EL5144CW Intersil, EL5144CW Datasheet - Page 16

• Manufacturer Part Number: EL5144CW
• Description: IC AMP VFA SINGLE 100MH SOT23-5
• Manufacturer: Intersil

Specifications of EL5144CW

• Amplifier Type: Voltage Feedback
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 200 V/µs
• Gain Bandwidth Product: 60MHz
• -3db Bandwidth: 100MHz
• Current - Input Bias: 2nA
• Voltage - Input Offset: 25000µV
• Current - Supply: 7mA
• Current - Output / Channel: 120mA
• Voltage - Supply, Single/dual (±): 4.75 V ~ 5.25 V, ±2.38 V ~ 2.63 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pin Descriptions
Description of Operation and Applications
Information
Product Description
The EL5144 series is a family of wide bandwidth, single
supply, low power, rail-to-rail output, voltage feedback
operational amplifiers. The family includes single, dual, and
quad configurations. The singles and duals are available
with a power-down pin to reduce power to 2.6µA typically. All
the amplifiers are internally compensated for closed loop
feedback gains of +1 or greater. Larger gains are acceptable
but bandwidth will be reduced according to the familiar Gain
Bandwidth Product.
Connected in voltage follower mode and driving a high
impedance load, the EL5144 series has a -3dB bandwidth of
100MHz. Driving a 150Ω load, they have a -3dB bandwidth
of 60MHz while maintaining a 200V/µs slew rate. The input
common mode voltage range includes ground while the
output can swing rail-to-rail.
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high-frequency device, good printed circuit
board layout is necessary for optimum performance. Ground
plane construction is highly recommended. Lead lengths
should be as short as possible. The power supply pin must
be well bypassed to reduce the risk of oscillation For normal
single supply operation, where the GND pin is connected to
the ground plane, a single 4.7µF tantalum capacitor in
parallel with a 0.1µF ceramic capacitor from V
suffice. This same capacitor combination should be placed
at each supply pin to ground if split supplies are to be used.
In this case, the GND pin becomes the negative supply rail.
For good AC performance, parasitic capacitance should be
kept to a minimum. Use of wire wound resistors should be
avoided because of their additional series inductance. Use
of sockets, particularly for the SO package, should be
avoided if possible. Sockets add parasitic inductance and
capacitance that can result in compromised performance.
EL5144
SOT23
5 Ld
SO/PDIP
EL5146
8 Ld
1, 5
PDIP/MSOP
8 Ld SO/
EL5244
(Continued)
16
EL5246
MSOP
10 Ld
2
4
EL5144, EL5146, EL5244, EL5246, EL5444
SO/PDIP
EL5246
10, 12
14 Ld
2, 6,
3
5
S
to GND will
SO/PDIP
EL5444
14 Ld
EL5444
QSOP
16 Ld
NAME
Input, Output and Supply Voltage Range
The EL5144 series has been designed to operate with a
single supply voltage of 5V. Split supplies can be used so
long as their total range is 5V.
The amplifiers have an input common mode voltage range
that includes the negative supply (GND pin) and extends to
within 1.5V of the positive supply (V
specified over this range.
The output of the EL5144 series amplifiers can swing rail to
rail. As the load resistance becomes lower in value, the
ability to drive close to each rail is reduced. However, even
with an effective 150Ω load resistor connected to a voltage
halfway between the supply rails, the output will swing to
within 150mV of either rail.
Figure 48 shows the output of the EL5144 series amplifier
swinging rail to rail with R
Figure 49 is with R
CEA
CEB
NC
5V
0V
5V
0V
Enable Amplifier A
(Enabled when high)
Enable Amplifier B
(Enabled when high)
No Connect.
Not internally
connected.
FUNCTION
L
= 150Ω.
FIGURE 49.
FIGURE 48.
F
= 1kΩ, A
(Reference Circuit 3)
(Reference Circuit 3)
EQUIVALENT CIRCUIT
S
V
pin). They are
= +2 and R
L
March 31, 2011
= 1MΩ.
FN7177.2