THAT1430 That, THAT1430 Datasheet

no-image

THAT1430

Manufacturer Part Number
THAT1430
Description
(THAT1420 / THAT1430) Balanced Line Drivers
Manufacturer
That
Datasheet
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
5k
5k
Din+
Cin+
Cin-
Din-
performance
FEATURES
A
10k
D
10k
&
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
A
C
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
10k
over
10k
10k
50
50
THAT 1420
10p
20k
20k
conventional
1
.
Out-
Sens+
Sens-
Out+
Description
C
C
EXT
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
1
2
3
4
5
6
7
8
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
11
12
13
14
3
4
5
6
THAT 1420, 1430
1420 Pin
Name
Sens+
Sens-
Out+
Out-
Gnd
Vee
Vcc
In
1430 Pin
Name
Cap2
Cap1
Out+
Out-
Gnd
Vee
Vcc
In

Related parts for THAT1430

THAT1430 Summary of contents

Page 1

... Figure 1. THAT 1420 Equivalent Circuit Diagram 1. See Gary Hebert’s paper, An Improved Balanced, Floating Output Driver IC, presented at the 108th AES Convention, Feb. 2000 THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com OutSmartsä Balanced Line Drivers APPLICATIONS · ...

Page 2

... OCM THAT1420 V OCM Output Common Mode Voltage Offset V OCM THAT1430 V OCM 2. All specifications are subject to change without notice. 3. All measurements taken with V =±18, T=25°C, unless otherwise noted S THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com ...

Page 3

... Figures 2 and 3 show the gain core common to both the THAT 1420 and 1430. The gain core is a single amplifier that includes two differential input pairs, C and D ...

Page 4

... If we start with that assump- tion, we can intuitively discern the operation of the common-mode feedback loop as follows: Referring again to Figures 2 and 3, the com- ...

Page 5

... As an example, one manufacturer supplies a shielded, twisted pair with 30pF/ft of inter-conductor capacitance and 25pF/ft of conductor to shield capac- 4. Copyright ã 1991 Rane 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 2 In- 3 In+ Figure 4. Basic THAT 1420 applications circuit ...

Page 6

... Out- Gnd Cap2 1 Vee U1 THAT1430 C5 100n Vee Figure 5. Basic THAT 1430 application circuit with output common mode offset reduction tual worst case peak level for various types of music and speech will be flat out to 5kHz, and roll off at 6dB/octave above this frequency. Thus the peak lev- els at 20kHz will be 12dB below those at 5kHz ...

Page 7

... The integrated balanced line driver is one of those highly useful, cost-effective functional blocks that can provide significant improvement over discrete de- signs. The THAT 1420 and 1430 go a step or two further by improving over existing components. Both incorporate OutSmartsä technology to tame the ab- errant single-ended clipping behavior of conventional cross-coupled output stages ...

Page 8

... K ± ± Figure 7. -P (DIP) version package outline drawing THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com Package Information dimensions are shown in Figures 7 and 8, while pinouts are given in Table ...

Related keywords