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參數(shù)資料
| 型號(hào)： | AS3901 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 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(yè)數(shù)： | 9/18頁(yè) |
| 文件大?。?/td> | 618K |
| 代理商： | AS3901 |
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ISM 433/315 MHz FSK/ASK Transmitter – Data Sheet
AS3901
Rev. 6, August 2000
Page 9 of 18
2.3 Transmit Operation
T
AMB
= 23 °C, VDD = 3.0 V, unless specified otherwise.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Note
f
RF, EU
Transmit frequency (Europe) f
XTAL
= 13.560 MHz
433.920
MHz
1)
f
RF, US
Transmit frequency (US)
f
XTAL
= 9.84375 MHz
315.000
MHz
1)
f
offset
Frequency tolerance
After t
TXON
, no XTAL
tolerance.
2
kHz
f
CLK, EU
μC clock frequency (Europe) f
XTAL
= 13.560 MHz
3.390
MHz
f
CLK, US
μC clock frequency (US)
f
XTAL
= 9.84375 MHz
3.28125
MHz
t
TXon
Transmitter turn on time
FSK modulator and
driver amplifier
20
μs
t
PLLon
PLL turn on time
t.b.d.
ms
T
XTon
XTAL oscillator turn on time
5
ms
Note:
1)
XTAL tolerances will slightly change the typical transmit frequency.
2.3.1 ASK Operation
T
AMB
= 23 °C, VDD = 3.0 V, unless specified otherwise.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Note
P
OUT
,H
Available peak output
power
In 2 k
, STDBY = ”L”,
TX/ASK = ”H”
-1.5
0
1.5
dB
m
1) 3)
P
OUT
,L
Leakage peak output
power
In 2 k
, STDBY = ”L”,
TX/ASK = ”L”
-50
dB
m
P
OUT
3rd
Radiated third harmonic
output power
Antenna attenuation>
20 dB
-39
dB
m
2)
P
SP
Spurious power
In distance of f
CLK
or
f
XTAL
from carrier. No
antenna selectivity
assumed.
-45
-25
dB
C
2) 3)
R
ASK
ASK data rate range
For a RF packet duty
cycle
≥
25 %.
0
20
Kb/s
Note:
1)
Output power depends on load impedance, differential output current is typical 0.7 mA
rms
. Maximum differential voltage swing
is typical 4 V
PP
.
Measurement bandwidth (close to EN 300 220-1) see also figure 10.
Actual E.R.P. depends on antenna efficiency
2)
3)
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