參數(shù)資料
型號： RX5005H
廠商： RF Monolithics, Inc.
英文描述： Designed for Short-Range Wireless Control and Data Communications
中文描述： 專為短距離無線控制和數(shù)據(jù)通信
文件頁數(shù)： 7/10頁
文件大?。?/td> 79K
代理商： RX5005H
RF Monolithics, Inc.
RFM Europe
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com Page 7 of 10
http://www.rfm.com
RX5005H-100405
Peak Detector Timing
The Peak Detector attack time constant is set by the value of the capacitor
at the PKDET pin. The attack time t
PKA
= C
PKD
/4167, where
t
PKA
is in μs and C
PKD
is in pF. The Peak Detector decay time
constant t
PKD
= 1000*t
PKA
.
Pulse Generator Timing
In the low data rate mode, the interval t
PRI
between the falling edge of an
ON pulse to the first RF amplifier and the rising edge of the next ON pulse
to the first RF amplifier is set by a resistor R
PR
between the PRATE pin and
ground. The interval can be adjusted between 0.1 and 5 μs with a resistor
in the range of 51 K to 2000 K. The value of the R
PR
is given by:
R
PR
= 404* t
PRI
+ 10.5, where t
PRI
is in μs, and R
PR
is in kilohms
In the high data rate mode (selected at the PWIDTH pin) the receiver RF
amplifiers operate at a nominal 50%-50% duty cycle. In this case, the peri-
od t
PRC
from the start of an ON pulse to the first RF amplifier to the start of
the next ON pulse to the first RF amplifier is controlled by the PRATE re-
sistor over a range of 0.1 to 1.1 μs using a resistor of 11 K to 220 K. In this
case R
PR
is given by:
R
PR
= 198* t
PRC
- 8.51, where t
PRC
is in μs and R
PR
is in kilohms
In the low data rate mode, the PWIDTH pin sets the width of the ON pulse
to the first RF amplifier t
PW1
with a resistor R
PW
to ground (the ON pulse
width to the second RF amplifier t
PW2
is set at 1.1 times the pulse width to
the first RF amplifier in the low data rate mode). The ON pulse width t
PW1
can be adjusted between 0.55 and 1 μs with a resistor value in the range
of 200 K to 390 K. The value of R
PW
is given by:
R
PW
= 404* t
PW1
- 18.6, where t
PW1
is in μs and R
PW
is in kilohms
However, when the PWIDTH pin is connected to Vcc through a 1 M resis-
tor, the RF amplifiers operate at a nominal 50%-50% duty cycle, facilitating
high data rate operation. In this case, the RF amplifiers are controlled by
the PRATE resistor as described above.
LPF Group Delay
The low-pass filter group delay is a function of the filter 3 dB bandwidth,
which is set by a resistor R
LPF
to ground at the LPFADJ pin. The minimum
3 dB bandwidth f
LPF
= 1445/R
LPF
, where f
LPF
is in kHz, and R
LPF
is in kilo-
hms.
The maximum group delay t
FGD
= 1750/f
LPF
= 1.21*R
LPF
, where t
FGD
is in
μs, f
LPF
in kHz, and R
LPF
in kilohms.
Receiver Event Timing, 3.0 Vdc, -40 to +85 °C
Event
Symbol
Time
Min/Max
Test Conditions
Notes
Turn On to Receive
t
PR
3*t
BBC
+ 15 ms
max
10 ms supply voltage rise time
time until receiver operational
Sleep to RX
t
SR
3*t
BBC
max
1 μs CNTRL0/CNTROL 1 rise times
time until receiver operational
RX to Sleep
t
RS
10 μs
max
1 μs CNTRL0/CNTROL 1 fall times
time until receiver is in power-down mode
AGC Engage
t
AGC
5 μs
max
1 μs rise time, -30 dBm signal
RFA1 switches from 35 to 5 dB gain
AGE Hold-In
t
AGH
C
AGC
/19.1
min
CAGC in pF, t
AGH
in μs
user selected; longer than t
PKD
PKDET Attack Time Constant
t
PKA
C
PKD
/4167
min
C
PKD
in pF, t
PKA
in μs
user selected
PKDET Decay Time Constant
t
PKD
1000*t
PKA
min
t
PKD
and t
PKA
in μs
slaved to attack time
PRATE Interval
t
PRI
0.1 to 5 μs
range
low data rate mode
user selected mode
PWIDTH RFA1
t
PW1
0.55 to 1 μs
range
low data rate mode
user selected mode
PWIDTH RFA2
t
PW2
1.1*t
PW1
range
low data rate mode
user selected mode
PRATE Cycle
t
PRC
0.1 to 1.1 μs
range
high data rate mode
user selected mode
PWIDTH High (RFA1 & RFA2)
t
PWH
0.05 to 0.55 μs
range
high data rate mode
user selected mode
LPF Group Delay
t
FGD
1750/f
LPF
max
t
FGD
in μs, f
LPF
in kHz
user selected
LPF 3 dB Bandwidth
f
LPF
1445/R
LPF
min
f
LPF
in kHz, R
LPF
in kilohms
user selected
BBOUT-CMPIN Time Constant
t
BBC
0.064*C
BBO
min
t
BBC
in μs, C
BBO
in pF
user selected
Table 1
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