LMC7211BIM5X [TI]

具有推挽输出的低功耗高电压比较器 | DBV | 5 | -40 to 85;


型号：	LMC7211BIM5X
厂家：	TEXAS INSTRUMENTS
描述：	具有推挽输出的低功耗高电压比较器 \| DBV \| 5 \| -40 to 85 放大器光电二极管比较器
文件：	总18页 (文件大小：431K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LMC7211

LMC7211 Tiny CMOS Comparator with Rail-to-Rail Input and Push-Pull Output

Literature Number: SNOS746E

January 26, 2010

LMC7211

Tiny CMOS Comparator with Rail-to-Rail Input and Push-

Pull Output

General Description

Features

The LMC7211 is a micropower CMOS comparator available

in the space saving SOT23-5 package. This makes the com-

parator ideal for space and weight critical designs. The

LMC7211 is supplied in two offset voltage grades, 5 mV and

15 mV.

Tiny SOT 23-5 package saves space

■

Package is less than 1.43 mm thick

Guaranteed specs at 2.7V, 5V, 15V supplies

Typical supply current 7 μA at 5V

Response time of 4 μs at 5V

Push-pull output

■

The main benefits of the Tiny package are most apparent in

small portable electronic devices, such as mobile phones,

pagers, notebook computers, personal digital assistants, and

PCMCIA cards. The rail-to-rail input voltage makes the

LMC7211 a good choice for sensor interfacing, such as light

detector circuits, optical and magnetic sensors, and alarm

and status circuits.

Input common-mode range beyond V− and V+

Low input current

Applications

Battery Powered Products

■

The Tiny Comparator's outside dimensions (length x width x

height) of 3.05mm x 3.00mm x 1.43mm allow it to fit into tight

spaces on PC boards.

Notebooks and PDAs

PCMCIA cards

See the LMC7221 for a comparator with an open-drain output.

Mobile Communications

Alarm and Security circuits

Direct Sensor Interface

Replaces amplifiers used as comparators with better

performance and lower current

Connection Diagrams

8-Pin SO-8

5-Pin SOT23-5

1233701

1233702

Top View

12337

www.national.com

Storage Temperature Range

Junction Temperature

ꢀ(Note 4)

−65°C to +150°C

150°C

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Operating Ratings (Note 1)

Supply Voltage

ESD Tolerance (Note 2)

Differential Input Voltage

Voltage at Input/Output Pin

Supply Voltage (V⁺–V⁻)

Current at Input Pin (Note 7)

Current at Output Pin

ꢀ(Note 3, Note 8)

2 kV

(V_CC) +0.3V to (−V_CC)−0.3V

(V_CC) + 0.3V to (−V_CC)−0.3V

2.7 ≤ V_CC≤ 15V

Junction Temperature Range

LMC7211AI, LMC7211BI

−40°C ≤T_J≤+85°C

16V

±5 mA

Thermal Resistance (θ_JA

SO-8 Package,

)

8-Pin Surface Mount

M05A Package,

5-Pin Surface Mount

180°C/W

325°C/W

±30 mA

40 mA

Current at Power Supply Pin

Lead Temperature

(soldering, 10 sec)

260°C

2.7V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T_J= 25°C, V⁺= 2.7V, V⁻= 0V, V_CM= V_O= V+/2. Boldface limits apply at the

temperature extremes.

Typ

LMC7211AI

LMC7211BI

Limit

Symbol

V_OS

Parameter

Conditions

(Note 5)

Limit

Units

(Note 6)

Input Offset Voltage

max

TCV_OS

Input Offset Voltage

Temperature Drift

Input Offset Voltage

Average Drift

1.0

3.3

μV/°C

(Note 10)

μV/Month

I_B

Input Current

0.04

0.02

I_OS

Input Offset Current

Common Mode

CMRR

0V ≤ V_CM≤ 2.7V

2.7V ≤ V⁺≤ 15V

Rejection Ratio

Power Supply

PSRR

Rejection Ratio

Voltage Gain

A_V

100

3.0

CMVR

Input Common-Mode

Voltage Range

CMRR > 55 dB

I_load= 2.5 mA

V_OUT= Low

2.9

2.7

−0.2

0.0

2.4

2.3

0.3

0.4

2.9

2.7

−0.2

0.0

2.4

2.3

0.3

0.4

min

−0.3

2.5

0.2

max

V_OH

V_OL

I_S

Output Voltage High

Output Voltage Low

Supply Current

min

max

μA

max

www.national.com

5.0V and 15.0V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T_J= 25°C, V⁺= 5.0V and 15V, V⁻= 0V, V_CM= V_O= V⁺/2. Boldface limits

apply at the temperature extremes.

