EC5601

High Slew Rate Rail-to-Rail Single

Operational Amplifiers with OTP

2010/11/29

Page 4 of 11

Figure (d) Large Signal Transient Response

APPLICATIONS INFORMATION

Product Description

The EC5601 rail-to-rail one channel amplifier is

built on an advanced high voltage CMOS process.

It’s beyond rails input capability and full swing of

output range makes itself an ideal amplifier for use

in a wide range of general-purpose applications. The

features of 40V/μs high slew rate, fast settling time,

30MHz of GBWP as well as high output driving

capability have proven the EC5601 a good voltage

reference buffer in TFT-LCD for grayscale reference

applications. High phase margin and extremely low

power consumption make the EC5601 ideal for

connected in voltage follower mode for low power

high drive applications.

Supply Voltage, Input Range and Output Swing

The EC5601 can be operated with a single

nominal wide supply voltage ranging from 6V to

18V

with

stable

performance

over

operating

temperature of -40°C to +85°C. With 500mV greater

than rail-to-rail input common mode voltage range

and 70dB of Common Mode Rejection Ratio, the

EC5601 allows a wide range sensing among many

applications without having any concerns over

exceeding

the

range

and

no

compromise

in

accuracy. The

output

swings

of

the

EC5601

typically extend to within 80mV of positive and

negative supply rails with load currents of 5mA. The

output voltage swing can be even closer to the

supply rails by merely decreasing the load current.

Figure 1 shows the input and output waveforms for

the device in the unity-gain configuration. The

amplifier is operated under ±5V supply with a 10KΩ

load connected to GND. The input is a 10Vp-p

sinusoid. An Approximately 9.985 Vp-p of output

voltage swing can be easily achieved.

Figure (e) Large Signal Transient Response

Figure 1. Operation with Rail-to-Rail Input and

Output

Output Short Circuit Current Limit

A +/-350mA short circuit current will be limited by

the EC5601 if the output is directly shorted to the

positive or the negative supply. For an indefinitely

output short circuit, the power dissipation could easily

increase such that the device may be damaged. The

internal metal interconnections are well designed to

prevent the output continuous current from exceeding

+/-100mA such that the maximum reliability can be

well maintained.

Output Phase Reversal

The EC5601 is designed to prevent its output

from being phase reversal as long as the input

voltage is limited from VS- -0.5V to VS+ +0.5V.

Figure 2 shows a photo of the device output with its

input voltage driven beyond the supply rails. Although

the phase of

the device's output will

not be

reversed, the input's over-voltage should be avoided.

An improper input voltage exceeds supply range by

more than 0.6V may result in an over stress

damage.