TH71221 Datasheet, PDF (30/44 Pages) Melexis Microelectronic Systems – 27 to 930MHz FSK/FM/ASK Transceiver

TH71221
27 to 930MHz
FSK/FM/ASK Transceiver
6.6 AC 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;
all parameters based on test circuits for FSK (Fig. 14 to 15) and ASK (Fig. 16 to 17), respectively;
Parameter
Symbol
Condition
Min Typ Max
Output power
f_RF= 433.92MHz
P1
mode = transmit,
RPS = see para. 7.3
-7
f_RF= 868.3MHz
TXPOWER = 00
-10
Output power
f_RF= 433.92MHz
P2
mode = transmit,
RPS = see para. 7.3
1
f_RF= 868.3MHz
TXPOWER = 01
-2
Output power
f_RF= 433.92MHz
P3
mode = transmit,
RPS = see para. 7.3
6
f_RF= 868.3MHz
TXPOWER = 10
3
Output power
f_RF= 433.92MHz
P4
mode = transmit,
RPS = see para. 7.3
10
f_RF= 868.3MHz
TXPOWER = 11
9
FSK deviation
Δf_FSK
depends on C_x1, C_x2
and crystal parameters
±2.5
±25
±80
FM deviation
Δf_FM
please refer to the FM
circuit in the cookbook
±6
Modulation frequency FM
PLL reference spurious emission
Harmonic emission
f_mod
P_{spur_PLL}
P_harm
Start-up time
t_{on_TX}
From standby to
transmit mode
10
-40
-36
1
1.5
Unit
dBm
dBm
dBm
dBm
kHz
kHz
kHz
dBm
dBm
ms
6.7 Serial Control Interface
Parameter
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
Symbol
t_CS
t_CH
t_CWL
t_CWH
t_ES
t_EW
t_EH
Condition
Min
Max
Unit
150
ns
50
ns
100
ns
100
ns
100
ns
100
ns
100
ns
6.8 Crystal Parameters
Parameter
Crystal frequency
Load capacitance
Static capacitance
Equivalent series resistance
Spurious response
Symbol
Condition
Min
f_crystal
fundamental mode, AT
3
C_load
10
C₀
R₁
a_spur
only required for FSK
Max
12
15
5
180
-10
Unit
MHz
pF
pF
Ω
dB
39010 071221
Rev. 005
Page 30 of 44
Data Sheet
June/07