FEATURES
HIGH BANDWIDTH: 400MHz (G = +10)
LOW INPUT VOLTAGE NOISE: 1.2nV/√Hz
VERY LOW DISTORTION: –100dBc (5MHz)
HIGH SLEW RATE: 625V/μs
HIGH DC ACCURACY: VIO ±150μV
LOW SUPPLY CURRENT: 12.6mA
HIGH GAIN BANDWIDTH PRODUCT: 1750MHz
STABLE FOR GAINS ≥ 7

APPLICATIONS
HIGH DYNAMIC RANGE ADC PREAMPS
LOW-NOISE, WIDEBAND, TRANSIMPEDANCE
AMPLIFIERS
WIDEBAND, HIGH GAIN AMPLIFIERS
LOW-NOISE DIFFERENTIAL RECEIVERS
VDSL LINE RECEIVERS
ULTRASOUND CHANNEL AMPLIFIERS
SECURITY SENSOR FRONT ENDS
UPGRADE FOR THE OPA686, CLC425, AND
LMH6624

DESCRIPTION
The OPA846 combines very high gain bandwidth and large
signal performance with very low input voltage noise, while
dissipating a low 12.6mA supply current. The classical differential
input stage, along with two stages of forward gain and
a high power output stage, combine to make the OPA846 an
exceptionally low distortion amplifier with excellent DC accuracy
and output drive. The voltage-feedback architecture
allows all standard op amp applications to be implemented
with very high performance.
The combination of low input voltage and current noise,
along with a 1.75GHz gain bandwidth product, make the
OPA846 an ideal amplifier for wideband transimpedance
stages. As a voltage gain stage, the OPA846 is optimized for
a flat response at a gain of +10 and is stable down to a gain
of +7.
A new external compensation technique can be used to give
a very flat frequency response below the minimum stable
gain for the OPA846, further improving its already exceptional
distortion performance. Using this compensation makes
the OPA846 one of the premier 12- to 16-bit Analog-to-Digital
(A/D) converter input drivers. The supply current for the
OPA846 is precisely trimmed to 12.6mA at +25°C. This,
along with carefully defined supply current tempco in the
input and output stages, combine to provide exceptional
performance over the full specified temperature range.