver enable pin for power saving ! TQFP-32 package (5mm x 5mm) Applications ! Wireless mouse ! Wireless amplifier/ speaker/ earphone/ microphone ! Wireless car alarm system Block Diagram OSC RXEN IN OSC OUT DO VSS4 VCC2 RES RES 32 VCC1 1 RXIN 2 31 OSC 30 29 28 27 26 25 24 QUAD 23 IF2 VCO PFD ÷ 64 OUT OUT VSS1 3 LNA OUT 4 VSS2 5 LNA BIAS COMPARATOR/ AUDIO AMP 22 FM 21 RSSI 20 MUTE MIXER MIX 6 IN VSS3 7 MIX 8 OUT IFAMP RSSI DEMOD LIMITER 19 VCC3 18 IF2 DEC 17 IF2 DEC 9 IFIN 10 IFIN 11 IF1 DEC 12 IF1 DEC 13 14 15 16 IF1 VREF VSS5 IF2 OUT IF IN Page 1 May 2001 Advance Information the wireless IC company RX3930 Package and Pin Assignment: TQFP-32 IF2DEC IF2DEC VCC3 MUTE RSSI FMOUT IF2OUT QUAD 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 RES RES VCC2 VSS4 DO OSCOUT OSCIN RXEN 25 26 27 28 29 30 31 32 IF2IN VSS5 VREFIF IF1OUT IF1DEC IF1DEC IFIN IFIN MIXOUT VSS3 MIXIN VSS2 LNAOUT VSS1 RXIN VCC1 Dimensions in mm Symbols min. A A1 A2 b C D1 D E1 E e L L1 θ1 ccc nom. max. 1.20 0.15 1.05 0.27 0.20 5.10 7.20 5.10 7.20 min. Dimensions in inch nom. max. 0.047 0.006 0.041 0.011 0.008 0.201 0.283 0.201 0.283 — 0.05 0.95 0.17 0.09 4.90 6.80 4.90 6.80 — — 1.00 0.22 — 0.002 0.037 0.007 0.003 0.193 0.267 0.193 0.267 — — 0.039 0.009 — 5.00 7.00 5.00 7.00 0.50(typ) 0.60 1.00(ref.) 3.5° — 0.197 0.275 0.197 0.275 0.02(typ) 0.024 0.039(ref.) — 0.45 — 0.75 — 0.018 — 0.029 — 0° — 7° 0.008 — 0° — 8° 0.003 3.5° — — — — Page 2 May 2001 Advance Information the wireless IC company RX3930 Pin Descriptions Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Name VCC1 RXIN VSS1 LNAOUT VSS2 MIXIN VSS3 MIXOUT IFIN IFIN IF1DEC IF1DEC IF1OUT VREFIF VSS5 IF2 IN IF2DEC IF2DEC VCC3 MUTE RSSI FMOUT IF2OUT QUAD RES RES VCC2 VSS4 DO I/O POWER I GND O GND I GND O I I I/O I/O O O GND I I/O I/O POWER I O O O I I/O I/O POWER GND I/O Supply DC bias for RF amplifier RF amplifier input Ground for RF amplifier LNA output Ground for 40dB IF limiting amplifier RF input to RF Mixer Ground for RF Mixer IF output from RF Mixer IF input (required 10nF DC blocking capacitor) Same as pin 9 except non-inverting node amplifier input DC feedback for 40dB limiting amplifier (required 100nF bypass capacitor) See pin 11 IF output from the 40 dB limiting amplifier DC voltage reference for the IF limiting amplifier (required 0.1 µF capacitor) Ground for 60dB IF limiting amplifier Inverting input to the 60dB limiting amplifier (required 10nF DC blocking capacitor) DC feedback node for the 60dB limiting amplifier (required 100nF bypass capacitor) See pin 17 Supply DC bias to the 60dB IF limiting amplifier Select FM, FSK, or mute at the FM OUT pin. (to Ground: FSK OUTPUT; floating: FM OUTPUT; to Vcc: muting) Proportional DC voltage (0.5V~2.5V) output Demodulated output IF output from the 60dB limiting strip FM demodulator input (not AC coupled) Supply DC voltage to VCO See pin 25 Supply DC bias to the VCO, prescaler, and PLL Ground shared by the VCO, prescaler, and PLL Output of the charge pump, and input to the VCO Description Page 3 May 2001 Advance Information the wireless IC company RX3930 Number 30 31 32 Name OSCOUT OSCIN RXEN I/O I/O I/O I Description Connected to the reference oscillator transistor base Connected to the