LT1490AHMS8#PBF_技术文档

LT1490A/LT1491A

Dual/Quad Over-The-Top

Micropower Rail-to-Rail

Input and Output Op Amps

FEATURES

DESCRIPTION

The LT^®1490A/LT1491A are dual and quad op amps with a

lowinputoffsetvoltageof500μVmax.TheLT1490A/LT1491A

operate on all single and split supplies with a total voltage of

2V to 44V, drawing only 40μA of quiescent current per ampli-

fier. Theseamplifiersarereversesupplyprotected;theydraw

virtually no current for reverse supply up to 18V. The input

range of the LT1490A/LT1491A includes both supplies and

the output swings to both supplies. Unlike most micropower

op amps, the LT1490A/LT1491A can drive heavy loads; their

rail-to-rail outputs drive 20mA. The LT1490A/LT1491A are

unity-gainstableanddriveallcapacitiveloadsupto10,000pF

when optional 0.22μF and 150Ω compensation is used.

n

Low Input Offset Voltage: 500μV Max

–

n

Output Swings to 10mV Max from V

n

Rail-to-Rail Input and Output

n

Micropower: 50μA/Amplifier Max

Over-The-Top^®Input Common Mode Range Extends

n

–

+

44V Above V , Independent of V

n

Specified on 3V, 5V and 15V Supplies

High Output Current: 20mA

Output Drives 10,000pF with Output Compensation

Reverse Battery Protection to 18V

No Supply Sequencing Problems

High Voltage Gain: 1500V/mV

High CMRR: 98dB

No Phase Reversal

Gain Bandwidth Product: 200kHz

Tiny 3mm × 3mm × 0.8mm DFN Package

The LT1490A/LT1491A have a unique input stage that oper-

ates and remains high impedance when above the positive

supply. The inputs take 44V both differential and common

mode even when operating on a 3V supply. Built-in resistors

protect the inputs for faults below the negative supply up to

15V. There is no phase reversal of the output for inputs 15V

below V^–or 44V above V^–, independent of V⁺.

APPLICATIONS

n

Battery- or Solar-Powered Systems

Portable Instrumentation

Sensor Conditioning

TheLT1490Adualopampisavailableinthe8-pinMSOP,PDIP

and SO packages. For space limited applications LT1490A is

available in a 3mm × 3mm × 0.8mm, dual fine pitch leadless

package (DFN). The quad LT1491A is available in the 14-pin

SO, PDIP and 5mm × 3mm × 0.8mm DFN packages.

n

Supply Current Sensing

n

Battery Monitoring

n

Micropower Active Filters

n

4mA to 20mA Transmitters

L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered

trademarks of Linear Technology Corporation. All other trademarks are the property of their

respective owners. Protected by U.S. Patents including 5825228.

TYPICAL APPLICATION

Battery Monitor

R

S

A

0.2Ω

2k

Q1

2N3904

CHARGER

VOLTAGE

+

R

A´

I

1/4 LT1491A

BATT

–

2k

1/4 LT1491A

LOGIC

–

+

R

B

Q2

2N3904

2k

LOGIC HIGH (5V) = CHARGING

LOGIC LOW (0V) = DISCHARGING

+

R

B´

1/4 LT1491A

2k

–

LOAD

+

R

G

1/4 LT1491A

V

OUT

10k

V

= 12V

BATT

–

S1

10k

90.9k

1490A TA01

V

=

OUT

S1 = OPEN, GAIN = 1

S1 = CLOSED, GAIN = 10

R

= R

A

S

B

I

=

AMPS

BATT

(R )(R /R )(GAIN) GAIN

V

= 5V, 0V

S

G

A

14901afd

1

LT1490A/LT1491A

ABSOLUTE MAXIMUM RATINGS ^{(Note 1)}

Total Supply Voltage (V+ to V–) ............................... 44V

Differential Input Voltage ......................................... 44V

Input Current (Note 9)......................................... 12mA

Output Short-Circuit Duration (Note 2) ........ Continuous

Operating Temperature Range (Note 3)

Specified Temperature Range (Note 4)

LT1490AC/LT1490AI............................–40°C to 85°C

LT1491AC/LT1491AI.............................–40°C to 85°C

LT1490AH/LT1491AH......................... –40°C to 125°C

Junction Temperature .......................................... 150°C

Junction Temperature (DD/DHC Package) ........... 125°C

Storage Temperature Range ................. –65°C to 150°C

Storage Temperature Range

LT1490AC/LT1491AC ...........................–40°C to 85°C

LT1490AI/LT1491AI .............................–40°C to 85°C

LT1490AH/LT1491AH......................... –40°C to 125°C

DD/DHC Package.............................. –65°C to 125°C

Lead Temperature (Soldering, 10 sec).................. 300°C

PIN CONFIGURATION

LT1490A

TOP VIEW

+

TOP VIEW

1

2

3

4

8

7

6

5

OUT A

–IN A

+IN A

V

OUT A

–IN A

+IN A

1

2

3

4

8

7

6

5

V

+

OUT A

–IN A

+IN A

1

2

3

4

8 V

OUT B

–IN B

+IN B

OUT B

–IN B

+IN B

7 OUT B

6 –IN B

5 +IN B

A

B

–

B

–

V

–

V

MS8 PACKAGE

8-LEAD PLASTIC MSOP

N8 PACKAGE

8-LEAD PDIP

S8 PACKAGE

DD PACKAGE

8-LEAD (3mm w 3mm) PLASTIC DFN

8-LEAD PLASTIC SO

T

= 150°C, θ = 250°C/W

JA

JMAX

T

= 150°C, θ = 130°C/W (N8)

