RX5001 RFM, RX5001 Datasheet - Page 7

• Manufacturer Part Number: RX5001
• Description: RF Receiver 2G ASH Receiver 315 MHz 115.2kbps
• Manufacturer: RFM
• Type: Receiverr

Specifications of RX5001

• Package / Case: SM-20L
• Operating Frequency: 315.2 MHz
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Sleep and Wake-Up Timing
The maximum transition time from the receive mode to the power-
down (sleep) mode t
both low (1 µs fall time).
The maximum transition time t
receive mode is 3*t
coupling-capacitor time constant. When the operating temperature
is limited to 60 oC, the time required to switch from sleep to receive
is dramatically less for short sleep times, as less charge leaks
away from the BBOUT- CMPIN coupling capacitor.
AGC Timing
The maximum AGC engage time t
a -30 dBm RF signal with a 1 µs envelope rise time.
The minimum AGC hold-in time is set by the value of the capacitor
at the AGCCAP pin. The hold-in time t
t
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
where t
time constant t
Pulse Generator Timing
In the low data rate mode, the interval t
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
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
R
Receiver Event Timing, 3.0 Vdc, -40 to +85 °C
Turn On to Receive
Sleep to RX
RX to Sleep
AGC Engage
AGE Hold-In
PKDET Attack Time Constant
PKDET Decay Time Constant
PRATE Interval
PWIDTH RFA1
PWIDTH RFA2
PRATE Cycle
PWIDTH High (RFA1 & RFA2)
LPF Group Delay
LPF 3 dB Bandwidth
BBOUT-CMPIN Time Constant
AGH
PR
= 404* t
is in µs and C
PKA
PRI
Event
is in µs and C
+ 10.5, where t
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PKD
AGC
= 1000*t
BBC
RS
PR
, where t
is in pF.
is 10 µs after CNTRL1 and CNTRL0 are
is given by:
PKD
PKA
PRI
Symbol
is in pF. The Peak Detector decay
SR
is in µs, and R
.
t
BBC
t
t
t
t
t
t
t
t
t
f
t
PWH
t
t
t
AGC
AGH
PW1
PW2
PRC
FGD
PKA
PKD
BBC
LPF
PRI
PR
SR
RS
from the sleep mode to the
AGC
is the BBOUT-CMPIN
PRI
is 5 µs after the reception of
AGH
3*t
0.05 to 0.55 µs
0.1 to 1.1 µs
between the falling edge
0.064*C
0.55 to 1 µs
C
C
0.1 to 5 µs
1445/R
1000*t
BBC
1750/f
= C
1.1*t
PKD
AGC
PR
3*t
Time
10 µs
5 µs
PKA
+ 15 ms
BBC
AGC
is in kilohms
/4167
/19.1
PW1
PKA
LPF
LPF
BBO
= C
/19.1, where
PKD
/4167,
range
range
range
range
range
Min/
Max
max
max
max
max
max
min
min
min
min
min
PR
Table 1
1 µs CNTRL0/CNTROL 1 fall times time until receiver is in power-down mode
10 ms supply voltage rise time
1 µs CNTRL0/CNTROL 1 rise
1 µs rise time, -30 dBm signal
f
LPF
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 period t
first RF amplifier to the start of the next ON pulse to the first RF
amplifier is controlled by the PRATE resistor over a range of 0.1 to
1.1 µs using a resistor of 11 K to 220 K. In this case R
by:
R
In the low data rate mode, the PWIDTH pin sets the width of the
ON pulse to the first RF amplifier t
ground (the ON pulse width to the second RF amplifier t
at 1.1 times the pulse width to the first RF amplifier in the low data
rate mode). The ON pulse width t
0.55 and 1 µs with a resistor value in the range of 200 K to 390 K.
The value of R
R
However, when the PWIDTH pin is connected to Vcc through a 1
M resistor, 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
pin. The minimum 3 dB bandwidth f
in kHz, and R
The maximum group delay t
t
CAGC in pF, t
t
t
FGD
C
FGD
BBC
PR
PW
high data rate mode
high data rate mode
Test Conditions
t
low data rate mode
low data rate mode
low data rate mode
in kHz, R
PKD
PKD
= 198* t
= 404* t
is in µs, f
in µs, C
in µs, f
in pF, t
and t
times
LPF
PKA
LPF
PRC
PW1
BBO
PKA
AGH
LPF
in kilohms
LPF
in µs
in kHz
PW
- 8.51, where t
- 18.6, where t
in µs
in pF
in µs
is in kilohms.
in kHz, and R
is given by:
PRC
time until receiver operational
time until receiver operational
RFA1 switches from 35 to 5 dB gain
user selected; longer than t
user selected
slaved to attack time
user selected mode
user selected mode
user selected mode
user selected mode
user selected mode
user selected
user selected
user selected
FGD
PRC
from the start of an ON pulse to the
PW1
LPF
is in µs and R
= 1750/f
is in µs and R
PW1
PW1
LPF
in kilohms.
LPF
can be adjusted between
with a resistor R
= 1445/R
LPF
to ground at the LPFADJ
Notes
PR
= 1.21*R
PW
is in kilohms
is in kilohms
LPF
, where f
PKD
LPF
RX5001 - 4/7/08
PR
PW
PW2
Page 7 of 10
, where
is given
to
LPF
is set
is