Typ

LMC7211AI

LMC7211BI

Limit

Symbol

V_OS

Parameter

Conditions

(Note 5)

Limit

Units

(Note 6)

Input Offset Voltage

max

TCV_OS

Input Offset Voltage

Temperature Drift

Input Offset Voltage

Average Drift

V⁺= 5V

1.0

4.0

3.3

4.0

0.04

0.02

μV/°C

V⁺= 15V

V⁺= 5V

μV/Month

V⁺= 15V

I_B

Input Current

I_OS

Input Offset Current

Common Mode

Rejection Ration

Power Supply

CMRR

V+ = 5.0V

V+ = 15.0V

5V ≤ V⁺≤ 10V

PSRR

Rejection Ratio

Voltage Gain

A_V

100

5.3

CMVR

Input Common-Mode

Voltage Range

V+ = 5.0V

5.2

5.0

5.2

5.0

min

CMRR > 55 dB

V+ = 5.0V

−0.3

15.3

−0.3

4.8

−0.2

0.0

−0.2

0.0

CMRR > 55 dB

V+ = 15.0V

CMRR > 55 dB

V+ = 15.0V

CMRR > 55 dB

V+ = 5V

max

15.2

15.0

−0.2

0.0

15.2

15.0

−0.2

0.0

min

max

min

V_OH

Output Voltage High

Output Voltage Low

4.6

I_load= 5 mA

4.45

V+ = 15V

14.8

0.2

14.6

min

I_load= 5 mA

14.45

V_OL

V+ = 5V

0.40

I_load= 5 mA

0.55

max

V+ = 15V

0.40

I_load= 5 mA

0.55

max

I_S

Supply Current

V_OUT= Low

μA

max

I_SC

Short Circuit Current

Sourcing

Sinking (Note 8)

www.national.com

AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T_J= 25°C, V⁺= 5V, V⁻= 0V, V_CM= V_O= V⁺/2. Boldface limits apply at the

temperature extreme.

Typ

LMC7211AI

Limit

LMC7211BI

Limit

Symbol

t_rise

Parameter

Rise Time

Conditions

(Note 5)

Units

μs

(Note 6)

f = 10 kHz, Cl = 50 pF,

0.3

Overdrive = 10 mV (Note 9)

f = 10 kHz, Cl = 50 pF,

t_fall

Fall Time

μs

Overdrive = 10 mV (Note 9)

t_PHL

Propagation Delay

(High to Low)

(Note 11)

f = 10 kHz,

Cl = 50 pF

(Note 9)

10 mV

μs

100 mV

V+ = 2.7V,

f = 10 kHz,

Cl = 50 pF

(Note 9)

10 mV

μs

100 mV

t_PLH

Propagation Delay

(Low to High)

(Note 11)

f = 10 kHz,

Cl = 50p

10 mV

μs

100 mV

(Note 9)

V+ = 2.7V,

f = 10 kHz,

Cl = 50 pF

(Note 9)

10 mV

100 mV

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

Note 2: Human body model, 1.5 kΩ in series with 100 pF.

Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the

maximum allowed junction temperature of 150°C. Output currents in excess of ±30 mA over long term may adversely affect reliability.

Note 4: The maximum power dissipation is a function of T_J(max), θ_JA, and T_A. The maximum allowable power dissipation at any ambient temperature is

P_D= (T_J(max)− T_A)/θ_JA.All numbers apply for packages soldered directly into a PC board.

Note 5: Typical values represent the most likely parametric norm.

Note 6: All limits are guaranteed by testing or statistical analysis.

Note 7: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage rating.

