LM2900,LM3301,LM3900

LM2900/LM3900/LM3301 Quad Amplifiers

Literature Number: SNOSBV6

 LM2900/LM3900/LM3301 Quad Amplifiers

LM2900/LM3900/LM3301
April 1998

LM2900/LM3900/LM3301
Quad Amplifiers
General Description Range or dual supplies: ± 2 VDC to ± 16 VDC
n Supply current drain independent of supply voltage
The LM2900 series consists of four independent, dual input,
n Low input biasing current: 30 nA
internally compensated amplifiers which were designed spe-
cifically to operate off of a single power supply voltage and to n High open-loop gain: 70 dB
provide a large output voltage swing. These amplifiers make n Wide bandwidth: 2.5 MHz (unity gain)
use of a current mirror to achieve the non-inverting input n Large output voltage swing: (V+ − 1) Vp-p
function. Application areas include: ac amplifiers, RC active n Internally frequency compensated for unity gain
filters, low frequency triangle, squarewave and pulse wave- n Output short-circuit protection
form generation circuits, tachometers and low speed, high
voltage digital logic gates.

Features
n Wide single supply voltage: 4 VDC to 32 VDC

Schematic and Connection Diagrams

Dual-In-Line and S.O.

DS007936-2

Top View
Order Number LM2900N, LM3900M, LM3900N or
LM3301N
See NS Package Number M14A or N14A

DS007936-1

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 Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM2900/LM3900 LM3301
Supply Voltage 32 VDC 28 VDC
± 16 VDC ± 14 VDC
Power Dissipation (TA = 25˚C) (Note 2)
Molded DIP 1080 mW 1080 mW
S.O. Package 765 mW
Input Currents, IIN+ or IIN− 20 mADC 20 mADC
Output Short-Circuit Duration — One Amplifier Continuous Continuous
TA = 25˚C (See Application Hints)
Operating Temperature Range −40˚C to +85˚C
LM2900 −40˚C to +85˚C
LM3900 0˚C to +70˚C
Storage Temperature Range −65˚C to +150˚C −65˚C to +150˚C
Lead Temperature (Soldering, 10 sec.) 260˚C 260˚C
Soldering Information
Dual-In-Line Package
Soldering (10 sec.) 260˚C 260˚C
Small Outline Package
Vapor Phase (60 sec.) 215˚C 215˚C
Infrared (15 sec.) 220˚C 220˚C
See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount
devices.
ESD tolerance (Note 8) 2000V 2000V

Electrical Characteristics
(Note 7) TA = 25˚C, V+ = 15 VDC, unless otherwise stated
Parameter Conditions LM2900 LM3900 LM3301 Units
Min Typ Max Min Typ Max Min Typ Max
Open Voltage Gain Over Temp. V/mV
Loop Voltage Gain ∆VO = 10 VDC 1.2 2.8 1.2 2.8 1.2 2.8
Input Resistance Inverting Input 1 1 1 MΩ
Output 8 8 9 kΩ
Resistance
Unity Gain Bandwidth Inverting Input 2.5 2.5 2.5 MHz
Input Bias Current Inverting Input, V+ = 5 VDC 30 200 30 200 30 300 nA
Inverting Input
Slew Rate Positive Output Swing 0.5 0.5 0.5 V/µs
Negative Output Swing 20 20 20
Supply Current RL = ∞ On All Amplifiers 6.2 10 6.2 10 6.2 10 mADC
Output VOUT High RL = 2k, IIN− = 0, 13.5 13.5 13.5
Voltage V+ = 15.0 VDC IIN+ = 0
Swing VOUT Low IIN− = 10 µA, 0.09 0.2 0.09 0.2 0.09 0.2
IIN+ = 0 VDC
VOUT High V+ = Absolute IIN− = 0,
Maximum Ratings IIN+ = 0 29.5 29.5 26.0
RL = ∞,
Output Source 6 18 6 10 5 18
Current Sink (Note 3) 0.5 1.3 0.5 1.3 0.5 1.3 mADC
Capability ISINK VOL = 1V, IIN− = 5 µA 5 5 5
Power Supply Rejection TA = 25˚C, f = 100 Hz 70 70 70 dB

