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PDF EC5462 Data sheet ( Hoja de datos )
| Número de pieza | EC5462 | |
| Descripción | High Slew Rate Rail-to-Rail Dual Operational Amplifiers | |
| Fabricantes | E-CMOS | |
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EC5462
High Slew Rate Rail-to-Rail Dual Operational Amplifiers
FEATURES
• Wide supply voltage range 4.5V ~
16V
• Input range 500mV beyond the rails
• Unity-gain stable
• Rail-to-rail output swing
• High slew rate 20V/μs
• GBWP 8MHz
• 12 MHz -3dB Bandwidth
• Ultra-small Package MSOP-8
APPLICATIONS
• TFT-LCD Reference Driver
• Touch-Screen Display
• Wireless LANs
• Personal Communication Devices
• Direct Access Arrangement
• Personal Digital Assistant (PDA)
• Active Filter
• Sampling ADC Amplifier
• ADC/DAC Buffer
• Electronic Notebook
• Office Automation
• Portable Electronics
GENERAL DESCRIPTION
The EC5462 is a rail-to-rail dual channels
operational amplifier with wide supply range
from 4.5V to 16V. It provides 0.5V beyond the
supply rails of common mode input range and
capability of rail-to-rail output swing as well.
This enables the amplifier to offer maximum
dynamic range at any supply voltage among
many applications. A 8MHz gain bandwidth
product allows EC5462 to perform more stable
than other devices in Internet applications.
With features of 20V/μs high slew rate and
200ns of fast settling time, as well as 30mA
(sink and source) of high output driving
capability, the EC5462 is ideal for the
requirements of flat panel Thin Film Transistor
Liquid Crystal Displays (TFT-LCD) panel
grayscale reference buffers application. Due to
insensitive to power supply variation, EC5462
offers flexibility of use in multitude of
applications such as battery power, portable
devices and anywhere low power consumption
is concerned. With standard operational
amplifier pin assignment, the EC5462 is
offered in a space saving 8-Pin MSOP package
and specified over the -40°C to +85°C
temperature range.
PIN ASSIGNMENT
VOUTA
1
VINA-
2
VINA+
3
-
+
Vs- 4
8 Vs+
7 VOUTB
6 VINB-
-
+
5 VINB+
Package Type : MSOP
P 1/8
DR18EC5462-Ver1.2
1 page  
EC5462
High Slew Rate Rail-to-Rail Dual Operational Amplifiers
APPLICATIONS INFORMATION
Product Description
The EC5462 rail-to-rail dual channels 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 3.2V/µS
high slew rate, fast settling time, 3.5MHz of GBWP as
well as high output driving capability have proven the
EC5462 a good voltage reference buffer in TFT-LCD for
grayscale reference applications. High phase margin and
extremely low power consumption (500µA per amplifier)
make the EC5462 ideal for Connected in voltage
follower mode for low power high drive applications
Supply Voltage, Input Range and Output Swing
The EC5462 can be operated with a single nominal wide
supply voltage ranging from 4.5V to 18V with stable
performance over operating temperatures 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 EC5462 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 EC5462 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 1. Operation with Rail-to-Rail Input and
Output
Output Short Circuit Current Limit
A +/-120mA short circuit current will be limited by the
EC5462 if the output is directly shorted to the positive or
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 +/-30 mA such that
the maximum reliability can be well maintained.
Output Phase Reversal
The EC5462 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.
Figure 2. Operation with Beyond-the Rails Input
Power Dissipation
The EC5462 is designed for maximum output current
capability. Even though momentary output shorted to
ground causes little damage to device.
For the high drive amplifier EC5462, it is possible to
exceed the 'absolute-maximum junction temperature'
under certain load current conditions. Therefore, it is
important to calculate the maximum junction
temperature for the application to determine if load
conditions need to be modified for the amplifier to
remain in the safe operating area. The maximum power
dissipation allowed in a package is determined according
to:
PDmax
=
TJmax - TAmax
ΘJA
Where:
TJmax = Maximum Junction Temperature
TAmax= Maximum Ambient Temperature
ΘJA = Thermal Resistance of the Package
PDmax = Maximum Power Dissipation in the Package.
The maximum power dissipation actually produced by an
IC is the total quiescent supply current times the total
the negative supply. For an indefinitely output short
P 5/8
DR18EC5462-Ver1.2
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet EC5462.PDF ] | |
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