Product category: Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: LM6211
Edited by the Electronicstalk Editorial Team on 15 March 2006
Op amp also aims for low-noise
applications
A rail-to-rail output CMOS op amp from offers a wide operating range up to 24V and meets the low-noise, low-power and low-input bias requirements of industrial and telecomms applications.
A new rail-to-rail output CMOS operational amplifier from National Semiconductor offers a wide operating range up to 24V and meets the demanding low-noise, low-power and low-input bias requirements of industrial and telecommunications applications The LM6211 is a 20MHz wide-bandwidth, low-noise operational amplifier with a single supply- voltage range of 5 to 24V and a 0.5pA low input bias current for easy interface with high impedance sources
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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With an input voltage noise of 5.5nV/(rt)Hz at 10kHz and 10fA/(rt)Hz input current noise, the LM6211 improves signal fidelity found in wireless and sensor interface applications.
In addition, its low input capacitance ensures stability when used at high frequencies or in high-gain sensor applications.
To accurately monitor voltage conditions with minimal system power consumption, the LM6211 draws a low supply current of less than 1mA.
The LM6211, built on National's proprietary power vertically integrated PNP or PVIP family of BiCMOS processes, has a CMOS input stage that enables high-input-impedance sources and higher-bandwidth operation.
This op amp has guaranteed performance from -40 to +125C.
It also has output short-circuit current protection, which limits the current to 25mA, and a slew rate of 5.6V/us.
The LM6211's rail-to-rail output stage remains stable with capacitive loads as high as 500pF, providing the maximum possible dynamic range at the output.
The dynamic range is important for applications requiring a large output swing, such as wideband, phase-locked loop (PLL) synthesisers, which need an active loop filter to drive a wide frequency range voltage-controlled oscillator (VCO).
The LM6211 can be used with larger resistors thanks to its smaller input capacitance of 5.5pF at 24V, providing more gain without instability.
This also makes the LM6211 ideal for wideband transimpedance amplifiers, which require a wide bandwidth, low input referred noise and low input capacitance.
The op amp also is well suited for low-noise applications that require an operational amplifier with very low input bias currents and a maximum output voltage swing of 24V, such as an active loop-filter for PLLs.
Available now in a SOT23-5 package, the LM6211 is priced at $1.19 in 1000-unit quantities.
Lead-free package options are also available.
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