Product category: Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: LME49721 and LME49713
Edited by the Electronicstalk Editorial Team on 04 October 2007
Amps expand high-fidelity family
Rail-to-rail input/output op amp's combined specifications provide the high-fidelity performance and signal conditioning required by high-end portable devices.
National Semiconductor has expanded its op amp family with two devices: a 5V rail-to-rail input and output (RRIO) device and a 36V current feedback op amp The LME49721 RRIO op amp's combined specifications provide the high-fidelity performance and signal conditioning required by high-end portable devices and applications where supply rails are limited to lower voltages
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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The LME49713 current feedback op amp delivers ultralow distortion, low noise, extended bandwidth past 190MHz and fast settling times down to 50ns.
Both op amps join a family of high-performance, high-fidelity op amps that includes the award-winning LM4562, which set a new industry standard with 0.00003% total harmonic distortion plus noise (THD+N).
National's dual 5V LME49721 RRIO op amp maximises signal integrity by allowing the input signal and output signals to swing within 20mV of either rail.
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Its low 4.0nV/(rt)Hz input referred noise density and 0.0018% THD+N make it well-suited for lower-voltage supply-rail applications (+/-1.1 to +/-2.5V) such as 5V digital-to-analogue convertors (DACs), portable audio devices, signal conditioning, data acquisition, process control and test equipment.
The single LME49713 current feedback op amp features 1.9nV/(rt)Hz input noise density, THD+N of 0.00008% and 150ohm output drive.
Its 1900V/us slew rate ensures accurate bandwidth and high dynamic range for all signal conditioning applications, including crosspoint switchers, multimedia broadcast systems, HDTV-compatible systems, line drivers and distribution amplifiers.
The LME49721 provides output current capability up to 100mA.
It is unity-gain stable over a wide supply range of plus or minus 1.1 to 2.75V, with power-supply rejection rate (PSRR) of more than 100dB and a typical low input bias current of 40fA.
The output stage of the LME49721 can swing to within 20mV of either power supply voltage when driving 2kohm loads or to within 30mV when driving 600ohm loads.
To ensure high dynamic range, it has a slew rate of 8.5V/us while allowing the input signal to drive to the rails.
The LME49713 is unity-gain stable over a wide supply range of +/-5-18V.
Over this supply range, the LME49713 input circuitry maintains a PSRR of more than 100dB and a common-mode rejection rate (CMRR) of 88dB.
The settling time to within 0.1% is 50ns for a 10V step.
The LME49721 is available now in an 8-lead SOIC package and is priced at $1.50 each in 1000-unit quantities.
The LME49713's 8-lead, narrow-body SOIC package is priced at $2.49 each in 1000-unit quantities.
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