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 Electrical Characteristics (Continued)

(Note 7) TA = 25˚C, V+ = 15 VDC, unless otherwise stated

Parameter Conditions LM2900 LM3900 LM3301 Units
Min Typ Max Min Typ Max Min Typ Max
Mirror Gain @ 20 µA (Note 4) 0.90 1.0 1.1 0.90 1.0 1.1 0.90 1 1.10 µA/µA
@ 200 µA (Note 4) 0.90 1.0 1.1 0.90 1.0 1.1 0.90 1 1.10
∆Mirror Gain @ 20 µA to 200 µA (Note 4) 2 5 2 5 2 5 %
Mirror Current (Note 5) 10 500 10 500 10 500 µADC
Negative Input Current TA = 25˚C (Note 6) 1.0 1.0 1.0 mADC
Input Bias Current Inverting Input 300 300 nA
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Note 2: For operating at high temperatures, the device must be derated based on a 125˚C maximum junction temperature and a thermal resistance of 92˚C/W which
applies for the device soldered in a printed circuit board, operating in a still air ambient. Thermal resistance for the S.O. package is 131˚C/W.
Note 3: The output current sink capability can be increased for large signal conditions by overdriving the inverting input. This is shown in the section on Typical Char-
acteristics.
Note 4: This spec indicates the current gain of the current mirror which is used as the non-inverting input.
Note 5: Input VBE match between the non-inverting and the inverting inputs occurs for a mirror current (non-inverting input current) of approximately 10 µA. This is
therefore a typical design center for many of the application circuits.
Note 6: Clamp transistors are included on the IC to prevent the input voltages from swinging below ground more than approximately −0.3 VDC. The negative input
currents which may result from large signal overdrive with capacitance input coupling need to be externally limited to values of approximately 1 mA. Negative input
currents in excess of 4 mA will cause the output voltage to drop to a low voltage. This maximum current applies to any one of the input terminals. If more than one
of the input terminals are simultaneously driven negative smaller maximum currents are allowed. Common-mode current biasing can be used to prevent negative in-
put voltages; see for example, the “Differentiator Circuit” in the applications section.
Note 7: These specs apply for −40˚C ≤ TA ≤ +85˚C, unless otherwise stated.
Note 8: Human body model, 1.5 kΩ in series with 100 pF.