Note 8: Do not short circuit output to V+, when V+ is greater than 12V or reliability will be adversely affected.

Note 9: C_Lincludes the probe and jig capacitance.

Note 10: Input offset voltage average drift is calculated by dividing the accelerated operating life V_OSdrift by the equivalent operational time. This represents

worst case input conditions and includes the first 30 days of drift.

Note 11: Input step voltage for propagation delay measurement is 2V.

Ordering Information

Package

Ordering

Information

NSC Drawing

Number

Package

Marking

LM7211AIM

LM7211BIM

C00A

Transport Media

LMC7211AIM

LMC7211AIMX

LMC7211BIM

LMC7211BIMX

LMC7211AIM5

LMC7211AIM5X

LMC7211BIM5

LMC7211BIM5X

M08A

Rails

M08A

2.5k Units Tape and Reel

Rails

8-Pin SO-8

M08A

2.5k Units tape and Reel

1k Units Tape and Reel

3k Units Tape and Reel

1k Units Tape and Reel

3k Units Tape and Reel

MF05A

C00A

5-Pin SOT 23-5

C00B

www.national.com

Typical Performance Characteristics Single Supply T_A= 25°C unless specified

Supply Current vs. Supply Voltage

Supply Current vs. Temperature while Sourcing

1233715

1233716

Supply Current vs. Temperature while Sinking

Output Sourcing Current vs. Supply Voltage

1233718

1233717

Output Sinking Current vs. Supply Voltage

Output Sourcing Current vs. Output Voltage @ 5V

1233719

1233720

www.national.com

Output Sinking Current vs. Output Voltage @ 5V

Output Sourcing Current vs. Output Voltage @ 15V

1233721

1233722

Output Sinking Current vs. Output Voltage @ 15V

Response Time for Various Input Overdrives −t_PLH

1233723

1233724

Response Time for Various Input Overdrives −t_PHL

Response Time for Various Input Overdrives −t_PLH

1233725

1233726

www.national.com

Response Time for Various Input Overdrives −t_PHL

Response Time for Various Input Overdrives −t_PLH

1233727

1233728

Response Time for Various Input Overdrives −t_PHL

Input Bias Current vs. Common Mode Voltage

1233730

1233729

Input Bias Current vs. Common Mode Voltage

1233731

1233732

www.national.com

Input Bias Current vs. Temperature

1233733

circuits previously used to match signals to the limited input

range of earlier comparators. This is useful to power supply

monitoring circuits which need to sense their own power sup-

ply, and compare it to a reference voltage which is close to

the power supply voltage. The wide input range can also be

useful for sensing the voltage drop across a current sense

resistor for battery chargers.

Application Information

1.0 Benefits of the LMC7211 Tiny Comparator

Size. The small footprint of the SOT 23-5 packaged Tiny

Comparator, (0.120 x 0.118 inches, 3.05 x 3.00 mm) saves

space on printed circuit boards, and enable the design of

smaller electronic products. Because they are easier to carry,

many customers prefer smaller and lighter products.

Zero Crossing Detector. Since the LMC7211's common

mode input range extends below ground even when powered

by a single positive supply, it can be used with large input

resistors as a zero crossing detector.

Height. The height (0.056 inches, 1.43 mm) of the Tiny Com-

parator makes it possible to use it in PCMCIA type III cards.

Simplified Board Layout. The Tiny Comparator can simplify

board layout in several ways. First, by placing a comparator

where comparators are needed, instead of routing signals to

a dual or quad device, long pc traces may be avoided.

Low Input Currents and High Input Impedance. These

characteristics allow the LMC7211 to be used to sense high

impedance signals from sensors. They also make it possible

to use the LMC7211 in timing circuits built with large value

resistors. This can reduce the power dissipation of timing cir-

cuits. For very long timing circuits, using high value resistors

can reduce the size and cost of large value capacitors for the

same R-C time constant.

By using multiple Tiny Comparators instead of duals or quads,

complex signal routing and possibly crosstalk can be re-

duced.

Low Supply Current. The typical 7 μA supply current of the

LMC7211 extends battery life in portable applications, and

may allow the reduction of the size of batteries in some ap-

plications.

