FEATURES
• Wide Dynamic Range: >120 dB • Wide Gain Range: >130 dB • Exponential (dB) Gain Control • Low Distortion: < 0....
FEATURES
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
Blackmer® Pre-Trimmed IC Voltage Controlled Amplifiers
THAT 2180A, 2180B, 2180C
APPLICATIONS
Faders Panners Compressors Expanders Equalizers Filters Oscillators Automation Systems
Description
THAT 2180 Series integrated-circuit voltage controlled amplifiers (VCAs) are very highperformance current-in/current-out devices with two opposing-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 stage for low THD and control-voltage feedthrough without further adjustment.
The VCA design takes advantage of a fully complementary 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, allowing the user to optimize cost vs. performance. The 2180 Series is available in an 8-pin single-in-line (SIP) package.
BIAS CURRENT COMPENSATION
Input
1 6
Gnd
7
2k Vcc
Vbe MULTIPLIER
2
Ec+ 25
Ec-
3
8
Output
4
Sym
Iadj Iset
V-
5
Figure 1. 2180-series equivalent circuit diagram
Pin Name
Pin Number
Input
1
Ec+ 2
Ec- 3
Sym
4
V- 5
Gnd 6
V+ 7
Output
8
Table 1. Pin assignments
Max TH...