Application Hints
When driving either input from a low-impedance source, a Unintentional signal coupling from the output to the
limiting resistor should be placed in series with the input lead non-inverting input can cause oscillations. This is likely only
to limit the peak input current. Currents as large as 20 mA in breadboard hook-ups with long component leads and can
will not damage the device, but the current mirror on the be prevented by a more careful lead dress or by locating the
non-inverting input will saturate and cause a loss of mirror non-inverting input biasing resistor close to the IC. A quick
gain at mA current levels — especially at high operating tem- check of this condition is to bypass the non-inverting input to
peratures. ground with a capacitor. High impedance biasing resistors
Precautions should be taken to insure that the power supply used in the non-inverting input circuit make this input lead
for the integrated circuit never becomes reversed in polarity highly susceptible to unintentional AC signal pickup.
or that the unit is not inadvertently installed backwards in a Operation of this amplifier can be best understood by notic-
test socket as an unlimited current surge through the result- ing that input currents are differenced at the inverting-input
ing forward diode within the IC could cause fusing of the in- terminal and this difference current then flows through the
ternal conductors and result in a destroyed unit. external feedback resistor to produce the output voltage.
Output short circuits either to ground or to the positive power Common-mode current biasing is generally useful to allow
supply should be of short time duration. Units can be de- operating with signal levels near ground or even negative as
stroyed, not as a result of the short circuit current causing this maintains the inputs biased at +VBE. Internal clamp tran-
metal fusing, but rather due to the large increase in IC chip sistors (Note 6) catch-negative input voltages at approxi-
dissipation which will cause eventual failure due to exces- mately −0.3 VDC but the magnitude of current flow has to be
sive junction temperatures. For example, when operating limited by the external input network. For operation at high
from a well-regulated +5 VDC power supply at TA = 25˚C with temperature, this limit should be approximately 100 µA.
a 100 kΩ shunt-feedback resistor (from the output to the in- This new “Norton” current-differencing amplifier can be used
verting input) a short directly to the power supply will not in most of the applications of a standard IC op amp. Perfor-
cause catastrophic failure but the current magnitude will be mance as a DC amplifier using only a single supply is not as
approximately 50 mA and the junction temperature will be precise as a standard IC op amp operating with split supplies
above TJ max. Larger feedback resistors will reduce the cur- but is adequate in many less critical applications. New func-
rent, 11 MΩ provides approximately 30 mA, an open circuit tions are made possible with this amplifier which are useful
provides 1.3 mA, and a direct connection from the output to in single power supply systems. For example, biasing can be
the non-inverting input will result in catastrophic failure when designed separately from the AC gain as was shown in the
the output is shorted to V+ as this then places the “inverting amplifier,” the “difference integrator” allows con-
base-emitter junction of the input transistor directly across trolling the charging and the discharging of the integrating
the power supply. Short-circuits to ground will have magni- capacitor with positive voltages, and the “frequency doubling
tudes of approximately 30 mA and will not cause cata- tachometer” provides a simple circuit which reduces the
strophic failure at TA = 25˚C. ripple voltage on a tachometer output DC voltage.

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 Typical Performance Characteristics
Open Loop Gain Voltage Gain Voltage Gain

DS007936-53 DS007936-54 DS007936-55

Input Current Supply Current Large Signal Frequency

Response

DS007936-56 DS007936-57

DS007936-58

Output Sink Current Output Class-A Bias Current Output Source Current

DS007936-59 DS007936-60 DS007936-61

Supply Rejection Mirror Gain Maximum Mirror Current

DS007936-62 DS007936-63 DS007936-64

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 Typical Applications (V+ = 15 VDC)

Inverting Amplifier Triangle/Square Generator

DS007936-3
DS007936-4

Frequency-Doubling Tachometer Low VIN − VOUT Voltage Regulator

DS007936-5

DS007936-6

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 Typical Applications (V+ = 15 VDC) (Continued)

Non-Inverting Amplifier Negative Supply Biasing

DS007936-8
DS007936-7

Low-Drift Ramp and Hold Circuit

DS007936-10

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 Typical Applications (V+ = 15 VDC) (Continued)

Bi-Quad Active Filter

(2nd Degree State-Variable Network)

DS007936-11

Q = 50
fO = 1 kHz

Voltage-Controlled Current Source

(Transconductance Amplifier)

DS007936-12

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 Typical Applications (V+ = 15 VDC) (Continued)

Hi VIN , Lo (VIN − VO) Self-Regulator

DS007936-13

Q1 & Q2 absorb Hi VIN

Ground-Referencing a Differential Input Signal

DS007936-14

Voltage Regulator Fixed Current Sources

DS007936-15

(VO = VZ + VBE)

DS007936-16

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 Typical Applications (V+ = 15 VDC) (Continued)

Voltage-Controlled Current Sink Buffer Amplifier

(Transconductance Amplifier)

DS007936-18

VIN ≥ VBE

DS007936-17

Tachometer

DS007936-19

VODC = A fIN
* Allows VO to go to zero.

Low-Voltage Comparator Power Comparator

DS007936-21
DS007936-20

No negative voltage limit if properly biased.

