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FEATURES

HIGH BANDWIDTH: 260MHz (G = +5)

GAIN BANDWIDTH PRODUCT: 800MHz

LOW INPUT VOLTAGE NOISE: 2.0nV/√Hz

VERY LOW DISTORTION: –96dBc (5MHz)

HIGH OPEN-LOOP GAIN: 110dB

FAST 12-BIT SETTLING: 10.5ns (0.01%)

LOW INPUT OFFSET VOLTAGE: 300μV

OUTPUT CURRENT: ±100mA

APPLICATIONS

ADC/DAC BUFFER AMPLIFIER

LOW DISTORTION “IF” AMPLIFIER

ACTIVE FILTERS

LOW-NOISE RECEIVER

WIDEBAND TRANSIMPEDANCE

TEST INSTRUMENTATION

PROFESSIONAL AUDIO

OPA643 UPGRADE

DESCRIPTION

The OPA843 provides a level of speed and dynamic range

previously unattainable in a monolithic op amp. Using a high

Gain Bandwidth (GBW), two gain-stage design, the OPA843

gives a medium gain range device with exceptional dynamic

range. The “classic” differential input complements this high

dynamic range with DC precision beyond most high-speed

amplifier products. Very low input offset voltage and current,

high Common-Mode Rejection Ratio (CMRR) and Power-

Supply Rejection Ratio (PSRR), and high open-loop gain

combine to give a high DC precision amplifier along with low

noise and high 3rd-order intercept.

12- to 16-bit converter interfaces will benefit from this combination

of features. High-speed transimpedance applications

can be implemented with exceptional DC precision as well.

Differential configurations using two OPA843s can deliver

very low distortion to high output voltages, as shown below.