= 150°C, θ = 190°C/W (S8)

JMAX

JA

T

= 125°C, θ = 160°C/W (NOTE 2)

JMAX

JA

T

JMAX

–

UNDERSIDE METAL CONNECTED TO V

LT1491A

TOP VIEW

A

OUT A

–IN A

+IN A

V+

1

2

3

4

5

6

7

8

16 OUT D

15 –IN D

OUT A

–IN A

+IN A

1

2

3

4

5

6

7

14

13

12

11

10

9

OUT D

D

C

–IN D

+IN D

A

B

D

C

14 +IN D

13 V–

+

–

V

+IN B

–IN B

OUT B

NC

12 +IN C

11 –IN C

10 OUT C

+IN B

–IN B

OUT B

+IN C

–IN C

OUT C

B

8

9

NC

N PACKAGE

14-LEAD PDIP

S PACKAGE

DHC16 PACKAGE

16-LEAD (5mm w 3mm) PLASTIC DFN

14-LEAD PLASTIC SO

T

= 150°C, θ = 110°C/W (N)

= 150°C, θ = 150°C/W (S)

JMAX

JA

T

= 125°C, θ = 160°C/W (NOTE 2)

JMAX

JA

–

UNDERSIDE METAL CONNECTED TO V

14901afd

2

LT1490A/LT1491A

ORDER INFORMATION

LEAD FREE FINISH

LT1490ACMS8#PBF

LT1490AIMS8#PBF

LT1490AHMS8#PBF

LT1490ACS8#PBF

LT1490AIS8#PBF

LT1490AHS8#PBF

LT1490ACN8#PBF

LT1490AIN8#PBF

LT1490ACDD#PBF

LT1490AIDD#PBF

LT1491ACS#PBF

LT1491AIS#PBF

TAPE AND REEL

PART MARKING*

LTNG

PACKAGE DESCRIPTION

8-Lead Plastic MSOP

8-Lead Plastic SO

SPECIFIED TEMPERATURE RANGE

0°C to 70°C

LT1490ACMS8#TRPBF

LT1490AIMS8#TRPBF

LT1490AHMS8#TRPBF

LT1490ACS8#TRPBF

LT1490AIS8#TRPBF

LT1490AHS8#TRPBF

LT1490ACN8#TRPBF

LT1490AIN8#TRPBF

LT1490ACDD#TRPBF

LT1490AIDD#TRPBF

LT1491ACS#TRPBF

LT1491AIS#TRPBF

LT1491AHS#TRPBF

LT1491ACN#TRPBF

LT1491AIN#TRPBF

LT1491ACDHC#TRPBF

LT1491AIDHC#TRPBF

LTPU

–40°C to 85°C

LTRK

–40°C to 125°C

0°C to 70°C

1490A

1490AI

8-Lead Plastic SO

–40°C to 85°C

1490AH

8-Lead Plastic SO

–40°C to 125°C

0°C to 70°C

LT1490ACN8

LT1490AIN8

LAAH

8-Lead PDIP

–40°C to 85°C

0°C to 70°C

8-Lead (3mm × 3mm) Plastic DFN

14-Lead Plastic SO

LAAH

–40°C to 85°C

0°C to 70°C

LT1491ACS

LT1491AIS

LT1491AHS

LT1491ACN

LT1491AIN

1491A

14-Lead Plastic SO

–40°C to 85°C

–40°C to 125°C

0°C to 70°C

LT1491AHS#PBF

LT1491ACN#PBF

LT1491AIN#PBF

14-Lead Plastic SO

14-Lead PDIP

–40°C to 85°C

0°C to 70°C

LT1491ACDHC#PBF

LT1491AIDHC#PBF

16-Lead (5mm × 3mm) Plastic DFN

1491A

–40°C to 85°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LTC Marketing for information on non-standard lead based finish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

14901afd

3

LT1490A/LT1491A

ELECTRICAL CHARACTERISTICS ^The● denotes specifications which apply over the full operating

temperature range of –40°C ≤ T_A≤ 85°C, otherwise specifications are at T_A= 25°C. V_S= 3V, 0V; V_S= 5V, 0V; V_CM= V_OUT= half supply

unless otherwise noted. (Note 4)

LT1490AC/LT1491AC

LT1490AI/LT1491AI

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

OS

Input Offset Voltage (Note 5)

LT1490A N, S Packages

110

500

700

800

μV

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

LT1490A MS8 Package, LT1491A N, S Packages

220

250

1000

1200

1400

μV

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

LT1490A DD, LT1491A DHC

1200

1400

1600

μV

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

l

Input Offset Voltage Drift (Note 9)

Input Offset Current

–40°C ≤ T ≤ 85°C

2

4

6

μV/°C

A

LT1490A DD, LT1491A DHC, –40°C ≤ T ≤ 85°C

A

l

I

0.2

0.8

nA

μA

OS

V

= 44V (Note 6)

CM

l

Input Bias Current

1

3

0.3

8

10

nA

μA

nA

B

V

CM

V = 0V

S

l

Input Bias Current Drift

Input Noise Voltage

–40°C ≤ T ≤ 85°C

2

1

pA/°C

A

0.1Hz to 10Hz

f = 1kHz

μV

P-P

e

n

Input Noise Voltage Density

Input Noise Current Density

Input Resistance

50

nV/√Hz

pA/√Hz

i

n

f = 1kHz

0.015

R

IN

Differential

6

4

17

11

Mꢀ

Common Mode, V = 0V to 44V

CM

C

IN

Input Capacitance

4.6

pF

V

l

Input Voltage Range

0

44

l

CMRR

Common Mode Rejection Ratio

(Note 6)

