IFRIFT3000 Просмотр технического описания (PDF) - QUALCOMM Incorporated
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IFRIFT3000 Datasheet PDF : 4 Pages
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QUALCOMM CDMA TECHNOLOGIES
HTTP://WWW.CDMATECH.COM
E N A B L I N G T H E F U T U R E O F C O M M U N I C A T I O N S TM
2
IFR3000™/IFT3000™ Rx IF/BASEBAND PROCESSORS
TCXO/N
Q_OFFSET I_OFFSET
DIV N
TCXO
CHIPx8
CDMA_IF
AGC
CDMA_IF/
VCONTROL
FM_IF
FM_IF/
* SBCK_SLEEP/
* SBST_IDLE/
* SBDT_FM/
SBI_EN
SWITCH
AGC
Serial Bus Interface
and
Mode Control Logic
QI
DIV 2
RX VCO
CDMA
LPF
CDMA
LPF
FM
LPF
FM
LPF
CDMA 4
ADC
2
CDMA
ADC
FM
ADC
FM
ADC
* Dual-function pins
RXVCO_T1
RXVCO_T2
RXVCO_OUT
CHIPx8
RXQD[3:0]
RXID[3:2]
FM_RX_QDATA_RXID1
FM_RX_CLK
FM_RX_STB
FM_RX_IDATA_RXID0
IFR3000 Functional Block Diagram
IFR3000
The circuit blocks within the IFR3000 include
the Rx AGC amplifier with 90 dB dynamic range,
IF mixer and CDMA/FM lowpass filters for
down-converting IF to analog baseband, and
analog-to-digital converters (ADC) for converting
to digital baseband. The IFR3000 includes clock
generators that drive the telephone’s digital processor and a
voltage-controlled oscillator (VCO) which generates the Rx mixer
local oscillator (LO) signal.
IFR3000 Device Features
• Supports IS-98 (CDMA) and IS-19 (AMPS) standards for
dual-mode operation
• 2.7 to 3.15 V supply voltage
• Low current: 26 / 21 mA in CDMA Rx / FM Rx Modes
• Rx power control through 90 dB dynamic range AGC amplifier
• IF mixer for downconverting IF to analog baseband
• Low-pass filtering for CDMA and FM I- and Q-component
baseband signal demodulation
• 4-bit ADCs convert CDMA I and Q analog baseband components
to digital baseband
• 8-bit ADCs convert FM I and Q analog baseband to digital baseband
• Clock generators for CDMA / AMPS operation
• VCO for generation of Rx LO mixing signal
• I- and Q-channel DC offset control inputs drive baseband DC
voltage offset to zero in CDMA and FM signal paths
• Operational Mode compatibility with the MSM2300™, MSM3000®
and MSM3100™ devices
• Enhanced features with MSM3000 device through three-line serial
bus interface (SBI):
– Slotted FM Mode
– Selective power-down
– Mode selection
• 48-lead LQFP and 48-pin BCC packaging options for dense
circuit assemblies
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