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參數(shù)資料
| 型號： | KESTX01IG |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | 400MHz - 460MHz ASK Transmitter |
| 中文描述： | 400MHz的- 460MHz ASK發(fā)射 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大小： | 266K |
| 代理商： | KESTX01IG |
7
KESTX01
y
)
p
OP
OPb
XTAL2
XTAL1
Rs
CLK
C
COMPONENT LIST at 433.92MHz
COMPONENTS
R1
R2
C1
FUNCTION
VALUE
2.0
4.7
APPLICATION
DEPENDENT
APPLICATION
DEPENDENT
220
10
6.78
18
18
UNITS
k
k
pF
OUTPUT POWER CONTROL
PLL LOOP FILTER
ANTENNA TUNING
L1 and L2
ANTENNA TUNING
nH
C2
C3
X1
C4
C5
PLL LOOP FILTER
PLL LOOP FILTER
PARALLEL RESONANT CRYSTAL
CRYSTAL OSCILLATOR
CRYSTAL OSCILLATOR
pF
nF
MHz
pF
pF
Note:
The value of C1 is split between two capacitors to aid in balancing the antenna loop reducing the level of the second
harmonic
TESTABILITY REQUIREMENTS
This section is a summary of the observability and control-
lability requirements identified to simplify the production test
requirements of the device.
1. Ability to directly drive the XTAL oscillator from the tester (no
crystal). The XTAL2 pin allows direct drive of the oscillator with
an external clock source as shown in Figure 7. Typically a
200mVpk clock signal is AC coupled to produce differential
output on OP and OPb. (C=10nF, R s (Source) <5k
)
Figure 7 Direct drive of crystal oscillator
2.
signal pin. The output of the dividers is tested by measuring
the DC current output of the charge pump (with XTAL2 held
at V
CC
).
Control of the VCO frequency is obtained via the LF1
3.
measuring the current through the open collector outputs OUT
and OUTB. The VCO input to the power amplifier is disabled
with VCOTST tied to V
CC
and the bias current being measured
with DATA tied to V
CC
. Toggling DATA input will modulate the
bias current in the power amplifier.
DC operation of the power amplifier is observed by
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