th7121 ETC-unknow, th7121 Datasheet - Page 17

• Manufacturer Part Number: th7121
• Description: 300 To 930mhz Fsk/fm/ask Transceiver
• Manufacturer: ETC-unknow

AC System Characteristics of the Receiver Part
all parameters under normal operating conditions, unless otherwise stated; all parameters based on test
circuits for FSK (Fig. 4 to 5), FM and ASK (Fig. 6 to 7), respectively; RF at 868.3 MHz
Notes: 1. desired signal with FSK/FM or ASK modulation, CW blocking signal
AC System Characteristics of the Transmitter Part
all parameters under normal operating conditions, unless otherwise stated;
typical values at T
TE/SDTA=1, RE/SCLK=0, ASK/FSK=1, RPS 15 k , f
3901007121
Rev. 001
Input sensitivity – FSK
Input sensitivity – ASK
Maximum input signal – FSK/FM
at low gain
Maximum input signal – FSK/FM
at high gain
Maximum input signal – ASK
at low gain
Maximum input signal – ASK
at high gain
Image rejection
Blocking immunity
Start-up time – FSK/FM
Start-up time – ASK
Spurious emission
Output power
FSK deviation
Data rate FSK
FM deviation
Modulation frequency FM
Data rate ASK
PLL spurs emission
Harmonic emission
VCO gain
Charge pump current
Start-up time
Parameter
Parameter
a
= 23 °C and V
cc
= 3 V;
P
P
P
P
P
P
T
T
P
P
R
f
R
P
P
K
I
T
Symbol
Symbol
mod
CP
P
P
f
f
min_FSK
min_ASK
max_FSK_1
max_FSK_0
max_ASK_1
max_ASK_0
FSK
ASK
spur
o
spur
harm
VCO
TX
FSK
ASK
FSK
FM
imag
block
CW mode
depends on C
crystal parameter
adjustable with varactor
and V
at all f
at all f
from ”standby” to
“transmit” mode
B
BER
B
BER
BER
V
BER
V
BER
V
BER
V
TE/SDTA=0,
RE/SCLK=1
valid data at output
depends on ASK de-
tector time constant and
start-up mode, valid
data at output
IF
f =
IF
GAIN_LNA
GAIN_LNA
GAIN_LNA
GAIN_LNA
f
block
= 150kHz
= 150kHz
Page 17 of 28
FM
c
c
and nominal P
and power steps
> 2MHz, note 1
Condition
50 kHz (FSK/FM)
c
Condition
3 10
3 10
3 10
3 10
3 10
3 10
= 868.3 MHz, test circuit shown in Fig. 4 to 7
> 1.4 V
< 0.8 V
> 1.4 V
< 0.8 V
-3
-3
-3
-3
-3
-3
x1
, C
x2
and
o
FSK/FM/ASK Transceiver
Min
Min
4
5
-103
-105
TBD
TBD
Typ
Typ
260
-10
-20
10
60
60
35
0
6
50
5
-
6
300 to 930MHz
TH7121
200K * C6
Max
Max
T
-70
-36
-36
100
1
FSK
+
8
1
Data Sheet
Jan. 2002
MHz/V
kbit/s
kbit/s
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
Unit
Unit
kHz
kHz
kHz
ms
ms
ms
dB
dB
µA