Datasheet NE531N, NE531FE, SE531FE Datasheet (Philips)

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

70

August 31, 1994 853-0809 13721

DESCRIPTION

The 531 is a fast slewing high performance operational amplifier
which retains DC performance equal to the best general purpose
types while providing far superior large-signal AC performance. A
unique input stage design allows the amplifier to have a large-signal
response nearly identical to its small-signal response. The amplifier
is compensated for truly negligible overshoot with a single capacitor.
In applications where fast settling and superior large-signal
bandwidths are required, the amplifier out-performs conventional
designs which have much better small-signal response. Also,
because the small-signal response is not extended, no special
precautions need be taken with circuit board layout to achieve
stability. The high gain, simple compensation, and excellent stability
of this amplifier allow its use in a wide variety of instrumentation
applications.

FEATURES

•35V/µs slew rate at unity gain

•Pin-for-pin replacement for µA709, µA748, or LM101

•Compensated with a single capacitor

PIN CONFIGURATIONS

1
2
3
4 5

6

7

8

–
+

OFFSET NULL

INVERTING INPUT

NON–INVERTING INPUT

V–

FREQ. COMP.

V+

OUTPUT

OFFSET

N, FE Packages

•Same low drift offset null circuitry as µA741

•Small-signal bandwidth 1MHz

•Large-signal bandwidth 500kHz

•True op amp DC characteristics make the 531 the ideal answer to

all slew rate limited operational amplifier applications

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

8-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C NE531N 0404B
8-Pin Ceramic Dual In-Line Package (CERDIP) -55°C to +125°C SE531FE 0580A
8-Pin Ceramic Dual In-Line Package (CERDIP) 0°C to +70°C NE531FE 0580A

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNIT

V

S

Supply voltage ±22 V

P

D MAX

Maximum power dissipation
TA=25°C (still-air)

1

FE package 780 mW
N package 1160 mW

Differential input voltage ±15 V

V

CM

Common-mode input voltage

2

±15 V

Voltage between offset null and V- ±0.5 V

T

A

Operating ambient temperature range

NE531 0 to +70 °C
SE531 -55 to +125 °C

T

STG

Storage temperature range -65 to +150 °C

T

SOLD

Lead soldering temperature (10sec max) 300 °C
Output short-circuit duration

3

indefinite

NOTES:

1. The following derating factors should be applied above 25°C:
FE package at 6.2mW/°C
N package at 9.3mW/°C

2. For supply voltages less than ±15V, the absolute maximum input voltage is equal to the supply voltage.

3. Short-circuit may be to ground or either supply. Rating applies to +125°C case temperature or to +75°C ambient temperature.

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

71

EQUIVALENT SCHEMATIC

INPUT

2

Q1

Q2

R1

Q3

R2
.2

R3

2.2

Q7

Q9

Q10

R8

2.2

Q6

R5
.2

Q5

Q6

R4

R15
100

Q20

Q19

R14
10

R20
.33

Q23

Q27

Q38

Q37

Q29

Q22

Q35

Q21

R16
10

Q11 Q12

R18
.33

Q28

Q25

R24
.04

OUTPUT

R22

3.3

R28
.04

Q30

Q32

Q31

R17
10

Q33

Q34

Q24

Q23

R10

6.5

R21
.2

R27

6.5

R13

1.6

5 6

OFFSET ADJUST

FREQUENCY

COMPENSATION

Q13 Q14

Q15

R7

6.5

R11

1.5

R8

7.8

R12
.17

Q17

Q18

Q19

R9

1.8

INPUT

3

+

OFFSET

ADJUST

1

4

V

R10

6.5

q8

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

72

DC ELECTRICAL CHARACTERISTICS

VS=±15V, unless otherwise specified.