V

= 0V to V – 1V

84

80

98

dB

CM

CC

= 0V to 44V

A

Large-Signal Voltage Gain

V = 3V, V = 500mV to 2.5V, R = 10k

200

133

100

1500

V/mV

VOL

S

O

L

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

V = 5V, V = 500mV to 4.5V, R = 10k

400

250

200

1500

V/mV

S

O

L

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

l

V

Output Voltage Swing Low

V = 3V, No Load

3

10

mV

OL

S

V = 3V, I

= 5mA

250

450

S

SINK

l

V = 5V, No Load

3

250

330

10

500

mV

S

V = 5V, I

= 5mA

= 10mA

SINK

V = 5V, I

S

l

Output Voltage Swing High

V = 3V, No Load

2.95

2.55

2.978

2.6

V

OH

S

V = 3V, I

= 5mA

S

SOURCE

l

V = 5V, No Load

4.95

4.30

4.978

4.6

V

S

V = 5V, I

= 10mA

S

SOURCE

I

Short-Circuit Current (Note 2)

V = 3V, Short to GND

10

15

30

mA

SC

S

V = 3V, Short to V

S

CC

V = 5V, Short to GND

15

25

30

mA

S

V = 5V, Short to V

S

CC

14901afd

4

LT1490A/LT1491A

ELECTRICAL CHARACTERISTICS ^The● denotes specifications which apply over the full operating

temperature range of –40°C ≤ T_A≤ 85°C, otherwise specifications are at T_A= 25°C. V_S= 3V, 0V; V_S= 5V, 0V; V_CM= V_OUT= half supply

unless otherwise noted. (Note 4)

LT1490AC/LT1491AC

LT1490AI/LT1491AI

SYMBOL

PARAMETER

CONDITIONS

V = 2.5V to 12.5V, V = V = 1V

MIN

TYP

98

2

MAX

UNITS

l

PSRR

Power Supply Rejection Ratio

Minimum Operating Supply Voltage

Reverse Supply Voltage

84

dB

V

S

CM

O

2.5

I = –100μA per Amplifier

S

18

27

40

V

I

Supply Current per Amplifier

(Note 7)

50

55

μA

S

l

GBW

SR

Gain Bandwidth Product

(Note 6)

f = 1kHz

110

100

90

180

kHz

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

Slew Rate

(Note 8)

A = –1, R = ∞

0.035

0.031

0.030

0.06

V/μs

V

L

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

The ● denotes specifications which apply over the full operating temperature range of –40°C ≤ T_A≤ 85°C, otherwise specifications are

at T_A= 25°C. V_S= 15V, V_CM= 0V, V_OUT= 0V unless otherwise noted. (Note 4)

LT1490AC/LT1491AC

LT1490AI/LT1491AI

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

Input Offset Voltage (Note 5)

LT1490A N, S Packages

150

700

950

1100

μV

OS

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

LT1490A MS8 Package, LT1491A N, S Packages

250

285

1200

1350

1500

μV

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

LT1490A DD, LT1491A DHC

1400

1550

1700

μV

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

l

Input Offset Voltage Drift (Note 9)

–40°C ≤ T ≤ 85°C

2

6

7

μV/°C

A

LT1490A DD, LT1491A DHC, –40°C ≤ T ≤ 85°C

A

l

I

Input Offset Current

Input Bias Current

0.2

1

0.8

8

nA

OS

B

Input Bias Current Drift

Input Noise Voltage

–40°C ≤ T ≤ 85°C

5

pA/°C

A

0.1Hz to 10Hz

f = 1kHz

1

μV

P-P

e

Input Noise Voltage Density

Input Noise Current Density

Input Resistance

50

0.015

nV/√Hz

pA/√Hz

n

i

f = 1kHz

n

R

Differential

6

17

15000

Mꢀ

IN

Common Mode, V = –15V to 14V

CM

C

Input Capacitance

4.6

pF

V

IN

l

Input Voltage Range

–15

80

29

CMRR

Common Mode Rejection Ratio

Large-Signal Voltage Gain

V

= –15V to 29V

98

dB

CM

A

VOL

V = 14V, R = 10k

100

75

50

250

V/mV

O

L

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

l

V

O

Output Voltage Swing

No Load

14.9

14.5

14.978

14.750

14.670

V

I

=

5mA

OUT

10mA

14901afd

5

LT1490A/LT1491A

ELECTRICAL CHARACTERISTICS ^The● denotes specifications which apply over the full operating temperature

range of –40°C ≤ T_A≤ 85°C, otherwise specifications are at T_A= 25°C. V_S= 15V, V_CM= 0V, V_OUT= 0V unless otherwise noted. (Note 4)

LT1490AC/LT1491AC

LT1490AI/LT1491AI

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

I

Short-Circuit Current (Note 2)

Short to GND

20

15

10

25

mA

SC

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

l

PSRR

Power Supply Rejection Ratio

Supply Current per Amplifier

V = 1.25V to 22V

S

88

98

50

dB

I

70

85

μA

S

GBW

SR

Gain Bandwidth Product

Slew Rate

f = 1kHz

125

110

100

200

kHz

l

0°C ≤ T ≤ 70°C

A

–40°C ≤ T ≤ 85°C

A

A = –1, RL = ∞, V = 10V,

0.0375

0.07

V/μs

V

O

Measured at V = 5V

O

l

0°C ≤ T ≤ 70°C

0.0330

0.0300

V/μs

A

–40°C ≤ T ≤ 85°C

A

The ● denotes specifications which apply over the full operating temperature range of –40°C ≤ T_A≤ 125°C, V_S= 3V, 0V; V_S= 5V, 0V;

V_CM= V_OUT= half supply unless otherwise noted. (Note 4)

