1 Features ●Continuous Short-Circuit Protection ●Wide Common-Mode and Differential Voltage Ranges ●No Frequency Compensation Required ●Low Power Consumption ●No Latch-Up ●Unity-Gain Bandwidth: 3 MHz Typ ●Gain and Phase Match Between Amplifiers ●Low Noise: 8 nV/VHz Typ at 1 kHz
2 Applications ●DVD Recorders and Players ●Pro Audio Mixers
3 Description The RC4558 device is a dual general-purpose operational amplifer,
with each half electrically similar to the μA741,
except that offset null capability is not provided.
The high common-mode input voltage range ,
and the absence of latch-up make this amplifier ideal for
voltage-follower applications.
The device is short- circuit protected,
and the internal frequency compensation ensures stability without
external components.
4.3 Feature Description
4.3.1 Unity-Gain Bandwidth The unity-gain bandwidth is the
frequency up to which an amplifier with a unity gain
may be operated without greatly distorting the signal. The RC4558
device has a 3-MHz unity-gain bandwidth.
4.3.2 Common-Mode Rejection Ratio The common-mode rejection ratio
(CMRR)
of an amplifier is a measure of how well the device rejects
unwanted input signals common to both input leads.
It is found by taking the ratio of the change in input offset
voltage to the change in the input voltage,
then converting to decibels. Ideally the CMRR is infinite,
but in practice, amplifiers are designed to have it as high as
possible.
The CMRR of the RC4558 device is 90 dB.
4.3.3 Slew Rate The slew rate is the rate at which an operational
amplifier can change its output when there is a change on the
input.
The RC4558 device has a 1.7 V/μs slew rate.
4.3.4 Device Functional Modes The RC4558 device is powered on when
the supply is connected.
Each of these devices can be operated as a single supply
operational amplifier or dual supply amplifier depending on the
application.
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