www.circuitcellar.com
•
CIRCUIT CELLAR
®
1133
April 2009 – Issue 225
NPN
Standards improve quality and enable
designers to share components across
different projects.Today, ARM
®
Cortex
™
-M profile processors, combined
with the Cortex Microcontroller
Software Interface Standard (CMSIS) and
optimized middleware from the
industry’s largest ecosystem, are setting
the hardware and software standards for
microcontrollers.
These standards enable leading vendors
such as Luminary Micro, NXP, and
STMicroelectronics to supply advanced
microcontrollers, while maximizing code
reuse across multiple platforms.
Standards
Make
Sense
“STM32 microcontrollers revolutionize
the market by combining high
performance and low power with a
scalable product range that fits every
developer's needs.”
Daniel Colonna
Microcontrollers Division
Marketing Director
Cortex-M3
Microcontrollers
Make Sense
For more information visit
www.onARM.com
The Architecture for the
Digital World
®
© ARM Ltd.AD158 | 01.09
SUPER-LOW-DISTORTION DIGITALLY PROGRAMMABLE
IF VGA
The
LLTT55555544
is a broadband, digitally programmable gain IF amplifier, featuring a
48-dBm OIP3 (output third-order intercept) at 200 MHz. The amplifier has low
noise, enabling high dynamic range performance in wireless communication
receivers and signal processing systems. Its gain is digitally controlled from 2 to
18 dB by a 7-bit parallel word, producing the finest 0.125-dB steps gain control
granularity of any amplifier available. The amplifier settles in less than 5 ns from a
gain change, producing low glitch noise and supporting fast and accurate AGC per-
formance. Its output stage has robust capability to drive into 50-Ω loads with low
distortion and noise.
Unique to the LT5554 is its OIP3 performance, which remains consistently high
over a wide varying signal level range. In contrast, the closest competing solution
is limited to only a narrow ±1-dB signal level range. With today’s new generation of
wireless technology, such as LTE (Long-Term Evolution) and WiMAX, which use
modulated signals with a 12-dB crest factor, the need to maintain linearity perform-
ance over wide operating levels is paramount for producing consistent base station
performance.
The LT5554 is a full differential input and output amplifier. Its differential outputs
can drive directly into 50-Ω
loads. The amplifier may be over-
driven and can recover quickly in
less than 5 ns. Additionally, the
amplifier has excellent reverse
isolation. These characteristics
make the LT5554 an ideal ampli-
fier to drive high-speed, high-res-
olution ADCs, where the input
sampling noise can couple back
to the RF and IF circuits.
The LT5554 starts at
$$44..4400
each in 1,000-piece quantities.
Linear Technology Corp.
www.linear.com
QUICK-CONNECT WIRING SYSTEM
The new
MM1166 ppoowweerrffaasstt
wiring system is specifically designed for machine power
distribution and motor control. The quick-connect M16 powerfast system provides a
time- and cost-saving replacement for traditional hard-wiring installations and com-
plies with NFPA 79: Electrical Standard for Industrial Machinery. These two-, three-,
and four-pin connectors and tees provide up to 18 A in a compact form factor.
The cordsets are offered with Tray Rated, exposed run PVC flexlife cable. All con-
nectors deliver IEC IP 67 protection and are rated for 600 V and up to 18 A. Tees
are available with simple connectors or with branches.
Like most TURCK cordsets, the M16
powerfast line offers male or female
options, straight connectors, standard
and custom lengths, and pigtails or
extensions. To complete the system,
fully encapsulated mating receptacles
with nickel-plated brass housing and
0.5″ to 14 NPT, 0.375″ to 18 NPT, M18,
and M20 mounting threads are available.
Prices are dependent on the configu-
ration, please contact TURCK directly.
TURCK, Inc.
www.turck-usa.com
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