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參數(shù)資料
| 型號(hào)： | LA7790M |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 174K |
| 代理商： | LA7790M |
Overview
The LA7790M is a QPSK data transmitter for digital cable
TV applications. By integrating the I/Q quadrature
modulator, RF amplifier, electronic volume control, mute
control, and other functions onto a single chip, parts count
is reduced and set size is miniaturized.
Features
Maximum RF amplifier output level of +10 dBm (75
terminator), suitable for directly driving the cable.
RF output frequency range of 5 to 70 MHz. Frequency
range selection function permits broadband designs.
Electronic volume control for direct-current control of
RF output level.
Muting ensures ample attenuation during periods with
no transmission.
Support for both internal and external bias for I/Q
modulation inputs.
Support for I/Q modulation frequencies up to 10 MHz.
(typ: 500 mVp-p)
Functions
I/Q quadrature modulator
I/Q input bias power supply
RF amplifier
Varactor diode-based VCO
Muting
Electronic volume control
Power-saving modes
Switchable output frequency range
Power supply voltage of 5 V (4.5 to 5.5 V)
Package Dimensions
unit: mm
3108-MFP24D
Monolithic Linear IC
5061998RM (OT) No. 5689-1/14
SANYO: MFP24D
[LA7790M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
QPSK Transmitter for Cable TV
LA7790M
Ordering number : EN5689A
Ambient temperature, Ta (°C)
Allowable
power
dissipation,
Pd
max
(mW)
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