TH72005_12 Datasheet, PDF (10/20 Pages) Melexis Microelectronic Systems – FSK/ASK Transmitter

4.5 AC Characteristics
TH72005
315MHz
FSK/ASK Transmitter
all parameters under normal operating conditions, unless otherwise stated;
typical values at T_A = 23 °C and V_CC = 3 V; test circuit shown in Fig. 18, f_c = 315 MHz
Parameter
Symbol
Condition
Min
Typ
CW Spectrum Characteristics
Output power in step 0
(Isolation in off-state)
P_off ENTX=1
Output power in step 1
P₁ ENTX=1
-13
-12
Output power in step 2
P₂ ENTX=1
-2.5
-3
Output power in step 3
P₃ ENTX=1
2.5
3
Output power in step 4
P₄ ENTX=1
5
9
Phase noise
L(f_m) @ 200kHz offset
-88
Spurious emissions according
to EN 300 220-1 (2000.09)
table 13
P_spur
47MHz< f <74MHz
87.5MHz< f <118MHz
174MHz< f <230MHz
470MHz< f <862MHz
B=100kHz
f < 1GHz, B=100kHz
f > 1GHz, B=1MHz
Start-up Parameters
Start-up time
t_on from standby to
1.2
transmit mode
Frequency Stability
Frequency stability vs. supply
voltage
df_VCC
Frequency stability vs.
temperature
df_TA crystal at constant
temperature
1) output matching network tuned for 5V supply
Max
Unit
-70
dBm
-9.5 ¹⁾
-0.5 ¹⁾
5 ¹⁾
11 ¹⁾
-83
-54
dBm
dBm
dBm
dBm
dBc/Hz
dBm
-36
dBm
-30
dBm
1.5
ms
±3
ppm
±10
ppm
4.6 Output Power Steps
Power step
0
1
RPS / kΩ
<3
22
2
3
4
56
120
not connected
3901072005
Rev. 011
Page 10 of 20
Data Sheet
Jul/12