7

®

OPA4243

LARGE-SIGNAL STEP RESPONSE

(V

50

µs/div

SMALL-SIGNAL STEP RESPONSE

(V

10

µs/div

APPLICATION INFORMATION

The OPA4243 is unity-gain stable and suitable for a wide

range of general-purpose applications. The power supply

pins should be bypassed with 0.01

µF ceramic capacitors.

OPERATING VOLTAGE

The OPA4243 can operate from single supply (2.2V to 36V)

or dual supplies (

±1.1V to ±18V) with excellent perfor-

mance. Unlike most op amps which are specified at only one

supply voltage, the OPA4243 is specified for real world

applications; a single set of specifications applies through-

out the 2.6V to 36V supply range. This allows the designer

to have the same assured performance at any supply voltage

within this range.

In addition, many key parameters are guaranteed over the

specified temperature range, –40

°C to +85°C. Most behav-

iors remain unchanged throughout the full operating voltage

range. Parameters, which vary significantly with operating

voltage or temperature, are shown in the typical perfor-

mance curves.

PRINTED CIRCUIT BOARD LAYOUT

See Burr-Brown Application Note AB-132 for specific PC

board layout recommendations.

INPUT PROTECTION

Rail-to-rail input signals will not cause damage or invert the

output of the OPA4243. To protect against ESD and exces-

sive input voltage (beyond the supply rails) the OPA4243

includes diodes from the input terminals to the power supply

rails. Normally, these diodes are reversed biased and have

negligible effect on circuit operation. However, if the input

voltage is allowed to exceed the supply voltages by enough

to forward bias these diodes (generally, 0.3V to 0.6V)

excessive input current could flow. If this condition could

occur (for example, if an input signal is applied when the op

amp supply voltage is zero), care should be taken to limit the

input current to less than 10mA to avoid damage. An input

signal beyond the supplies, with power applied, can cause an

unexpected output inversion.