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參數(shù)資料
| 型號： | UAA3515AHL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 900 MHz analog cordless telephone IC |
| 中文描述： | TELECOM, CORDLESS, RF AND BASEBAND CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 X 1.40 MM, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 11/44頁 |
| 文件大小： | 180K |
| 代理商： | UAA3515AHL |
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2001 Dec 12
11
Philips Semiconductors
Product specification
900 MHz analog cordless telephone IC
UAA3515A
7.2.1
D
ATA COMPARATOR
The data comparator is an inverting hysteresis
comparator. An external bandpass filter is connected
between pins DETO and DATI (AC-coupled). The
open-collectoroutputiscurrentlimitedtocontroltheoutput
signal slew rate. An external resistor of 180 k
should be
connected between pin DATO and V
CC
. An external
capacitor in parallel with this resistor will reduce the slew
rate.
7.3
Transmitter
The transmitter architecture is of the direct modulation
type. The transmit VCO can be frequency modulated by
speech or data (see Fig.4). An amplifier sums the
modulating signal with the data TX signal before the VCO.
Frequency control is affected by integrated variable
capacitance diodes. To obtain the correct frequency,
external inductors in series with the bonding wires and
leadframe are required. The power amplifier is capable of
driving a 50
load. The level of the output signal PAO is
programmed with two bits via the serial bus interface.
handbook, full pagewidth
FCA296
UAA3515A
22
TXLOX
23
TXLOY
26
TXO
DUAL PLL
FREQUENCY
SYNTHESIZER
TX
VOLTAGE
REGULATOR
13
TXPD
XTAL
16
PAO
CS
LP
VCC
VBmod
VB
14
TXLF
TX VCO
SUMMING
AMPLIFIER
21
VCC(VTX)
Data TX
19
MODO
18
MODI
Fig.4 Transmitter block diagram.
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