Rainbow Electronics ATA5812 - Manual (Page 71)

71
ATA5811/ATA5812 [Preliminary]
4689B–RKE–04/04
4.7
Amplitude XTAL after
start-up
C
m
= 5 fF, C
0
= 1.8 pF
R
m
=
15
Ω
V(XTAL1, XTAL2)
peak-to-peak value
24, 25 V
PPXTAL
700 mVpp C
V(XTAL1)
peak-to-peak value
24, 25 V
PPXTAL
350 mVpp C
4.8
Maximum series
resistance R
m
of XTAL at
start-up
C
0
≤
2.2 pF, start-up may
take longer under these
conditions 24, 25 Z
XTAL12_START
-1,500 -2,000
Ω
B
4.9
Maximum series
resistance R
m
of XTAL
after start-up
C
0
≤
2.2 pF
C
m
= 4.0 fF to 7.0 fF
R
m
≤
120
Ω
24, 25 R
m_max
15 120
Ω
B
4.10
Nominal XTAL load
resonant frequency
FREQ = 3,928
f
RF
= 868.3 MHz
f
RF
= 433.92 MHz
f
RF
= 315 MHz
24, 25 f
XTAL
13.41191
13.25311
12.73193
MHz
MHz D
4.11 External CLK frequency
FREQ = 3,928 30 f
CLK
MHz D
f
RF
= 868.3 MHz
CLK division ratio = 3
CLK has nominal 50%
duty cycle
30 f
CLK
4.471 MHz D
f
RF
= 433.92 MHz
CLK division ratio = 3
CLK has nominal 50%
duty cycle
30 f
CLK
4.41
8
MHz D
f
RF
= 315 MHz
CLK division ratio = 3
CLK has nominal 50%
duty cycle
30 f
CLK
4.244 MHz D
4.12 DC voltage after start-up
V
DC
(XTAL1, XTAL2)
XTO running
(Idle mode, RX mode
and TX mode)
24, 25 V
DCXTO
-150 -30 mV
Electrical Characteristics: General (Continued)
All parameters refer to GND and are valid for T
amb
= -40°C to +105°C, V
VS1
= V
VS2
= 2.4 V to 3.6 V (1-battery application),
V
VS2
= 4.4 V to 6.6 V (2-battery application) and V
VS2
= V
VAUX
= 4.75 V to 5.25 V (car application). Typical values are given
at V
VS1
= V
VS2
= 3 V and T
amb
= 25°C, f
RF
= 433.92 MHz (1-battery application) unless otherwise specified. Details about cur-
rent consumption, timing and digital pin properties can be found in the specific sections of the “Electrical Characteristics”.
No. Parameters Test Conditions Pin (1) Symbol Min. Typ. Max. Unit Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50
Ω
according to Figure 7 on page 10 with
component values according to Table 2 on page 10 and RF_OUT matched to 50
Ω
according to Figure 16 on page 19 with
component values according to Table 7 on page 19.
f
CLK
f
XTO
3
----------- =