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EL5111T

60MHz Rail-to-Rail Input-Output Operational Amplifier

Renesas Electronics 

EL5111T

Applications Information

Product Description

The EL5111T is a high voltage rail-to-rail input-output

amplifier with low power consumption. The EL5111T is

a single amplifier which exhibits beyond the rail input

capability, rail-to-rail output capability, and is unity gain

stable.

The EL5111T features a high slew rate of 100V/µs, and

fast settling time. Also, the device provides common

mode input capability beyond the supply rails,

rail-to-rail output capability, and a bandwidth of 60MHz

(-3dB). This enables the amplifier to offer maximum

dynamic range at any supply voltage.

Operating Voltage, Input and Output

Capability

The EL5111T can operate on a single supply or dual

supply configuration. The EL5111T operating voltage

ranges from a minimum of 4.5V to a maximum of 19V.

This range allows for a standard 5V (or ±2.5V) supply

voltage to dip to -10%, or a standard 18V (or ±9V) to

rise by +5.5% without affecting performance or

reliability.

The input common-mode voltage range of the EL5111T

extends 500mV beyond the supply rails. Also, the

EL5111T is immune to phase reversal. However, if the

common mode input voltage exceeds the supply

voltage by more than 0.5V, electrostatic protection

diodes in the input stage of the device begin to

conduct. Even though phase reversal will not occur, to

maintain optimal reliability it is suggested to avoid

input overvoltage conditions. Figure 30 shows the input

voltage driven 500mV beyond the supply rails and the

device output swinging between the supply rails.

The EL5111T output typically swings to within 50mV of

positive and negative supply rails with load currents of

±5mA. Decreasing load currents will extend the output

voltage range even closer to the supply rails. Figure 31

shows the input and output waveforms for the device

in a unity-gain configuration. Operation is from ±5V

supply with a 1k load connected to GND. The input is

a 10VP-P sinusoid and the output voltage is

approximately 9.9VP-P.

Refer to the “Electrical Specifications” Table beginning

on page 3 for specific device parameters. Parameter

variations with operating voltage, loading and/or

temperature are shown in the “Typical Performance

Curves” on page 6.

VS = ±2.5V, TA = +25°C, AV = 1, VINx = 6VP-P,

RL = 1kto GND

OUTPUT

INPUT

10µs/DIV

FIGURE 30. OPERATION WITH BEYOND-THE-RAILS

INPUT

VS = ±5V, TA = +25°C, AV = 1, VINx = 10VP-P,

RL = 1kto GND

10µs/DIV

FIGURE 31. OPERATION WITH RAIL-TO-RAIL INPUT

AND OUTPUT

Output Current

The EL5111T is capable of output short circuit currents

of 300mA (source and sink), and the device has

built-in protection circuitry which limits the output

current to ±300mA (typical).

To maintain maximum reliability, the continuous output

current should never exceed ±70mA. This ±70mA limit

is determined by the characteristics of the internal

metal interconnects. Also, see “Power Dissipation” on

page 12 for detailed information on ensuring proper

device operation and reliability for temperature and

load conditions.

Thermal Shutdown

The EL5111T has a built-in thermal protection which

ensures safe operation and prevents internal damage

to the device due to overheating. When the die

temperature reaches +165°C (typical) the device

automatically shuts OFF the output by putting it in a

high impedance state. When the die cools by +15°C

(typical) the device automatically turns ON the output

by putting it in a low impedance (normal) operating

state.

FN6894 Rev 0.00

May 27, 2010

Page 11 of 14

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