th71221 Melexis Company, th71221 Datasheet - Page 22

• Manufacturer Part Number: th71221
• Description: Transceiver - 27 To 930mhz, Fsk/fm/ask, Multi-channel 32l Qfn 5x5 Quad
• Manufacturer: Melexis Company

5.1.2
39010 071221
Rev. 006
LOCKMODE
TXPOWER
LNAGAIN
OPMODE
MODSEL
IDLESEL
not used
DTAPOL
PACTRL
CPCUR
Name
RR
A – word
[11:10]
[15:14]
[9:0]
Bits
[12]
[13]
[16]
[17]
[18]
[19]
[20]
[21]
4d .. 1023d
00
01
10
11
00
01
10
11
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Standby mode
Receive mode
Transmit mode
Idle mode
low LNA gain
high LNA gain
This selection is valid if bit LNACTR (bit 21 in C-word) is set to internal LNA gain control.
P1
P2
P3
P4
PA is switched on if the PLL locks
PA is always on in TX mode
before lock only
Locked state condition will be ascertained only one time afterwards the LD signal remains in
high state.
before and after lock
locked state will be observed permanently
1300 µA
ASK
FSK
This selection is valid if bit MODCTRL (bit 21 in D-word) is set to internal modulation
control.
normal
‘0’ for space at ASK or f
inverse
‘1’ for space at ASK or f
only RO active
whole PLL active
260 µA
Reference divider ratio in RX operation mode
Set the PLL locked state observation mode
Page 22 of 44
min
min
Charge Pump output current
set to ‘1’ for correct function
Active blocks in IDLE mode
at FSK, ‘1’ for mark at ASK or f
at FSK, ‘0’ for mark at ASK or f
Set the PA-on condition
Output power steps
Input data polarity
Modulation mode
Operation mode
Description
LNA gain
FSK/FM/ASK Transceiver
max
max
at FSK
at FSK
TH71221
27 to 930MHz
Data Sheet
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June/08