Philips Semiconductors Linear Products Product specification
µA747CDual 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

•No frequency compensation required
•Short-circuit protection
•Offset voltage null capability
•Large common-mode and differential voltage ranges
•Low power consumption
•No latch-up

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°CµA747CN 0405B

EQUIVALENT SCHEMATIC

NON–INVERTING
INPUT Q1
Q8
Q2
Q3 Q4
Q7
Q5 Q6
R1
1KΩR3
50KΩR2
1KΩ
Q9 Q13
R5
39KΩ
Q10 Q11 Q22
V+
Q14
R9
25Ω
OUTPUT
R10
50Ω
Q20
Q16
Q17
Q18 Q15
V–
R11
50Ω
R12
50kΩ
R7
4.5Ω
R8
7.5KΩ
R4
5kΩ
30pF
Q12
OFFSET NULL
INVERTING INPUT
OFFSET NULL