User guide

10
4983A–IND–02/07
ATA8403
Output power variation for the full
temperature range
T
amb
= 25°C,
V
S
= 3.0V
V
S
= 2.0V
∆P
Ref
∆P
Ref
–1.5
–4.0
dB
dB
Output power variation for the full
temperature range
T
amb
= 25°C,
V
S
= 3.0V
V
S
= 2.0V,
P
Out
= P
Ref
+ ∆P
Ref
∆P
Ref
∆P
Ref
–2.0
–4.5
dB
dB
Achievable output-power range Selectable by load impedance P
Out_typ
–3 +5.5 dBm
Spurious emission
f
CLK
= f
0
/128
Load capacitance at pin CLK = 10 pF
f
O
±1 × f
CLK
f
O
±4 × f
CLK
Other spurious are lower
–52
–52
dBc
dBc
Oscillator frequency XTO
(= phase comparator frequency)
f
XTO
= f
0
/32
f
XTAL
= resonant frequency of the XTAL,
C
M
≤ 10 fF, load capacitance selected
accordingly
T
amb
= 25°C
f
XTO
f
XTAL
ppm
PLL loop bandwidth 250 kHz
Phase noise of phase comparator
Referred to f
PC
= f
XT0,
25 kHz distance to carrier
–116 –110 dBc/Hz
In-loop phase noise PLL 25 kHz distance to carrier –80 –74 dBc/Hz
Phase noise VCO
At 1 MHz
At 36 MHz
–89
–120
–86
–117
dBc/Hz
dBc/Hz
Frequency range of VCO f
VCO
868 928 MHz
Clock output frequency (CMOS
microcontroller compatible)
f
0
/256 MHz
Voltage swing at pin CLK C
Load
≤ 10 pF
V
0h
V
0l
V
S
× 0.8
V
S
× 0.2
V
V
Series resonance R of the crystal Rs 110 Ω
Capacitive load at pin XT0 7pF
FSK modulation frequency rate Duty cycle of the modulation signal = 50% 0 32 kHz
ASK modulation frequency rate Duty cycle of the modulation signal = 50% 0 50 kHz
ENABLE input
Low level input voltage
High level input voltage
Input current high
V
Il
V
Ih
I
In
1.7
0.25
20
V
V
µA
PA_ENABLE input
Low level input voltage
High level input voltage
Input current high
V
Il
V
Ih
I
In
1.7
0.25
V
S
(1)
5
V
V
µA
7. Electrical Characteristics (Continued)
V
S
= 2.0V to 4.0V, T
amb
= 25°C unless otherwise specified.
Typical values are given at V
S
= 3.0V and T
amb
= 25°C. All parameters are referred to GND (pin 7).
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Note: 1. If V
S
is higher than 3.6V, the maximum voltage will be reduced to 3.6V.