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.