Electrical Characteristics (Cont’d.)

2151

2150A

2155

Parameter

Symbol

Conditions

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Units

Total Harmonic Distortion

THD

I

IN

+ I

OUT

= 180

µA, 1 kHz

0 dB gain

—

0.004 0.02

—

0.005 0.03

—

—

—

%

±15 dB gain

—

0.025 0.045

—

0.05

0.07

—

—

—

%

I

IN

+ I

OUT

= 150

µA, 1 kHz

0 dB gain

—

—

—

—

—

—

—

0.006 0.03

%

±15 dB gain

—

—

—

—

—

—

—

0.05

0.07

%

Symmetry Control Voltage

V

SYM

A

V

= 0 dB, THD < 0.07%

-1.6

0

+1.6

-2

0

+2

-2.5

0

+2.5

mV

Gain at 0 V Control Voltage

E

C–

= 0 mV

-0.1

0.0

+0.1

-0.15

0.0

+0.15

-0.2

0.0

+0.2

dB

Ec+

Ec+

Ec-

OUT

-IN

V-

GND

V+

-

+

Ec-

10u

LF351

47p

20k

50k

ADJ

SYM

150k

51

5.1k

20k

+15V

-15V

-15V

+15V

OUTPUT

Rsym

INPUT

1

5

6

2

4

8

3

7

300k (2155)

390k (2150A)

470k (2151)

Figure 3. Typical Application Circuit

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

2150

Series

VCA

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

THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA

Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com

Rev. 10/25/96

Page 3