Datasheet SATURN, SATURNKG, SATURNQP1S, SATURNQP1T Datasheet (MITEL)

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Preliminary Information SATURN

SATURN

CDMA/AMPS dual Band IF Receiver for Digital Phones

Preliminary Information

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.

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

DS4721 Issue 4.2 April 1999

Odering Information

SATURN/KG/QP1S SATURN/KG/QP1T

Figure 1 Block diagram

Temperature

Comp.

DLL

I OUT

IF OUT

FM IFIN

Q OU T

Gain

Control

Mode

Control

CDMA IFIN

AGC

STARTUP

ENABLE

MODE CDM

VHF BUF

VHF RES

PRESCALER

Overload Indicator

OVERLOAD DET

BAND 1900

VHF VCC

VHF VEE

IF VCC

IF VEE

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SATURN Preliminary Information

Figure 2 Pin Connections

QSOP28

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

Pin Description

Pin No Pin Name Description

1 IF VCC Supply for IF inputs and AGC blocks 2 IF OUTB Post AGC IF output 3 IF OUT Post AGC IF output 4 IF VEE Ground for IF inputs and AGC blocks 5 GND Substrate ground 6 CDMA IFIN Post SAW IF input (CDMA) 7 CDMA IFINB Post SAW IN input (CDMA) 8 FM IFIN Post SAW IF input (FM)

9 FM IFINB Post SAW IF inputs (FM) (AC ground) 10 AGC AGC Control for IF section 11 AGCB AGC control for IF sections (AC ground) 12 MODE CDMA CDMA/FM mode select 13 ENABLE Power up AGC sections of device 14 GND Substrate Ground 15 STARTUP Power up Oscillator, DLL and Mixer sections of the device 16 QOUTB Q channel baseband output 17 OUT Q Channel baseband output 18 GND Ground 19 VHF BUFB VHF oscillator buffered output for synthesiser 20 VHF BUF VHF oscillator buffered output for synthesiser 21 BAND 1900 VHF oscillator tuning band select input 22 VHF RESB VHF VCO resonator 23 VHF RES VHF VCO resonator 24 OVERLOAD DET Overload detector output 25 VHF VEE Ground for VHF VCO and DLL blocks 26 I OUT I channel baseband output 27 I OUTB I channel baseband output 28 VHF VCC Supply for VHF and DLL blocks

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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 1 0 1 X Demodulator and LO

only mode 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.

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SATURN Preliminary Information

Electrical Characteristics (DC specifications)

amb

= 30°C to +70°C, V

= +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 Units Conditions

Min Typ Max General Supply Voltage 2.7 3.0 3.6 V All Vcc Pins Operating temperature -30 27 85 °C Ambient See note 1 Current Consumption Standby Mode 0.03 0.1 mA Startup Mode 8 13 mA CDMA Mode 14 23 mA FM Mode 14 23 mA CDMA AGC only Mode 8 13 mA FM AGC only Mode 11 18 mA

Mode Control Logic

CMOS input logiv high, VIH Vcc-0.5 Vcc+0.1 V All logic inputs CMOS input high current, IIH -10 10 µA All logic inputs CMOS input low current, IIL -10 10 µA All logic inputs Switching time between any two Modes 3 ms AGC Control 0.1 2.6 V AGC Input impedance 100 130 160 kΩ

DC Common Mode voltages

I OUT, I OUTB (CDMA Mode) Vcc-0.8 Vcc-0.6 Vcc-0.4 V I OUTB, QOUTB I OUT< Q OUT (FM Mode) Vcc-0.8 Vcc-0.6 Vcc-0.4 V I OUTB, Q OUTB

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.

Absolute Limits

Description Min Typ Max Units Comments

Supply Voltage 4.0 Volts Operation temperature, Tamb -30 +85 °C Ambient temperature Storage temperature, Tstg -40 +125 °C Junction temperature, Tj -30 +125 °C Power dissipation 350 mW Maximum Pin Voltage Vcc+0.6 Volts All pins except Vcc and GND Minimum Pin Voltage -0.6 Volts All pins except Vcc and GND ESD voltage 1.75 kV Human Body Model

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Preliminary Information SATURN

Electrical Characteristics (AC specifications) Continued

amb

= 30°C to +70°C, V

= +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 Value Units Conditions

Min Typ Max CDMA AGC Max Voltage Gain to demodulator 48 50 dB To demodulator outputs output Min Voltage Gain to demodulator -55 -47 dB To demodulator output Max Voltage Gain to IF buffer output 42 -43 dB IF AGC only mode Min voltage Gain to IF buffer output -51 -49 dB IF AGC only mode AGC control Max 2.6 V Gain = Gain max AGC control Min 0.1 V Gain = Gain min Gain slope 40 dB/V Gain slope linearity 6 90 dB/V Over gain control range Gain temperature stability -2 2 dB Channel gain variation -0.1 0.1 dB Within channel bandwidth @ 210.38MHz NF

Gainmax

5.5 6.5 dB Rs (500Ω)

Input V1dB

Gainmin

110 dBµV Minimum gain

104 dBµV Power (500Ω) IIP3

Gainmin

114 120 dBµV Minimum gain Input impedance 500 Ω With addition of external

resistor across IF inputs IF Frequency 50 250 MHz CDMA to Amps isolation 30 dB

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SATURN Preliminary Information

Electrical Characteristics (AC specifications) Continued

amb

= 30°C to +70°C, V

Characteristic Value Units Conditions

Min Typ Max

FM AGC

Max Voltage Gain to demodulator 52 54 dB To demodulator outputs output Min Voltage Gain to demodulator -49 -47 dB To demodulator output Max Voltage Gain to OF buffer output 54 59 dB IF AGC only mode Min voltage Gain to IF buffer output -48 -42 dB IF AGC only mode AGC control Max 2.6 V Gain = Gain max AGC control Min 0.1 V Gain = Gain min Gain slope 40 dB/V Gain slope linearity 6 80 dB/V Over gain control range Gain temperature stability -2 2 dB For any gain setting NF

Gainmax

6 dB 850Ω source

Input V1dB

Gainmin

98 105 dBµV Minimum gain

IIP3

Gainmin

103 113 dBµV Minimum gain

Input Impedance 850 Ω With addition of external

resistor across IF inputs IF Frequency 50 250 MHz VHF Local Oscillator Quaderature generation LO input Frequency 100 500 MHz VCO Phase noise -100 -98 dBc/Hz @30kHz, Hiband mode

Minimum tank Q=15 Note 1 VCO Noise floor -130 dBc/Hz @>3MHz, Note 1 VCO buffer output 350 mV pk-pk single ended VCO buffer output impedance 100 Ω Differential

Note 1: Phase noise is specified at the LO input to the mixers.

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Preliminary Information SATURN

Electrical Characteristics (AC specifications) Continued

amb

= 30°C to +70°C, V

= +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 Units Conditions

Min Typ Max

Demodulator Output I OUT, I OUTB, Q OUT, Q OUTB

I/Q Gain matching 0.1 0.25 dB I/Q Phase matching 0.5 2 deg Output impedance 3 4 5 kΩ Differential Baseband Bandwidth 50 MHz Defined by on-chip first order

low-pass filter Output IP3 117 119 dBµV Baseband differential DC offset 3.5 mV Overload Detect Referred to baseband outputs CDMA Mode 104 dBµV FM Mode 106 dBµV

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