E-MAY16-TTI:E-MAY16-TTI 16/05/2016 14:14 Page 1 EDITOR’S CHOICE PRODUCTS
LOW STANDBY CURRENT BACKUP BATTERY
A dual input monolithic power prioritiser for 1.8V to 18V systems has been introduced by Linear Technology Corporation. The LTC4420 powers the load from the higher priority main supply such as a wall adapter or battery, switching to the backup supply - typically a battery or large-value capacitor - during primary brownout or power loss conditions. With up to 18V operating capability, this device accommodates a wide range of power sources such as wall adapters, USB ports, supercapacitors, and stacked batteries with Li-Ion, alkaline or NiMH cells. By reducing device operating current to 3.6µA and the backup supply’s standby current drain to a low 0.32μA, the LTC4420 extends run time in portable battery-operated systems. Unlike other solutions, this device does not require the backup supply
voltage to be lower than the main supply voltage. When the backup supply voltage is higher than the main supply voltage, a prioritiser is a better solution than a simple diode-OR as the prioritiser does not necessarily draw current from the highest voltage supply. Internal 500mA (min) current- limited switches multiplex from the primary to the backup supply when the primary voltage falls below the adjustable switchover threshold. Carefully designed break-before-make fast switch control blocks reverse
and cross conduction currents while minimising output voltage droop. To reduce quiescent current, the backup supply’s resistive divider is connected to a strobed ground with a duty cycle that is adjustable down to a low 0.0015%, and an optional undervoltage disconnect prevents deeply discharged batteries. A freshness seal mode further lowers standby current to 0.12µA, minimising battery discharge during product storage and shipment. Reversed-battery voltages up to −15V are blocked from propagating to the load.
www.linear.com
Pulse Generators without compromise
True pulse generators to 50MHz New TGP3100 Series
Unlike DDS function generators, the TGP3100 Series uses a true pulse generator architecture that gives ultra-fine control of width and delay, and provides low jitter operation when asynchronously triggered.
STATE-OF–THE-ART
ELECTRONICS LABORATORY Tektronix in partnership with TTi Distribution, and University of Warwick, School of Engineering, is to open a new fully equipped state-of–the-art undergraduate electronics teaching laboratory with wireless communications. Fully equipped with the latest Tektronix bench test solutions and TekSmarkLab, the laboratory will enable users to focus on gaining critical hands-on skills. The new 100-seat laboratory allows first and second year
students to perform practical electronics experiments on 50 benches. Each of the 50 benches are equipped with Tektronix and Keithley products including: a digital storage oscilloscope, arbitrary function generator, triple output power supply and digital multimeters. In addition, the benches have a PC with two large 24- inch monitors, along with soldering and fume extraction capabilities. Each bench is connected to a TekSmartLab server via Wi-Fi to provide total connectivity and accessibility. Instead of using USB thumb drives to connect to oscilloscopes,
students can now retrieve test results wirelessly by scanning a work station specific QR code with their smartphones. TekSmartLab allows students to remotely access and control instruments, download courseware, obtain results and produce reports using smartphones, tablets or PCs. This platform also enables managers to proactively manage classes
before, during and after lab sessions - from batch instrument configuration, remote autoset disable, centralised status monitoring and wireless retrieval of test results, to managing inventory with serial number identification and measuring utilisation per student. “This is Europe’s largest education laboratory bench
refurbishment we’ve completed yet with TekSmartLab. We are very excited in the partnership with TTid and the opportunity to work with a prestigious University like Warwick in supporting this project. We are leading the way in not only providing better teaching, but providing a full learning experience using real-world, state-of- the-art Tektronix solutions,” said David Farrell, vice president, EMEA Commercial Operations at Tektronix.
www.tektronix.com
/ ELECTRONICS
Pulse waveforms from 1mHz to 50MHz, rise time 5ns
Low jitter asynchronous operation, externally triggered pulses or pulse reconstruction
Pulse period, width and delay resolutions of 100ps Pulse, double pulse, pulse pattern and PRBS waveforms Independently variable rise/fall times from 5ns to 800s High drive output can provide 20V pk-pk into 50
Wide range of pulse modulations including AM, FM, PM, FSK, BPSK, SUM, PWM, PDM; internal or external source
Full Noise generator to 25MHz with selectable crest factor and user defined distribution
Full Arbitrary/Function generator with 16 waveform types - sine waves up to 50MHz 800MS/s, 16-bit arbitrary waveform capability
Extensive internal/external modulation and sweeping of all waveform types
Internal channel coupling, tracking and modulations (2 channel models)
GPIB, USB and LXI compliant LAN interfaces
Single or dual channel models are available with a maximum frequency of 25MHz or 50MHz.
Get the full picture .. For full information on the TGP3100 Series go to:
aimtti.com Measurably better value
Glebe Road, Huntingdon, Cambridgeshire, PE29 7DR Tel: 01480 412451 e-mail:
info@aimtti.com Web:
www.aimtti.com
ELECTRONICS | SEPTEMBER 2016 7
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