Nuts & Volts

■ H A R D W A R E ■ S O F T W A R E ■ G A D G E T S ■ T O O L S
MONOLITHIC
DUAL JFETs
Linear Integrated Systems (LIS), a leading
full-service manufacturer of specialty
linear semiconductors, announces
the immediate
availability of
its LSK389
series of 1nV
N-Channel
Monolithic
NEW!
Dual JFETs. The LSK389 series is a monolithic
dual version of the recently released
LSK170 Single N-Channel JFET. This family
of ultra low noise dual JFETs was
specifically designed to provide users a
better performing, less time consuming,
and cheaper solution for obtaining tighter
IDSS matching, and better thermal tracking,
than matching individual JFETs. Available
packaged in surface mount, ROHS
compliant versions, the LSK389 is an
ideal improved functional replacement
for the through-hole Toshiba 2SK389,
HIDmaker FS for Full Speed FLASH PIC18F4550
Creates complete PC and Peripheral
programs that talk to each other over
USB. Ready to compile and run!
• Large data Reports
• 64,000 bytes/sec per Interface
• Easily creates devices with multiple
Interfaces, even multiple Identities!
• Automatically does MULTITASKING
• Makes standard or special USB HID
devices
NEW! “Developers Guide for USB HID
Peripherals” shows you how to make
devices for special requirements.
The Standard for checking
Capacitors in-circuit
Good enough to be the
choice of Panasonic,
Pioneer, NBC, ABC, Ford,
JVC, NASA and thousands
of independent service
technicians.
Inexpensive enough to pay for itself in just
one day’s repairs. At $209, it’s affordable.
And with a 60 day trial period, satisfaction
guaranteed or money-back policy, the only
thing you can lose is all the time you’re
currently spending on trying to repair all
those dogs you’ve given up on.
CapAnalyzer 88A
Both PC and Peripheral programs
understand your data items (even odd
sized ones), and give you convenient
variables to handle them.
PIC18F Compilers: PICBASIC Pro,
MPASM, C18, Hi-Tech C.
PIC16C Compilers: PICBASIC Pro,
MPASM, Hi-Tech C, CCS C.
PC Compilers: Delphi, C++ Builder,
Visual Basic 6.
HIDmaker FS Combo: Only $599.95
DOWNLOAD the HIDmaker FS Test Drive today!
www.TraceSystemsInc.com
301-262-0300
Locate shorted or leaky
components or conditions
to the exact spot in-circuit
Still cutting up the pcb,
and unsoldering every
part trying to guess at
where the short is
$209
Your DVM shows the same shorted reading all
along the pcb trace. LeakSeeker 82B has the
resolution to find the defective component.
Touch pads along the trace, and LeakSeeker
beeps highest in pitch at the defect’s pad. Now
you can locate a shorted part only a quarter of
an inch away from a good part. Short can be
from 0 to 150 ohms
LeakSeeker 82B
Available at your distributor, or call 561-487-6103
Electronic Design Specialists
www.eds-inc.com
within space limited circuits for audio and
instrumentation applications.
The LSK389’s features incorporate
three grades of IDSS: 2.6-6.5 mA, 6.0-12
mA, 10-20 mA, with an IDSS match of
10%, a gate threshold offset of 20 mV, a
voltage noise (en) of 1 nv/Hz @ 1 kHz, 2
nv/Hz @ 10 Hz typical, with a gain of 22
ms, and 22 pf of capacitance.
The LSK389 series helps to maximize
battery operated applications by
providing a wide output swing and a
high signal-to-noise ratio as a result of
the LSK389’s tightly matched gate
threshold voltages and low gate threshold
voltages. The uniquely linear VGS
transfer function is highly desirable for
producing low intermodulation in audio
front-ends. The 40 volt breakdown provides
maximum linear headroom in high
transient program content amplifiers.
The LSK389 provides a low input noise
to capacitance product that has nearly
zero popcorn noise. The narrow ranges
of the IDSS electrical grades combined
with the matching performance of the
LSK389’s monolithic dual construction
promote ease of device tolerancing in
low voltage applications, as compared
to matching single JFETs. Additionally,
LIS offers custom screening for users
who require different ranges of IDSS,
VGS, or other DC parameters that are
not covered in the datasheet.
The LSK389 series is packaged in
surface mount SOIC-8 and thru-hole
TO-71 six lead packages and lead-free,
ROHS compliant versions are available.
“Our new LSK389 series features
a unique design construction of
interleaving both JFETs on the same
piece of silicon that provides
excellent matching and thermal tracking,
as well a low noise profile having
nearly zero popcorn noise,” says Dr.
John Hall, Linear Integrated Systems
founder and president.
Linear Integrated Systems
domestic in-factory stock provides
short lead times, helping to ensure no
disruption in production schedules.
Applications include audio amplifiers
and preamps, discrete low-noise
operational amplifiers, batteryoperated
audio preamps, audio mixer
consoles, acoustic sensors, sonic
imaging, instrumentation amplifiers,
microphones, sonobouys, hydro-
36 March 2006