THAT1420 ETC [List of Unclassifed Manufacturers], THAT1420 Datasheet

THAT1420

Manufacturer Part Number

THAT1420

Description

Balanced Line Drivers

Manufacturer

ETC [List of Unclassifed Manufacturers]

Datasheet

1.THAT1420.pdf (8 pages)

Current page: 1 of 8
Download datasheet (123Kb)

T H A T

Vcc

Gnd

In+

Vee

1. See Gary Hebert’s paper, An Improved Balanced, Floating Output Driver IC, presented at the 108th AES Convention, Feb. 2000

tion of audio differential line drivers with im-

proved

cross-coupled monolithic designs. Both models

exhibit low noise and distortion, high slew rate,

stability under difficult loads, wide output swing,

and have outputs which are short-circuit pro-

tected.

OutSmartsÔ technology, a dual feedback-loop de-

sign that prevents the excessive ground currents

typical of cross-coupled output stages (CCOS)

when clipping into single-ended loads

and 1430 use two individual negative-feedback

loops to separately control the differential output

voltage and common mode output currents, mak-

Figure 1. THAT 1420 Equivalent Circuit Diagram

The THAT 1420 and 1430 are a new genera-

In addition both models incorporate patented

To overcome this problem, the THAT 1420

OutSmartsÔ technology tames

clipping behavior into single-ended

loads

Pin-compatible with SSM2142

Balanced, floating output delivers

transformer-like behavior

Stable when driving long cables

and capacitive loads

THAT 1430 delivers low output

offset voltage using single capacitor

Din+

Cin+

Cin-

Din-

performance

FEATURES

10k

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

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

C o r p o r a t i o n

Dout-

Dout+

10k

over

10k

THAT 1420

10p

20k

conventional

Out-

Sens+

Sens-

Out+

Description

EXT

ing the design inherently more stable and less

sensitive to component tolerances than the CCOS.

Most importantly, the dual-feedback design pre-

vents the loss of common-mode feedback that

plagues the CCOS designs, avoiding the excessive

ground currents and overly-distorted output

waveform that can result when driving sin-

gle-ended loads.

minimum parts count is desired, the THAT 1430

further improves over existing designs. In con-

ventional CCOS circuits, two relatively high-value

electrolytic capacitors are required to reduce the

offset voltage. By contrast, the THAT 1430 topol-

ogy requires only a resistor and a single film or

ceramic capacitor to achieve the same effect at

lower parts count and price.

Number

DIP Pin

Where minimum output offset voltage with

Differential Line Driver

Audio Mix Consoles

Distribution Amplifiers

Audio Equalizers

Dynamic Range Processors

Digital Effects Processors

Telecommunications Systems

Instrumentation

Hi-Fi Equipment

Table 1. THAT 1420/1430 pin assignments

OutSmartsä Balanced Line Drivers

APPLICATIONS

Number

SO Pin

THAT 1420, 1430

1420 Pin

Name

Sens+

Sens-

Out+

Out-

Gnd

Vee

Vcc

1430 Pin

Name

Cap2

Cap1

Out+

Out-

Gnd

Vee

Vcc

Related parts for THAT1420

THAT1420 Summary of contents

Page 1

FEATURES · OutSmartsÔ technology tames clipping behavior into single-ended loads · Pin-compatible with SSM2142 · Balanced, floating output delivers transformer-like behavior · Stable when driving ...

... O RMS L Bal. Mode, 20 kHz BW 0.1% THD+N R =600W, w/o Sense capacitors L R =600W, w/ Sense capacitors L R =600W, w/o Sense capacitor L R =600W, w/ Sense capacitor L THAT1420/1430 Balanced Line Driver Preliminary Information = 25° -40 to +85° -40 to +150° 150°C J )(Soldering 60 sec) 300°C LEAD 3 Min. ...

Page 3

Rev. 4/24/01 Preliminary Information Electrical Characteristics (cont’d.) Parameter Symbol Differential Output Offset V OOD Differential Output Voltage Swing,Pos Differential Output Voltage Swing,Neg Output Impedance Z O Quiescent Supply Current I S Short Circuit Output Current I SC Voltage Supply Range ...

Page 4

... Since this is negative feedback, the common-mode loop can raise the effective output impedance at audio fre- quencies without the side effects of circuits that use positive feedback to implement this function. THAT1420/1430 Balanced Line Driver Preliminary Information THAT 1430 50 Out- ...

Page 5

... Sens+ In Out+ 3 Out- Gnd Sens- 1 Vee U1 THAT1420 C5 100n VEE Circuit implementations using 1420/1430 are relatively straightforward. solid ground reference, stiff voltage supplies, and ad- equate supply bypassing are all that is required to achieve excellent performance out of both ICs. Both devices are stable into any capacitive load, and the maximum capacitance is limited only by slew rate and frequency response considerations ...

Page 6

... These line drivers can easily drive cables hun- dreds of feet in length without becoming unstable, but attaching such a long cable can act as an antenna (even for AM stations) which can pick up RFI and di- rect it into the circuit. C3 and C8 are 100pF capaci- THAT1420/1430 Balanced Line Driver Preliminary Information C6 100n Out ...

Page 7

... Sens+ In Out+ Out- 3 Gnd Sens- U1 Vee THAT1420 10u C5 100n VEE Figure 6. 1420 with output common mode offset protection, RFI protection, and surge protection tors whose purpose is to redirect this RF energy to the chassis before it can circulate and effectively form a single loop transformer that magnetically couples RF into the remainder of the circuit ...

Page 8

... Page 8 The THAT1420/1430 are available in both 8-pin mini-DIP and 16-pin SOIC packages. The package ITEM MILLIMETERS INCHES A 9.52 0.10 0.375 ± ±0.004 B 6.35 0.10 0.250 0.004 ± ± C 7.49/8.13 0.295/0.320 D 0.46 0.018 E 2.54 0.100 3.68/4.32 0.145/0.170 F G 0.25 0.010 H 3.18 0.10 0.125 0.004 ± ± ...

Related keywords

THAT1420 datasheet
THAT1420 data sheet
THAT1420 pdf datasheet
THAT1420 component
THAT1420 part
THAT1420 distributor
THAT1420 RoHS
THAT1420 datasheet download