Direct Sensor Interfacing. The wide input voltage range and

high impedance of the LMC7211 may make it possible to di-

rectly interface to a sensor without the use of amplifiers or bias

circuits. In circuits with sensors which can produce outputs in

the tens to hundreds of millivolts, the LMC7211 can compare

the sensor signal with an appropriately small reference volt-

age. This may be done close to ground or the positive supply

rail. Direct sensor interfacing may eliminate the need for an

amplifier for the sensor signal. Eliminating the amplifier can

save cost, space, and design time.

Wide Voltage Range. The LMC7211 is characterized at 15V,

5V and 2.7V. Performance data is provided at these popular

voltages. This wide voltage range makes the LMC7211 a

good choice for devices where the voltage may vary over the

life of the batteries.

Digital Outputs Representing Signal Level. Comparators

provide a high or low digital output depending on the voltage

levels of the (+) and (−) inputs. This makes comparators use-

ful for interfacing analog signals to microprocessors and other

digital circuits. The LMC7211 can be thought of as a one-bit

a/d converter.

2.0 Low Voltage Operation

Comparators are the common devices by which analog sig-

nals interface with digital circuits. The LMC7211 has been

designed to operate at supply voltages of 2.7V without sacri-

ficing performance to meet the demands of 3V digital sys-

tems.

Push-Pull Output. The push-pull output of the LMC7211 is

capable of both sourcing and sinking milliamp level currents

even at a 2.7 volt supply. This can allow the LMC7211 to drive

multiple logic gates.

At supply voltages of 2.7V, the common-mode voltage range

extends 200 mV (guaranteed) below the negative supply.

This feature, in addition to the comparator being able to sense

signals near the positive rail, is extremely useful in low voltage

applications.

Driving LEDs (Light Emitting Diodes). With a 5 volt power

supply, the LMC7211's output sinking current can drive small,

high efficiency LEDs for indicator and test point circuits. The

small size of the Tiny package makes it easy to find space to

add this feature to even compact designs.

Input range to Beyond Rail to Rail. The input common

mode range of the LMC7211 is slightly larger than the actual

power supply range. This wide input range means that the

comparator can be used to sense signals close to the power

supply rails. This wide input range can make design easier by

eliminating voltage dividers, amplifiers, and other front end

www.national.com

1233705

1233707

FIGURE 1. Even at Low-Supply Voltage of 2.7V, an Input

Signal which Exceeds the Supply Voltages Produces No

Phase Inversion at the Output

FIGURE 3. Measurement of the Shoot-Through Current

From Figure 3, the shoot-through current for the LMC7211

can be calculated to be 0.2 mA (typical), and the duration is

1 μs. The values needed for the bypass capacitors can be

calculated as follows:

At V⁺= 2.7V propagation delays are t_PLH= 4 μs and t_PHL= 4

μs with overdrives of 100 mV.

Please refer to the performance curves for more extensive

characterization.

3.0 Shoot-Through Current

The shoot-through current is defined as the current surge,

above the quiescent supply current, between the positive and

negative supplies of a device. The current surge occurs when

the output of the device switches states. The shoot-through

current results in glitches in the supply voltages. Usually,

glitches in the supply lines are prevented by bypass capaci-

tors. When the glitches are minimal, the value of the bypass

capacitors can be reduced.

1233708

Area of Δ

= ½ (1 μs × 200 μA)

= 100 pC

The capacitor needs to supply 100 picocolumb. To avoid large

shifts in the comparator threshold due to changes in the volt-

age level, the voltage drop at the bypass capacitor should be

limited to 100 mV or less.

The charge needed (100 picocolumb) and the allowable volt-

age drop (100 mV) will give us the minimum capacitor value

required.

= C (ΔV)

ΔQ

C = ΔQ/ΔV = 100 picocolumb/100 mV

C = 10^-10/10^-1= 10^-9= 1 nF = 0.001 μF

10^-9= 1 nF = 0.001 μF

The voltage drop of ∼100 mV will cause a threshold shift in

the comparator. This threshold shift will be reduced by the

power supply rejection ratio, (PSRR). The PSRR which is ap-

plicable here is not the DC value of PSRR (∼80 dB), but a

transient PSRR which will be usually about 20 dB–40 dB, de-

pending on the circuit and the speed of the transient. This will

result in an effective threshold shift of about 1 mV to 10 mV.

