MOTOROLA LF441C, LF442C, LF444C Technical data

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These JFET input operational amplifiers are designed for low power
applications. They feature high input impedance, low input bias current and
low input offset current. Advanced design techniques allow for higher slew
rates, gain bandwidth products and output swing. The LF441C device
provides for the external null adjustment of input offset voltage.

These devices are specified over the commercial temperature range. All
are available in plastic dual in–line and SOIC packages.

• Low Supply Current: 200 µA/Amplifier

• Low Input Bias Current: 5.0 pA

• High Gain Bandwidth: 2.0 MHz

• High Slew Rate: 6.0 V/µs

• High Input Impedance: 10

• Large Output Voltage Swing: ±14 V

• Output Short Circuit Protection

Representative Schematic Diagram

J1 J2

Inputs

Q1 Q2

12

(Each Amplifier)

+

Q3

Ω

Q4

C1

Q5

D2

R3
D1

C2

Q7

Q6

R4

V

CC

Output

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LOW POWER

JFET INPUT

OPERATIONAL AMPLIFIERS

SEMICONDUCTOR

TECHNICAL DATA

8

1

N SUFFIX

PLASTIC PACKAGE

CASE 626

PIN CONNECTIONS

Offset Null

Inputs

V

EE

(Single, Top View)

Output 1

Inputs 1

V

EE

(Dual, Top View)

1
2

–
+

3
4

1

1

2

–
+

3

2

4

8

1

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

8

NC

7

V

CC

6

Output

5

Offset Null

8

V

CC

7

Output 2

6

–

Inputs 2

+

5

R1 R2

15

*

R5

*

*Null adjustment pins for LF441 only.

ORDERING INFORMATION

Operating

Device Function

LF441CD

Single

Temperature Range

LF441CN
LF442CD

LF442CN
LF444CD

Dual

TA = 0° to +70°C

Quad SO–14

LF444CN

MOTOROLA ANALOG IC DEVICE DATA

+

5

1.5 k

1

100 k

Ω

Ω

LF441C input offset voltage

null adjust circuit

Package

SO–8

Plastic DIP

SO–8

Plastic DIP

Plastic DIP

V

EE

14

V

EE

1

N SUFFIX

PLASTIC PACKAGE

CASE 646

14

1

D SUFFIX

PLASTIC PACKAGE

CASE 751A

(SO–14)

PIN CONNECTIONS

Output 1

Inputs 1

Inputs 2

Output 2

1

––

2

1

3

++

V

4

CC

++

5

23

6

––

78

(Quad, Top View)

 Motorola, Inc. 1996 Rev 0

14

Output 4

13

4

Inputs 4

12

11

V

EE

10

Inputs 3

9

Output 3

1

LF441C LF442C LF444C

MAXIMUM RATINGS

Rating Symbol Value Unit

Supply Voltage (from VCC to VEE) V
Input Differential V oltage Range (Note 1) V
Input Voltage Range (Notes 1 and 2) V
Output Short Circuit Duration (Note 3) t
Operating Junction Temperature (Note 3) T
Storage Temperature Range T

NOTES: 1. Differential voltages are at the noninverting input terminal with respect to the inverting

input terminal.

2.The magnitude of the input voltage must never exceed the magnitude of the supply
or 15 V, whichever is less.

3.Power dissipation must be considered to ensure maximum junction temperature (TJ)
is not exceeded (see Figure 1).

