- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄381309 > AS3901 (AUSTRIAMICROSYSTEMS AG) ISM 433/315 MHz FSK/ASK Transmitter PDF資料下載
參數(shù)資料
| 型號： | AS3901 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | ISM 433/315 MHz FSK/ASK Transmitter |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO14 |
| 封裝： | TSSOP-14 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大小： | 618K |
| 代理商： | AS3901 |
ISM 433/315 MHz FSK/ASK Transmitter – Data Sheet
AS3901
Rev. 6, August 2000
Page 4 of 18
1
Functional Description
The AS3901 consists of a reference XTAL oscillator, a single channel RF- synthesizer,
an I/Q based asynchronous continuos phase FSK modulator, a driving amplifier and a
μC interface, including μC clock divider, and a power management circuitry.
AS3901
SSB signal
generation
ANT2
11
VDDRF
433
XTAL1
f =433.920 MHz
VDD
TX
4
STDBY
1
CLK
2
DATA
3
Driving
Amplifier.
Loop-
Filter
Synthesizer
XTAL
Oscillator
VCO
Clock
13.560 MHz
XTAL
GND
5
VDD
6
XTAL2
7
NRES
GNDRF
ANT1
12
14
13
10
9
8
Phase
Detector
Divider
32:1
μC Interface +
Power up/down
Figure 1:
Block diagram of the AS3901.
1.1 RF Synthesizer
The RF synthesizer is a fully integrated single channel device with internal loop filter,
generating the 433 MHz or 315 MHz transmit carrier frequency f
RF
by a fix, 32 times,
multiplication of the reference XTAL frequency f
XTAL
.
1.2 Microprocessor Clock
The microprocesor clock frequency f
CLK
is generated by dividing the XTAL frequency f
XTAL
by 3 or 4, dependent on the 433/315 MHz selection pin to keep the μC clock frequency
f
CLK
almost constant for European and US applications.
1.3 Modulation
The FSK modulator is an I/Q modulator based continuos phase FSK modulator. The
modulating NRZ data may be in the range of 0 up to 32 kbit/s. The FSK frequency
deviation
f is
≈
16 kHz, independent of the data rate. It is also kept almost constant for
both transmit frequency bands by selecting proper frequency deviation multiplication
factors of the XTAL reference frequency by the 433/315 MHz selection pin.
The processing clock of the data source can be different from the AS3901 reference
XTAL or μC clock f
CLK
and no data synchronization of the FSK modulator is required.
相關PDF資料 |
PDF描述 |
|---|---|
| AS3902 | ISM 433 MHz ASK Transmitter |
| AS3930-BTST | Low Frequency Wake-up Receiver; Package Type: TSSOP-16; Temperature Range: -40 - +85 °C; Supply Voltage: 2,40-3,60 |
| AS3930-BQFT | Low Frequency Wake-up Receiver; Package Type: QFN(4x4)-16; Temperature Range: -40 - +85 °C; Supply Voltage: 2,40-3,60 |
| AS3931 | 3D Low Power Wakeup Receiver |
| AS3932-BTST | Programmable 3D LF Receiver; Package Type: TSSOP-16; Temperature Range: -40 - +85 °C; Supply Voltage: 2,40-3,60 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS3902 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:ISM 433 MHz ASK Transmitter |
| AS3909 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:13.56 MHz RFID Reader IC, ISO-14443 A/B |
| AS39091FLF | 制造商:TT Electronics / IRC 功能描述:AS39091FLF |
| AS39091HLF | 制造商:TT Electronics / IRC 功能描述:AS39091HLF |
| AS39091JLF | 制造商:TT Electronics / IRC 功能描述:AS39091JLF |
發(fā)布緊急采購，3分鐘左右您將得到回復。