1203S datasheet, PDF - EEWORLD Datasheet

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1203S: DescriptionInGenius High-CMRR Balanced Input Line Receiver; File Size155KB，10 Pages; ManufacturerETC1

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InGenius High-CMRR Balanced Input Line Receiver

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T H AT

Corporation

FEATURES

High common-mode rejection

(typical 90 dB at 60 Hz) maintained

under real-world conditions

Excellent solution for hum and

groundloop suppression

Transformer-like noise rejection in

an 8-pin IC, at fraction of

transformer cost and size

InGenius

High-CMRR

Balanced Input Line Receiver

THAT

1200, 1203, 1206

APPLICATIONS

Balanced input stages

Summing amplifiers

Transformer front-end

replacements

ADC front-ends

Description

The THAT 1200 series of

InGenius

balanced

line receivers are designed to overcome a serious

limitation of conventional balanced input stages

— notoriously poor common mode rejection in

real world applications. While conventional input

stages may exhibit good rejection characteristics

in the lab and on paper, they perform poorly

when fed from even slightly unbalanced source

impedances — a common situation in almost any

pro sound environment.

Developed by Bill Whitlock of Jensen Trans-

formers, the patented

InGenius

input stage uses a

unique bootstrap circuit to raise its common-

mode input impedance into the megohm range,

but without the noise penalty that comes from

high-valued resistors. InGenius line receivers

maintain their high CMRR over a wide range of

source impedance imbalances — even when fed

from single-ended sources.

Pin Name

DIP Pin

SO Pin

OA1

IN-

Ref

Vcc

Vee

Vout

In-

In+

Vee

CM In

Vout

Vcc

OA4

OA3

IN+

OA2 Rd

CM Out

REF

Table 1. 1200-series pin assignments

Gain

0 dB

Plastic DIP

1200P

1203P

1206P

Plastic SO

1200S

1203S

1206S

CM IN

CM OUT

-3 dB

-6 dB

Figure 1. THAT1200-series equivalent circuit diagram

Table 2. Ordering information

Protected under U.S. Patent No. 5,568,561 and other patents pending.

InGenius

is a trademark of THAT Corporation.

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

600033 Rev 0A

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

1203S Related Products

	1203S	1200P	1200S	1203P	1206P	1206S	THAT1200	THAT1203	THAT1206
Description	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver	InGenius High-CMRR Balanced Input Line Receiver

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