NSC LM614CN, LM614AIN Datasheet

December 2001

LM614 Quad Operational Amplifier and Adjustable Reference

General Description

The LM614 consists of four op-amps and a programmable voltage reference in a 16-pin package. The op-amp out-performs most single-supply op-amps by providing higher speed and bandwidth along with low supply current. This device was specifically designed to lower cost and board space requirements in transducer, test, measurement and data acquisition systems.

Combining a stable voltage reference with four wide output swing op-amps makes the LM614 ideal for single supply transducers, signal conditioning and bridge driving where large common-mode-signals are common. The voltage reference consists of a reliable band-gap design that maintains low dynamic output impedance (1Ω typical), initial tolerance (2.0%), and the ability to be programmed from 1.2V to 5.0V via two external resistors. The voltage reference is very stable even when driving large capacitive loads, as are commonly encountered in CMOS data acquisition systems.

As a member of National’s new Super-Block LM614 is a space-saving monolithic alternative to a multichip solution, offering a high level of integration without sacrificing performance.

™

family, the

Connection Diagram

Features

Op Amp

n Low operating current: 450µA n Wide supply voltage range: 4V to 36V n Wide common-mode range: V n Wide differential input voltage:

Reference

n Adjustable output voltage: 1.2V to 5.0V n Initial tolerance: n Wide operating current range: 17µA to 20mA n Tolerant of load capacitance

2.0%

−

to (V+− 1.8V)

36V

Applications

n Transducer bridge driver and signal processing n Process and mass flow control systems n Power supply voltage monitor n Buffered voltage references for A/D’s

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Ordering Information

Temperature

Package

16-Pin Wide Body SOIC

Super-Block™is a trademark of National Semiconductor Corporation.

Range Part Number Package Marking Transport Media NSC Drawing

0˚C to 70˚C LM614CWM LM614CWM Rails M16B

LM614CWMX LM614CWM 1k Units Tape and Reel

−40˚C to 85˚C LM614IWM LM614IWM Rails LM614IWMX LM614IWM 1k Units Tape and Reel

Absolute Maximum Ratings (Note 1)

LM614

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

Voltage on Any Pins except V

(referred to V−pin) (Note 2) 36V (Max) (Note 3) −0.3V (Min)

Current through Any Input Pin &

20 mA

Differential Input Voltage

LM614I LM614C

Electrical Characteristics

These specifications apply for V−= GND = 0V, V+= 5V, VCM=V unless otherwise specified. Limits in standard typeface are for T

Temperature Range .

Symbol Parameter Conditions Typ

OPERATIONAL AMPLIFIER

OS1

OS2

Total Supply R

LOAD

Current 4V ≤ V Supply Voltage Range 2.2 2.8 V min

VOSOver Supply 4V ≤ V+≤ 36V 1.5 5.0 mV max

(4V ≤ V

VOSOver V

VCM= 0V through VCM= 1.0 5.0 mV max

− 1.8V), V+= 30V 1.5 7.0 mV max

Average VOSDrift (Note 7)

Input Bias Current 10 35 nA max

Input Offset Current 0.2 4 nA max

Average Offset Drift Current

Storage Temperature Range −65˚C ≤ T

≤ +150˚C

Maximum Junction Temperature 150˚C Thermal Resistance,

Junction-to-Ambient (Note 4) 150˚C Soldering Information (Soldering,

10 sec.) 220˚C ESD Tolerance (Note 5)

1kV

Operating Temperature Range

LM614I −40˚C ≤ TJ≤ +85˚C

± ±

36V 32V

LM614C 0˚C ≤ T

= 2.5V, IR= 100µA, FEEDBACK pin shorted to GND,

OUT

= 25˚C; limits in Boldface type apply over the Operating

LM614I

(Note 6)

LM614C

Limits

(Note 7)

