THAT2180B ETC1 [List of Unclassifed Manufacturers], THAT2180B Datasheet

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THAT2180B

Manufacturer Part Number
THAT2180B
Description
Pre-Trimmed IC Voltage Controlled Amplifiers
Manufacturer
ETC1 [List of Unclassifed Manufacturers]
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
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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THAT2180B Summary of contents

Page 1

FEATURES · Wide Dynamic Range: >120 dB · Wide Gain Range: >130 dB · Exponential (dB) Gain Control · Low Distortion: < 0.01 % (2180A) ...

Page 2

Page 2 Absolute -Maximum Ratings (T Positive Supply Voltage ( Negative Supply Voltage ( Supply Current ( Max Recommended Operating Conditions Parameter Symbol Positive Supply Voltage ...

Page 3

Rev 01 Electrical Characteristics (Cont'd.) Parameter Symbol Total Harmonic Distortion THD 1 kHz, No External Trim dBV gain +10 dBV, -15 dB gain dBV, +15 dB gain ...

Page 4

Page 4 The THAT 2180 Series VCAs are designed for high performance in audio-frequency applications requiring exponential gain control, low distortion, wide dynamic range and low control-voltage feedthrough. These parts control gain by converting an input current signal to a ...

Page 5

Rev 01 Figure 8 shows the effect of temperature on the nega- tive control port. (The positive control port behaves in the same manner.) Note that the gain dB, re- gardless of ...

Page 6

Page 6 Input As mentioned above, input and output signals are currents, not voltages. While this often causes some con- ceptual difficulty for designers first exposed to this con- vention, the current input/output mode provides great flexibility in application. The ...

Page 7

Rev 01 ply voltage. The lowest permissible supply voltage is de- termined by the sum of the input and output currents plus I , which must be supplied through the output SET of the internal transconductance amplifier and down ...

Page 8

Page 8 Noise Considerations It is second nature among good audio designers to con- sider the effects of noisy devices on the signal path well known, this includes not only active devices such as opamps and transistors, but ...

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