EL5211A Просмотр технического описания (PDF) - Intersil
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EL5211A Datasheet PDF : 11 Pages
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EL5211A
Pin Descriptions
PIN NUMBER
1
PIN NAME
VOUTA
FUNCTION
Amplifier A output
2
VINA-
Amplifier A inverting input
EQUIVALENT CIRCUIT
VS+
VS-
GND
CIRCUIT 1
VS+
3
VINA+
Amplifier A non-inverting input
4
VS-
Negative power supply
5
VINB+
Amplifier B non-inverting input
6
VINB-
Amplifier B inverting input
7
VOUTB
Amplifier B output
8
VS+
Positive power supply
Applications Information
Product Description
The EL5211A voltage feedback amplifier is fabricated using
a high voltage CMOS process. It exhibits rail-to-rail input and
output capability, is unity gain stable, and has low power
consumption (2.5mA per amplifier). These features make
the EL5211A ideal for a wide range of general-purpose
applications. Connected in voltage follower mode and driving
a load of 1kΩ, the EL5211A has a -3dB bandwidth of 60MHz
while maintaining a 75V/µs slew rate. The EL5211A is a dual
amplifier.
Operating Voltage, Input, and Output
The EL5211A is specified with a single nominal supply
voltage from 5V to 15V or a split supply with its total range
from 5V to 15V. Correct operation is guaranteed for a supply
range of 4.5V to 16.5V. Most EL5211A specifications are
stable over both the full supply range and operating
temperatures of -40°C to +85°C. Parameter variations with
operating voltage and/or temperature are shown in the
typical performance curves.
The input common-mode voltage range of the EL5211A
extends 500mV beyond the supply rails. The output swings
of the EL5211A typically extend to within 100mV of positive
and negative supply rails with load currents of 5mA.
Decreasing load currents will extend the output voltage
9
VS-
CIRCUIT 2
(Reference Circuit 2)
(Reference Circuit 2)
(Reference Circuit 2)
(Reference Circuit 1)
range even closer to the supply rails. Figure 27 shows the
input and output waveforms for the device in the unity-gain
configuration. Operation is from ±5V supply with a 1kΩ load
connected to GND. The input is a 10VP-P sinusoid. The
output voltage is approximately 9.8VP-P.
5V
10µs
VS=±5V
TA=25°C
AV=1
5V
VIN=10VP-P
FIGURE 27. OPERATION WITH RAIL-TO-RAIL INPUT AND
OUTPUT
Short Circuit Current Limit
The EL5211A will limit the short circuit current to ±110mA if
the output is directly shorted to the positive or the negative
supply. If an output is shorted indefinitely, the power
dissipation could easily increase such that the device may
be damaged. Maximum reliability is maintained if the output
FN6143.0
June 15, 2005
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