LMC6442AIMX NSC [National Semiconductor], LMC6442AIMX Datasheet

LMC6442AIMX

Manufacturer Part Number

LMC6442AIMX

Description

Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier

Manufacturer

NSC [National Semiconductor]

Datasheet

1.LMC6442AIMX.pdf (16 pages)

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LMC6442

Dual Micropower Rail-to-Rail Output Single Supply

Operational Amplifier

General Description

The LMC6442 is ideal for battery powered systems, where

very low supply current (less than one microamp per ampli-

fier) and Rail-to-Rail output swing is required. It is character-

ized for 2.2V to 10V operation, and at 2.2V supply, the

LMC6442 is ideal for single (Li-Ion) or two cell (NiCad or

alkaline) battery systems.

The LMC6442 is designed for battery powered systems that

require long service life through low supply current, such as

smoke and gas detectors, and pager or personal communi-

cations systems.

Operation from single supply is enhanced by the wide com-

mon mode input voltage range which includes the ground (or

negative supply) for ground sensing applications. Very low

(5fA, typical) input bias current and near constant supply

current over supply voltage enhance the LMC6442’s perfor-

mance near the end-of-life battery voltage.

Designed for closed loop gains of greater than plus two (or

minus one), the amplifier has typically 9.5 KHz GBWP (Gain

Bandwidth Product). Unity gain can be used with a simple

compensation circuit, which also allows capacitive loads of

up to 300 pF to be driven, as described in the Application

Notes section.

For compact assembly the LMC6442 is available in the

MSOP 8 pin package, about one half the size required by the

SOIC 8 pin package. 8 pin DIP and 8 pin SOIC are also

available.

Connection Diagram

DS100064

Top View

Features

(Typical, V

n Output Swing to within 30 mV of supply rail

n High voltage gain

n Gain Bandwidth Product

n Guaranteed for:

n Low Supply Current

n Input Voltage Range

n 2.1 µW/Amplifier

n Stable for A

Applications

n Portable instruments

n Smoke/gas/CO/fire detectors

n Pagers/cell phones

n Instrumentation

n Thermostats

n Occupancy sensors

n Cameras

n Active badges

10006440

= 2.2V)

≥+2 or A

≤ −1

Power consumption

−0.3V to V

0.95 µA/Amplifier

2.2V, 5V, 10V

www.national.com

August 2000

9.5 KHz

103 dB

-0.9V

Related parts for LMC6442AIMX

LMC6442AIMX Summary of contents

Page 1

LMC6442 Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier General Description The LMC6442 is ideal for battery powered systems, where very low supply current (less than one microamp per ampli- fier) and Rail-to-Rail output swing is required character- ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Differential Input Voltage Voltage at Input/Output Pin + − Supply Voltage (V − ...

Page 3

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter GBWP Gain-Bandwidth Product φ Phase Margin (Note 15 Electrical Characteristics Unless otherwise specified, all limits guaranteed for T ...

Page 4

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter THD Total Harmonic Distortion 10V Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the ...

Page 5

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter i Input-Referred R n Current Noise Crosstalk Rejection (Note 9) Electrical Characteristics (continued) Note 1: Absolute ...

Page 6

Typical Performance Characteristics specified (Continued) Total Supply Current vs Supply Voltage (Positive Input Overdrive) Offset Voltage vs Common Mode Voltage (V = 2.2V) S Offset Voltage vs Common Mode Voltage (V = 10V) S www.national.com V = 5V, Single Supply, ...

Page 7

Typical Performance Characteristics specified (Continued) + Swing Towards V Supply Voltage Output Source Current vs Output Voltage Maximum Output Voltage vs Load Resistance V = 5V, Single Supply 10006402 10006449 10006424 7 = 25˚C unless otherwise A ...

Page 8

Typical Performance Characteristics specified (Continued) Open Loop Gain/Phase vs Frequency Open Loop Gain/Phase vs Frequency For Various 100 KΩ Phase Margin (Worst Case) vs Supply Voltage www.national.com V = 5V, Single Supply ...

Page 9

Typical Performance Characteristics specified (Continued) PSRR vs Frequency Negative Slew Rate vs Supply Voltage Input Voltage Noise vs Frequency V = 5V, Single Supply 10006415 10006411 10006416 9 = 25˚C unless otherwise A Positive Slew Rate vs Supply ...

Page 10

Typical Performance Characteristics specified (Continued) THD+N vs Frequency Maximum Output Swing vs Frequency Large Signal Step Response (A =+2) (C =100 pF www.national.com V = 5V, Single Supply 10006428 (A 10006453 (A = − ...

Page 11

Typical Performance Characteristics specified (Continued) Small Signal Step Response ( For Various C V Applications Information USING LMC6442 IN UNITY GAIN APPLICATIONS LMC6442 is optimized for maximum bandwidth and minimal external components when operating at a minimum ...

Page 12

Applications Information FIGURE 3. “T” Network Values for Various Values of R For convenience, Fig. 3 shows DESIGN CONSIDERATIONS FOR CAPACITIVE LOADS As with many other opamps, the LMC6442 is more stable at higher closed ...

Page 13

Application Circuits Micropower Single Supply Voltage to Frequency Converter + < 5V: I 10µA, f/V = 4.3 (Hz/ Gain Stage with Current Boosting 10006454 13 10006445 10006446 www.national.com ...

Page 14

... Application Circuits Ordering Information Temperature Range Package Industrial −40˚C to +85˚C 8-pin SO-8 LMC6442AIM, LMC6442IM LMC6442AIMX, LMC6442IMX MSOP LMC6442AIMM, LMC6442AIMMX, LMC6442IMM, LMC6442IMMX LMC6442AIMMX, LMC6442IMMX 8-pin DIP LMC6442AIN, LMC6442IN 8-pin CDIP - 10-pin SO - www.national.com (Continued) Offset Nulling Schemes Military −55˚C to +125˚C ...

Page 15

... Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC Order Number LMC6442AIM or LMC6442IM or LMC6442AIMX or LMC6442IMX 8-Lead (0.300" Wide) Molded Dual-In-Line Package Order Number LMC6442AIN or LMC6442IN or LMC6442INX NS Package Number M08A NS Package Number N08E 15 www.national.com ...

Page 16

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead (0.118" Wide) Molded Mini Small Outline Package Order Number LMC6442AIMM or LMC6442IMM or LMC6442AIMMX or LMC6442IMMX National does not assume any responsibility for use of any circuitry described, no circuit patent ...

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