that2180a THAT Corporation, that2180a Datasheet

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that2180a

Manufacturer Part Number
that2180a
Description
Pre-trimmed Ic Voltage Controlled Amplifiers
Manufacturer
THAT Corporation
Datasheet
T H A T
trolled amplifiers (VCAs) are very high-performance
current-in/current-out
ing-polarity, voltage-sensitive control ports. They offer
wide-range exponential control of gain and attenuation
with low signal distortion. The parts are trimmed at
wafer
feedthrough without further adjustment.
Input
Gnd
·
·
·
·
·
·
·
THAT 2180 Series integrated-circuit voltage con-
1
6
COMPENSATION
BIAS CURRENT
Wide Dynamic Range: >120 dB
Wide Gain Range: >130 dB
Exponential (dB) Gain Control
Low Distortion: < 0.01 % (2180A)
Wide Gain-Bandwidth: 20 MHz
Dual Gain-Control Ports (pos/neg)
Pin-Compatible with 2150-Series
stage
Figure 1. 2180 Series Equivalent Circuit Diagram
for
FEATURES
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
low
C o r p o r a t i o n
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
devices
THD
and
with
control-voltage
two
Document 600029 Rev 01
oppos-
Description
MULTI-
PLIER
2k
Vbe
Iadj
Iset
mentary dielectric isolation process which offers
closely matched NPN/PNP pairs, to deliver discrete
performance at IC prices. The parts are available in
three grades, selected for factory trimmed distortion,
alowing the user to optimize cost vs. performance. The
2180 Series is available in an 8-pin single-in-line (SIP)
package.
25
The VCA design takes advantage of a fully comple-
Output
·
·
·
·
·
·
·
·
7
2
3
8
4
Sym
5
Vcc
Ec+
Ec-
V-
THAT 2180A, 2180B, 2180C
Faders
Panners
Compressors
Expanders
Equalizers
Filters
Oscillators
Automation System
Voltage Controlled Amplifiers
APPLICATIONS
Table 1. 2180 Series Pin Assignments
Max THD @1 V,
1 kHz, 0 dB
Pin Name
Table 2. Ordering Information
Output
0.01%
0.02%
0.05%
Input
Sym
Gnd
Ec+
Ec–
V–
V+
Pre-Trimmed IC
SIP Pin
2180LA
2180LB
2180LC
Plastic
SIP
1
2
3
4
5
6
8
7

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that2180a Summary of contents

Page 1

... BIAS CURRENT COMPENSATION Input 1 6 Gnd Figure 1. 2180 Series Equivalent Circuit Diagram THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Voltage Controlled Amplifiers THAT 2180A, 2180B, 2180C APPLICATIONS · Faders · ...

Page 2

... Voltage All specifications subject to change without notice. 2. Unless otherwise noted, T =25° THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com SPECIFICATIONS 1 +20 V Power Dissipation (P -20 V Operating Temperature Range (T ...

Page 3

... VCA IN 20k 10u Power Supplies Vcc = +15 V Vee = -15 V Figure 3. 2180 Series Frequency Response Vs. Gain THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com 2180A Conditions Min Typ Max Min — 0.005 0.010 — ...

Page 4

... Figure 5. Simplified Internal Circuit Diagram 3. For more details about the internal workings of the 2180 Series of VCAs, see An Improved Monolithic Volt- age-Controlled Amplifier, by Gary K. Hebert (Vice-President, Engineering, for THAT Corporation), presented at the 99th convention of the Audio Engineering Society, New York, Preprint number 4055. ...

Page 5

... The 2180-Series VCA design, fabrication and testing ensure extremely good audio performance when used as Figure 9. Representative DC Offset Vs. Gain THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com recommended. In particular, the 2180 maintains low distortion over a wide range of gain, cut and signal lev- els ...

Page 6

... Since the open-loop gain naturally falls off at high frequencies, asking for too much gain will lead to increased THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Applications high-frequency distortion ...

Page 7

... Vcc = +15 V Vee = -15 V Vee Ec+ Figure 14. Positive Control Port Using Pin 2 (Ec+) THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Negative Sense E (pin 3) is the negative voltage control port. This C- point controls gain inversely with applied voltage: posi- tive voltage causes loss, negative voltage causes gain ...

Page 8

... If the distortion diminishes, signal pickup in the control path is the likely cause. THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com THAT2180 Series IC VCAs Temperature Sensitivity ...

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