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參數(shù)資料
| 型號： | ASCELL3911 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | ER 6C 6#16 SKT RECP LINE |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO14 |
| 封裝： | TSSOP-14 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 104K |
| 代理商： | ASCELL3911 |
ISM 868 MHz, 433 MHz and 315 MHz FSK Transmitter – Preliminary Data Sheet
ASCell3911
Rev. A, February 2000
Page 3 of 13
Austria Mikro Systeme International AG
This document contains information on products under development. Austria Mikro Systeme International AG reserves the right to
change or discontinue this product without notice.
1
Functional Description
The ASCell3911 consists at the RF side of a reference XTAL oscillator, a single channel RF-
synthesizer, an I/Q based direct conversion FSK modulator, a driving amplifier. On the digital
side the pulse interference resistant protocol encoder and a μC interface, including microproc-
essor clock divider and a sophisticated power up/down circuitry are implemented.
PAGND
VDDSTN
f =868.3 MHz
RF-
RF+
VDD
13.5672 MHz
XTAL
GNDSYN
DATA
D_EN
μC CLK
D_CLK
GND
VDD
WAKEUP
RESET/TEST
Driving
Amplifier
Quadrature
Up Converter
Baseband
Filters
Loop-
Filter
Synthesizer
XTAL
Oscillator
VCO
90
°
Clock
Sin /Cos
Generator
Protocol
Encoder
μC
Int
erf
ac
e
+
Po
we
r
up
/d
ow
n
Transmit.
Timing
Control
Register
Divider
64:1/32:1/16:1
Phase
Detector
Figure 1:
Block diagram of the ASCell3911.
1.1
Frequency synthesis is performed by a single channel synthesizer, consisting of a phase de-
tector, a charge pump, a voltage-controlled oscillator (VCO), and a feedback divider. The VCO is
working at 315,000 to 868,300 MHz. The feedback divider divides by 16 (315,00 MHz), 32
(433,920 MHz) or 64 (868,300 MHz). The different ISM bands are selected by different XTAL fre-
quency values F
XOSC
and the CRYSTAL and RANGE control bits. A truth table for the selection
of the different frequencies is given in Table 1.
RF Synthesizer
F
XOSC
/ MHz
Multiplier
CRYSTAL RANGE
F
C
/ MHz
19,6875
16
H
L
315,000
13,5600
32
L
L
433,920
13,5672
64
L
H
868,300
not used
H
H
not used
Table 1:
Quartz and RF output frequencies.
ASCell3911
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASCELL3912 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:ISM 868 MHz, 433 MHz and 315 MHz FSK Transmitter |
| ASCF21U | 制造商:ABRACON 制造商全稱:Abracon Corporation 功能描述:CERAMIC SURFACE-MOUNT 21.4MHz and 45MHz FUNDAMENTAL MONOLITHIC CRYSTAL FILTERS |
| ASCF21U15 | 制造商:ABRACON 制造商全稱:Abracon Corporation 功能描述:CERAMIC SURFACE-MOUNT 21.4MHz and 45MHz FUNDAMENTAL MONOLITHIC CRYSTAL FILTERS |
| ASCF21U20 | 制造商:ABRACON 制造商全稱:Abracon Corporation 功能描述:CERAMIC SURFACE-MOUNT 21.4MHz and 45MHz FUNDAMENTAL MONOLITHIC CRYSTAL FILTERS |
| ASCF21U30 | 制造商:ABRACON 制造商全稱:Abracon Corporation 功能描述:CERAMIC SURFACE-MOUNT 21.4MHz and 45MHz FUNDAMENTAL MONOLITHIC CRYSTAL FILTERS |
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