THAT2181 Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – Trimmable IC Voltage Controlled Amplifiers

T H AT Corporation
FEATURES
· Wide Dynamic Range: >120 dB
· Wide Gain Range: >130 dB
· Exponential (dB) Gain Control
· Low Distortion:
~0.0025% (typical 2181A)
~0.005% (typical 2181C)
· Wide Gain-Bandwidth: 20 MHz
· Dual Gain-Control Ports (pos/neg)
· Pin-Compatible with 2150-Series
Trimmable IC
Voltage Controlled Amplifiers
THAT 2181A, 2181B, 2181C
APPLICATIONS
· Faders
· Panners
· Compressors
· Expanders
· Equalizers
· Filters
· Oscillators
· Automation Systems
Description
THAT 2181 Series integrated-circuit voltage con-
trolled amplifiers (VCAs) are very high-performance
current-in/current-out devices with two oppos-
ing-polarity, voltage-sensitive control ports. They offer
wide-range exponential control of gain and attenuation
with low signal distortion. The parts are selected after
packaging based primarily on after-trim THD and con-
trol-voltage feedthrough performance.
The VCA design takes advantage of a fully comple-
mentary dielectric isolation process which offers
closely matched NPN/PNP pairs. This delivers perfor-
mance unobtainable through any conventional pro-
cess, integrated or discrete. The parts are available in
three grades, allowing the user to optimize cost vs.
performance. Both 8-pin single-in-line (SIP) and sur-
face mount (SO) packages are available.
BIAS CURRENT
COMPENSATION
Input
1
6
Gnd
7
2k
Vcc
Vbe
MULTI-
PLIER
2
Ec+
25
Ec-
3
8
Output
4
Sym
Iadj
V-
5
Iset
Figure 1. 2181 Series Equivalent Circuit Diagram
Pin Name
Input
SIP Pin
1
SO Pin
1
Ec+
Ec–
Sym
2
2
3
3
4
4
V–
5
5
Gnd
6
6
V+
7
7
Output
8
8
Table 1. 2181 Series Pin Assignments
Max Trimmed THD Plastic Plastic
@1 V, 1 kHz, 0 dB SIP
SO
0.005%
2181LA 2181SA
0.008%
2181LB 2181SB
0.02%
2181LC 2181SC
Table 2. Ordering Information
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com
Document 600030 Rev 01