THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA

Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com

THAT 1240, 1243, 1246

FEATURES

·

High CMRR: typically 90dB at 60Hz

·

Wide bandwidth and high slew rate

·

Low distortion and low noise

·

Available in 0 dB, -3 dB, and -6 dB

versions

·

Pin compatible with SSM2143 and

INA137

APPLICATIONS

·

Balanced Audio Line Receivers

·

Summing Amplifiers

·

Differential Amplifiers

·

Current Shunt Monitors

·

Ground Loop Eliminator

Description

The THAT 124x series of precision differential

amplifiers are designed primarily for use as audio

balanced line receivers. Gains of 0 db, -3 dB, and

-6 dB are available to suit various applications re-

quirements.

The THAT 1246 is drop-in compatible with

the Burr-Brown INA137 and Analog Devices

SSM2143, while the THAT 1240 is drop-in com-

patible with the SSM2140.

All devices exhibit 90 dB of typical com-

mon-mode rejection, slew rates of 12 V/

ms, a

20MHz bandwidth, and 0.0006% THD. Both sur-

face-mount and DIP packages are available.

The THAT 124x family are laser-trimmed to

obtain the precision resistor matching needed for

high CMR performance. Fashioned in THAT Cor-

poration's proprietary dielectric isolation (DI)

process, the THAT 124x series provides the sonic

benefit of discrete designs, with the compact size,

reliability, matching, and thermal tracking of a

fully integrated solution.

Sense

Vout

Ref

Vcc

Vee

In+

In-

NC

Figure 1. THAT1240-series equivalent circuit diagram

Gain

Plastic DIP

Plastic SO

0 dB

1240P

1240S

-3 dB

1243P

1243S

-6 dB

1246P

1246S

Table 2. Ordering information

Pin Name

DIP Pin

SO Pin

Ref

1

1

In-

2

2

In+

3

3

Vee

4

4

Sense

5

5

Vout

6

6

Vcc

7

7

NC

8

8

Table 1. 1240 Series pin assignments

Balanced Line Receiver ICs