MT1560 데이터 시트보기 (PDF) - Microtune,Inc

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MT1560

RF SILICON AND SYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS, AUTOMOTIVE ELECTRONICS AND WIRELESS CONNECTIVITY

Microtune,Inc 

M I C R O T U NE

RF SILICON AND SYSTEMS SOLUTIONS

FOR BROADBAND COMMUNICATIONS, AUTOMOTIVE ELECTRONICS AND WIRELESS CONNECTIVITY

MT1560 UPSTREAM

AMPLIFIER

PRODUCT BRIEF

The MT1560 is a 3.3V programmable

gain upstream amplifier.

MT1560 Upstream Amplifier

The Microtune® MT1560 is a low-

cost programmable-gain power

amplifier IC for use in CATV

upstream applications. The MT1560

is a 3.3 volt part optimized for the

DOCSIS 2.0 upstream standard.

The device’s specified frequency

range is from 5MHz to 65MHz, and

can output 67dBmV through a 1:1

impedance-ratio transformer. A 3-

wire digital serial bus controls the

variable gain, with gain control

available in 1dB steps and a

nominal 59dB gain range.

The MT1560 may be disabled via

an external control pin. The transmit-

disable mode not only minimizes

output noise by shutting off the

output stage, but also maintains its

output impedance at nominal levels.

Output transients are nominally less

than 16mVp-p at 61dBmV output

level during transmit enable/disable

switching.

Operating from a single +3.3V

supply, the amplifier’s typical

current draw at maximum gain, or

minimum attenuation, is 212mA.

Additional internal circuitry reduces

the amplifier’s power consumption

depending on gain setting.

Transmit-disable mode power

supply current is reduced to a

nominal of 18mA. A shutdown mode

further reduces current to a nominal

of 80µA.

The MT1560 is available in a 20-

pin MicroLeadFrame™ package

with an exposed pad for the

extended industrial temperature

range of -40°C to +85°C.

MT1560 APPLICATIONS

• Cable modems

• Telephony over cable

• Set-top box CATV

FEATURES

• Maximum output level of

67dBmV

• Low power-up/down

transients of 16mVp-p typical

at 61dBmV output

• Ultra low third harmonic

distortion

• Single +3.3V supply

• 59dB gain range

• Gain programmable in 1dB

steps

• Low transmit output noise

floor: -51dBmV in 160kHz

• Low transmit-disable output

noise: -68dBmV

• Two power-down modes

• DOCSIS 2.0 compatible

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