BSS DBX2150A User Manual

THAT Corporation

IC Voltage-Controlled

Amplifiers

THAT 2151, 2150A, 2155

FEATURES

• Wide Dynamic Range: >116 dB

• Wide Gain Range: >130 dB

• Expo nential (dB) Gai n Control

• Low Distortion: (0.008% @ 0 dB

gain, 0.035% @15dB gain)

• Wide Gain-Bandwidth: 6 MHz

• Low Cost: $2.20 in ’000s (2155)

• Single In-L ine Packa ge

• Dual Gain-Control Ports (pos/neg)

Description

The THAT 2150 Series integra te d -c ircuit volt age ­controlled amplifiers (VCAs) are high-performance
current-in/current-out devices with two opposing­polarity, voltage-sensitive control ports. Based on
dbx technology, they offer wide-range exponential
control of gain and attenuation with low signal dis­tortion . The pa rts are h oused in a sp ace-efficient,
plastic 8-pin single-in-line (SIP) package, and re-

APPLICATIONS

• Faders

• Panners

• Compressors

• Expanders

• Equalizers

• Filters

• Oscillators

• Automation Systems

quire minimal support circuitry. Fabricated in a
super low-nois e process utilizing high hFE, comple­mentary NPN/PNP pairs, the 2150 Series VCAs
combine high gain-bandwidth product with low
noise, low distortio n, and l ow offse t to offer d i s cr e te
performance at IC prices. They are available in
three grades, selected for distortion, allowing the
user to optimize cost vs. performance.

BIAS CURRENT

COMPENSATION

1

6

Vbe

MULTI-

PLIER

Figure 1. 215 0 S e rie s Equi v a le n t Circuit Diagr am

dbx is a registered trademark of Ca r illon Electronics Co r p ora tion

THAT Corporation; 734 Fo rest Street; Marlborou g h , Mas sach usetts 01752; USA

Tel: [phone]; Fax: [phone]; Web: http://www.thatcorp.com

PIN 1

7

2

THAT

N

TYP.

B
D
C

MODEL NO.

H

J

GE

M

F

L
K

I

A

3

8

4

5

ITEM MILLIMETERS INCHES

A 20.32 MAX.
B

1.1 MIN.

+_

.1

C

0.5

0.25

D

2.54

E
F

1.27 MAX.

G

0.51 MIN.

H

5.08 MAX.

+

_

.2

2.8

I

5.75 MAX.

J

1.5 MAX.

K
L
MN3.2

0.25

1.1 MIN.

_

+.10

.04

+

_

.5

0.8 MAX.

0.043 MIN.

_

+

0.02

0.01

0.1

0.05 MAX.

0.02 MIN.

0.2 MAX.

+

_

.008

0.11

0.227 MAX.

0.058 MAX.

.004 .002+

0.01

0.126

0.043 MIN.

.004

+

_

_

.02

Figure 2. 2150 Series Physical Outline

Page 2 2150 Series IC VCAs

SPECI FICATIONS

1

Absolute-Maximum Ratings (TA = 25˚C)

Positive Supply Voltage (VCC) +18 V
Negative Supply Voltage (VEE) -18 V
Supply Current (ICC)10 mA

Power Dissipation (PD) (TA = 75˚C) 330 mW
Operating Temperature Range (TOP) -20 to +75˚C
Storage Tempe rat ur e R an g e ( TST) -40 to +125˚C

Recommended Operating Conditions

2151 2150A 2155

Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units

Positive Supply Voltage V
Negative Supply Voltage V
Bias Current I
Signal Current I