LT1490AH/LT1491AH

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

Input Offset Voltage (Note 5)

LT1490AHS8

110

500

2500

μV

OS

l

LT1490AHMS8, LT1491AHS

220

3

1000

3000

μV

l

Input Offset Voltage Drift (Note 9)

Input Offset Current

6

μV/°C

l

I

2

nA

μA

OS

V

= 44V (Note 6)

1.5

CM

l

Input Bias Current

20

15

nA

μA

B

l

Input Voltage Range

0.3

44

V

l

CMRR

Common Mode Rejection Ratio

(Note 6)

V

CM

V

CM

= 0.3V to V –1V

60

74

dB

CC

= 0.3V to 44V

A

V

Large-Signal Voltage Gain

Output Voltage Swing Low

Output Voltage Swing High

V = 3V, V = 500mV to 2.5V, R = 10k

200

25

1500

V/mV

VOL

S

O

L

l

V = 5V, V = 500mV to 4.5V, R = 10k

400

50

V/mV

S

O

L

l

V = 3V, No Load

15

mV

OL

S

V = 3V, I

= 2.5mA

450

SINK

l

V = 5V, No Load

15

500

mV

S

V = 5V, I

= 2.5mA

SINK

l

V = 3V, No Load

2.925

2.350

V

OH

S

V = 3V, I

= 5mA

S

SOURCE

l

V = 5V, No Load

4.925

4.100

V

S

V = 5V, I

= 10mA

S

SOURCE

l

PSRR

Power Supply Rejection Ratio

Minimum Operating Supply Voltage

Reverse Supply Voltage

V = 2.5V to 12.5V, V = V = 1V

80

dB

V

S

CM

O

2.5

I = –100μA per Amplifier

S

18

V

14901afd

6

LT1490A/LT1491A

ELECTRICAL CHARACTERISTICS ^The● denotes specifications which apply over the full operating temperature

range of –40°C ≤ T_A≤ 125°C. V_S= 15V, V_CM= 0V, V_OUT= 0V unless otherwise noted. (Note 4)

LT1490AH/LT1491AH

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

I

Supply Current per Amplifier (Note 7)

40

50

70

μA

S

l

GBW

SR

Gain Bandwidth Product (Note 6)

Slew Rate (Note 8)

f = 1kHz

110

60

180

0.06

150

250

3

kHz

A = –1, R = ∞

V

0.035

0.015

V/μs

L

V

Input Offset Voltage (Note 5)

LT1490AHS8

700

2700

μV

OS

LT1490AHMS8, LT1491AHS

1200

3200

μV

l

Input Offset Voltage Drift (Note 9)

Input Offset Current

7

2

μV/°C

nA

I

OS

Input Bias Current

20

29

nA

B

Input Voltage Range

–14.7

72

V

CMRR

Common Mode Rejection Ratio

Large-Signal Voltage Gain

V

= –14.7V to 29V

dB

CM

A

V = 14V, R = 10k

O

100

4

250

V/mV

VOL

L

l

V

O

Output Voltage Swing

No Load

OUT

14.8

14.3

V

I

= 2.5mA

l

PSRR

Power Supply Rejection Ratio

Supply Current per Amplifier

V = 1.25V to 22V

84

dB

S

I

50

70

95

μA

S

GBW

SR

Gain Bandwidth Product

Slew Rate

f = 1kHz

125

75

200

0.07

kHz

A = –1, R = ∞

0.0375

0.02

V/μs

V

L

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 5: ESD (electrostatic discharge) sensitive device. Extensive use

of ESD protection devices are used internal to the LT1490A/LT1491A.

However, high electrostatic discharge can damage or degrade the device.

Use proper ESD handling precautions.

Note 2: A heat sink may be required to keep the junction temperature

below absolute maximum. This depends on the power supply voltage and

Note 6: V = 5V limits are guaranteed by correlation to V = 3V and

S

V = 15V tests.

S

how many ampliﬁers are shorted. The θ speciﬁed for the DD and DHC

JA

Note 7: V = 3V limits are guaranteed by correlation to V = 5V and

S

package is with minimal PCB heat spreading metal. Using expanded metal

area on all layers of a board reduces this value.

V = 15V tests.

S

Note 8: Guaranteed by correlation to slew rate at V = 15V and GBꢀ

S

Note 3: The LT1490AC/LT1491AC and LT1490AI/LT1491AI are guaranteed

functional over the operating temperature range of –40°C to 85°C.

The LT1490AH/LT1491AH are guaranteed functional over the operating

temperature range of –40°C to 125°C.

at V = 3V and V = 15V tests.

S

Note 9: This parameter is not 100% tested.

Note 4: The LT1490AC/LT1491AC are guaranteed to meet speciﬁed

performance from 0°C to 70°C. The LT1490AC/LT1491AC are designed,

characterized and expected to meet speciﬁed performance from

–40°C to 85°C but are not tested or QA sampled at these temperatures.

The LT1490AI/LT1491AI are guaranteed to meet speciﬁed performance

from –40°C to 85°C. The LT1490AH/LT1491AH are guaranteed to meet

speciﬁed performance from –40°C to 125°C.

