Receiver Turn-On Timing
The maximum time tPR required for the receive function to become opera-
tional at turn-on is influenced by two factors. All receiver circuitry will be op-
erational 1 ms after the supply voltage reaches 2.2 Vdc. The BBOUT-
CMPIN coupling-capacitor is then DC stabilized in 4 time constants
(4*tBBC). The total turn-on time to stable receiver operation for a 10 ms
power supply rise time is:
Receiver Wake-Up Timing
The maximum transition time tSR from the sleep mode to the receive mode
is 4*tBBC, where tBBC is the BBOUT-CMPIN coupling-capacitor time con-
stant. When the operating temperature is limited to 60°C, 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.
tPR = 15 ms + 4*tBBC
AGC Timing
The maximum AGC engage time tAGC is 5 µs after the reception
Data Rate (b/s)
1200
CFG1 Bits 3-0
0000
of a -30 dBm RF signal with a 1 µs envelope rise time.
Peak Detector Timing
2400
0001
The Peak Detector attack time constant is set by the value of the capacitor
at the PKDET pin. The attack time tPKA =CPKD/4167, where tPKA is in µs
4800
0010
and CPKD is in pF. The Peak Detector decay time constant
9600
0011
t
PKD = 1000*tPKA.
19200
0100
38400
0101
57600
0110
115200
230400
0111
1000
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
TR8000-08172007
Page 8 of 14
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