IN+IOUT

SET

CC

EE

VCC-VEE= 24 V — 2.4 4 — 2.4 4 — 2.4 4 mA

I

= 2.4 mA — 175 750 — 175 750 — 125 550 µArms

SET

Electrical Characteristics

+5 +12 +15 +5 +12 +15 +5 +12 +15 V

-5 -12 -15 -5 -12 -15 -5 -12 -15 V

2

2151 2150A 2155

Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units

Supply Current I

Equiv. Input Bias Current I

Input Offset Voltage V

Output Offset Voltage V

Gain Cell Idling Current I

Gain-Control Constant T

Gain-co nt rol Temp Co ∆ EC / ∆ T

Gain-Control Linearity -60 to +40 dB gain — 0.5 2 — 0.5 2 — 0.5 2 %

Off Isolation (Fig. 14) EC+=-360mV, EC-=+360mV 110 115 — 110 115 110 115 — dB

Output Noise e

CC

B

OFF(IN)

OFF(OUT)

IDLE

/Gain (dB) Pins 2 & 4 (Fig. 14) 6.0 6.1 6.2 6.0 6.1 6.2 6.0 6.1 6.2 mV/dB

E

C+

EC-/Gain (dB) Pin 3 -6.0 -6.1 -6.2 -6.0 -6.1 -6.2 -6.0 -6.1 -6.2 mV/dB

CHIP

n(OUT)

No Signal — 2.4 4 — 2.4 4 — 2.4 4 mA

No Signal — 5 8 — 5 8 — 5 8 nA

No Signal — +10 — — +10 — — +10 — mV

R

=20 kΩ

out

0 dB gain — 1 3 — 1 3 — 1 3 mV
+15 dB gain — 2 3 — 2 3 — 2 3 mV
+40 dB gain — 5 15 — 7 15 — 10 15 mV

—20— —20— —20— µA

=25˚C (T

A

-60 dB < gain < +40 dB

Ref T

20 Hz-20 kHz

R

+15 dB gain — -88 -86 — -88 -86 — -88 -86 dBV

≅35˚C)

CHIP

= 27˚C — +0.33 — — +0.33 — — +0.33 — %/˚C

CHIP

= 20kΩ

out

0 dB gain — -98 -97 — -98 -96 — -98 -96 dBV

1. All specifications subject to change without notice.

2. Unless otherwise noted, TA=25˚C, VCC = +15V, VEE= -15V. Test circuit is as shown in Figure 3. SYM
justed for minimum THD @ Vin=1 V, 1 kHz, 0 dB gain.

THAT Corporation; 734 Fo rest Street; Marlborou g h , Mas sach usetts 01752; USA

Tel: [phone]; Fax: [phone]; Web: http://www.thatcorp.com

ADJ

is ad-

Rev. 10/25/96 Page 3

Electrical Characteristics (Cont’d.)

2151 2150A 2155

Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units

Total Harmonic Distortion THD IIN+ I

= 180 µA, 1 kHz

OUT

0 dB gain — 0.004 0.02 — 0.005 0.03 — — — %
±15 dB gain — 0.025 0.045 — 0.05 0.07 — — — %

+ I

= 150 µA, 1 kHz

I

IN

OUT

0 dB gain — — — — — — — 0.006 0.03 %
±15 dB gain — — — — — — — 0.05 0.07 %

Symmetry Control Voltage V

Gain at 0 V Control Voltage E

AV= 0 dB, THD < 0.07% -1.6 0 +1.6 -2 0 +2 -2.5 0 +2.5 mV

SYM

INPUT

10u

= 0 mV -0.1 0.0 +0.1 -0.15 0.0 +0.15 -0.2 0.0 +0.2 dB

C–

+15V

-

LF351

+

47p

20k

OUTPUT

20k

Ec-

2150

GND

Series

VCA

3

Ec-

OUT

Ec+

Ec+

6

8

4

2

7

V+

1

-IN

V-

5

+15V

5.1k
51

Rsym

150k

300k (2155)

390k (2150A)

470k (2151)

50k
SYM

ADJ

Figure 3. Typical Application Circuit

Figure 4. Frequency Response Vs. Gain (2150A)

THAT Corporation; 734 Fo rest Street; Marlborou g h , Mas sach usetts 01752; USA

Tel: [phone]; Fax: [phone]; Web: http://www.thatcorp.com

-15V-15V

Figure 5. Noise (20kHz NBW) Vs. Gain (2150A)