1233706

FIGURE 2. Circuit for Measurement of the

Shoot-Through Current

For precision and level sensing circuits, it is generally a good

goal to reduce the voltage delta on the power supply to a value

equal to or less than the hysteresis of the comparator circuit.

If the above circuit was to be used with 50 mV of hysteresis,

it would be reasonable to increase the bypass capacitor to

0.01 μF to reduce the voltage delta to 10 mV. Larger values

may be useful for obtaining more accurate and consistent

switching.

Note that the switching current of the comparator can spread

to other parts of the board as noise. The bypass capacitor

reduces this noise. For low noise systems this may be reason

to make the capacitor larger.

www.national.com

With Positive Feedback

(Hysteresis or Memory)

For non-precision circuits, such as using a comparator to de-

termine if a push-button switch is on or off, it is often cheaper

and easier to use a larger value of hysteresis and a small

value or bypass capacitance. The low shoot-through current

of the LMC7211 can allow the use of smaller and less expen-

sive bypass capacitors in non-critical circuits.

4.0 Output Short Circuit Current

The LMC7211 has short circuit protection of 40 mA. However,

it is not designed to withstand continuous short circuits, tran-

sient voltage or current spikes, or shorts to any voltage be-

yond the supplies. A resistor in series with the output should

reduce the effect of shorts. For outputs which send signals off

PC boards additional protection devices, such as diodes to

the supply rails, and varistors may be used.

5.0 Hysteresis

1233711

If the input signal is very slow or very noisy, the comparator

output might trip several times as the input signal passes

through the threshold. Using positive feedback to add hys-

teresis to the switching can reduce or eliminate this problem.

The positive feedback can be added by a high value resistor

(R_F). This will result in two switching thresholds, one for in-

creasing signals and one for decreasing signals. A capacitor

can be added across R_Fto increase the switching speed and

provide more short term hysteresis. This can result in greater

noise immunity for the circuit.

FIGURE 6.

6.0 Input Protection

If input signals are like to exceed the common mode range of

the LMC7211, or it is likely that signals may be present when

power is off, damage to the LMC7211 may occur. Large value

(100 kΩ to MΩ) input resistors may reduce the likelihood of

damage by limiting the input currents. Since the LMC7211

has very low input leakage currents, the effect on accuracy

will be small. Additional protection may require the use of

diodes, as shown in Figure 7. Note that diode leakage current

may affect accuracy during normal operation. The R-C time

constant of R_INand the diode capacitance may also slow re-

sponse time.

See Figure 4, Figure 5 and Figure 6.

Note that very heavy loading of the comparator output, such

as LED drive or bipolar logic gates, will change the output

voltage and shift the voltage thresholds.

1233709

R_F≫ R₁and

R_F≫ R₂

1233712

FIGURE 4. Positive Feedback for Hysteresis

FIGURE 7.

Without Positive Feedback

(No Hysteresis)

7.0 Layout Considerations

The LMC7211 is not an especially fast comparator, so high

speed design practices are not required. The LMC7211 is ca-

pable of operating with very high impedance inputs, so pre-

cautions should be taken to reduce noise pickup with high

impedance (∼ 100 kΩ and greater) designs and in electrically

noisy environments.

Keeping high value resistors close to the LMC7211 and min-

imizing the size of the input nodes is a good practice. With

multilayer designs, try to avoid long loops which could act as

inductors (coils). Sensors which are not close to the com-

parator may need twisted pair or shielded connections to

reduce noise.

1233710

FIGURE 5.

www.national.com

8.0 Open Drain Output, Dual Versions

LMC7111 Low power 50 kHz gain-bandwidth rail-to-rail in-

put and output amplifier with 25 μA typical current

specified at 2.7V, 3.0V, 3.3V, 5V and 10V.

The LMC7221 is a comparator similar to the LMC7211, but

with an open drain output which allows the output voltage to

be different (higher or lower) than the supply voltage. The

open drain output is like the open collector output of a logic

gate. This makes the LMC7221 very useful for mixed voltage

systems. Many systems will have different voltages for the

analog and microprocessor sections. Please see the

LMC7221 datasheet for details.

