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LV2700V Dataheets PDF



Part Number LV2700V
Manufacturers Sanyo Semicon Device
Logo Sanyo Semicon Device
Description Spread Spectrum Communications IC
Datasheet LV2700V DatasheetLV2700V Datasheet (PDF)

Ordering number : EN *5651 Bi-CMOS LSI LV2700V Spread Spectrum Communications IC Preliminary Overview The LV2700V provides the reception and transmission functions necessary for half-duplex communication in spread-spectrum communications systems. • Band limiting filter (LPF) for data transmission [RX Block] • Spectrum despreader • Synchronization supplementation and protection • 236-MHz PLL • PN code generator (M sequence) • M sequence code length (31 or 63 chips) and tap switching • FSK (FM) .

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Ordering number : EN *5651 Bi-CMOS LSI LV2700V Spread Spectrum Communications IC Preliminary Overview The LV2700V provides the reception and transmission functions necessary for half-duplex communication in spread-spectrum communications systems. • Band limiting filter (LPF) for data transmission [RX Block] • Spectrum despreader • Synchronization supplementation and protection • 236-MHz PLL • PN code generator (M sequence) • M sequence code length (31 or 63 chips) and tap switching • FSK (FM) demodulator • Lock detector Features • Frequency conversion is not required. (direct signal processing at 236 MHz) • Wide spread-spectrum bandwidth (20 MHz) • Sanyo developed system for PN code synchronization • Allows direct primary modulation (FSK and FM) by data and analog signals. (Maximum data rate: 150 kbps) • Low-voltage operation (2.7 to 5.5 V) • Low power dissipation (36 mW in RX mode) Package Dimensions [LV2700V] Functions [TX Block] • Spectrum spreader • Crystal oscillator circuit • PN code generator (M sequence) • M sequence code length (31 or 63 chips) and tap switching • 9.83 MHz PLL SANYO: SSOP30 Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ratings 6 150 –20 to +75 –40 to +125 Unit V mW °C °C Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Allowable voltage range Symbol VCC VCCop Conditions Ratings 3 2.7 to 5.5 Unit V V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 63097HA(OT) No. 5651-1/9 LV2700V Electrical Characteristics at Ta = 25°C, VCC = 3 V, fc = 236 MHz, fm = 10 kHz, Vm = 0.2 Vp-p Parameter Symbol ICCOTX ICCORX VOTX VOTX WS TXVCC + VDD RFVCC + RXVCC + VDD TXDATAOUT, f = 10 kHz TXREOUT TXRFOUT Conditions Ratings min typ 8 12 max 11 16 Unit mA mA Quiescent current [TX Block] Modulated signal voltage RF output voltage Spread bandwidth [RX Block] Input sensitivity High level Demodulated output 1 Demodulated output 1 Total harmonic distortion Signal-to-noise ratio [CMOS-Level Interface] Input high-level voltage Input low-level voltage Output high-level voltage Output low-level voltage Input high-level current Input low-level current Input amplitude Crystal oscillator frequency conditions Input capacitance Low level 0.2 –35 19.7 Vp-p dBm MHz VSRX VORX1H VORX1L VORX2 THD RX S/N RFIN RXOUT RXOUT Pin 10 output w/o CEXT Pin 10 output w/o CEXT Pin 10 output w/o CEXT 45 240 300 0.5 55 2.5 –75 dBm V 0.4 V mVrms 2 % dB VIH VIL VO H VOL IIH IIL VIN XOSC CIN Pins 11 to 15, 17 Pins 11 to 15, 17 Pins 8, 9 Pins 8, 9 Pins 11 to 15, 17 Pins 11 to 15, 17 VCOIN XIN, XOUT RFIN, XIN, VCOIN 2.1 0.6 2.5 0.4 5 5 –16 5 2.5 13 V V V V µA µA dBm MHz pF No. 5651-2/9 Block Diagram LV2700V Synchronization control Strong field detector No. 5651-3/9 LV2700V Pin Functions Pin No. 1 Pin RFVCC Pin voltage(V) Pin function RF block power supply Equivalent circuit 2 REXT 0.2 Connection for the external capacitor and resistor used by the internal RF amplifier 3 RFIN 1 RF input 4 RFGND RF block ground 5 ANTDUMP 1.2 Output for the DC voltage used under strong reception conditions to prevent saturation of the RF amplifier. Voltage variability range: about 0.5 V 6 RXVCC Reception block power supply 7 BIASIN DC bias voltage for the demodulation signal processing block (LPF, amplifier, limiter) 8 RXOUT Demodulated data output (This is an open drain output.) 9 LOCK DET Outputs a high level when PN code synchronization is established. (This is a CMOS-level output.) 10 CEXT Same as V7 Amplifier output for demodulated output. The pin 8 output data is made valid by connecting a capacitor between this pin and ground. Continued on next page. No. 5651-4/9 LV2700V Continued from preceding page. Pin No. Pin Pin voltage(V) Pin function Turns the optimal PN code synchronization control on or off. Control is turned on by a high level input. Equivalent circuit 11 CTRL 12 PNT1 Tap selection for the PN code (M sequence) Tap selection for the PN code (M sequence). These pins select one of three code types. PNT1 0 13 PNT2 0 1 1 0 = Low 1 = High PNT2 0 1 0 1 PN code CODE1 CODE2 CODE3 14 PNL PN code length selection High: 63 chips Low: 31 chips Send/receive mode selection. High: Transmission Low: Reception CMOS block power supply Transmission data input (CMOS levels). Do not apply analog signals to this pin. 15 TX/RX 16 VDD 17 TX DATAIN 1.7 18 TX DATAOUT 0.7 1Vp-p Transmission data output. The output signal is band limited to 300 kHz and voltage limited to 1 Vp-p. CMOS block ground 19 20 DGND XIN 1/2VCC Input for the 9.8304 MHz reference oscillator inverter. Output for the 9.8304 MHz reference oscillator inverter. Add a resistor of about 1 MΩ between XIN and XOUT. 21 XOUT 1/2VCC A06924 22 TXLPF 1.5 Connection for the 9.


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