AMIS-52150 Datasheet, PDF (11/21 Pages) AMI SEMICONDUCTOR – Low-Power Transceiver with Clock and Data Recovery

AMIS−52150
Table 17. TRANSMITTER CONTROL REGISTERS
TX/RX Definition Control Registers
Register (HEX)
Name
Bits
States
0x02
TX Power
All
0x04
TX XTAL Trim
All
0x0c
TX Enable
4
0
Transmitter is Off
1
Transmitter is On
0x0f
Data Filter
4, 5, 6
000
1.1 kHz
001
2.3 kHz
010
5.2 kHz
011
10.4 kHz
100
1.18 kHz
101
2.57 kHz
110
7.0 kHz
111
20.45 kHz
0x1e
TX/RX Invert
5
0
Normal Levels
1
Inverted
Comments
Table 18. OUTPUT IMPEDANCE CHARACTERISTICS
Specification
Output Impedance
Settings
Conditions
Resistance
Capacitance
Output Power
RFPWR 0x00
RFPWR 0xff
Harmonics
Ext. Circuit
Frequency Range
Target
Quick Start
Full Range
Modulation
On/Off Ratio
TX Output
Min
Typ
Max
−
22
−
−
3
−
−
−26
−
11
12
13
−
−35
−
402
−
405
350
−
448
300
−
768
ASK/OOK
−
70
−
Unit
W
pF
dBm
dBm
MHz
dBm
Figure 7. Transmit Waveforms
Sniff Mode
Applications based on low power consumption require
Sniff Mode operation of the AMIS−52150. This mode turns
off the receiver and the crystal oscillator during
programmable, regular time intervals. At the end of each
time interval, the receiver wakes up and sniffs for the
incoming RF energy. If energy is detected, the receiver
transitions to the full receive mode and starts data recovery
from the RF carrier. If energy is not detected, the receiver
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