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Details, datasheet, quote on part number:QP1S
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| Part: | QP1S |
| Category: | Communication => Telephony => Tone Receiver |
| Description: | Cdma/amps Dual Band if Receiver For Digital Phones |
| Company: | Mitel Networks Corporation |
| Datasheet: | Download QP1S datasheet File size : 117 kB |
| Request For quote: | Find where to buy QP1S
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Datasheet text preview:
Preliminary Information
SATURN
SATURN
CDMA/AMPS dual Band IF Receiver for Digital Phones Preliminary Information
DS4721 Issue 4.2 April 1999
Features
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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
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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.
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IF VCC
IF VEE
IF OUT
FM IFIN
I OUT
CDMA IFIN
Q OU T AGC Gain Control Temperature Comp. DLL
BAND 1900
Overload Indicator STARTUP ENABLE MODE CDM
PRESCALER
Mode Control
VHF VCC
VHF VEE
Figure 1 Block diagram
OVERLOAD DET
VHF BUF
VHF RES
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
Pin No 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 Pin Name 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
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Preliminary Information
Electrical Characteristics (Mode Control) Description
Standby Mode Start up Mode
SATURN
ENAVLE STARTUP MODE CDMA BAND 1900
0 0 0 0 1 1 X X X X 1 0
Conditions
All circuits powered down except logic inputs For high band IF (210.38MHz) 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
1 1
1 0
For high band IF (210.38MHz) For low band IF (85.38MHz) All circuits operational except for IF output buffer, CDMA input stage selected. All circuits operational except for IF output buffer, FM input stage selected. Note 4 Demodulator and LO generation circuitry powered down. IF output buffer enabled Demodulator and LO generation circuitry powered down. IF output buffer enabled.
FM Mode
1
1
0
0
Alternative FM mode CDMA IF AGC only mode
1 1
1 0
0 1
1 X
FM IF AGC
1
0
0
X
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. 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). 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). 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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