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THAT1203

更新时间： 2024-11-28 22:19:47

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
10页	158K
描述
InGenius High-CMRR Balanced Input Line Receiver

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THAT1203 数据手册

InGenius High-CMRR

Balanced Input Line Receiver

T H A T C o r p o r a t i o n

THAT 1200, 1203, 1206

FEATURES

APPLICATIONS

High common-mode rejection

(typical 90 dB at 60 Hz) maintained

under real-world conditions

Balanced input stages

Summing amplifiers

Transformer front-end

replacements

Excellent solution for hum and

groundloop suppression

ADC front-ends

Transformer-like noise rejection in

an 8-pin IC, at fraction of

transformer cost and size

Description

The THAT 1200 series of InGenius balanced

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.

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.

Pin Name

Ref

DIP Pin

SO Pin

OA1

In-

IN-

IN+

Vcc

Vee

In+

Vee

OA4

OA3

CM In

Vout

Vcc

Vout

OA2

CM Out

REF

Table 1. 1200-series pin assignments

Gain

0 dB

Plastic DIP

1200P

Plastic SO

1200S

CM IN

CM OUT

-3 dB

-6 dB

1203P

1203S

1206P

1206S

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

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

600033 Rev 0A

12 3 4 5 6 7...10

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