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參數(shù)資料
| 型號(hào)： | LA7780M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | QPSK Downconverter for CATV Systems |
| 中文描述： | 調(diào)制變頻器的有線電視系統(tǒng) |
| 文件頁數(shù)： | 2/9頁 |
| 文件大小： | 242K |
| 代理商： | LA7780M |
No. 5268-2/9
LA7780M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Circuit current
I
total
f
(in)
V
O(IF)
V
O(IM3)
BW
Pins 4, 5, 6, and 17: no signal
64
80
95
mA
RF input frequency range
Pins 1, 8, and 9
30
150
MHz
IF output level
Pin 13:
*
1
1.6
2.0
2.5
Vp-p
IF output IM3
Pin 13:
*
2
40
dB
IF output frequency bandwidth
Pin 13:
*
3
15
MHz
Local oscillator frequency range
f
(LO)
Pins 18, 19, 20, and 21
30
200
MHz
AGC amplifier input sensitivity
Vin(RF2)
Pins 8 and 9:
*
4
–25
–21
–17
dBmV
AGC range
GR
Pin 13: IF output level < ±1 dB
60
80
dB
AGC flatness
V
O(IF)
Pin 13: Compare with the state when
Vin (RF2) = 30 dBmV
–1
0
+1
dB
Preamplifier gain
G
(RF1)
V
Omax
Pin 4:
*
5
17
19
21
dB
Maximum preamplifier output level
Pin 4:
*
6
50
dBmV
Oscillator output level
V
O(OSC)
Pin 23: The pin 23 frequency is 1/2 that of
the local oscillator
500
800
1000
mVp-p
AC Characteristics
at Ta = 25°C, V
CC
= 5.0 V, internal AGC mode, Pin 24 is left open.
Operating Modes
Mode
Pin 10
Pin 11
Pin 12
Internal AGC
GND
With a capacitor between
pin 11 and ground
Connected to pin 11
External AGC
GND
With a capacitor between
pin 11 and ground
External AGC voltage supply
Pin 12 = high impedance
(Narrow control range: 3 to 5 V)
(AGC divider inactive)
External AGC
Open
With a capacitor between
pin 11 and ground
External AGC voltage supply
Pin 12 = low impedance (14 k
)
(Wide control range: 0 to 5 V)
(AGC divider active)
Internal AGC
External AGC
Caution:
Note 1.
Input: SG = 69.55 MHz, 20 dBm V
Other conditions:
Internal AGC mode
Pin 24 left open.
Output: The post amplifier output (pin 13) at 5 MHz
Note: In internal AGC mode, the IF output level can be adjusted by varying the pin 24 DC voltage.
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
V
CC
op
Pins 5, 6, and 17
5.0
V
Operating supply voltage range
Pins 5, 6, and 17
4.5 to 5.5
V
Operating Conditions
at Ta = 25°C
Transfer ratio = 1 : 1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7783V-TLM-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA7784 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Downconverter IC for Digital CATV |
| LA7784FN | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Digital CATV Down Converter IC |
| LA7784FN-TLM-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA7784-MPB-E | 功能描述:上下轉(zhuǎn)換器 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
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