1

LT1218/LT1219

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Rail-to-Rail Input and Output

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90

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High Common Mode Rejection Ratio: 97dB Min

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C-Load

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Wide Supply Range:

2V to

±15V (LT1218/LT1219)

2V to

±5V (LT1218L/LT1219L)

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Low Supply Current: 420

µA Max

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Low Input Bias Current: 18nA Typical

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300kHz Gain-Bandwidth Product (LT1218)

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Slew Rate: 0.10V/

µs (LT1218)

FEATURES

The LT

rail-to-rail input and output operation with precision speci-

fications. Unlike other rail-to-rail amplifiers, the LT1218/

LT1219’s input offset voltage is a low 90

µV across the

entire rail-to-rail input range, not just a portion of it. Using

a patented technique, both input stages of the LT1218/

LT1219 are trimmed: one at the negative supply and the

other at the positive supply. The resulting common mode

rejection of 97dB minimum is much better than other rail-

to-rail input op amps. A minimum open-loop gain of

500V/mV into a 10k load virtually eliminates all gain error.

The LT1218 has conventional compensation which

assures stability for capacitive loads of 1000pF or less.

The LT1219 has compensation that requires the use of a

0.1

µF output capacitor, which improves the amplifier’s

supply rejection and reduces output impedance at high

frequencies. The output capacitor’s filtering action also

reduces high frequency noise, which is beneficial when

driving A/D converters.

High and low voltage versions of the devices are offered.

Operation is specified for 3V, 5V and

±5V supplies for the

LT1218L/LT1219L and 3V, 5V and

±15V for the LT1218/

LT1219.

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Driving A/D Converters

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Test Equipment Amplifiers

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MUX Amplifiers

Precision Rail-to-Rail Input

and Output Op Amps

C-Load is a trademark of Linear Technology Corporation.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Voltage Follower Input to Output Error

MUX Amplifier

–

+

–

+

LT1218L

LT1218L

INPUT

SELECT

5V

5V

74HCO4

1218/19 • TA01

SHDN

MAXIMUM IN

TO OUT ERROR

= 110

µV FOR

0.05V

SHDN

INPUT VOLTAGE (V)

0

123

4

LT1218/19 • TA02

5

NO LOAD

10

1.0

0.1

0.01

0.05

4.95

MAX ERROR = 110

µV

0.05V