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With an excellent accuracy
of ±3% between channels,
the AS1110 improves the
picture quality of LED dis-
plays since intensity varia-
tions between LEDs and LED
modules completely disap-
pear.
The AS1110 can be used in
Multiplexed mode, which
means that a single AS1110 can drive up to 64 independ-
ent LED nodes. In Multiplexed mode, the AS1110 still
maintains full functionality of error detection.
Another highlight of the AS1110 is built-in LED error
detection. Easy and intuitive to use, it can be invoked
during normal operation without switching into a sepa-
rate detection mode. This makes software interfacing
even more user friendly, while detection can be done
extremely fast. The AS1110
can detect any open or short
circuit, as well as an over-
temperature occurrence. For
immediate detection of those
errors, a global error flag is
available at serial data out-
put, detecting any of those
errors quickly and precisely.
A detailed error report can be
produced with the exact
position of the broken LED.

portable data-acquisition
systems.
When the LTC2351-14
is not converting, power
dissipation can be further
reduced to 4.5 mW in
Nap mode, with the
internal 2.5-V reference remaining
active, and to 12 mW in Sleep mode,
with all the internal circuitry pow-
ered down. The internal 2.5-V refer-
ence can be overdriven with an exter-
nal reference up to the analog supply
voltage.
The LTC2351-14 uses three input-
select lines to configure the number
of differential inputs converted. Thus,
higher speeds are possi-
ble, from one differential
input at 1.5 Msps to six
differential inputs at 250
Ksps. The six conversion
results are delivered
sequentially to a high-
speed DSP serial port via
a three-wire interface.
This ADC also features a
separate digital-output
power supply pin and a
bipolar/unipolar input

sary for efficient energy-saving motion control
applications. The LM3S618 and LM3S818 are par-
ticularly well suited for controlling a wide range
of variable-speed, three-phase, and single-phase
AC induction motor controls using space vector
or sine wave modulation. The LM3S317,
LM3S617, and LM3S817 are optimized to control
a wide range of stepper motors. Until now, step-
per motor system designers had to choose
between a basic unipolar control method. They
either gave up high torque and a high step rate
capability or a dedicated control chip that lacked
extensible intelligence. The
LM3S317/LM3S617/LM3S817 devices for stepper
motor system control provide the system design-
er with the headroom for high-performance chopper con-
trol in order to operate a stepper motor at both high-
torque and high-step rates. Development kits cost $249
each. The microcontrollers start at $3.31 each for quanti-
ties of 10,000.
Luminary Micro, Inc.
www.luminarymicro.com
NEW ENERGY MEASUREMENT IC
The MCP3909 is a new energy measurement IC. The
highly accurate IC combines low-power consumption
with a SPI and active power-pulse output, making it
adaptable to a wide variety of meter designs. Together
with the MCP3909 three-phase energy meter reference
design, the IC enables designers to develop and bring
meter designs to market quickly.

comes with the reference
design enables meter cali-
brations and the ability to
read active and apparent
power, as well as RMS cur-
rent and RMS voltage. The
reference design costs
$175.
The MCP3909 energy
measurement IC is well
suited for a variety of sin-
gle- and three-phase
industrial and consumer
energy meters. The IC,
which is available in a 24-
pin SSOP package, is
$1.51 each in 10,000-unit
quantities.
Microchip Technology, Inc.
www.microchip.com
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