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參數(shù)資料
| 型號(hào)： | P12611EJ1V0AN00 |
| 英文描述： | MCU CMOS 28 LD 20MHZ 8K FLASH, -40C to +85C, 28-SOIC 300mil, TUBE |
| 中文描述： | uPB1509GV 1 GHz的輸入除以2。 4。 8預(yù)分頻器集成電路便攜式無線電系統(tǒng) |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 110K |
| 代理商： | P12611EJ1V0AN00 |
7
Figure 2-7. Test Circuit for
μ
PB1509GV
Equipment
Signal Generator (HP-8665A)
A counter (HP5350B) is used to measure the input sensitivity.
(Alternatively, a spectrum analyzer can be used to monitor the output frequency.)
An oscilloscope is used to monitor the output amplitude.
(When a spectrum analyzer is used to monitor the output power, disconnect the probe of the oscilloscope.)
Divide ratios and pin connections
Parts
SW2
Connected to V
CC1
pin
Connected to GND
or leave OPEN
Connected to V
CC1
pin
1/2
1/4
Connected to
GND or leave
OPEN
1/4
1/8
[Precautions on measurement]
Notes 1.
In the test circuit, set R1 so that R1 + instrument impedance is 200
for the measured IC. R1 is
unnecessary in actual applications.
2.
Use an oscilloscope connected with a high-impedance RF probe when measuring the output amplitude
with the test circuit shown in the Data Sheet. If a spectrum analyzer is used to monitor the output
frequency as an alternative for the counter, note that the power level displayed on the analyzer screen
may be lower than the actual value because of the inserted resistor.
Type
Value
C1 to C7
1000 pF
R1
150
Note 1
SW1
On-display decrease P (dB) = 10 log
where, R1 is the RF resistance to create a pseudo load impedance for the test circuit, and Z
me
is the instru-
ment impedance.
Because R1 = 150
and Z
me
= 50
in the test circuit, P = 6 dB.
R1 + Z
me
Z
me
1
2
3
4
8
C7
Output line stray
capacitance: 2 to 3 pF
High impedance
probe
Note 2
Z = 1M
//0.6 pF
Oscillo-
scope
R1
Note1
C6
C5
C4
1000 pF
7
6
5
50
C1
V
CC1
Power supply
IN
IN
GND
Signal
generator
V
CC2
OUT
SW2
SW1
C2
C3
Counter
(or spectrum
analyzer)
50
150
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