=∞, 450 1000 µA max

≤ 36V (32V for LM614C) 550 1070 µA max

2.9 3 V min

46 32 V max 43 32 V max

≤ 32V for LM614C) 2.0 7.0 mV max

11 40 nA max

0.3 5 nA max

4 pA/˚C

≤ +70˚C

Units

µV/˚C

max

Input Resistance Differential 1800 MΩ

Common-Mode 3800 MΩ

Input Capacitance Common-Mode Input 5.7 pF Voltage Noise f = 100 Hz, Input Referred 74

Current Noise f = 100 Hz, Input Referred 58

CMRR Common-Mode V+= 30V, 0V ≤ VCM≤ (V+− 1.8V), 95 75 dB min

Rejection Ratio CMRR = 20 log (∆V

PSRR Power Supply 4V ≤ V

≤ 30V, VCM=V+/2, 110 75 dB min

Rejection Ratio PSRR = 20 log (∆V

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/∆VOS) 90 70 dB min

/∆VOS) 100 70 dB min

Electrical Characteristics (Continued)

These specifications apply for V−= GND = 0V, V+= 5V, VCM=V unless otherwise specified. Limits in standard typeface are for T

Temperature Range .

Symbol Parameter Conditions Typ

SR Slew Rate V

GBW Gain Bandwidth C

OUT

SINK

SHORT

Open Loop RL=10kΩto GND, V+= 30V, 500 94 V/mV Voltage Gain 5V ≤ V

≤ 25V 50 40 min

OUT

= 30V (Note 8)

= 50 pF 0.8 MHz

Output Voltage RL=10kΩto GND V+− 1.4 V+− 1.8 V min Swing High V Output Voltage RL=10kΩto V Swing Low V Output Source V

Output Sink V Current V Short Circuit Current V

= 36V (32V for LM614C) V+− 1.6 V+− 1.9 V min

= 36V (32V for LM614C) V−+ 0.9 V−+ 1.0 V max

= 2.5V, V

OUT

= −0.3V 15 13 mA min

−IN

= 1.6V, V

OUT

= 0.3V 98mA min

−IN

= 0V, V

OUT

= 2V, Source 40 60 mA max

−IN

= 5V, V

OUT

= 3V, Sink 32 90 mA max

−IN

+IN

VOLTAGE REFERENCE

Voltage Reference (Note 9) 1.244 1.2191 V min

Average Temperature (Note 10) 10 150 PPM/˚C Drift max Hysteresis (Note 11)

= 2.5V, IR= 100µA, FEEDBACK pin shorted to GND,

OUT

= 25˚C; limits in Boldface type apply over the Operating

= 0V, 25 16 mA min

= 0V, 17 13 mA min

= 3V, 30 50 mA max

= 2V, 30 70 mA max

(Note 6)

LM614I

LM614C

Units

Limits

(Note 7)

0.70

0.65

0.50 V/µs

0.45

0.52 MHz

V−+ 0.8 V−+ 0.95 V max

1.2689 V max

(

2.0%)

3.2 µV/˚C

LM614

VRChange V with Current 0.1 1.1 mV max

V (Note 12) 2.0 5.5 mV max

R Resistance ∆V

∆V VRChange V with High V

(3.76V between Anode and 2.8 10 mV max

FEEDBACK) VRChange with V

Change (V+= 32V for LM614C) 0.1 1.3 mV max

FEEDBACK Bias V Current 29 55 nA max

Voltage Noise BW = 10 Hz to 10 kHz, 30 µV

R(100 µA)−VR(17 µA)

R(10 mA)−VR(100 µA)

R(10→0.1 mA) R(100→17 µA)

R(Vro = Vr)−VR(Vro = 5.0V)

R(V + = 5V)−VR(V + = 36V)

R(V + = 5V)−VR(V + = 3V)

/9.9 mA 0.2 0.56 Ω max /83 µA 0.6 13 Ω max

0.05 1 mV max

1.5 5 mV max

2.5 7 mV max

0.1 1.2 mV max

0.01 1 mV max

0.01 1.5 mV max

≤ VFB≤ 5.06V 22 50 nA max

ANODE

RMS

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Electrical Characteristics (Continued)

These specifications apply for V−= GND = 0V, V+= 5V, VCM=V

LM614

unless otherwise specified. Limits in standard typeface are for T

Temperature Range .

