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ML2751DT Datenblatt(Datasheet) 1 Page - Micro Linear Corporation

Teile-Nr. ML2751DT
Beschreibung  Power Amplifier and LNA
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Hersteller  MICRO-LINEAR [Micro Linear Corporation]
Homepage  http://www.microlinear.com
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January, 2000
DATASHEET
n Fully integrated Power Amplifier, Low Noise Amplifier,
and PIN diode drivers
n 100mW Power Amplifier
n Single supply, 2.7V to 4.5V operating range
n PA output: +21 dBm at 3.0V, 35dB gain, 35%
efficiency at 3.3V after harmonic filter; integrated PA
ramp control
n LNA: noise figure of 2.5dB, –15dBm 3rd-order intercept
point, and –25dBm
GENERAL DESCRIPTION
ML2751 Power Amplifier and LNA
FEATURES
The 2751 is a 900 MHz ISM band radio front-end intended
for use in half duplex radio applications such as cordless
phones and FCC Part 15 compliant devices. It integrates a
power amplifier (PA), a Low Noise Amplifier (LNA), Pin
Diode drivers for an external transmit/receive switch, and
control circuits. The 100mW power amplifier has output
power control with a >20dB range. The ML2751 can be
used to increase battery life and offers output power ramp
control in TDMA applications. An internal LNA eliminates
the need for a discrete design. PIN diode drivers control
the transmit/receive switch directly. Internal logic
individually enables the LNA, PA, and PIN diode drivers.
A power down mode to minimize current consumption is
included.
n 900 MHz FCC Part 15 Radios
n 900 MHz Cordless Telephones
n TDD / TDMA Radios
APPLICATIONS
SIMPLIFIED BLOCK DIAGRAM
PRELIMINARY
PIN DIODE
DRIVERS
RLNI
RAMP
GEN.
CONT.
BLOCK
TRFI
TPS, PAON, FEEN
LNA
PINB
PIN
TRFO
RRFO
PA
POWER
CONTROL
AMP
ML2751
RF PIN
DIODE
SWITCH
ML2721
BATTERY
Memory
LOOP
FILTER
Keypad
Display
Mic.
Speaker
Ringer
Watch
Osc.
Xtal
Baseband IC
(MODEM
CODEC
Protocol
MMI Control)




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