1646 データシートの表示（PDF） - THAT Corporation

部品番号

コンポーネント説明

メーカー

1646

Balanced Line Driver ICs

THAT Corporation 

T H AT Corporation

FEATURES

• Balanced, transformer-like floating

output

• OutSmarts® technology improves

clipping into single-ended loads

• Stable driving long cables and

capacitive loads

• High output: 18Vrms into 600 W

• Low noise: -101 dBu

• Low distortion: 0.0007% @ 1kHz

• Industry-standard pinout

Balanced Line Driver ICs

THAT 1606, 1646

APPLICATIONS

• Differential Line Drivers

• Audio Mixing Consoles

• Distribution Amplifiers

• Hi-Fi Equipment

• Audio Equalizers

• Dynamic Range Processors

• Digital Effects Processors

• Telecommunications Systems

• Instrumentation

Description

The THAT 1606 and 1646 are a new generation

of monolithic audio differential line drivers offering

improved performance over conventional cross-cou-

pled designs. Based on a high-performance, fully dif-

ferential opamp and laser-trimmed thin-film

resistors, both families exhibit low noise and distor-

tion, high slew rate, and wide output swing. The

parts are stable when driving difficult loads, and

have short-circuit protected outputs.

Designed from the ground up in THAT's comple-

mentary dielectric isolation process, both models in-

corporate THAT's patented OutSmarts1 technology.

This is a dual feedback-loop design that prevents the

excessive ground currents typical of cross-coupled

output stages (CCOS) when clipping into sin-

gle-ended loads. OutSmarts uses two individual neg-

ative-feedback loops to separately control the

differential output voltage and common mode output

currents, making the designs inherently more stable

and less sensitive to component tolerances than

common CCOSes. As a result, THAT's topology pre-

vents the loss of common-mode feedback that

plagues common CCOS designs when clipping into

single-ended loads. This avoids excessive ground

currents that would otherwise upset power supplies

and create additional distortion, even in adjacent

channels.

The 1646 is pin-compatible with the TI DRV134

and DRV135, as well as the Analog Devices

SSM2142. The 1606 offers an advanced com-

mon-mode offset voltage reduction scheme, which re-

quires a small single capacitor instead of the two

electrolytics required by the 1646 and its

pin-compatible cousins. Additionally, the 1606 fea-

tures differential inputs in a space-saving 16-pin

QSOP package. Both parts offer +6 dB gain.

10k

Vcc

5k

Din+

In+

Cin+

10k

Dout-

Cin- AD & A C

Gnd

5k

Din-

Dout+

10k

10k

Vee

THAT 1646

25

Out-

Sns-

10k

20k

10p

CEXT

10k

20k

Sns+

25

CEXT

Out+

Figure 1. THAT 1646 Equivalent Circuit Diagram

1646

1606

Pin

DIP8

SO8

SO16W QSOP16

1

Out-

Out-

NC

Gnd*

2

Sns-

Sns-

NC

NC

3

Gnd

Gnd

Out-

Out-

4

In

In

Sns-

Cap1

5

Vee

Vee

Gnd

Gnd

6

Vcc

Vcc

In

In-

7

Sns+

Sns+

NC

In+

8

Out+

Out+

NC

Gnd*

9

—

—

NC

Gnd*

10

—

—

NC

NC

11

—

—

Vee

Vee

12

—

—

Vcc

Vcc

13

—

—

Sns+

Cap2

14

—

—

Out+

Out+

15

—

—

NC

NC

16

—

—

NC

Gnd*

* See “Thermal Considerations” section on page 10

Table 1. THAT 1606/1646 pin assignments

1. For complete details of OutSmarts, see Hebert, Gary K., "An Improved Balanced, Floating Output Driver IC", presented at the 108th AES Convention, February 2000.

Protected under US Patents numbers 4,979,218 and 6,316,970. Additional patents pending. THAT and OutSmarts are registered trademarks 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

Copyright © 2011, THAT Corporation; Document 600078 Rev. 05

Share Link: