Preliminary Information SATURN SATURN CDMA/AMPS dual Band IF Receiver for Digital Phones Preliminary Information DS4721 Issue 4.2 April 1999 Features ● Selectable IF input buffers with characteristic impedance suitable for interface to IF CDMA and FM SAW filter outputs ● AGC amplifiers with 90dB of variable gain, fully compensated for temperature variation ● IQ demodulator with accurately defined output DC level and low DC offsets ● LO operating at twice frequency with high accuracy quadrature generation ● Sophisticated power management control operation ● Overload indicator Odering Information SATURN/KG/QP1S SATURN/KG/QP1T Description The SATURN circuit is designed for use in dual band dual mode mobile phones (CDMA/AMPS). The circuit is designed to be compataible with digital baseband and mixed signal circuit chips from Mitel (Planet Chip-set) and Qualcomm (MSM2 and BBA). A wideband AGC amplifier allows the input of CDMA or AMPS signal paths with a range power management control options. IF OUT IF VEE IF VCC FM IFIN I OUT CDMA IFIN Q OU T AGC Gain Control Temperature Comp. DLL PRESCALER Overload Indicator STARTUP ENABLE BAND 1900 Mode Control VHF VCC MODE CDM VHF VEE VHF BUF VHF RES OVERLOAD DET Figure 1 Block diagram 1 SATURN Preliminary Information IF VCC IF OUTB IF OUT IF VEE GND CDMA IFIN CDMA IFINB FM IFIN FM IFINB AGC AGCB MODE CDMA ENABLE GND VHF VCC I OUTB I OUT VHF VEE OVERLOAD DET VHF RES VHF RESB BAND 1900 VHF BUF VHF BUFB GND Q OUT Q OUTB STARTUP QSOP28 Figure 2 Pin Connections Pin Description 2 Pin No Pin Name 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 IF VCC IF OUTB IF OUT IF VEE GND CDMA IFIN CDMA IFINB FM IFIN FM IFINB AGC AGCB MODE CDMA ENABLE GND STARTUP QOUTB OUT GND VHF BUFB VHF BUF BAND 1900 VHF RESB VHF RES OVERLOAD DET VHF VEE I OUT I OUTB VHF VCC Description Supply for IF inputs and AGC blocks Post AGC IF output Post AGC IF output Ground for IF inputs and AGC blocks Substrate ground Post SAW IF input (CDMA) Post SAW IN input (CDMA) Post SAW IF input (FM) Post SAW IF inputs (FM) (AC ground) AGC Control for IF section AGC control for IF sections (AC ground) CDMA/FM mode select Power up AGC sections of device Substrate Ground Power up Oscillator, DLL and Mixer sections of the device Q channel baseband output Q Channel baseband output Ground VHF oscillator buffered output for synthesiser VHF oscillator buffered output for synthesiser VHF oscillator tuning band select input VHF VCO resonator VHF VCO resonator Overload detector output Ground for VHF VCO and DLL blocks I channel baseband output I channel baseband output Supply for VHF and DLL blocks Preliminary Information SATURN Electrical Characteristics (Mode Control) Description ENAVLE STARTUP MODE CDMA BAND 1900 Conditions Standby Mode 0 0 X X All circuits powered down except logic inputs Start up Mode 0 1 X 1 For high band IF (210.38MHz) 0 1 X 0 For low band IF (85.38MHz) Turns on VCO circuits, DLL quadrature generation, prescaler and IQ demodulator. All other circuits remain powered down CDMA mode 1 1 1 1 For high band IF (210.38MHz) 1 1 1 0 For low band IF (85.38MHz) All circuits operational except for IF output buffer, CDMA input stage selected. FM Mode 1 1 0 0 All circuits operational except for IF output buffer, FM input stage selected. Alternative FM mode 1 1 0 1 Note 4 CDMA IF AGC only mode 1 0 1 X Demodulator and LO generation circuitry powered down. IF output buffer enabled FM IF AGC 1 0 0 X Demodulator and LO generation circuitry powered down. IF output buffer enabled. X = Don’t Care Notes 1. STARTUP mode is provided to allow VCO/DLL/prescalers to stabilise before signal path is activated. This is a power-saving feature since the signal path is redundant during this period. If this feature is not required, the ENABLE and STARTUP control pins can be shorted together so that all circuitry is activated at the same time. 2. In high band mode (Band 1900 = 1) the VCO operates at twice the IF frequency. For example if IF = 210.38MHz then the oscillator operates at 420.76MHz. A delay locked loop (DLL) circuit then generates the quadrature LO signals. The prescaler output, VHFBUF, is VCO frequency divided by 8 (52.494MHz). 3. In low band mode (Band 1900 = 0) the VCO operates at 4 times the IF frequency. for example if IF = 85.38MHz the oscillator operates at 341.52MHz. This is then divided and uses DLL circuit to provide the quadrature LO signals. The prescaler output, VHFBUF, is VCO frequency divided by 8 (42.69MHz). 