HFA3860A Просмотр технического описания (PDF) - Intersil
Номер в каталоге
Компоненты Описание
Список матч
HFA3860A Datasheet PDF : 39 Pages
| |||
HFA3860A
Typical Application Diagram
HFA3724/6
(FILE# 4067)
HFA3860A
(FILE# 4488)
HFA3424 (NOTE)
(FILE# 4131)
HFA3624
UP/DOWN
CONVERTER
(FILE# 4066)
RXI
A/D
DEMOD
DE-
SPREAD
I
RXQ
A/D
÷2
0o/90o M
U
M RSSI
U
802.11
A/D
CCA
MAC-PHY
INTERFACE
X
X
TXI
RFPA
HFA3925
(FILE# 4132)
VCO VCO
DUAL SYNTHESIZER
Q
QUAD IF MODULATOR
SPREAD
TXQ
MOD.
DSSS BASEBAND PROCESSOR
HFA3524 (FILE# 4062)
TYPICAL TRANSCEIVER APPLICATION CIRCUIT USING THE HFA3860A
NOTE: Required for systems targeting 802.11 specifications.
For additional information on the PRISM™ chip set, call
(407) 724-7800 to access Intersil’ AnswerFAX system. When
prompted, key in the four-digit document number (File #) of
the data sheets you wish to receive.
Pin Descriptions
The four-digit file numbers are shown in the Typical
Application Diagram, and correspond to the appropriate
circuit.
NAME
VDDA
(Analog)
VDD
(Digital)
GND
(Analog)
GND
(Digital)
VREFN
VREFP
IIN
QIN
ANTSEL
ANTSEL
RSSI
TX_PE
PIN
10, 18, 20
TYPE I/O
DESCRIPTION
Power DC power supply 2.7V - 3.6V (Not Hardwired Together On Chip).
7, 21, 29, 42 Power DC power supply 2.7 - 3.6V
11, 15, 19 Ground DC power supply 2.7 - 3.6V, ground (Not Hardwired Together On Chip).
6, 22, 31, 41 Ground DC power supply 2.7 - 3.6V, ground.
17
I
“Negative” voltage reference for A/D’s (I and Q) [Relative to VREFP]
16
I
“Positive” voltage reference for A/D’s (I, Q and RSSI)
12
I
Analog input to the internal 3-bit A/D of the In-phase received data.
13
I
Analog input to the internal 3-bit A/D of the Quadrature received data.
26
O
The antenna select signal changes state as the receiver switches from antenna to antenna during the
acquisition process in the antenna diversity mode. This is a complement for ANTSEL (pin 27) for
differential drive of antenna switches.
27
O
The antenna select signal changes state as the receiver switches from antenna to antenna during the
acquisition process in the antenna diversity mode. This is a complement for ANTSEL (pin 26) for
differential drive of antenna switches.
14
I
Receive Signal Strength Indicator Analog input.
2
I
When active, the transmitter is configured to be operational, otherwise the transmitter is in standby mode.
TX_PE is an input from the external Media Access Controller (MAC) or network processor to the HFA3860A.
The rising edge of TX_PE will start the internal transmit state machine and the falling edge will initiate shut
down of the state machine. TX_PE envelopes the transmit data except for the last bit. The transmitter will
continue to run for 3 symbols after TX_PE goes inactive to allow the PA to shut down gracefully.
2-134
Share Link: 