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參數(shù)資料
| 型號： | TX4915 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TX4915 VHF/UHF TRANSMITTER |
| 中文描述： | TX4915甚高頻/超高頻發(fā)射器 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 234K |
| 代理商： | TX4915 |
TX4915
the wireless IC company
Page 4
March 2000
Electrical Characteristics
(V
DD1, DD2
= 2.2 to 5 V, V
SS, SS1, SS2
= 0 V, T
A
= –40 to +85 °C unless otherwise noted)
Parameter
Symbol
Condition
TX4915 Capability(Simulated)
Unit
Value
min.
typ.
max.
Power supply
Supply Voltage
V
CC1,
V
CC2
2.2
3
5
V
Total dc Current (normal operation)
I
DC
TXEN=high , 50
%
Duty Cycle
10kHz data applied to the MODIN
input.R
MODIN
(R3)=3k
mA
Total dc Current (stand-by mode)
I
standby
TXEN = low
1
μ
A
Overall
Frequency Range
100
960
MHz
Modulation
AM/ASK
Modulation frequency
MHz
Incidental FM
kHz
P-P
Output Power
50
load
dBm
ON/OFF Ratio
dB
PLL and Prescaler
Prescaler Divie Ratio
64/128
VCO gain, K
VCO
Frequency and board layout depen-
dent
20
MHz/V
PLL Phase Noise
10KHz Offset, 50kHz loop band-
width
dBc/Hz
100KHz Offset, 50kHz loop band-
width
dBc/Hz
Harmonics
with output tuning
dBc
Reference Frequency
17
MHz
crystal Frequency Spurs
50KHz PLL loop bandwidth
MHz
Max crystal Rs
For a typ. 1ms turn-on time
Max crystal Motional Inductance
For a typ. 1ms turn-on time
mH
Charge pump current
I
CP
K
PD
=100uA/2
Π
100
μ
A
Power Down Control
Power “ON”
V
TXEN
Vcc-0.3V
V
Power “OFF”
V
TXEN
0.3
V
Turn On Time
1
2
ms
Turn Off Time
1
2
ms
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