OPA363IDBVR datasheet(8/27 Pages) TI

8 / 27 page

OPA363, 2363, 364, 2364, 4364

SBOS259B

www.ti.com

APPLICATIONS INFORMATION

The OPA363 and OPA364 series op amps are rail-to-rail

operational amplifiers with excellent CMRR, low noise, low

offset, and wide bandwidth on supply voltages as low as

±0.9V. The OPA363 features an additional pin for shutdown/

enable function. These families do not exhibit phase reversal

and are unity-gain stable. Specified over the industrial tem-

perature range of –40

°C to +125°C, the OPA363 and OPA364

families offer precision performance for a wide range of

applications.

RAIL-TO-RAIL INPUT

The OPA363 and OPA364 feature excellent rail-to-rail opera-

tion, with supply voltages as low as

±0.9V. The input com-

mon-mode voltage range of the OPA363 and OPA364 family

extends 100mV beyond supply rails. The unique input topol-

ogy of the OPA363 and OPA364 eliminates the input offset

transition region typical of most rail-to-rail complimentary

stage operational amplifiers, allowing the OPA363 and

OPA364 to provide superior common-mode performance

over the entire common-mode input range, as seen in Figure 1.

This feature prevents degradation of the differential linearity

error and THD when driving A/D converters. A simplified

schematic of the OPA363 and OPA364 is shown in Figure 2.

OPERATING VOLTAGE

The OPA363 and OPA364 series op amp parameters are fully

specified from +1.8V to +5.5V. Single 0.1

µF bypass capaci-

tors should be placed across supply pins and as close to the

part as possible. Supply voltages higher than 5.5V (absolute

maximum) may cause permanent damage to the amplifier.

Many specifications apply from –40

°C to +125°C. Parameters

that vary significantly with operating voltages or temperature

are shown in the Typical Characteristics.

FIGURE 1. OPA363 and OPA364 have Linear Offset Over

Entire Common-Mode Range.

FIGURE 2. Simplified Schematic.

TYPICAL CHARACTERISTICS (Cont.)

At TCASE = +25°C, RL = 10kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2, unless otherwise noted.

SMALL-SIGNAL STEP RESPONSE

L = 100pF)

250ns/div

LARGE-SIGNAL STEP RESPONSE

L = 100pF)

µs/div

Common-Mode Voltage (V)

–0.2

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

1.0

0.5

–0.5

–1.0

–1.5

–2.0

–2.5

–3.0

–3.5

Competitors

OPA363 and OPA364

Regulated

Charge Pump

OUT = VCC +1.8V

Patent Pending

Very Low Ripple

Topology

BIAS

CC + 1.8V

BIAS

OUT

IN–

IN+

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