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 Typical Applications (V+ = 15 VDC) (Continued)

Comparator Schmitt-Trigger

DS007936-22

DS007936-23

Square-Wave Oscillator Pulse Generator

DS007936-24
DS007936-25

Frequency Differencing Tachometer

DS007936-26

VODC = A (f1 − f2)

Frequency Averaging Tachometer

DS007936-27

VODC = A (f1 + f2)

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 Typical Applications (V+ = 15 VDC) (Continued)

Squaring Amplifier (W/Hysteresis) Bi-Stable Multivibrator

DS007936-29

DS007936-28

Differentiator (Common-Mode “OR” Gate

Biasing Keeps Input at +VBE)

DS007936-31

f =A+B+C

DS007936-30

“AND” Gate Difference Integrator

DS007936-32
DS007936-33
f=A•B•C

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 Typical Applications (V+ = 15 VDC) (Continued)

Low Pass Active Filter

DS007936-34

fO = 1 kHz

Staircase Generator VBE Biasing

DS007936-35

DS007936-36

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 Typical Applications (V+ = 15 VDC) (Continued)

Bandpass Active Filter

DS007936-37

fo = 1 kHz
Q = 25

Low-Frequency Mixer

DS007936-38

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 Typical Applications (V+ = 15 VDC) (Continued)

Free-Running Staircase Generator/Pulse Counter

DS007936-39

Supplying IIN with Aux. Amp

(to Allow Hi-Z Feedback Networks)

DS007936-40

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 Typical Applications (V+ = 15 VDC) (Continued)

One-Shot Multivibrator

DS007936-41

PW ≅ 2 x 106C
* Speeds recovery.

Non-Inverting DC Gain to (0,0)

DS007936-42

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 Typical Applications (V+ = 15 VDC) (Continued)

Channel Selection by DC Control (or Audio Mixer)

DS007936-43

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 Typical Applications (V+ = 15 VDC) (Continued)

Power Amplifier

DS007936-44

One-Shot with DC Input Comparator

DS007936-45

Trips at VIN ≅ 0.8 V+

VIN must fall 0.8 V+ prior to t2

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 Typical Applications (V+ = 15 VDC) (Continued)

High Pass Active Filter

DS007936-46

Sample-Hold and Compare with New +VIN

DS007936-47

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 Typical Applications (V+ = 15 VDC) (Continued)

Sawtooth Generator

DS007936-48

Phase-Locked Loop

DS007936-49

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 Typical Applications (V+ = 15 VDC) (Continued)

Boosting to 300 mA Loads

DS007936-50

Split-Supply Applications (V+ = +15 VDC & V− = −15 VDC)

Book
Extract
Non-Inverting DC Gain End

DS007936-51

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 Split-Supply Applications (V+ = +15 VDC & V− = −15 VDC) (Continued)
Book
Extract
AC Amplifier End

DS007936-52

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THIS PAGE IS IGNORED IN THE DATABOOK

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 Physical Dimensions inches (millimeters) unless otherwise noted

Small Outline Package (M)

Order Number LM3900M
NS Package Number M14A

Molded Dual-In-Line Package (N)

Order Number LM2900N, LM3900N or LM3301N
NS Package Number N14A

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 LM2900/LM3900/LM3301 Quad Amplifiers

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-
VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-
CONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or sys- 2. A critical component in any component of a life support
tems which, (a) are intended for surgical implant into device or system whose failure to perform can be rea-
the body, or (b) support or sustain life, and whose fail- sonably expected to cause the failure of the life support
ure to perform when properly used in accordance device or system, or to affect its safety or effectiveness.
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.

National Semiconductor National Semiconductor National Semiconductor National Semiconductor

Corporation Europe Asia Pacific Customer Japan Ltd.
Americas Fax: +49 (0) 1 80-530 85 86 Response Group Tel: 81-3-5620-6175
Tel: 1-800-272-9959 Email: europe.support@nsc.com Tel: 65-2544466 Fax: 81-3-5620-6179
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Français Tel: +49 (0) 1 80-532 93 58
www.national.com Italiano Tel: +49 (0) 1 80-534 16 80

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

PrintDate=1998/04/29 PrintTime=11:07:23 39954 ds007936 Rev. No. 3 cmserv Proof 24

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