ATA5749_09 ATMEL [ATMEL Corporation], ATA5749_09 Datasheet - Page 20

• Manufacturer Part Number: ATA5749_09
• Description: Fractional-N PLL Transmitter IC
• Manufacturer: ATMEL [ATMEL Corporation]

10. Electrical Characteristics (Continued)
V
f
C
20
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
CLK
3.10
3.11
S
0
No. Parameters
3.5
3.6
3.7
3.8
3.9
4.1
4.2
4.3
4.4
4.5
4
= 1.9V to 3.6V T
= 1.5 pF, C
= 1.625 MHz unless otherwise specified. If crystal parameters are important values correspond to a crystal with C
Locking time of the PLL
DC voltage after XTAL
amplitude stable
Negative real part of
XTO impedance at
begin of start-up
External Capacitors
C4, C5
Pin Capacitance
XTO1 and XTO2
Crystal oscillator
start-up time
Maximum shunt
capacitance C
Oscillator frequency
XTO
Fractional-N-PLL
Frequency range of RF
frequency
PLL loop bandwidth
In Loop phase noise
PLL
Out of Loop Phase
noise (VCO)
(Pin Number) in brackets mean they are measured matched to 50 according to
and optimum load impedances according to
ATA5749 [Preliminary]
LOAD
= 9 pF and R
amb
0
= –40°C to +125°C, CLK_ON = “High”; DIV_CNTRL = “Low”, CLOAD_CLK = 10 pF. f
of XTAL
M
Test Conditions
V(XTO2) – V(XTO1)
XTO running
This value is important for
crystal oscillator start-up
behavior
C
8 pF < C
F
11.0 MHz < F
Recommended values for proper
start-up and low current
consumption
Quality NPO
C
(C
(C
C
The PCB Capacitance of about
1 pF has to be added
Time between EN = “High” and
XTO_RDY = “High”
C
C
R
11.0 MHz < F
Required for stable operation of
XTO, C
433.92 MHz and 315 MHz other
frequencies
S434_N315 = “LOW”
S434_N315 = “HIGH”
Time between
XTO_RDY= “High” and Register
programmed till PLL is locked
f
other f
Unity gain loop frequency of
synthesizer
25 kHz distance to carrier
At 1 MHz
At 36 MHz
XTO
XTAL
0
LOAD
Load_nom
0
0
M
5
4
< 2.0 pF, 4 fF < C
< 2.0 pF, 2 fF < C
170 . Typical values are given at V
< 2.0 pF,
< 170
+ C
+ C
= 13.0000 MHz
= 13.000 MHz
= (C
XTO
Load
XTO2
5
LOAD
+ C
= 9 pF (inc. PCB)
4
> 7. 5 pF
) /
+ C
XTO1
< 10 pF
XTAL
XTAL
XTO1
+ C
< 14.8 MHz
< 14.8 MHz
)
M
M
XTO2
Table 4-1
< 15 fF
< 15 fF
)
and
6, 7, 1
6, 7
6, 7
6, 7
6, 7
6, 7
6, 7
1, 5
Pin
Table 4-2 on page 9
5
5
5
5
S
= 3.0V and T
R
XTO12_START
Symbol
V
f
C
Loop_PLL
C
C
L
DC_XTO
L
L
f
0_MAX
T
at36M
T
XTO
f
C
C
XTO1
XTO2
at1M
RF
PLL
XTO
PLL
4
5
amb
= 25°C
–1500
–1300
–15%
–15%
Min.
–5%
11.0
Figure 4-2 on page 8
300
367
140
13.0000
–2200
–122
Typ.
0.20
0.32
280
–83
–91
1.5
40
15
2
2
XTO
+15%
+15%
1280/
98.46
Max.
–115
+5%
f
14.8
368
450
380
–76
–84
0.3
0.5
3.0
XTO
= 13.0000 MHz,
with component values
M
dBc/Hz
dBc/Hz
dBc/Hz
MHz
MHz
Unit
= 4.0 fF,
kHz
mV
ms
pF
pF
pF
µs
9128D–RKE–01/09
Type*
C
B
D
C
B
D
C
A
B
B
A
A
C