SE531 NE531

SYMBOL

PARAMETER

TEST CONDITIONS

Min Typ Max Min Typ Max

UNIT

V

OS

Offset voltage

RS≤10kΩ, TA=25°C

R

S

310kΩ, over temp

2.0 5.0

6.0

2.0 6.0

7.5

mV
mV

∆V

OS

Over temp 10 10 µV/°C

I

OS

Offset current

TA=25°C

T

A

=High

T

A

=Low

30 200

200
500

50 200

200
300

nA
nA
nA

∆I

OS

Over temp 0.4 0.4 nA/°C

I

BIAS

Input bias current

T=25°C

T

A

=High

T

A

=Low

300 500

500

1500

400 1500

1500
2000

nA
nA
nA

∆I

BIAS

Over temp 2 2 nA/°C

V

CM

Common-mode voltage range TA=25°C ±10 ±10 V

CMRR Common-mode rejection ratio

TA=25°C, RS≤10kΩ

70 100 dB

Over temp RS≤10kΩ 70 90 dB

R

IN

Input resistance TA=25°C 20 20 MΩ

V

OUT

Output voltage swing RL≥10kΩ, over temp ±10 ±13 ±10 ±13 V

I

CC

Supply current TA=25°C 7.0 10 mA

T

MAX

7.0 10 mA

P

D

Power consumption TA=25°C 210 300 mW

RS≤10kΩ, TA=25°C 10 150 µV/V

PSRR Power supply rejection ratio

RS≤10kΩ, over temp 10 150 µV/V

R

OUT

Output resistance TA=25°C 75 75 Ω

TA=25°C,

R

L

≥10kΩ, V

OUT

=±10V

50 100 20 60 V/mV

A

VOL

Large-signal voltage gain

RL≥10kΩ, V

OUT

=±10V,

over temp

25 15 V/mV

V

INN

Input noise voltage 25°C f=1kHz 20 20 nV/√Hz

I

SC

Short-circuit current 25°C 5 15 45 5 15 45 mA

AC ELECTRICAL CHARACTERISTICS

TA=25°C VS=+15V, unless otherwise specified.

1

SE531 NE531

SYMBOL

PARAMETER

TEST CONDITIONS

Min Typ Max Min Typ Max

UNIT

BW Full power bandwidth 500 500 kHz
t

S

Settling time (1%)
(0.1%)

AV=+1, VIN=±10V

1.5

2.5

1.5

2.5

µs
µs

Large-signal overshoot AV=+1, VIN=±10V 2 2 %
Small-signal overshoot AV=+1, VIN=400mV 5 5 %

t

R

Small-signal rise time AV=+1, VIN=400mV 300 300 ns

SR Slew rate AV=100 35 35 V/µs

AV=10 35 35 V/µs

AV=1 (non-inverting) 20 30 30 V/µs

AV=1 (inverting) 25 35 35 V/µs

NOTES:

1. All AC testing is performed in the transient response test circuit.

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

73

TEST LOAD CIRCUITS

Offset Null Circuit

Transient Response Circuit

2

V+

–

7

3

4

+

1

5

10K

6

V–

E

IN

2

V+

100pF

7

8

3

4

–

+

50Ω

V–

51Ω

E

OUT

2KΩ

30pf

TYPICAL PERFORMANCE CHARACTERISTICS V

S

= +15V, TA = +255C, unless otherwise specified.

TEMPERATURE - C

–20

160

140
120

100

80

60

40

20

0

–60 20 60 100 140

TEMPERATURE - C

INPUT OFFSET CURRENT -nA

1000

800

600

400

200

0

INPUT BIAS CURRENT -nA

–20–60 20 60 100 140

120

110

100

90

80

5 10 15 20 25

SUPPLY VOLTAGE – +

V

INPUT BIAS CURRENT – nA

AV = 1000,
Ri = 50Ω

CC = 2pF

C

C

OUT

V

Rf =
50kΩ

Ri

AV = 100, Ri = 5000Ω
CC = 2pF

AV = 10, Ri = 5.50Ω,
C

C

= 10pF

AV = 10, Ri = 00,0Ω

+60

+50

+40

+30

+20

+10

0

–10

10K

100K

1M

10M

FREQUENCY – Hz

VOLTAGE DRAIN – dB

GAIN

CC = 100PF

PHASE

PHASE IN DEGREES

VOLTAGE GAIN — dB

0

15
30

45
60

75

90
105
120

135
150
165
180

120
110

100

90
80
70
60
50
40
30
20
10

0

1 10 100 1K 10K 100K 1M 10M

FREQUENCY – Hz

CONSUMPTION —mW

300
275
250
225
200
175
150
125
100

75
50

5V 10 15 20 25

SUPPLY VOLTAGE — +

V

+

–

531

Input Offset Curent as a Function

of Ambient Temperature

Input Bias Curent as a Function

of Ambient Temperature

Input Bias Curent as a Function

of Supply Voltage

Closed Loop Non-Inverting Voltage Gain

as a Function of Frequency

Open-Loop Phase Response and

Voltage Gain as a Function of

Ambient Temperature

Power Consumption as a Function

of Supply Voltage

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

74

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

VS = +15V, TA = 25°C, unless otherwise specified.

