Samsung SCH-3500 series Service Manual page 24

IFT3000 FEATURES
- Dual-mode operation for CDMA and AMPS
- 8-bit DACs convert digital baseband to analog
baseband
- CDMA and FM signal paths include low-pass
filrers for I and Q output waveform smoothing
- IF mixer up-converts analog baseband to IF
- Controls Tx power level with AGC amplfier
having 84 dB dynamic range
- Programmable Tx PLL for generating Tx IF
frequency
- VCO for generation of transmit LO mixing signal
- 8-bit general-purpose ADC with 3-input analog
multiplexer
- Operational modes compatible with MSM2300 and
MSM3000
- Three-line Serial Bus Interface (SBI) for control of
the IFT3000 via the MSM3000
- 48-lead TQFP packaging for dense mechanical
assemblies
SAMSUNG Proprietary-Contents may change without notice
IFR3000 FEATURES
- Dual-mode operation for CDMA and AMPS
- Rx power level with 90 dB dynamic analog
baseband
- IF mixer down-converts Rx IF to quadrature
analog baseband
- CDMA and FM signal paths include low-pass
filrers for accurate selection of I and Q baseband
components
- 4-bit ADCs convert CDMA I and Q analog
baseband signals to digital baseband data
- 8-bit ADCs convert FM I and Q analog baseband
signals to digital baseband data
- RX Slotting operation for very low power
consumption in CDMA and FM signal paths
- Clock generators for CDMA and AMPS operation
- VCO for generation of receive LO mixing signal
- I and Q offset control inputs drive baseband DC
offsets to zero in CDMA and FM signal paths
- Operational modes compatible with MSM2300 and
MSM3000
- Three-line Serial Bus Interface for initializing and
control of the IFR3000 from the MSM3000
- 48-lead TQFP (JEDEC Pub 95 MS-026 BBC)
packaging for dense circuit boards
6-6
Circuit Description