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.