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參數(shù)資料
| 型號： | TK14551VTL |
| 廠商： | TOKO INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | FM IF DETECTOR/AMPLIFIER |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO24 |
| 封裝： | TSSOP-24 |
| 文件頁數(shù)： | 6/32頁 |
| 文件大小： | 334K |
| 代理商： | TK14551VTL |
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Page 6
January 2000 TOKO, Inc.
TK14551V
TEST CIRCUIT (CONT.)
Measurement of Battery Save Function:
Battery Save ON: SW1 = 0.2 V position
Battery Save OFF: SW1 = 2 V position
Measurement of Comparator:
SW3 is closed only for the measurement of the RSSI comparator response characteristics and output sink
current, supplying 1 V
to Pin 19.
PG1 is connected only for the measurement of the RSSI comparator response. Input the pulse wave to Pin 20,
and measure the output wave (VD) of Pin 16.
I
SINK1
(RSSI Comparator Output Current):
No IF input. SW2 = V3 position (supplying 0.9 V to Pin 20). SW3 = ON (supplying 1 V to Pin
19). SW5 = V6 position (supplying 3 V to Pin16). Measure the DC current to Pin 16 from
V6.
I
SINK2
(Data Comparator Output Current):
SW9 = V9 position(supplying 1 V Pin 11). SW10 = V10 position (supplying 0.9 V to Pin 12).
SW6 = V7 position (supplying 3 V to Pin 13). Measure the DC current to Pin 13 from V7.
Measurement of T
R
, T
F
, t
PD
(RSSI Comparator, Data Comparator):
RSSI Comparator: No IF input. SW2 = PG1 position. SW3 = ON (supplying 1 V to Pin 19). SW5 = VD position.
Measure the output wave (VD).
Data Comparator: SW9 = 3 k
position. SW10 = 3 k
position. SW6 = VE position. Measure the output wave
(VE).
T
R
, T
: Measure the time between the 10% point and the 90% point of the output wave.
t
PD
: Measure the time between the 50% point of the input wave and the 50% point of the output wave.
Measurement of the Logarithmic Detection of RSSI Output:
SW7 = OFF. SW8 = VB position. Input AM modulation signal SG1(f
= 40 MHz, fm = 2 MHz, mod. = 80%, V
IN
= -60, -40, -15 dBm) to Pin 24. Measure the logarithmic detection output voltage of Pin 10.
The AM demodulating output voltage deflection is standardizing the AM demodulating output voltage in the case
of -40 dBm input, and calculated by the deflection by AM demodulating output voltage in the case of -60, -15
dBm input.
The measurement of demodulating frequency band is standardizing the AM demodulating output voltage of Pin
10 in the case that V
= -40 dBm, f
= 40 MHz, fm = 100 kHz and 80% AM modulating output voltage at Pin 10,
comparing it to the standard output voltage.
Measurement of Output Current of RSSI Buffer Amplifier 2:
SW7 = OFF. SW8 = V8 position. No IF input. SW4 = ON (supplying 1 V to Pin 18). Measure the DC current
(A4) between V8 and Pin 10 in the case of V8 = 3 V, 0 V.
Measurement of Output Impedance of RSSI Buffer Amplifier 2:
No IF input. SW8 = VB position. SW4 = ON (supplying 1 V to Pin 18). At first, SW7 = OFF and measure the
DC current (VB1) of Pin 10. Next, SW7 = ON and measure the DC current (VB8) of Pin 10. The output impedance
(Z
OUT
) is calculated by the following:
Z
OUT
(
) = 10 k ((VB1 - VB2)/(VB2 - 0.5))
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