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THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
600030 Rev 01
Page 3
Electrical Characteristics (Cont'd.)
2181A
2181B
2181C
Parameter
Symbol
Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
Total Harmonic Distortion
THD
1 kHz
VIN = 0 dBV, 0 dB gain
— 0.0025 0.005
—
0.004 0.008
—
0.005
0.02
%
VIN = +10 dBV, -15 dB gain
—
0.018 0.025
—
0.025 0.035
—
0.035
0.07
%
VIN = -5 dBV, +15 dB gain
—
0.018 0.025
—
0.025 0.035
—
0.035
0.07
%
VIN = +10 dBV, 0 dB gain
—
0.004 0.008
—
0.006 0.010
—
.0015
—
%
Slew Rate
Rin =Rout =20k
W
—12
—
—12
—
—12
—
V/
ms
Symmetry Control Voltage VSYM
AV = 0 dB, Minimum THD
-0.5
—
+0.5
-1.5
—
+1.5
-2.5
—
+2.5
mV
Gain at 0 V Control Voltage
EC- = 0 mV
-0.1
0.0
+0.1
-0.15
0.0
+0.15
-0.2
0.0
+0.2
dB
Figure 3. 2181 Series Frequency Response Vs. Gain
Figure 4. 2181 Series Noise (20kHz NBW) Vs. Gain
Vcc
Ec-
IN
10u
20k
5.1k
Vee
OUT
22p
20k
OUT
Vcc
Vee
50k
SYM
ADJ
Rsym
OP275
7
3
8
4
2
6
5
1
V+
-IN
Ec-
Ec+
SYM
GND
V-
2181
Series
VCA
Power Supplies
Vcc = +15 V
Vee=-15 V
-
+
680k (2181A)
220k (2181B)
130k (2181C)
Figure 2. Typical Application Circuit
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