Product category:
Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: LMP7711/7701, LPV511, LMV791, LMV651 and LPV7215
Edited by the Electronicstalk Editorial
Team on 27 September 2005
New process improves op amp performance
Six new operational amplifiers feature significant improvements in accuracy, low power consumption and voltage noise for industrial, medical and automotive applications.
Six operational amplifiers from National Semiconductor built on its new, proprietary VIP50 process technology, feature significant improvements in accuracy, low power consumption and voltage noise for industrial, medical and automotive applications These improvements, combined with the products' small size, also make them well suited for portable applications
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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As the industry leader in low-power, low-voltage amplifiers, National's four latest products in this market, the LMV651, LMV791, LPV511 and LPV7215, offer world-class gain bandwidth product performance.
For example, the 12MHz, unity-gain bandwidth LMV651 amplifier provides 90% power savings over major competitive offerings in SOT and SC70 packages.
Other products feature sub-1uA performance and functional operation up to 12V, as well as nanoamp comparators with 6.6us of propagation delay in SC70 packaging.
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Expanding its precision amplifier portfolio, National is also introducing the LMP7701 and LMP7711, the first products in a series of next-generation operational amplifiers that offer higher performance, sub-300uV of input offset with guaranteed input bias of less than 200fA, and up to 12V operation.
"Customers are demanding higher levels of performance with lower power consumption".
"That's where advanced process technology allows National Semiconductor to differentiate itself", said Erroll Dietz, Vice President of National's Amplifier Group.
"With VIP50, National is leveraging its expertise in process technology to create high-performance amplifiers".
"These six new products allow us to expand our precision line while maintaining our leadership position in low-voltage, low-power products".
The LMP7711 single amplifier offers low current (50fA) metal oxide silicon (MOS) inputs while still providing low-noise (less than 7nV/(rt)Hz) performance, minimising distortion and signal- conditioning errors.
Precision thin-film resistors and well-matched transistor pairs are used to guarantee input offset errors of less than 200uV, increase common-mode rejection ratio (CMRR of 95dB) and increase power supply rejection ratio (PSRR of 100dB) performance, while maintaining a low offset voltage drift of 1uV/C over extreme temperatures (-40 to +125C).
The LMP7701 precision amplifier operates from 2.7 to 12V supply voltages and has rail-to-rail CMOS inputs with low input-bias current (200fA).
Trim and design techniques eliminate the large offset glitch associated with conventional CMOS rail-to-rail input amplifiers, improving the input offset voltage of less than 300uV across the entire common-mode voltage range (0 to 12V).
It also employs a patented correction technique to reduce the large temperature coefficient of the offset voltage commonly found in CMOS precision amplifiers.
Both products are available in a SOT23 package.
The LMV791 low-noise CMOS input operational amplifier offers 5.8nV/(rt)Hz of flat band noise.
Its low offset voltage of less than 1.3mV and low temperature coefficient of less than 3uV/C improve overall system accuracy.
The 100dB PSRR and 95dB CMRR provide the DC performance needed in high-performance applications.
A shutdown feature reduces power consumption to less than 1uA when in idle mode.
The LMV791 is available in a six-lead TSOT23 package.
The LMV651's high-efficiency design provides 90% power savings over previous-generation operational amplifiers by consuming only 115uA while maintaining a 12MHz unity-gain bandwidth and a low 1/f noise voltage of 17nV/(rt)Hz.
Its less than 1mV input offset voltage, 100dB CMRR and 95dB PSRR improve the overall DC system accuracy across various input voltages and supply voltages.
The LMV651 is offered in an SC70 package.
The LPV511 micropower operational amplifier and the LPV7215 micropower comparator consume less than 900 and 600nA of supply current, respectively.
Both products offer rail-to-rail inputs and outputs.
The LPV511 is specified for 2.7 to 12V operation, and the LPV7215 comparator is operational from 1.8 to 5V.
The LPV7215 offers a 6.6us propagation delay that quickly detects if a voltage fault condition has occurred, sending a precise output response to a microcontroller or other system diagnostic IC.
The space-saving SC70 package and -40 to +85C temperature range make these products suitable for continuously on, battery-powered applications, such as smoke detectors, as well as industrial, telecommunications and automotive applications.
These six new products are designed on the VIP50 process, a silicon-on-insulator BiCMOS process with trimmable, highly-accurate thin-film resistors created exclusively for the development of advanced analogue operational amplifiers and comparators.
The VIP50 process allows National to design a new series of precision operational amplifiers, along with the most power-efficient, low-voltage amplifiers on the market.
The LMP7711, LMP7701, LPV511, LMV791, LMV651 and LPV7215 are available now.
The LMP7711 is priced at $1.55 in 1000-unit quantities.
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