lm611cmx National Semiconductor Corporation, lm611cmx Datasheet

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lm611cmx

Manufacturer Part Number
lm611cmx
Description
Operational Amplifier And Adjustable Reference
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2004 National Semiconductor Corporation
LM611
Operational Amplifier and Adjustable Reference
General Description
The LM611 consists of a single-supply op-amp and a pro-
grammable voltage reference in one space saving 8-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 a wide output
swing op-amp makes the LM611 ideal for single supply
transducers, signal conditioning and bridge driving where
large common-mode signals are common. The voltage ref-
erence consists of a reliable band-gap design that maintains
low dynamic output impedance (1Ω typical), excellent initial
tolerance (0.6%), and the ability to be programmed from
1.2V to 6.3V via two external resistors. The voltage refer-
ence is very stable even when driving large capacitive loads,
as are commonly encountered in CMOS data acquisition
systems.
As a member of National’s Super-Block
is a space-saving monolithic alternative to a multi-chip solu-
tion, offering a high level of integration without sacrificing
performance.
Connection Diagrams
Super-Block
is a trademark of National Semiconductor Corporation.
DS009221
family, the LM611
00922101
Features
OP AMP
n Low operating current:
n Wide supply voltage range: 4V to 36V
n Wide common-mode range: V
n Wide differential input voltage:
n Available in low cost 8-pin DIP
n Available in plastic package rated for Military
REFERENCE
n Adjustable output voltage: 1.2V to 6.3V
n Tight initial tolerance available:
n Wide operating current range: 17 µA to 20 mA
n Reference floats above ground
n Tolerant of load capacitance
Applications
n Transducer bridge driver
n Process and Mass Flow Control systems
n Power supply voltage monitor
n Buffered voltage references for A/D’s
Temperature Range Operation
300 µA (op amp)
±
±
to (V
36V
0.6%
+
−1.8V)
www.national.com
August 2000
00922102

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lm611cmx Summary of contents

Page 1

... Connection Diagrams Super-Block ™ trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Features OP AMP n Low operating current: n Wide supply voltage range 36V n Wide common-mode range: V ...

Page 2

Absolute Maximum Ratings 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 R − (referred to V pin) (Note 2) Current through Any Input Pin ...

Page 3

Electrical Characteristics − These specifications apply for V = GND = 0V, V unless otherwise specified. Limits in standard typeface are for T Temperature Range. Symbol Parameter OPERATIONAL AMPLIFIER CMRR Common-Mode Rejection-Ratio PSRR Power Supply Rejection-Ratio A Open Loop V ...

Page 4

Electrical Characteristics − These specifications apply for V = GND = 0V, V unless otherwise specified. Limits in standard typeface are for T Temperature Range. Symbol Parameter VOLTAGE REFERENCE V Change with Change V Change with R ...

Page 5

Typical Performance Characteristics (Reference 25˚C, FEEDBACK pin shorted otherwise noted Reference Voltage vs Temp on 5 Representative Units Accelerated Reference Voltage Drift vs Time Reference Voltage vs Current and Temperature − = 0V, unless 00922133 ...

Page 6

Typical Performance Characteristics (Reference) 0V, unless otherwise noted (Continued) Reference Voltage vs Reference Current Feedback Current vs Feedback-to-Anode Voltage Reference Noise Voltage vs Frequency www.national.com T J 00922139 Feedback-to-Anode Voltage 00922141 Reference Small-Signal Resistance vs Frequency 00922143 6 − = ...

Page 7

Typical Performance Characteristics (Reference) 0V, unless otherwise noted (Continued) Reference Power-Up Time Reference Voltage with 100∼12 µA Current Step Reference Voltage Change with Supply Voltage Step T J 00922145 Reference Step Response 00922147 00922149 7 = 25˚C, FEEDBACK pin shorted ...

Page 8

Typical Performance Characteristics (Op Amps) + − 5V GND = 0V 25˚C, unless otherwise noted Input Common-Mode Voltage Range vs Temperature Input Bias Current vs Common-Mode Voltage Large-Signal Step Response www.national.com + ...

Page 9

Typical Performance Characteristics (Op Amps / 25˚C, unless otherwise noted (Continued) J Output Source Current vs Output Voltage and Temp. Output Swing, Large Signal Small Signal Pulse Response vs Temp Output Sink Current ...

Page 10

Typical Performance Characteristics (Op Amps / 25˚C, unless otherwise noted (Continued Amp Voltage Noise vs Frequency Small-Signal Voltage Gain vs Frequency and Temperature Follower Small-Signal Frequency Response www.national.com + V = 5V, V ...

Page 11

Typical Performance Characteristics (Op Amps / 25˚C, unless otherwise noted (Continued) J Power Supply Current vs Power Supply Voltage Negative Power Supply Voltage Rejection Ratio Input Offset Current vs Junction Temperature + V 00922168 Slew ...

Page 12

Typical Performance Distributions Average V Drift OS Military Temperature Range Average V Drift OS Commercial Temperature Range Average I Drift OS Industrial Temperature Range www.national.com Industrial Temperature Range 00922174 Military Temperature Range 00922176 Commercial Temperature Range 00922178 12 Average V ...

Page 13

Typical Performance Distributions Voltage Reference Broad-Band Noise Distribution Op Amp Current Noise Distribution Application Information VOLTAGE REFERENCE Reference Biasing The voltage reference shunt regulator topology that models as a simple zener diode. With current I ‘forward’ direction ...

Page 14

Application Information 00922116 FIGURE 3. 1.2V Reference Capacitors in parallel with the reference are allowed. See the Reference AC Stability Range curve for capacitance values — from 20 µ any capacitor value is stable. With the reference’s ...

Page 15

Application Information I = Vr/R1 = 1.24/R1 FIGURE 9. Current Source is Programmed by R1 00922123 FIGURE 10. Proportional-to-Absolute- Temperature Current Source 00922124 FIGURE 11. Negative −TC Current Source (Continued) Hysteresis The reference voltage depends, slightly, on the thermal his- ...

Page 16

Typical Applications *10k must be low t.c. trim pot. FIGURE 13. Simple Low Quiescent Drain Voltage Regulator. Total Supply Current is approximately 320 µA when (R1/ OUT REF R1, R2 should be 1% ...

Page 17

Typical Applications (Continued) FIGURE 15. Low Drop-Out Voltage Regulator Circuit. Drop out voltage is typically 0.2V. FIGURE 16. Nulling Bridge Detection System. Adjust sensitivity via 400 kΩ pot. Null offset with R1, and bridge drive with the 10k pot. 00922131 ...

Page 18

... Op Amp 00922191 Temperature Range Industrial ≤+125˚C ≤+85˚C −40˚C≤ — — LM611IM LM611IMX 18 00922103 Bias 00922192 Package Commercial ≤+70˚C 0˚C≤T A — 8-pin ceramic DIP LM611CM 14-pin Narrow LM611CMX Surface Mount NSC Drawing J08A M14A ...

Page 19

... Physical Dimensions inches (millimeters) unless otherwise noted Plastic Surface Mount Narrow Package (0.15) (M) Order Number LM611CM, LM611CMX, LM611IM or LM611IMX Hermetic Dual-In-Line Package (J) Order Number LM611AMJ/883 NS Package Number J08A NS Package Number M14A 19 www.national.com ...

Page 20

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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