emitter of the reference oscillator transistor Power up or down the RX3930. (logic high powers up the receiver and PLL; logic low powers down circuit to stand by mode) Page 4 May 2001 Advance Information the wireless IC company RX3930 Absolute Maximum Ratings VSS = 0 V Parameter Supply voltage Operating temperature range Storage temperature range Soldering temperature range Soldering time range Symbol VCC1 VCC2 TOPR TSTG TSLD tSLD Rating VSS – 0.5 to VSS + 5.5 –40 to 85 –40 to 150 255 10 Unit V °C °C °C s Recommended Operating Conditions VSS = 0 V Value Parameter Symbol min. VCC1 Supply voltage range VCC2 VCC3 Operating temperature TA 2.7 2.7 2.7 –10 typ. 3.6 3.6 3.6 25 max. 5.0 5.0 5.0 60 V V V Unit °C Page 5 May 2001 Advance Information the wireless IC company RX3930 Receiver Characteristics (VCC1, VCC2, VCC3 = 2.7 to 5.0 V, VSS = 0 V, RXEN = high, TA = –10 to 60 °C unless otherwise noted) Value Parameter Input RF frequency range Psens αLO BWIF = 150 KHz, fRF = 915 MHz, SNR = 8 dB Symbol Condition min. 300 typ. max. 1000 MHz Unit Sensitivity –97 dBm LO leakage –55 dBm Electrical Characteristics (VCC1, VCC2, VCC3 = 2.7 to 5.0 V, VSS = 0 V, RXEN = high, TA = –10 to 60 °C, fRF = 915 MHz unless otherwise noted) Value Parameter Power supply VCC1 supply voltage VCC2 supply voltage VCC3 supply voltage Total dc current (normal operation) Total dc current (stand-by mode) LNA Power gain Noise figure Input third-order intermodulation intercept point Mixer Conversion power gain Noise figure (SSB) Input third-order intermodulation intercept point VCO Frequency range External varactor 300 1000 MHz GC NFMIX IIP3MIX Matched to 50 Ω 7 17 –15.5 dB dB dBm GLNA NFLNA IIP3LNA Matched to 50 Ω 17 3.8 –8 dB dB dBm VCC1 VCC2 VCC3 IDC Istandby RXEN = low 2.7 2.7 2.7 3.6 3.6 3.6 10 1 5.0 5.0 5.0 V V V mA µA Symbol Condition min. typ. max. Unit Page 6 May 2001 Advance Information the wireless IC company RX3930 Value Parameter PLL N-divider ratio Reference frequency Charge pump current Lock time Symbol Condition min. typ. max. Unit 64 fREF ICP τlock PLL’s lock time set by bandwidth of external loop filter –40 17 40 MHz µA ms 10 IF amplifier Frequency range Input impedance Output impedance Limiter Frequency range Input impedance Output impedance RSSI RSSI dynamic range RSSI dc output range FM/FSK Demodulator Demodulated output level (audio) FSK output duty ratio VOD 40 70 50 60 mVrms % Rload = 51 KΩ 0.5 70 2.5 dB V Zin,IF Zout,IF 0.1 10.7 330 330 25 MHz Ω Ω Zin,IF Zout,IF 0.1 10.7 330 330 25 MHz Ω Ω Page 7 May 2001 Advance Information the wireless IC company RX3930 Application Circuit (906 MHz) 47N 2.7K Ctrim 100P RXEN 100P *:Alpha smv1233-11 3.3N 10K * 3.9N 10 VCC 47P 10N 2.7P 14.31818MHz 3.9N 32 10N VCC 12N RXIN 22P 47P 31 30 OSC OUT 29 DO 28 27 26 25 RES QUAD IF2 OUT FM OUT RSSI RXEN OSC IN VSS4 VCC2 RES **: 10.7MHz discriminator CDF-107B 15K 1 VCC1 2 RXIN 3 VSS1 8.2N LNA 24 23 22 21 ** 2.2P 10N FMOUT RSSI 10P MUTE 51K VCC 100P 47P 10N 4 OUT 5 VSS2 6 MIX IN MUTE 20 VCC3 19 IF2 DEC IF2 IFIN IF1 DEC IF1 DEC DEC VREF IF1 IF2 OUT IF VSS5 IN VCC 10N 47P 10N 7 VSS3 VCC 47P 10uA 10N 18 17 8 OUT IFIN MIX 10N 9 10N 10 11 12 13 14 15 16 10N 10N 10N 10N LT 10.7MS3 f 0 = 10.7MHz BW = 180KHz Page 8 May 2001