14901afd

7

LT1490A/LT1491A

TYPICAL PERFORMANCE CHARACTERISTICS

Input Bias Current

Supply Current vs Supply Voltage

Minimum Supply Voltage

vs Common Mode Voltage

80

70

60

50

40

30

20

10

0

5000

3000

1000

400

300

V

= 5V, 0V

S

T

= 125°C

A

T

200

100

= 25°C

A

T

= –55°C

T = –55°C

A

T

= 25°C

A

30

20

0

T

= 25°C

A

T

= –55°C

A

–100

T

= 125°C

A

10

–200

–300

0

T

= 125°C

1

A

–10

–400

0

5

10 15 20 25 30 35 40 45

TOTAL SUPPLY VOLTAGE (V)

–0.4

0 4.0 4.4 4.8 5.2 5.6

COMMON MODE VOLTAGE (V)

44

0

2

3

4

5

TOTAL SUPPLY VOLTAGE (V)

1490A G01

1490A G03

1490A G02

Output Saturation Voltage

vs Load Current (Output High)

Output Saturation Voltage

vs Load Current (Output Low)

Output Saturation Voltage

vs Input Overdrive

1

100m

10m

1m

100

90

80

70

60

50

40

30

20

10

0

V

= 5V, 0V

V

= 5V, 0V

V

= 5V, 0V

S

NO LOAD

T

= 125°C

A

T

= 125°C

A

T

= 25°C

A

100m

T

= 25°C

A

T

= –55°C

A

OUTPUT HIGH

OUTPUT LOW

T

= –55°C

1m

A

10m

1μ

10μ

100μ

10m

100m

0.1μ

1μ

10μ 100μ 1m

10m 100m

0

10

30

INPUT OVERDRIVE (mV)

40

50

20

SINKING LOAD CURRENT (A)

SOURCING LOAD CURRENT (A)

1490A G04

1490A G05

1490A G06

Noise Voltage Density

vs Frequency

0.1Hz to 10Hz Noise Voltage

Input Noise Current vs Frequency

120

100

80

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

V

= 2.5V

S

60

40

20

0

1

2

3

4

5

6

7

8

9

10

1

10

100

1k

1

10

100

1k

TIME (SEC)

FREQUENCY (Hz)

1490A G08

1490A G09

1490A G07

14901afd

8

LT1490A/LT1491A

TYPICAL PERFORMANCE CHARACTERISTICS

Gain and Phase Shift

vs Frequency

Gain Bandwidth Product

vs Temperature

Slew Rate vs Temperature

70

60

50

40

100

80

0.12

260

240

220

200

180

160

140

120

100

V

= 2.5V

f = 1kHz

S

RISING, V

=

15V

60

S

PHASE

0.10

0.08

0.06

0.04

40

30

20

0

V

= 15V

S

=

S

1.5V

GAIN

FALLING, V

=

15V

1.5V

V

= 1.5V

S

10

0

–20

–40

–60

–80

–100

FALLING, V

S

–10

–20

–30

1

10

100

1000

50

TEMPERATURE (°C)

125

50

TEMPERATURE (°C)

125

–50

0

25

75 100

–50

0

25

75 100

–25

FREQUENCY (kHz)

1490A G10

1490A G11

1490A G12

Gain Bandwidth Product and

Phase Margin vs Supply Voltage

CMRR vs Frequency

PSRR vs Frequency

250

240

230

220

210

200

190

180

170

160

150

60

120

80

70

V

= 2.5V

S

PHASE MARGIN

60

50

100

80

60

40

20

50

40

30

20

10

V

=

15V

POSITIVE SUPPLY

S

40

V

= 1.5V

S

30

GAIN BANDWIDTH

20

NEGATIVE SUPPLY

10

0

–10

–20

R

= 10k

L

f = 1kHz

1

10

FREQUENCY (kHz)

100

1

10

FREQUENCY (kHz)

100

0

5

10 15 20 25 30 35 40 45

TOTAL SUPPLY VOLTAGE (V)

1490A G15

1490A G14

1490A G13

Gain Bandwidth Product and

Phase Margin vs Load Resistance

Channel Separation vs Frequency

Output Impedance vs Frequency

130

350

300

250

200

150

100

50

80

10k

1k

V

= 15V

V

= 2.5V

V

A

=

2.5V

= –1

= R = 100k 70

S

V

F

120

110

100

90

R

G

f = 1kHz

A

= 100

= 10

V

PHASE MARGIN

60

50

40

30

20

100

10

80

GAIN BANDWIDTH

70

A

= 1

V

60

1

50

40

0.1

1

10

100

1

10

LOAD RESISTANCE (kΩ)

100

0.1

1

10

100

FREQUENCY (kHz)

1490A G17

1490A G16

1490A G18

14901afd

9

LT1490A/LT1491A

TYPICAL PERFORMANCE CHARACTERISTICS

Undistorted Output Swing

vs Frequency

Settling Time to 0.1%

vs Output Step

Capacitive Load Handling,

Overshoot vs Capacitive Load

10

8

100

90

80

70

60

50

40

30

20

10

0

35

30

25

20

15

10

5

V

=

15V

V = 5V, 0V

S

DISTORTION ≤ 1%

S

V

= 15V

S

I

= 170μA

SOURCE

A

= –1

V

6

A

= 1

V

4

2

0

A

= 10

V

–2

–4

–6

–8

–10

A

V

= 1

A

= 2

A

V

= 5

V

= 5V, 0V

A

= –1

S

V

A

= 1

V

0

140

160

10

100

1000

10000

0.1

1

10

100

20 40 60 80 100 120

SETTLING TIME (μs)

CAPACITIVE LOAD (pF)

FREQUENCY (kHz)

