PT8R1002 Datasheet, PDF (4/26 Pages) List of Unclassifed Manufacturers – CMOS Zero-IF Radio Transceiver IC for Bluetooth

Preliminary Data Sheet
PT8R1002 CMOS Zero-IF
Radio Transceiver IC for Bluetooth
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Note : 1. The pin indicates the directional mode of BlueRF™ RXMODE2.
Pin Name
I/O
Type
BlueRF™ RXMODE2
BlueRF RXMODE2
MDSEL
DI
select data
LOW
Bidirectional interface
Unidirectional interface
HIGH
TXACTIVE
DI
active high
Don’ t use
BTXEN
RXACTIVE
DI
active high
Don’ t use
BRXEN
TXDATA_EN
DI
active high
Don’ t use
BPAEN
TXDATA
DB
serial data
BTXD
Transmit (DI), Receiver (DO)
BTXD (DI)
RXDATA
DO
serial data
Don’ t use
BRXD
SYNCDETECT DI
active high
BPKTCTL
BPKTCTL
DATACLK
DO
clock
BRCLK
BRCLK
RESET
DI
active low
BnPWR
BnPWR
TCK
DI
SPI clock
BDCLK
BDCLK
TMS
DI
control data
BnDEN
BnDEN
TDI
DI
serial data
Don’ t use
BMISO
TDO
DB
serial data
BDDATA
BMOSI (DO)
Write (DI), Read (DO)
2. The default supporting reference clock is 13MHz. To use 16MHz as reference clock, it is necessary to program the RF register
through serial interface at the initial stage. The register description should be referred for the change.
3. These pins should be open in normal operation.
Functional Description
RF receiver
Bluetooth is an open specification for short-range data com-
munications. It operates in the globally available 2.4 GHz to
2.5 GHz ISM free band and uses fast frequency hopping (1600
hop/s) over 79 available channels (2.402 to 2.480 GHz) with a
maximum data rate of 1 Mbit/s.
The PT8R1002 is intended for the use in 2.4GHz ISM fre-
quency band wireless systems, especially, Bluetooth. The trans-
ceiver consists of a fully integrated 2.4 GHz radio transceiver,
frequency-hopping synthesizer, and analog-to-digital and digi-
tal-to-analog converters for the baseband interface. As illus-
trated in Figure 1, the radio module requires only an external
antenna, antenna switch and crystal to complete the analog
front end.
The receiver front-end converts the incoming RF signal in
2.4GHz ISM frequency band to a digitized signal for digital
signal processing. The receiver is composed of a LNA, a com-
plex RF-to-Baseband down conversion Mixer, an AGC/com-
plex filter, a dual ADC for the I/Q signal paths, and phase
locked loop synthesized local oscillator. The first stage is a
single-ended LNA with external matching circuit. The LNA is
followed by quadrature down conversion mixers. The down
conversion mixer employs PTI’ s proprietary technologies to
minimize RF coupling and DC offsets.
Channel selection filter and AGC
With the use of direct down-conversion scheme, the complex
baseband filters carry out excellent channel selection and im-
age-free operations. As a result, the receiver exceeds the
Bluetooth 1.1 requirements for adjacent channel & image re-
jection and provides superior performances in the presence of
ISM-band RF interferers.
PT0124(12/04)
4
Ver:2