NSC LM321MFX, LM321MF, LM321H Datasheet

LM321
Low Power Single Op Amp

LM321 Low Power Single Op Amp

April 2001

General Description

The LM321 brings performance and economy to low power
systems. With a high unity gain frequency and a guaranteed

0.4V/µs slew rate, the quiescent current is only
430µA/amplifier (5V). The input common mode range in­cludes ground and therefore the device is able to operate in
single supply applications as well as in dual supply applica­tions. It is also capable of comfortably driving large capaci­tive loads.

The LM321 is available in the SOT23-5 package. Overall the
LM321 is a low power, wide supply range performance op
amp that can be designed into a wide range of applications
at an economical price without sacrificing valuable board
space.

Connection Diagram

SOT23-5

Features

(VCC=5V,TA= 25˚C. Typical values unless specified).

n Gain-Bandwidth product 1MHz
n Low supply current 430µA
n Low input bias current 45nA
n Wide supply voltage range +3V to +32V
n Stable with high capacitive loads
n Single version of LM324

Applications

n Chargers
n Power supplies
n Industrial: controls, instruments
n Desktops
n Communications infrastructure

Application Circuit

DC Summing Amplifier

(V

≥ 0VDCand VO≥ VDC)

IN’s

Top View

20007601

Where: V0=V1+V2-V3-V4,(V1+V2)≥(V3+V4) to keep V

O

20007607

>

0V

DC

Ordering Information

Package Part Number Package Marking Transport Media NSC Drawing

5-Pin SOT-23 LM321MF A63A 1k Units Tape and Reel MF05A

LM321MFX 3k Units Tape and Reel

© 2001 National Semiconductor Corporation DS200076 www.national.com

Absolute Maximum Ratings (Note 1)

LM321

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Differential Input Voltage
Input Current (V
Supply Voltage (V

<

−0.3V) (Note 6) 50mA

IN

+-V−

) 32V
Input Voltage −0.3V to +32V
Output Short Circuit to GND,

+

V

≤ 15V and TA= 25˚C (Note 2) Continuous

Storage Temperature Range −65˚C to 150˚C

±

Supply Voltage

Junction Temperature (Note 3) 150˚C

Mounting Temperature

Lead Temp (Soldering, 10 sec) 260˚C
Infrared (10 sec) 215˚C

Thermal Resistance to Ambient (θ

) 265˚C/W

JA

ESD Tolerance (Note 10) 300V

Operating Ratings (Note 1)

Temperature Range −40˚C to 85˚C
Supply Voltage 3V to 30V

Electrical Characteristics Unless otherwise specified, all limits guaranteed for at T

0V, V

= 1.4V. Boldface limits apply at temperature extremes.

O

Symbol Parameter Conditions Min

(Note 5)

V

OS

Input Offset Voltage (Note 7) 2 7

= 25˚C; V+= 5V, V−=

A

Typ

(Note 4)

(Note 5)

Max

Units

mV

9

I

OS

Input Offset Current 5 50

nA

150

I

B

Input Bias Current (Note 8) 45 250

nA

500

V

CM

A

V

Input Common-Mode Voltage Range V+= 30V (Note 9)

Large Signal Voltage Gain (V+= 15V, RL=2kΩ

PSRR Power Supply Rejection Ratio R

CMRR Common Mode Rejection Ratio R
V

O

I

S

I

SOURCE

I

SINK

I

O

Output Swing V

OH

V

OL

Supply Current, No Load V+= 5V 0.430

Output Current Sourcing VID= +1V, V+= 15V,

Output Current Sinking VID= −1V

Output Short Circuit to Ground

0V

>

For CMRR

= 1.4V to 11.4V)

V

O

≤ 10kΩ,

S
+

≤ 5V to 30V

V

≤ 10kΩ 65 85 dB

S

= 50dB

25

100 V/mV

15

65 100 dB

V+= 30V, RL=2kΩ 26

+

= 30V, RL= 10kΩ 27 28

V
V+= 5V, RL= 10kΩ 520mV

0.7

+

V

= 30V 0.660

1.5

20

=2V

V

O

10

10

+

= 15V, VO=2V

V
V

= −1V

ID
+

= 15V, VO= 0.2V 12 100 µA

V

5

40

20

20

8 mA

V+= 15V 40 85 mA

+

- 1.5

+

-2

V

1.15

1.2

2.85

3

V

V

mA

mA

(Note 2)

SR Slew Rate V

GBW Gain Bandwidth Product V

+

= 15V, RL=2kΩ,

= 0.5 to 3V

V

IN

= 100pF, Unity Gain

C

L
+

= 30V, f = 100kHz,

= 10mV, RL=2kΩ,

V

IN

= 100pF

C

L

0.4 V/µs

1 MHz

φm Phase Margin 60 deg

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LM321

Electrical Characteristics Unless otherwise specified, all limits guaranteed for at T

0V, V

= 1.4V. Boldface limits apply at temperature extremes. (Continued)

O

Symbol Parameter Conditions Min

(Note 5)

THD Total Harmonic Distortion f = 1kHz, A

=2kΩ,VO=2VPP,

R

L

= 100pF, V+= 30V

C

L

e

n

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

Note 2: Short circuits from the output V
current is approximately 40mA independent of the magnitude of V
dissipation ratings and cause eventual destruction.

Note 3: The maximum power dissipation is a function of T
P

D

Note 4: Typical values represent the most likely parametric norm.
Note 5: All limits are guaranteed by testing or statistical analysis.
Note 6: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector base junction of the input PNP

transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action
on the IC chip. This transistor action can cause the output voltages of the op amps to go to the V
duration that an input is driven negative. This is not destructive and normal outputstateswillre-establishwhentheinputvoltage,which was negative, again returns
to a value greater than −0.36V (at 25˚C).

Note 7: V
Note 8: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the outputso

no loading change exists on the input lines.
Note 9: The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V (at 25˚C). The upper end of the

common-mode voltage range is V
Note 10: Human Body Model, 1.5kΩ in series with 100pF.

Equivalent Input Noise Voltage f = 1kHz, RS= 100Ω

+

= 30V

V

+

can cause excessive heating and eventual destruction. When considering short circuits to ground the maximum output

=(T

J(MAX)-TA

)/ θJA. All numbers apply for packages soldered directly onto a PC board.

≅ 1.4V, RS=0Ωwith V+from 5V to 30V; and over the full input common-mode range (0V to V+- 1.5V) at 25˚C.

O

+

- 1.5V at 25˚C, but either or both inputs can go to +32V without damage, independent of the magnitude of V+.

+

. At values of supply voltage in excess of +15V, continuous short circuits can exceed the power

, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is

J(MAX)

= 20dB

V

+

voltage level (or to ground for a large overdrive) for the time

= 25˚C; V+= 5V, V−=

A

Typ

(Note 4)

Max

(Note 5)

0.015 %

40 nV/

Units

Simplified Schematic

20007603

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