LM7131 Tiny Video amp with 70 MHz gain bandwidth 3V,

5V and ±5V specifications.

LP2980

Micropower SOT 50 mA Ultra Low-Dropout Reg-

ulator.

LM4040 Precision micropower shunt voltage reference.

Fixed voltages of 2.500V, 4.096V, 5.000V,

8.192V and 10.000V.

The performance of the LMC7211 is available in dual devices.

Please see the LMC6762 datasheet for details on a dual

push-pull output device. For a dual device with open drain

outputs, please see the LMC6772 datasheet.

LM4041 Precision micropower shut voltage reference

1.225V and adjustable.

LM385

Low current voltage reference. Fixed Voltages of

1.2V and 2.5V.

Rail-to-Rail Input Low Power Comparators—

ꢀꢀꢀPush-Pull Output

Contact your National Semiconductor representative for the

latest information.

LMC7211

SOT23-5, SO-8

Single

Dual

LMC6762

SO-8,

10.0 Spice Macromodel

A Spice Macromodel is available for the LMC7211 compara-

tor on the National Semiconductor Amplifier Macromodel

disk. Contact your National Semiconductor representative to

obtain the latest version.

ꢀꢀꢀOpen Drain Output

LMC7221

SOT23-5, SO-8

Single

Dual

LMC6772

SO-8, DIP

9.0 Additional SOT23-5 Tiny Devices

National Semiconductor has additional parts available in the

space saving SOT23 Tiny package, including amplifiers, volt-

age references, and voltage regulators. These devices in-

clude—

LMC7101 1 MHz gain-bandwidth rail-to-rail input and output

amplifier—high input impedance and high gain

700 μA typical current 2.7V, 3V, 5V and 15V spec-

ifications.

www.national.com

SOT-23-5 Tape and Reel Specification

REEL DIMENSIONS

1233713

8 mm

7.00 0.059 0.512 0.795 2.165 0.331 + 0.059/−0.000 0.567 W1+ 0.078/−0.039

330.00 1.50 13.00 20.20 55.00

8.40 + 1.50/−0.00

14.40

W1 + 2.00/−1.00

Tape Size

TAPE FORMAT

Tape Section

Leader

# Cavities

0 (min)

75 (min)

3000

Cavity Status

Empty

Cover Tape Status

Sealed

(Start End)

Carrier

Empty

Sealed

Filled

Sealed

1000

Filled

Sealed

Trailer

125 (min)

0 (min)

Empty

Sealed

(Hub End)

Empty

Sealed

www.national.com

Tape Dimensions

1233714

8 mm

0.130 0.124 0.130 0.126

(3.3) (3.15) (3.3) (3.2)

Tape Size DIM A DIM Ao DIM B DIM Bo

0.138 ± 0.002

(3.5 ± 0.05)

DIM F

0.055 ± 0.004

(1.4 ± 0.11)

DIM Ko

0.157

(4)

0.315 ±0.012

(8 ± 0.3)

DIM P1

DIM W

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted

5-Pin SOT Package

NS Package Number MF05A

8-Pin Small Outline Package

NS Package Number M08A

www.national.com

Notes

www.national.com

Notes

For more National Semiconductor product information and proven design tools, visit the following Web sites at:

