el5211a Intersil Corporation, el5211a Datasheet - Page 9

• Manufacturer Part Number: el5211a
• Description: 60mhz Rail-to-rail Input-output Op Amp
• Manufacturer: Intersil Corporation

Pin Descriptions
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” on page 4.
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
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
VOUTB
VOUTA
VINA+
VINB+
VINA-
VINB-
VS+
VS-
9
Amplifier A output
Amplifier A inverting input
Amplifier A non-inverting input
Negative power supply
Amplifier B non-inverting input
Amplifier B inverting input
Amplifier B output
Positive power supply
FUNCTION
EL5211A
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 10V
output voltage is approximately 9.8V
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 continuous
current never exceeds ±65mA. This limit is set by the design of
the internal metal interconnects.
FIGURE 27. OPERATION WITH RAIL-TO-RAIL INPUT AND
(Reference Circuit 2)
(Reference Circuit 2)
(Reference Circuit 2)
(Reference Circuit 1)
5V
5V
OUTPUT
EQUIVALENT CIRCUIT
GND
CIRCUIT 1
CIRCUIT 2
10µs
P-P
V
T
A
V
P-P
A
V
S
IN
.
= +25°C
= 1
= ±5V
= 10V
sinusoid. The
V
V
S+
S-
P-
V
V
S+
S-
April 24, 2007
FN6143.1