MT1560 Datasheet, PDF (1/2 Pages) Microtune,Inc – RF SILICON AND SYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS, AND AUTOMOTIVE ELECTRONICS

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