www.national.com

Products

www.national.com/amplifiers

Design Support

www.national.com/webench

Amplifiers

WEBENCH® Tools

App Notes

Audio

www.national.com/audio

www.national.com/timing

www.national.com/adc

www.national.com/interface

www.national.com/lvds

www.national.com/power

www.national.com/appnotes

www.national.com/refdesigns

www.national.com/samples

www.national.com/evalboards

www.national.com/packaging

www.national.com/quality/green

www.national.com/contacts

www.national.com/quality

www.national.com/feedback

www.national.com/easy

Clock and Timing

Data Converters

Interface

Reference Designs

Samples

Eval Boards

LVDS

Packaging

Power Management

Green Compliance

Distributors

Switching Regulators www.national.com/switchers

LDOs

www.national.com/ldo

www.national.com/led

www.national.com/vref

www.national.com/powerwise

Quality and Reliability

Feedback/Support

Design Made Easy

Applications & Markets

Mil/Aero

LED Lighting

Voltage References

PowerWise® Solutions

www.national.com/solutions

www.national.com/milaero

www.national.com/solarmagic

www.national.com/training

Serial Digital Interface (SDI) www.national.com/sdi

Temperature Sensors

PLL/VCO

www.national.com/tempsensors SolarMagic™

www.national.com/wireless

PowerWise® Design

University

THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION

(“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY

OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO

SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS,

IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS

DOCUMENT.

TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT

NATIONAL’S PRODUCT WARRANTY. EXCEPT WHERE MANDATED BY GOVERNMENT REQUIREMENTS, TESTING OF ALL

PARAMETERS OF EACH PRODUCT IS NOT NECESSARILY PERFORMED. NATIONAL ASSUMES NO LIABILITY FOR

APPLICATIONS ASSISTANCE OR BUYER PRODUCT DESIGN. BUYERS ARE RESPONSIBLE FOR THEIR PRODUCTS AND

APPLICATIONS USING NATIONAL COMPONENTS. PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE

NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING AND OPERATING SAFEGUARDS.

EXCEPT AS PROVIDED IN NATIONAL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, NATIONAL ASSUMES NO

LIABILITY WHATSOEVER, AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE SALE

AND/OR USE OF NATIONAL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR

PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY

RIGHT.

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR

SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL

COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and

whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected

to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform

can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness.

National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other

brand or product names may be trademarks or registered trademarks of their respective holders.

For the most current product information visit us at www.national.com

National Semiconductor

Americas Technical

Support Center

National Semiconductor Europe

Technical Support Center

Email: europe.support@nsc.com

National Semiconductor Asia

Pacific Technical Support Center

Email: ap.support@nsc.com

National Semiconductor Japan

Technical Support Center

Email: jpn.feedback@nsc.com

Email: support@nsc.com

Tel: 1-800-272-9959

www.national.com

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,

and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should

obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are

sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard

warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where

mandated by government requirements, testing of all parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and

applications using TI components. To minimize the risks associated with customer products and applications, customers should provide

adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,

or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information

published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a

warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual

property of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied

by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive

business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional

restrictions.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all

express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not

responsible or liable for any such statements.

TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably

be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing

such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and

acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products

and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be

provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in

such safety-critical applications.

TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are

specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military

specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at

the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.

TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are

designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated

products in automotive applications, TI will not be responsible for any failure to meet such requirements.

Following are URLs where you can obtain information on other Texas Instruments products and application solutions:

Products

Audio

Applications

www.ti.com/audio

amplifier.ti.com

dataconverter.ti.com

www.dlp.com

Communications and Telecom www.ti.com/communications

Amplifiers

Data Converters

DLP® Products

DSP

Computers and Peripherals

Consumer Electronics

Energy and Lighting

Industrial

www.ti.com/computers

www.ti.com/consumer-apps

www.ti.com/energy

dsp.ti.com

www.ti.com/industrial

www.ti.com/medical

www.ti.com/security

Clocks and Timers

Interface

www.ti.com/clocks

interface.ti.com

logic.ti.com

Medical

Security

Logic

Space, Avionics and Defense www.ti.com/space-avionics-defense

Transportation and Automotive www.ti.com/automotive

Power Mgmt

Microcontrollers

RFID

power.ti.com

microcontroller.ti.com

www.ti-rfid.com

Video and Imaging

www.ti.com/video

OMAP Mobile Processors www.ti.com/omap

Wireless Connectivity www.ti.com/wirelessconnectivity

TI E2E Community Home Page

e2e.ti.com

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

LMC7211BIM5X [TI]

相关型号：

LMC7211BIM5X/NOPB

LMC7211BIMX

LMC7211BIMX/NOPB

LMC7211BIMX/NOPB

LMC7211BIN

LMC7215

LMC7215

LMC7215-Q1

LMC7215IM

LMC7215IM/NOPB

LMC7215IM5

LMC7215IM5