th7122 Melexis Company, th7122 Datasheet - Page 30

• Manufacturer Part Number: th7122
• Description: Transceiver - 27 To 930mhz, Fsk/fm/ask, Multi-channel Lqfp32
• Manufacturer: Melexis Company

6.6
all parameters under normal operating conditions, unless otherwise stated;
typical values at T
all parameters based on test circuits for FSK (Fig. 14 to 15) and ASK (Fig. 16 to 17), respectively;
6.7
6.8
39010 07122
Rev. 008
Output power
Output power
Output power
Output power
FSK deviation
FM deviation
Modulation frequency FM
PLL reference spurious emission
Harmonic emission
Start-up time
SDTA to SCLK set up time
SCLK to SDTA hold time
SCLK pulse width low
SCLK pulse width high
SCLK to SDEN set up time
SDEN pulse width
SDEN to SCLK hold time
Crystal frequency
Load capacitance
Static capacitance
Equivalent series resistance
Spurious response
AC Characteristics of the Transmitter Part
Serial Control Interface
Crystal Parameters
Parameter
Parameter
Parameter
a
f
f
f
f
f
f
f
f
RF
RF
RF
RF
RF
RF
RF
RF
= 23 °C and V
= 433.92MHz
= 868.3MHz
= 433.92MHz
= 868.3MHz
= 433.92MHz
= 868.3MHz
= 433.92MHz
= 868.3MHz
CC
t
t
t
t
t
f
t
t
C
C
R
a
= 3 V;
P1
P2
P3
P4
Δf
Δf
f
P
P
t
CS
CH
CWL
CWH
ES
EW
EH
crystal
Symbol
Symbol
mod
on_TX
Symbol
spur
load
0
1
spur_PLL
harm
FSK
FM
fundamental mode, AT
only required for FSK
mode = transmit,
RPS = see para. 7.3
TXPOWER = 00
mode = transmit,
RPS = see para. 7.3
TXPOWER = 01
mode = transmit,
RPS = see para. 7.3
TXPOWER = 10
mode = transmit,
RPS = see para. 7.3
TXPOWER = 11
depends on C
and crystal parameters
please refer to the FM
circuit in the cookbook
From standby to
transmit mode
Page 30 of 44
Condition
Condition
Condition
x1
, C
x2
FSK/FM/ASK Transceiver
±2.5
Min
Min
Min
150
100
100
100
100
100
50
10
3
Typ
±25
-10
10
±6
-7
-2
1
6
3
9
1
Max
Max
180
27 to 930MHz
-10
12
15
TH7122
5
Max
±80
-40
-36
1.5
10
Data Sheet
MHz
Unit
Unit
June/07
pF
pF
dB
ns
ns
ns
ns
ns
ns
ns
Ω
dBm
dBm
dBm
dBm
dBm
dBm
Unit
kHz
kHz
kHz
ms