4 This mode can be used for FM. The VCO operates at twice the LO frequency. This mode is not normally used as a large tuning range is required on the VCO. Prescaler output is LO frequency divided by four. 3 SATURN Preliminary Information Absolute Limits Description Min Typ Supply Voltage Max Units 4.0 Volts Comments Operation temperature, Tamb -30 +85 °C Storage temperature, Tstg -40 +125 °C Junction temperature, Tj -30 +125 °C 350 mW Vcc+0.6 Volts All pins except Vcc and GND All pins except Vcc and GND Power dissipation Maximum Pin Voltage Minimum Pin Voltage -0.6 Volts ESD voltage 1.75 kV Ambient temperature Human Body Model Electrical Characteristics (DC specifications) Tamb= 30°C to +70°C, Vcc = +2.7 to +3.6. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage unless otherwise stated. Characteristic Value Min Typ Units Conditions Max General Supply Voltage 2.7 3.0 3.6 Operating temperature -30 27 85 Current Consumption Standby Mode 0.03 0.1 Startup Mode 8 13 CDMA Mode 14 23 FM Mode 14 23 CDMA AGC only Mode 8 13 FM AGC only Mode 11 18 Mode Control Logic CMOS input logiv high, VIH Vcc-0.5 Vcc+0.1 CMOS input high current, IIH -10 10 CMOS input low current, IIL -10 10 Switching time between any two Modes 3 AGC Control 0.1 2.6 AGC Input impedance 100 130 160 DC Common Mode voltages I OUT, I OUTB (CDMA Mode) Vcc-0.8 Vcc-0.6 Vcc-0.4 I OUTB, QOUTB I OUT< Q OUT (FM Mode) Vcc-0.8 Vcc-0.6 Vcc-0.4 I OUTB, Q OUTB V °C All Vcc Pins Ambient See note 1 mA mA mA mA mA mA V µA µA ms V kΩ All logic inputs All logic inputs All logic inputs V V Note 1. Specifications are guaranteed over -30 to + 70°C, however operation is guaranteed over the extended range of -30 to +85°C with minimal variation in specified parameters. 4 Preliminary Information SATURN Electrical Characteristics (AC specifications) Continued Tamb= 30°C to +70°C, Vcc = +2.7 to +3.6. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage unless otherwise stated. Frequency = 210.38MHz Characteristic CDMA AGC Max Voltage Gain to demodulator output Min Voltage Gain to demodulator output Max Voltage Gain to IF buffer output Min voltage Gain to IF buffer output AGC control Max AGC control Min Gain slope Gain slope linearity Gain temperature stability Channel gain variation @ 210.38MHz NFGainmax Input V1dBGainmin IIP3Gainmin Input impedance IF Frequency CDMA to Amps isolation Value Min Typ 48 50 42 -47 -43 -51 -49 2.6 0.1 40 90 2 0.1 5.5 110 104 114 50 30 Conditions dB To demodulator outputs dB To demodulator Max -55 6 -2 -0.1 Units dB dB V V dB/V dB/V dB dB 6.5 dB dBµV dBµV dBµV Ω 250 MHz dB 120 500 IF AGC only mode IF AGC only mode Gain = Gain max Gain = Gain min Over gain control range Within channel bandwidth Rs (500Ω) Minimum gain Power (500Ω) Minimum gain With addition of external resistor across IF inputs 5 SATURN Preliminary Information Electrical Characteristics (AC specifications) Continued Tamb= 30°C to +70°C, Vcc = +2.7 to +3.6. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage unless otherwise stated. Frequency = 85.38MHz Characteristic FM AGC Max Voltage Gain to demodulator output Min Voltage Gain to demodulator output Max Voltage Gain to OF buffer output Min voltage Gain to IF buffer output AGC control Max AGC control Min Gain slope Gain slope linearity Gain temperature stability NFGainmax Input V1dBGainmin IIP3Gainmin Input Impedance IF Frequency VHF Local Oscillator Quaderature generation LO input Frequency VCO Phase noise VCO Noise floor VCO buffer output VCO buffer output impedance Value Min Typ 52 54 -49 54 -47 59 -48 -42 2.6 0.1 40 6 -2 98 103 80 2 6 105 113 850 50 250 100 -100 500 -98 -130 350 100 Note 1: Phase noise is specified at the LO input to the mixers. 6 Units Conditions dB To demodulator outputs dB To demodulator Max dB dB V V dB/V dB/V dB dB dBµV dBµV Ω IF AGC only mode IF AGC only mode Gain = Gain max Gain = Gain min Over gain control range For any gain setting 850Ω source Minimum gain Minimum gain With addition of external resistor across IF inputs MHz MHz dBc/Hz @30kHz, Hiband mode Minimum tank Q=15 Note 1 dBc/Hz @>3MHz, Note 1 mV pk-pk single ended Ω Differential Preliminary Information SATURN Electrical Characteristics (AC specifications) Continued Tamb= 30°C to +70°C, Vcc = +2.7 to +3.6. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage unless otherwise stated. Characteristic Value Min Typ Units Max Demodulator Output I/Q Gain matching I/Q Phase matching Output impedance Baseband Bandwidth Output IP3 Baseband differential DC offset Overload Detect CDMA Mode FM Mode Conditions I OUT, I OUTB, Q OUT, Q OUTB 3 117 0.1 0.5 4 50 0.25 2 5 119 3.5 dB deg kΩ MHz Differential Defined by on-chip first order low-pass filter dBµV mV Referred to baseband outputs 104 106 dBµV dBµV 7 http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. 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