S

IDR

IR

SC

J

stg

+36 V

±30 V
±15 V

Indefinite sec

+150 °C

–60 to +150 °C

DC ELECTRICAL CHARACTERISTICS (V

Characteristic

Input Offset Voltage (RS = 10 kΩ, VO = 0 V) V

Single: TA = +25°C – 3.0 5.0

TA = 0° to +70°C – – 7.5

Dual: TA = +25°C – 3.0 5.0

TA = 0° to +70°C – – 7.5

Quad: TA = +25°C – 3.0 10

TA = 0° to +70°C – – 12

Average Temperature Coefficient of Offset V oltage ∆VIO/∆T – 10 – µV/°C

(RS = 10 kΩ, VO = 0 V)

Input Offset Current (VCM = 0 V, VO = 0 V) I

TA = +25°C – 0.5 50 pA
TA = 0° to +70°C – – 1.5 nA

Input Bias Current (VCM = 0 V, VO = 0 V) I

TA = +25°C – 3.0 100 pA
TA = 0° to +70°C – – 3.0 nA

Common Mode Input Voltage Range (TA = +25°C) V

Large Signal Voltage Gain (VO = ±10 V, RL = 10 kΩ) A

TA = +25°C 25 60 –
TA = 0° to +70°C 15 – –

Output Voltage Swing (RL = 10 kΩ) VO +

Common Mode Rejection (RS ≤ 10 kΩ, VCM = V
Power Supply Rejection (RS = 100 Ω, VCM = 0 V, VO = 0 V) PSR 70 84 – dB
Power Supply Current (No Load, VO = 0 V) I

Single – 200 250
Dual – 400 500
Quad – 800 1000

= +15 V, VEE = –15 V, TA = 0° to 70°C, unless otherwise noted.)

CC

Symbol Min Typ Max Unit

IO

IO

IB

ICR

VOL

VO –

, VO = 0 V) CMR 70 86 – dB

ICR

D

–

–11

+12

–

+14.5

–12

+14
–14

+11

–

–

–12

mV

V/mV

V

V

µA

2

MOTOROLA ANALOG IC DEVICE DATA

LF441C LF442C LF444C

AC ELECTRICAL CHARACTERISTICS (V

Characteristic Symbol Min Typ Max Unit

Slew Rate (Vin = –10 V to +10 V, RL = 10 kΩ, CL = 10 pF, AV = +1.0) SR 0.6 6.0 – V/ µs
Settling Time To within 10 mV t

(AV = –1.0, RL = 10 kΩ, VO = 0 V to +10 V) To within 1.0 mV – 2.2 –

Gain Bandwidth Product (f = 200 kHz) GBW 0.6 2.0 – MHz
Equivalent Input Noise Voltage (RS = 100 Ω, f = 1.0 kHz) e
Equivalent Input Noise Current (f = 1.0 kHz) i

Input Resistance R
Channel Separation (f = 1.0 Hz to 20 kHz) CS – 120 – dB

Figure 1. Maximum Power Dissipation versus

T emperature for Package Variations

2400

2000

8 & 14 Pin Plastic

1600

1200

Package

SO–14

= +15 V, VEE = –15 V, TA = +25°C, unless otherwise noted.)

CC

s

n

n

i

– 1.6 – µs

– 47 –
– 0.01 –

– 10

Figure 2. Input Bias Current versus

Input Common Mode Voltage

20

VCC = +15 V
VEE = –15 V

°

C

TA = 25

15

10

12

nV/ Hz√
pA/ Hz√

– Ω

SO–8

800

5.0

, INPUT BIAS CURRENT (pA)

400

MAXIMUM POWER DISSIPATION (mW)

D,

P

0
–55 –40 –20 0 20 40 60 80 100 120 140 160

TA, AMBIENT TEMPERATURE (°C) V

IB

I

0

–10 –5.0 0 5.0 10

, INPUT COMMON MODE VOLTAGE (V)

ICR

Figure 3. Input Bias Current versus T emperature Figure 4. Supply Current versus Supply V oltage

1000

VCC = +15 V

100

VEE = –15 V
VCM = 0 V

10

1.0

0.1

INPUT BIAS CURRENT (nA)

IB,

I

0.01

0.001
–55 –25 0 25 50 75 100 125 0 5.0 10 15 20 25

TA, AMBIENT TEMPERATURE (°C)

300

µ

260

220

180

140

SUPPLY CURRENT PER AMPLIFIER ( A)

D,

I

100

125°C

VCC,

25°C

–55°C



VEE

, SUPPLY VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA

3