1490A G21

1490A G19

1490A F20

Total Harmonic Distortion + Noise

vs Frequency

Total Harmonic Distortion + Noise

vs Load Resistance

Total Harmonic Distortion + Noise

vs Output Voltage

10

1

10

1

10

1

V

= 3V, 0V

V

A

V

= 3V TOTAL

= 1

R = 10k

L

S

V

= 2V

V

= HALF SUPPLY

CM

OUT

P-P

= 1.2V

= 2V AT 1kHz

f = 1kHz

CM

IN

P-P

R

L

= 50k

V

=

IN

1.5V

1V

S

=

A

V

= 1

=

V

S

A

S

= –1

1.5V

V

=

1.5V

V

0.1

V

= 3V, 0V

IN

S

= 0.5V TO 2.5V

A

S

= –1

0.01

0.001

0.01

V

A

= –1

V

= 3V, 0V

A

= 1

V

= 3V, 0V

IN

S

A

= 1

V

= 3V, 0V

S

= 0.2V TO 2.2V

0.001

0

1

2

3

0.01

0.1

1

10

0.1

1

10

100

OUTPUT VOLTAGE (V

)

P-P

FREQUENCY (kHz)

LOAD RESISTANCE TO GROUND (kΩ)

1490A G24

1490A G22

1490A G23

Open-Loop Gain

Large-Signal Response

Small-Signal Response

V

S

=

15V

R

= 2k

L

R

= 10k

L

R

L

= 50k

1491A G27

1491A G26

1490A G25

V

A

=

= 1

15V

–10V

0V

10V

V

A

=

15V

S

V

S

V

= –1

OUTPUT VOLTAGE (5V/DIV)

14901afd

10

LT1490A/LT1491A

APPLICATIONS INFORMATION

Supply Voltage

The inputs are protected against excursions as much as

–

15V below V by an internal 1k resistor in series with

The positive supply pin of the LT1490A/LT1491A should

be bypassed with a small capacitor (about 0.01μF) within

an inch of the pin. When driving heavy loads an additional

4.7μF electrolytic capacitor should be used. When using

split supplies, the same is true for the negative supply pin.

each input and a diode from the input to the negative

supply. There is no output phase reversal for inputs up to

–

15V below V . There are no clamping diodes between the

inputs and the maximum differential input voltage is 44V.

TheLT1490A/LT1491Aareprotectedagainstreversebattery

voltages up to 18V. In the event a reverse battery condition

occurs, the supply current is less than 1nA.

Output

The output voltage swing of the LT1490A/LT1491A is

affected by input overdrive as shown in the typical per-

formance curves.

+

The LT1490A/LT1491A can be shut down by removing V .

Inthisconditiontheinputbiascurrentistypicallylessthan

0.5nA,eveniftheinputsare44Vabovethenegativesupply.

The output of the LT1490A/LT1491A can be pulled up to

+

18V beyond V with less than 1nA of leakage current,

+

WhenoperatingtheLT1490A/LT1491Aontotalsuppliesof

20V or more, the supply must not rise to its final voltage

in less than 1μs. This is especially true if low ESR bypass

capacitors are used. A series RLC circuit is formed from

the supply lead inductance and the bypass capacitor. A

resistance of 7.5Ω in the supply or in the bypass capacitor

will dampen the tuned circuit enough to limit the rise time.

provided that V is less than 0.5V.

The normally reverse-biased substrate diode from the

–

output to V will cause unlimited currents to flow when

–

the output is forced below V . If the current is transient

and limited to 100mA, no damage will occur.

TheLT1490A/LT1491Aareinternallycompensatedtodrive

at least 200pF of capacitance under any output loading

conditions.A0.22μFcapacitorinserieswitha150Ωresis-

tor between the output and ground will compensate these

amplifiers for larger capacitive loads, up to 10,000pF, at

all output currents.

Inputs

TheLT1490A/LT1491Ahavetwoinputstages,NPNandPNP

(see the Simplified Schematic), resulting in three distinct

operating regions as shown in the Input Bias Current vs

Common Mode typical performance curve.

Distortion

+

For input voltages about 0.8V or more below V , the PNP

Therearetwomaincontributorsofdistortioninopamps:

output crossover distortion as the output transitions

from sourcing to sinking current and distortion caused

by nonlinear common mode rejection. Of course, if the

op amp is operating inverting there is no common mode

induced distortion. When the LT1490A/LT1491A switch

between input stages there is significant nonlinearity in

the CMRR. Lower load resistance increases the output

crossover distortion, but has no effect on the input stage

transition distortion. For lowest distortion the LT1490A/

LT1491A should be operated single supply, with the out-

put always sourcing current and with the input voltage

input stage is active and the input bias current is typically

–1nA. When the input voltage is about 0.5V or less from

+

V , the NPN input stage is operating and the input bias

current is typically 25nA. Increases in temperature will

cause the voltage at which operation switches from the

+

PNP stage to the NPN stage to move towards V . The

input offset voltage of the NPN stage is untrimmed and

is typically 600μV.

A Schottky diode in the collector of each NPN transistor of

theNPNinputstageallowstheLT1490A/LT1491Atooperate

+

with either or both of their inputs above V . At about 0.3V

+

aboveV theNPNinputtransistorisfullysaturatedandthe

swing between ground and (V – 0.8V). See the Typical

input bias current is typically 3μA at room temperature.

The input offset voltage is typically 700μV when operating

Performance Characteristics curves.

+

above V . The LT1490A/LT1491A will operate with their

–

+

inputs 44V above V regardless of V .

14901afd

11

LT1490A/LT1491A

APPLICATIONS INFORMATION

Gain

in single supply applications where the load is returned

to ground. The typical performance photo of Open-Loop

Gain for various loads shows the details.

