TH7120 Datasheet, PDF (17/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7120
300 to 930MHz
FSK/FM/ASK Transceiver
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 433.92 MHz
Parameter
Symbol
Condition
Min Typ Max Unit
Input sensitivity – FSK
P_{min_FSK} B_IF = 150kHz
-103
dBm
∆f = ± 50 kHz (FSK/FM)
BER ≤ 3⋅10^-3
Input sensitivity – ASK
P_{min_ASK}
B_IF = 150kHz
BER ≤ 3⋅10^-3
-105
dBm
Maximum input signal – FSK/FM
at low gain
Maximum input signal – FSK/FM
P_{max_FSK_1}
P_{max_FSK_0}
BER ≤ 3⋅10^-3
V_{GAIN_LNA} > 1.4 V
BER ≤ 3⋅10^-3
10
dBm
-10
dBm
at high gain
V_{GAIN_LNA} < 0.8 V
PRELIMINARY ^{Maximum input signal – ASK}
at low gain
Maximum input signal – ASK
at high gain
P_{max_ASK_1}
P_{max_ASK_0}
BER ≤ 3⋅10^-3
V_{GAIN_LNA} > 1.4 V
BER ≤ 3⋅10^-3
V_{GAIN_LNA} < 0.8 V
Image rejection
Blocking immunity
∆P_imag
∆P_block
∆f_block > ±2MHz, note 1
Start-up time – FSK/FM
T_FSK
TE/SDTA=0,
RE/SCLK=1
valid data at output
Start-up time – ASK
T_ASK
depends on ASK de-
tector time constant and
start-up mode, valid
data at output
Spurious emission
P_spur
Notes: 1. desired signal with FSK/FM or ASK modulation, CW blocking signal
-20
dBm
0
dBm
TBD
dB
TBD
dB
1
ms
T_FSK
ms
+
200K * C6
-70 dBm
AC System Characteristics of the Transmitter Part
all parameters under normal operating conditions, unless otherwise stated;
typical values at T_a = 23 °C and V_cc = 3 V;
TE/SDTA=1, RE/SCLK=0, ASK/FSK=1, RPS≥15 kΩ, f_c = 433.92 MHz, test circuit shown in Fig. 4 to 7
Parameter
Symbol
Condition
Min Typ Max Unit
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
P_o
CW mode
4
6
8
dBm
∆f_FSK
depends on C_x1, C_x2 and
±5
±50
±100
kHz
crystal parameter
R_FSK
∆f_FM
f_mod
R_ASK
P_spur
P_harm
K_VCO
I_CP
T_TX
adjustable with varactor
and V_FM
at all f_c and nominal P_o
at all f_c and power steps
from ”standby” to
“transmit” mode
60
kbit/s
±6
kHz
5
kHz
60
kbit/s
-36 dBm
-
-36 dBm
35
MHz/V
260
µA
1
ms
3901007120
Rev. 005
Page 17 of 28
Data Sheet
Jan. 2002