Trf6901 Block Diagram; Hardware Overview; Trf6901 Rf Block Diagram - Texas Instruments TRF6901 User Manual

Hardware Overview

2.1 Hardware Overview
The TRF6901 ISM-band transceiver IC operates from 860 MHz to 930 MHz.
It has low power consumption and an operating voltage of 1.8 V to 3.6 V. It uses
an integer-N synthesizer and supports FSK/OOK operation. Other features
include an on-chip reference oscillator, phase lock loop, brownout detector,
and XTAL software trimming.
The TRF6901 RF evaluation module (EVM) provides a platform for lab
prototype evaluation of the Texas Instruments TRF6901 transceiver IC. The
EVM is used to evaluate the RF performance of the TRF6901. It contains a PC
parallel port interface. The transmitted signal can be viewed on a spectrum
analyzer as either a single output frequency or in FSK mode. Although higher
data rates are achievable with the TRF6901, the TRF6901 EVM is designed
to operate at bit rates up to 32-kbps NRZ, with a deviation of approximately
±50 kHz, at room temperature.

2.2 TRF6901 RF Block Diagram

Figure 2−1 shows the block diagram of the TRF6901 ISM transceiver IC.
Figure 2−1. TRF6901 Block Diagram
LNA_IN1, LNA_IN2
RF
LNA
IN
1, 2
860 MHz to 930 MHz
Band-gap
Brownout
45
DET_OUT
Detector
25
DC_DC_IN
DC-DC
22
Converter
DC_DC_OUT
4
PA_OUT
860 MHz to 930 MHz
typical 9 dBm
2-2
Ceramic
Ceramic
IF Filter
Discriminator
47
44, 43 35
Limiter
Mixer
RSSI
/A-
Counter
/N
32/33 Counter
PA
VCO_TUNE 13 15 CP_OUT
Loop Filter
37 36 39 34
LPF Amplifier
Quad.
Data Slicer
Dem.
8
/Div. CTRL
Serial
6
Interface
/B-
8
5
/L
8
2..254
/K
2..62
PFD
CPs /Ref
2..255
30
33
RX_DATA
41
RSSI_OUT
18
CLOCK
20
DATA
19
STROBE
26
STDBY
21
MODE
27
CLK_OUT
32
TX_DATA
31