The open-loop gain is almost independent of load when

theoutputissourcingcurrent.Thisoptimizesperformance

TYPICAL APPLICATIONS

Square Wave Oscillator

Optional Output Compensation for

Capacitive Loads Greater Than 200pF

59k

5V

V

+

IN

100k

1/2 LT1490A

+

C

≤ 10,000pF

L

–

1/2 LT1490A

V

OUT

–

R

50k

0.22μF

150Ω

C

0.1μF

1490A TA02

1490A TA04

1

2RC

f =

V

OUT

= 5V WITH 5V SUPPLY

P-P

I

= 200μA

S

AT V = 5V, R = 50k, C = 1nF

S

OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAVE

SIMPLIFIED SCHEMATIC

+

V

Q2

Q1

Q3

Q22

D1

D2

D3

R1

30k

R2

1k

Q19

Q4

–IN

+IN

Q17

Q18

Q20

OUT

Q7

Q8

Q11 Q12

R3

1k

+

Q16

2μA

Q15

Q9

Q10

Q13

Q14

Q21

R4

40k

R5

40k

Q5

Q6

D4

D5

–

V

ONE AMPLIFIER

1490A SS

14901afd

12

LT1490A/LT1491A

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

DD Package

8-Lead Plastic DFN (3mm w 3mm)

(Reference LTC DWG # 05-08-1698 Rev C)

R = 0.125

0.40 t 0.10

TYP

5

8

0.70 t0.05

3.5 t0.05

2.10 t0.05 (2 SIDES)

1.65 t0.05

3.00 t0.10

(4 SIDES)

1.65 t 0.10

(2 SIDES)

PIN 1

TOP MARK

(NOTE 6)

PACKAGE

OUTLINE

(DD8) DFN 0509 REV C

4

1

0.25 t 0.05

0.75 t0.05

0.200 REF

0.25 t 0.05

0.50 BSC

0.50

BSC

2.38 t0.10

2.38 t0.05

BOTTOM VIEW—EXPOSED PAD

0.00 – 0.05

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED

NOTE:

1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)

2. DRAWING NOT TO SCALE

3. ALL DIMENSIONS ARE IN MILLIMETERS

4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE

MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE

5. EXPOSED PAD SHALL BE SOLDER PLATED

6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION

ON TOP AND BOTTOM OF PACKAGE

MS8 Package

8-Lead Plastic MSOP

(Reference LTC DWG # 05-08-1660 Rev F)

3.00 t 0.102

(.118 t .004)

(NOTE 3)

0.52

(.0205)

REF

8

7 6 5

0.889 t 0.127

3.00 t 0.102

(.118 t .004)

(NOTE 4)

(.035 t .005)

DETAIL “A”

0.254

4.90 t 0.152

(.193 t .006)

(.010)

0s – 6s TYP

5.23

(.206)

MIN

GAUGE PLANE

3.20 – 3.45

(.126 – .136)

1

2

3

4

0.53 t 0.152

(.021 t .006)

1.10

(.043)

MAX

0.86

(.034)

REF

DETAIL “A”

0.65

(.0256)

BSC

0.42 t 0.038

0.18

(.007)

(.0165 t .0015)

TYP

SEATING

PLANE

RECOMMENDED SOLDER PAD LAYOUT

NOTE:

1. DIMENSIONS IN MILLIMETER/(INCH)

2. DRAWING NOT TO SCALE

0.22 – 0.38

0.1016 t 0.0508

(.009 – .015)

(.004 t .002)

0.65

(.0256)

BSC

TYP

MSOP (MS8) 0307 REV F

3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.

MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX

14901afd

13

LT1490A/LT1491A

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

N Package

8-Lead PDIP (Narrow .300 Inch)

(Reference LTC DWG # 05-08-1510 Rev I)

.400*

(10.160)

MAX

.130 t .005

.300 – .325

.045 – .065

(3.302 t 0.127)

(1.143 – 1.651)

(7.620 – 8.255)

8

1

7

6

5

.065

(1.651)

TYP

.255 t .015*

(6.477 t 0.381)

.008 – .015

(0.203 – 0.381)

.120

.020

(0.508)

MIN

(3.048)

MIN

+.035

–.015

2

4

3

.325

.018 t .003

(0.457 t 0.076)

.100

(2.54)

BSC

N8 REV I 0711

+0.889

8.255

ꢀ

ꢁ

–0.381

NOTE:

INCHES

1. DIMENSIONS ARE

MILLIMETERS

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)

S8 Package

8-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610)

.189 – .197

(4.801 – 5.004)

.045 p.005

NOTE 3

.050 BSC

7

5

8

6

.245

MIN

.160 p.005

.150 – .157

(3.810 – 3.988)

NOTE 3

.228 – .244

(5.791 – 6.197)

.030 p.005

TYP

1

3

4

2

RECOMMENDED SOLDER PAD LAYOUT

.010 – .020

(0.254 – 0.508)

s 45o

.053 – .069

(1.346 – 1.752)

.004 – .010

(0.101 – 0.254)

.008 – .010

(0.203 – 0.254)

0o– 8o TYP

.016 – .050

(0.406 – 1.270)

.050

(1.270)

BSC

.014 – .019

(0.355 – 0.483)

TYP

NOTE:

INCHES

1. DIMENSIONS IN

(MILLIMETERS)

2. DRAWING NOT TO SCALE

3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)

SO8 0303

14901afd

14

LT1490A/LT1491A

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

N Package

14-Lead PDIP (Narrow .300 Inch)

(Reference LTC DWG # 05-08-1510 Rev I)

.770ꢀ

(19.558)

MAX

14

13

12

11

10

9

8

7

.255 .015ꢀ

(6.477 0.381)

1

2

3

5

6

4

.300 – .325

(7.620 – 8.255)

.045 – .065

(1.143 – 1.651)

.130 .005

(3.302 0.127)

.020

(0.508)

MIN

.065

(1.651)

TYP

.008 – .015

(0.203 – 0.381)

