RTR-6285-0-68MQFN-MT-13

Device description

The RTR6285/RTR6280 device is a highly integrated radio frequency complementary metal oxide semiconductor (RF CMOS) transceiver IC.
The functional block diagram for the RTR6285 IC is shown in Figure 1-1 and the functional block diagram for the RTR6280 IC is shown in Figure 1-2.

The RTR6285/RTR6280 IC supports multi-band, multi-mode phones.

■ Receiver paths:
❒ GSM/EDGE 850
❒ GSM/EDGE 900
❒ GSM/EDGE 1800
❒ GSM/EDGE 1900
❒ Two single-ended UMTS inputs
❒ Two differential UMTS inputs
❒ Three single-ended UMTS diversity inputs (RTR6285 only)
❒ GPS receive (RTR6285 only)
■ Transmitter paths:
❒ Two low-band Tx paths for:
– GSM/EDGE 850
– GSM/EDGE 900
– UMTS 800/850/900
❒ Three high-band Tx paths for:
– GSM/EDGE 1800
– GSM/EDGE 1900
– UMTS 1700/AWS/1800
– UMTS 1900
– UMTS 2100

Numerous secondary functions also are integrated on-chip:
■ LNAs for UMTS Rx operation
■ Quadrate demodulator to support UMTS Rx operation
■ Three fractional-N synthesizers with on-chip VCOs and loop filters:
❒ PLL1 and on-chip VCO support all transmitters of GSM 850/900/1800/1900 and
UMTS low and high bands. It also serves all receivers of GSM
850/900/1800/1900.
❒ PLL2 and on-chip VCO support primary and diversity receivers of UMTS high
and low bands.
❒ PLL3 and on-chip VCO support GPS receiver (RTR6285 only).
■ Transceiver LO generation and distribution circuits:
❒ GSM/EDGE 850/900/1800/1900 Rx
❒ GSM/EDGE 850/900/1800/1900 Tx
❒ UMTS high and low bands primary and diversity Rx
❒ UMTS high and low bands Tx
■ Quadrature modulators to support GSM/GPRS/EDGE polar Tx and
WCDMA/HSDPA Tx operations
■ Integrated power detector
■ Analog support functions
■ Reference signal for the Mobile Station Modem™ (MSM™) device transmit DACs
■ Transmit gain control
■ Bias control
■ Digital control circuits and interfaces
■ Single-line serial bus interface (SSBI)
■ Thermometer for temperature measurement