FEATURES

APPLICATIONS

AMPLIFIERS

DESCRIPTION

The OPA2846 provides two very low-noise, high gain

bandwidth, voltage-feedback op amps in a single

package. Operating from a low 12.6mA/channel quiescent

current, each channel provides a 1.2nV/

√Hz input voltage

noise with a 1.65GHz gain bandwidth product. Minimum

stable gain is specified at +7V/V while exceptional flatness

is ensured at a gain of +10V/V.

The combination of low noise, high slew rate (600V/

µs)

and broad bandwidth allow very high SFDR differential

receivers to be implemented. Additionally, decompen-

sated, low-noise, voltage-feedback op amps are ideal for

broadband transimpedance requirements. The dual chan-

nel OPA2846 provides matched channels for high-speed

transimpedance requirements. With over 200MHz band-

width at a gain of 20dB, excellent gain and phase matching

are provided at IF frequencies for matched I and Q channel

amplifiers.

OPA2846 RELATED PRODUCTS

SINGLES

INPUT NOISE

VOLTAGE (nV/

√Hz)

GAIN BANDWIDTH

PRODUCT (MHz)

OPA842

2.6

200

OPA843

2.0

800

OPA846

1.2

1750

OPA847

0.85

3900

Differential, 14-Bit, ADC Driver

Single−to−Differential

Gain of 10

Power−supply decoup ling

not sho wn.

1/2

OP A28 46

L

+5V

L

R

1

R

1

R

2

R

2

C

V

−

V+

14−Bit

10MSPS

ADS850

2.1pF

1/2

OP A2 84 6

500

Ω

−5V

18pF

1000pF

1000pF

18p F

0.1

µF

100

Ω

100

Ω

100

Ω

500

Ω

2.1pF

C

1

V

I

50

Ω

1:2

100

Ω

V

CM

−80

−85

−90

−95

−100

−105

−110

Frequency (MHz)

110

V

3rd−Harmonic

2nd−Harmonic

OPA2846

SBOS274A −JUNE 2003 − REVISED MARCH 2004

Dual, Wideband, Low-Noise, Voltage-Feedback

Operational Amplifier

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

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 2003-2004, Texas Instruments Incorporated

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