+.035

.325

.005

(0.127)

MIN

–.015

.120

(3.048)

MIN

.018 .003

.100

(2.54)

BSC

+0.889

8.255

(0.457 0.076)

ꢀ

ꢁ

–0.381

N14 REV I 0711

NOTE:

INCHES

MILLIMETERS

1. DIMENSIONS ARE

ꢀTHESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)

S Package

14-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610)

.337 – .344

.045 .005

(8.560 – 8.738)

.050 BSC

NOTE 3

13

12

11

10

9

8

14

N

1

.245

MIN

.160 .005

.150 – .157

.228 – .244

(5.791 – 6.197)

(3.810 – 3.988)

NOTE 3

2

3

N/2

7

.030 .005

TYP

RECOMMENDED SOLDER PAD LAYOUT

1

2

3

4

5

6

.010 – .020

(0.254 – 0.508)

w 45

.053 – .069

(1.346 – 1.752)

.004 – .010

(0.101 – 0.254)

.008 – .010

(0.203 – 0.254)

0° – 8° TYP

.050

(1.270)

BSC

.014 – .019

(0.355 – 0.483)

TYP

.016 – .050

(0.406 – 1.270)

S14 0502

NOTE:

INCHES

(MILLIMETERS)

2. DRAWING NOT TO SCALE

1. DIMENSIONS IN

3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)

14901afd

15

LT1490A/LT1491A

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

DHC Package

16-Lead Plastic DFN (5mm × 3mm)

(Reference LTC DWG # 05-08-1706)

0.65 p0.05

3.50 p0.05

1.65 p0.05

2.20 p0.05 (2 SIDES)

PACKAGE

OUTLINE

0.25 p 0.05

0.50 BSC

4.40 p0.05

(2 SIDES)

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

R = 0.115

TYP

0.40 p 0.10

5.00 p0.10

(2 SIDES)

9

16

R = 0.20

TYP

3.00 p0.10 1.65 p 0.10

(2 SIDES)

PIN 1

TOP MARK

(SEE NOTE 6)

PIN 1

NOTCH

(DHC16) DFN 1103

8

1

0.25 p 0.05

0.75 p0.05

0.200 REF

0.50 BSC

4.40 p0.10

(2 SIDES)

0.00 – 0.05

BOTTOM VIEW—EXPOSED PAD

NOTE:

1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC

PACKAGE OUTLINE MO-229

2. DRAWING NOT TO SCALE

3. ALL DIMENSIONS ARE IN MILLIMETERS

4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE

MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE

5. EXPOSED PAD SHALL BE SOLDER PLATED

6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE

TOP AND BOTTOM OF PACKAGE

14901afd

16

LT1490A/LT1491A

REVISION HISTORY ^{(Revision history begins at Rev C)}

REV

DATE

DESCRIPTION

PAGE NUMBER

C

10/10 Changed units from mV to V for V in Electrical Characteristics

7

13-16

3

O

Updated package drawings

D

12/11 Revised Order Information

14901afd

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

17

LT1490A/LT1491A

TYPICAL APPLICATION

Ring-Tone Generator

60V

R16

100k

R2

47k

Q1

R3

R5

IRF628

R6

Q3

2N3904

10k

100k

10k

C3

C2

0.047μF

0.47μF

R17

620Ω

Z1

15V

100k

5

R9

300k

R11

+

10k

10

9

3

2

7

D1

1N4148

1/4 LT1491A

+

1

6

8

R1

33k

1/4 LT1491A

–

4

13

12

R7

16k

–

C4

0.068μF

–

14

R18

100Ω

1/4 LT1491A

+

C7

47μF

R26

2k

R24

420

R23

4.7k

R12

10k

R14

10k

R4

1.6M

R8

620k

C1

1μF

11

R10

620k

SMOOTHING FILTER

OPTO1*

R25

4.7k

R13

130k

R15

47k

C5

0.01μF

CADENCE OSCILLATOR

20Hz OSCILLATOR

Q5

2N3904

UP TO

LOAD TEN

PHONES

Z2

15V

R19

620Ω

Q4

2N3906

Q2

IRF9620

R21

150Ω

C6

0.033μF

1490A TA03

*LED OF OPTO1 ILLUMINATES WHEN THE PHONE IS OFF THE HOOK

SEE DESIGN NOTE DN134 FOR A DISCUSSION OF THE CIRCUIT

POWER AMPLIFIER

R20

100k

–180V

RELATED PARTS

PART NUMBER

LT1366/LT1367

LT1636

DESCRIPTION

COMMENTS

Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps

475μV V

, 500V/mV A

, 400kHz GBW

OS(MAX)

VOL(MIN)

Single Over-The-Top Micropower Rail-to-Rail Input and Output 55μA Supply Current, V Extends 44V Above V

Op Amp

,

EE

CM

Independent of V , MSOP Package, Shutdown Function

CC

LT1638/LT1639

LT1782

Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail

Input and Output Op Amps

0.4V/μs Slew Rate, 230μA Supply Current per Amplifier

Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and

Output Op Amp

SOT-23, 800μV V , I = 55μA (Max),

OS(MAX) S

Gain-Bandwidth = 200kHz, Shutdown Pin

LT1783

1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and

Output Op Amp

SOT-23, 800μV V , I = 300μA (Max),

OS(MAX)

S

Gain-Bandwidth = 1.2MHz, Shutdown Pin

14901afd

LT 1211 REV D • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

18

●

(408) 432-1900 FAX: (408) 434-0507 www.linear.com


型号：	LT1490AHMS8#PBF
厂家：	Linear
描述：	Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
文件：	总18页 (文件大小：228K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT1490AHMS8#PBF [Linear]

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