Product category: Power Supply ICs and Controllers
News Release from: Supertex | Subject: HV256 and HV257
Edited by the Electronicstalk Editorial Team on 25 November 2002
MEMS drivers handle 32 channels at once
The HV256 and HV257 are 32-channel, integrated amplifier array ICs that operate on a single 300V supply
Each channel of HV256 and HV257 is configured as a noninverting amplifier with programmable external current limit protection, while HV257 also features 32 sample-and-hold circuits that share a common analogue input. Both ICs were designed to drive MEMS (microelectromechanical systems) in optical networking systems, such as optical crossconnects, switches and tunable photonic modules.
This article was originally published on Electronicstalk on 25 November 2002 at 8.00am (UK)
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With 32 amplifiers integrated on one chip, system designers can save valuable board space, simplifies board layout and reduces design time and cost.
By using HV257 with its sample-and-hold circuits, the number of input DACs can be reduced by as much as 32X.
Supertex is the industry's first company to combine an array of low-voltage sample-and-hold circuits with high-voltage amplifiers on the same chip.
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Output voltage per channel can swing up to 295V providing wide movement for an optical MEMS with a typical slew rate of 2.0V/ms, thus providing sufficient switching time from one optical fibre line to another.
According to In-Stat MDR, the worldwide market for MEMS has been predicted to grow from $3.9 billion in 2001, to $9.5 billion in 2006, an average growth rate of 19.5%.
The integration of MEMS with electronics on the same module could, in theory, improve performance, efficiency and reliability of the overall module and reduce its manufacturing and packaging costs.
"Optical MEMS is becoming a horizontal enabling technology that will surely serve a number of broad vertical markets", said Brian Hedayati, Director of Marketing at Supertex.
"With the addition of HV256 and HV257 to the Supertex family of high voltage MEMS driver ICs, we are well positioned to enable many applications across a variety of industry sectors.
We feel that our MEMS driver ICs will facilitate these applications to market in less time and at a lower cost".
HV256 and HV257 operate at a 300V supply voltage with integrated high-value gain-setting resistors for an internal feedback path.
These internal feedback resistors and very low operating current (maximum 25mA per channel) minimise power consumption and dissipation.
Both have an integrated diode included to facilitate monitoring of die temperature for external temperature compensation and thermal protection.
Samples of HV256FG and HV257FG are available from stock in small 100-lead MQFP packages (lead to lead 17 x 23mm) and in die form HV256X/HV257X.
Lead-time for production quantities is 8 to 12 weeks ARO, HV256FG is priced at US $150.00 each; HV257FG at $178.00 each in 1000-off quantities.
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