Programmable digital delays
16 May 2012
Analogue, Mixed Signal, LSI
LSI/CSI announced the addition of four new devices to its family of programmable digital delay timer ICs. Designated LS7211N, LS7212N, LS7215 and LS7216, they provide delay times programmable from microseconds to days using eight binary-weighted delay bits.
An external clock or oscillator can be used as the time base for these ICs. The on-chip oscillator for the LS7211N and LS7215 is controlled by an external RC while the on-chip oscillator for the LS7212N and LS7216 is controlled by an external crystal.
The ICs can be operated in either of four operating modes: one-shot, delayed operate, delayed release and dual delay. Selectable prescalers are available to generate delays in units of minutes from 50 Hz/60 Hz frequency sources (LS7211N, LS7215) and delays in units of seconds or minutes from a watch crystal (LS7212N, LS7216).
The ability of the LS7215 and LS7216 to latch binary-weighted delay bits from a shared 8-bit bus opens up applications for use in a wide range of microcontroller-based systems. Typical applications include time delay relays for medical equipment, HVAC, automotive, security systems and lighting controls.
Providing added flexibility, the LS7215 and LS7216 have an open-drain output in addition to the standard push-pull output available on the LS7211N and LS7212N. This added output allows the IC to directly drive a relay coil returned to the same voltage as the chip VDD or, using one external transistor, the IC can control a relay coil returned to a voltage as high as 110 V with a chip VDD as low as 3 V. The push-pull output can be used to light an LED to indicate that the relay coil is energised.
Further reading:
maXTouch touchscreen controller for various aspect ratios
EBV Electrolink
Analogue, Mixed Signal, LSI
As the automotive market continues to demand larger touchscreens with more flexibility in size and shape, Microchip Technology is announcing a new maXTouch touchscreen controller that allows automotive
...
Read more...
Precision wideband ADC advances data-acquisition performance
Analogue, Mixed Signal, LSI
Texas Instruments (TI) has introduced a very small 24-bit wideband analog-to-digital converter (ADC) that delivers tight signal-measurement precision. The ADS127L11 achieves ultra-precise data acquisition
...
Read more...
K-band passivated VCO
RF Design
Analogue, Mixed Signal, LSI
The K-VCO-2324 from Arralis is a GaAs PHEMT MMIC voltage-controlled oscillator (VCO) that operates from 23,25 to 24,25 GHz. It provides 15 dBm output power over tuning voltages between 0 V and 1 V and
...
Read more...
QFN-packaged gain blocks covering various frequency ranges
RFiber Solutions
Analogue, Mixed Signal, LSI
Four new gain blocks have been introduced by Atlanta Micro to serve the requirements of various applications, each covering a different range of frequencies.
The AM1127 is a high dynamic range, cascadable
...
Read more...
Digital humidity sensor withstands harsh conditions
Electrocomp
Analogue, Mixed Signal, LSI
Sensirion is expanding its series of fourth-generation humidity sensors to include the SHT4xI-Digital sensor platform, which has been designed specifically for challenging industrial applications. The
...
Read more...
Signal chain implementation for condition monitoring systems
Altron Arrow
Editor's Choice Analogue, Mixed Signal, LSI
Like all system designs, there are many choices to be made when it comes to designing a condition monitoring system, each of which comes with various trade-offs and can drastically alter the DAQ signal chain design.
Read more...
High-speed SAR ADC family
Analogue, Mixed Signal, LSI
Texas Instruments expanded its portfolio of high-speed data converters with a broad family of successive-approximation register (SAR) analog-to-digital converters (ADCs) that enable high-precision data
...
Read more...
Digital flow sensor for respiratory devices
Electrocomp
Analogue, Mixed Signal, LSI
The compact SFM3119 digital flow meter is the successor to Sensirion’s SFM3100 mass flow meter. Compared to its predecessor, the SFM3119 comes with a digital I
2C output as well as improved specifications.
...
Read more...
Liquid flow sensor in small planar package
Electrocomp
Analogue, Mixed Signal, LSI
With a tiny footprint of only
10 x 10 mm, Sensirion’s LPG10-1000 liquid flow sensor provides optimal performance and speed in measuring liquid flow in a planar microfluidic glass substrate, with down-mount
...
Read more...
Wide range of sensor technologies for innovative designs
TRX Electronics
Analogue, Mixed Signal, LSI
Mouser Electronics has created a sensor technology content stream on its website that highlights the latest in innovative sensor solutions and resources from the world’s top manufacturers.
With the
...
Read more...
printer friendly version