Philips Semiconductors Linear Products

Product specification

µA747C

Dual operational amplifier

54

August 31, 1994

853-0899 13721

DESCRIPTION

The 747 is a pair of high-performance monolithic operational

amplifiers constructed on a single silicon chip. High common-mode

voltage range and absence of “latch-up” make the 747 ideal for use

as a voltage-follower. The high gain and wide range of operating

voltage provides superior performance in integrator, summing

amplifier, and general feedback applications. The 747 is short-circuit

protected and requires no external components for frequency

compensation. The internal 6dB/octave roll-off insures stability in

closed-loop applications. For single amplifier performance, see

µA741 data sheet.

FEATURES

PIN CONFIGURATION

+

B

A

–

INVERTING INPUT B

NON–INVERTING INPUT B

OFFSET NULL B

V–

OFFSET NULL A

NON–INVERTING INPUT A

INV. INPUT A

OFFSET NULL B

V + B

OUTPUT B

1

2

3

4

5

6

7

8

14

13

12

11

10

9

OFFSET NULL A

V + A

OUTPUT A

NO CONNECT

N Package

TOP VIEW

–

+

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

14-Pin Plastic DIP

0

°C to 70°C

µA747CN

0405B

EQUIVALENT SCHEMATIC

NON–INVERTING

INPUT

Q1

Q8

Q2

Q3

Q4

Q7

Q5

Q6

R1

1K

Ω

R3

50K

Ω

R2

1K

Ω

Q9

Q13

R5

39K

Ω

Q10

Q11

Q22

V+

Q14

R9

25

Ω

OUTPUT

R10

50

Ω

Q20

Q16

Q17

Q18 Q15

V–

R11

50

Ω

R12

50k

Ω

R7

4.5

Ω

R8

7.5K

Ω

R4

5k

Ω

30pF

Q12

OFFSET NULL

INVERTING INPUT

OFFSET NULL