250

200

150

100

50

–60 –20 +20 +60 +100 +140

POWER CONSUMPTION — mW

TEMPERATURE — C

o

0

115

110

100

95

90

85

80

5 10 15 20

V VOLTAGE GAIN —dB

L

SUPPLY VOLTS — +V

+15

+10

+5

0

–5

–10

–15

5 10 15

SUPPLY VOLTAGE — +

V

OUTPUT SWING — VOLTS

COMMON MODE RANGE — V

+15

+10

+5

0

–5

–10

–15

5 10 15

SUPPLY VOLTAGE — +

V

20

27

24

21

18

12

9

6

3
0

1K 3K 10K 30K 100K 300K 1M

PEAK–TO–PEAK OUTPUT SWING — V

+

–

531

100pF

IN

2K

OUT

FREQUENCY, Hz

+

–

531

100pF

IN

30Pf

OUT

2K

+10

+5

0

–5

–10

OUTPUT VOLTAGE — V

0 500 1000 15002000 2500 3000 3500

TIME — nsec

+

–

531

100pF

IN

OUT

VIN = 400mV

90%

10%

500

400

300

200

100

0

0 200 400 600 800 1000 1200 1400

TIME — nsec

OUTPUT VOLTAGE —mV

+

–

531

IN

OUT

10K

50pF

5K

10K

+15

+10

+5

0V

–5

–10

–15

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

TIME — µsec

OUTPUT VOLTAGE — V

Power Consumption

as a Function of Ambient Temperature

Open-Loop Voltage Gain as a

Function of Supply Voltage

Output Voltage Swing as a Function

of Supply Voltage

Input Voltage Range

as a Function of Supply Voltage

Output Voltage Swing as a

Function of Frequency

Voltage Follower

Large-Signal Response

Unity Gain Inverting Amplifier Large-Signal

Response Function of Frequency

Voltage Follower

Transient Response

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

75

TYPICAL APPLICATIONS

High-Speed Inverter

(10MHz Bandwidth)

Pulse Response

High-Speed Inverter

Fast Settling Voltage-Follower

Large-Signal Response Voltage-Follower

Three-Pole Active Low-Pass Filter Butterworth

Maximally Flat Response

1

Response of 3-Pole Active

Butterworth Maximally Flat Filter

2pf

IN

10K

10K

5.1K

V+

531

30pf

OUT

4.7K

V–

f

o

100pF

531

+

–

IN

OUT

30K

10K10K

531

.0032

.056

10K

.022

100pF

f

0

– 1KHz

0.5V/DIV

200nsec/DIV

2V/DIV

0.5µs/DIV f = 500KHz

60dB/DECADE

0

–5

–10

–15

–20

–25

100 300 1K 3K 10K

FREQUENCY — Hz

ATTENUATION — dB

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

76

TYPICAL APPLICATIONS (Continued)

531

IN

a. Half-Wave

b. Full-Wave

Precision Rectifiers

AC Millivoltmeter

Sample-and-Hold

531

100pF

IN

10K

10K

OUT

5.1K

+

–

10K

531

100K

100K

531

+

–

100pF

DIODES

IN914

1µF

M

R

E

IN

1%
10K

100pF

5.1K

–

+

–

+

531

100PF

10K 1%

OUT

SIGNAL
IN

18K

330pF

470

33K

IN457

IN/51A

–
+

LOGIC IN

300K

15MSEC

Q1
ZN3819

Q2
3N128

100K

.0047

CDE#
CD19
FD4725

30K

10K

–15 –15

+15

IN457

OUTPUT

531

–

+

Philips Semiconductors Linear Products Product specification

NE/SE531High slew rate operational amplifier

August 31, 1994

77

CYCLIC A-TO-D CONVERTER

One interesting, but much ignored, A/D converter is the cyclic
converter. This consists of a chain of identical stages, each of which
senses the polarity of the input. The stage then subtracts V

REF

from
the input and doubles the remainder if the polarity was correct. In
Figure 1, the signal is full-wave rectified and the remainder of
V

IN-VREF

is doubled. A chain of these stages gives the gray code
equivalent of the input voltage in digitized form related to the
magnitude of V

REF

. Possessing high potential accuracy, the circuit

using NE531 devices settles in 5µs.

TRIANGLE AND SQUARE WAVE GENERATOR

The circuit in Figure 2 will generate precision triangle and square
waves. The output amplitude of the square wave is set by the output

swing of op amp A-1, and R1/R2 sets the triangle amplitude. The
frequency of oscillation in either case is:

f 

1

4RC



R2
R1

(1)

The square wave will maintain 50% duty cycle even if the amplitude
of the oscillation is not symmetrical.

The use of the NE531 in this circuit will allow good square waves to
be generated to quite high frequencies. Since the amplifier A1 runs
open-loop, there is no need for compensation. The
triangle-generating amplifier must be compensated. The NE5535
device can be used as well, except for the lower frequency
response.

a. b.

+v

cc

10K

LOGIC OUT

NE531

+

–

10K

2K

V

REF

NE531

+

–

20K

20K

V

OUT

V

REF

–V

IN

LOGOUT

V

IN

V

REF

V

REF

V

IN

0

Figure 1. Cyclic A-to-D Converter