FEATURES

− Slew Rate: 50V/

µs

− Gain Bandwidth: 180MHz

− Balanced Input and Output Converts

Single-Ended Input to

Balanced

Differential Output

APPLICATIONS

DESCRIPTION

The OPA1632 is a fully-differential amplifier designed

for driving high-performance audio analog-to-digital

converters (ADCs). It provides the highest audio quality,

with very low noise and output drive characteristics

optimized for this application. The OPA1632’s excellent

gain bandwidth of 180MHz and very fast slew rate of

50V/

µs produce exceptionally low distortion. Very low

input noise of 1.3nV/

√Hz further ensures maximum

signal-to-noise ratio and dynamic range.

The flexibility of the fully differential architecture allows

for

easy

implementation

of

a

single-ended

to

fully-differential output conversion. Differential output

reduces

even-order

harmonics

and

minimizes

common-mode noise interference. The OPA1632

provides excellent performance when used to drive

high-performance audio ADCs such as the PCM1804.

A shutdown feature also enhances the flexibility of this

amplifier.

The OPA1632 is available in an SO-8 package and a

thermally-enhanced MSOP-8 PowerPAD

 package.

RELATED DEVICES

OPAx134

High-Performance Audio Amplifiers

OPA627/637

Precision High-Speed DiFET Amplifiers

OPAx227/x228

Low-Noise Bipolar Amplifiers

Typical ADC Circuit

THD + NOISE vs FREQUENCY

1000

10

100

10k

100k

Frequency (Hz)

0.001

0.0001

0.00001

Gain = +1

R

V

Differential I/O

R

R

+15V

Digital

Output

−15V

V

OCM

V

COM

V

IN+

V

IN

−

V

V

PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.

OPA1632

SBOS286A − DECEMBER 2003 − REVISED SEPTEMBER 2006

High-Performance, Fully-Differential

AUDIO OP AMP

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.

www.ti.com

Copyright

 2003−2006, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.