Symbol Parameter Conditions Typ

RO=VR

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device beyond its rated operating conditions.

Note 2: Input voltage above V Note 3: More accurately, it is excessive current flow, with resulting excess heating, that limits the voltages on all pins. When any pin is pulled a diode drop below

−

, a parasitic NPN transistor turns ON. No latch-up will occur as long as the current through that pin remains below the Maximum Rating. Operation is undefined

and unpredictable when any parasitic diode or transistor is conducting. Note 4: Junction temperature may be calculated usingT

soldered to copper-clad board with dissipation from one comparator or reference output transistor, nominal θ

Note 5: Human body model, 100 pF discharged through a 1.5 kΩ resistor. Note 6: Typical values in standard typeface are for T

most likely parametric norm.

Note 7: All limits are guaranteed at room temperature (standard type face) or at operating temperature extremes (bold type face). Note 8: Slew rate is measured with op amp in a voltage follower configuration. For rising slew rate, the input voltage is driven from 5V to 25V,and the output voltage

transition is sampled at 10V and

Note 9: V Note 10: Average reference drift is calculated from the measurement of the reference voltage at 25˚C and at the temperature extremes. The drift, in ppm/˚C, is

10 is guaranteed by design and sample testing.

Note 11: Hysteresis is the change in V hysteresis to the typical value, cycle its junction temperature in the following pattern, spiraling in toward 25˚C: 25˚C, 85˚C, −40˚C, 70˚C, 0˚C, 25˚C.

Note 12: Low contact resistance is required for accurate measurement.

is the Cathode-feedback voltage, nominally 1.244V.

∆VR/(V

•

∆TJ), where ∆VRis the lowest value subtracted from the highest, V

•

R[25˚C]

is allowed.

J=TA+PDθjA

= 25˚C; values in boldface type apply for the full operating temperature range. These values represent the

20V.For falling slew rate, the input voltage is driven from 25V to 5V, and the output voltage transition is sampled at 20V and 10V.

caused by a change in TJ, after the reference has been “dehysterized”. To dehysterize the reference; that is minimize the

. Thegiventhermalresistance is worst-case for packages in sockets in still air.For packages

Typical Performance Characteristics (Reference) T

= 0V, unless otherwise noted

Reference Voltage vs.

Temperature on 5 Representative Units Reference Voltage Drift

= 2.5V, IR= 100µA, FEEDBACK pin shorted to GND,

OUT

= 25˚C; limits in Boldface type apply over the Operating

LM614I

(Note 6)

LM614C

Limits

(Note 7)

is 90˚C/W for the WM package.

is the value at 25˚C, and ∆TJis the temperature range. This parameter

R[25˚C]

= 25˚C, FEEDBACK pin shorted to V

Units

−

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Typical Performance Characteristics (Reference) T

= 25˚C, FEEDBACK pin shorted to V

= 0V, unless otherwise noted (Continued)

Accelerated Reference Voltage Drift vs. Time Reference Voltage vs. Current and Temperature

LM614

−

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Reference Voltage vs. Current and Temperature Reference Voltage vs. Reference Current

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Reference Voltage vs. Reference Current Reference AC Stability Range

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Typical Performance Characteristics (Reference) T

= 0V, unless otherwise noted (Continued)

LM614

FEEDBACK Current vs. FEEDBACK-to-Anode Voltage FEEDBACK Current vs. FEEDBACK-to-Anode Voltage

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Reference Noise Voltage vs. Frequency Reference Small-Signal Resistance vs. Frequency

= 25˚C, FEEDBACK pin shorted to V

−

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Reference Power-Up Time Reference Voltage with FEEDBACK Voltage Step

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