MT1550 ETC-unknow, MT1550 Datasheet
MT1550
Manufacturer Part Number
MT1550
Description
Manufacturer
ETC-unknow
Datasheet
1.MT1550.pdf
(2 pages)
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MT1550 UPSTREAM
AMPLIFIER
PRODUCT BRIEF
The MT1550 is a 3.3V programmable
gain upstream amplifier with integrated
anti-aliasing filter.
M I C R O T U N E
MT1550 Upstream Amplifier
RF SILICON AND SYSTEMS SOLUTIONS
FOR BROADBAND COMMUNICATIONS, AUTOMOTIVE ELECTRONICS AND WIRELESS CONNECTIVITY
programmable-gain power amplifier
IC for use in CATV upstream
applications. The Microtune®
MT1550 is a 3.3 volt part optimized
for the DOCSIS 1.1 upstream
standard. The MT1550 also includes
an on-chip input anti-aliasing filter,
thereby reducing external system
costs.
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.
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.
supply, the amplifier’s typical
current draw at maximum gain, or
minimum attenuation, is 259mA.
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 62mA. A shutdown mode
further reduces current to a nominal
of 70µA.
pin MicroLeadFrame™ package
with an exposed pad for the
extended industrial temperature
range of -40°C to +85°C.
The MT1550 is a low-cost
The device’s specified frequency
The MT1550 may be disabled via
Operating from a single +3.3V
The MT1550 is available in a 20-
MT1550 APPLICATIONS
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FEATURES
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Cable modems
Telephony over cable
Set-top box CATV
Integrated on-chip anti-
aliasing filter
Maximum output level of
67dBmV
Low power-up/down
transients of 16mV p-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: -50dBmV in 160kHz
Low transmit-disable output
noise: 1nV / √Hz
Two power-down modes
Primarily for set-top boxes
DOCSIS 1.1 compatible
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MT1550 Summary of contents
Page 1
... AMPLIFIER IC for use in CATV upstream PRODUCT BRIEF applications. The Microtune® MT1550 is a 3.3 volt part optimized for the DOCSIS 1.1 upstream The MT1550 is a 3.3V programmable standard. The MT1550 also includes gain upstream amplifier with integrated an on-chip input anti-aliasing filter, anti-aliasing filter ...
Page 2
... VIN+ kΩ dB VIN NIT Filter Tuning +125 °C +150 °C C SNS +245 °C MT1550 Block Diagram www.microtune.com Vout+ 13 Vout Vcm Vcc VOUT+ Variable Power Attenuator Amp VCM 0.1 µF C EXT VOUT- 0.1 µF R SNS V RSNS Serial ...