LT1124IS8-1#TRPBF_技术文档

LT1124/LT1125

Dual/Quad Low Noise,

High Speed Precision Op Amps

FeaTures

DescripTion

The LT^®1124 dual and LT1125 quad are high performance

op amps that offer higher gain, slew rate and bandwidth

than the industry standard OP-27 and competing OP-270/

OP-470 op amps. In addition, the LT1124/LT1125 have

lower I and I than the OP-27; lower V and noise

n

100% Tested Low Voltage Noise:

2.7nV/√Hz Typ

4.2nV/√Hz Max

n

Slew Rate: 4.5V/µs Typ

n

Gain-Bandwidth Product: 12.5MHz Typ

Offset Voltage,

B

OS

n

than the OP-270/OP-470.

Prime Grade: 70µV Max

Low Grade: 100µV Max

In the design, processing and testing of the device, par-

ticular attention has been paid to the optimization of the

entire distribution of several key parameters. Slew rate,

gain bandwidth and 1kHz noise are 100% tested for each

individual amplifier. Consequently, the specifications

of even the lowest cost grades (the LT1124C and the

LT1125C) have been spectacularly improved compared

to equivalent grades of competing amplifiers.

n

High Voltage Gain: 5 Million Min

n

Supply Current Per Amplifier: 2.75mA Max

n

Common Mode Rejection: 112dB Min

n

Power Supply Rejection: 116dB Min

n

Available in 8-Pin SO Package

applicaTions

Power consumption of the LT1124 is one-half of two

OP-27s. Low power and high performance in an 8-pin

SO package make the LT1124 a first choice for surface

mounted systems and where board space is restricted.

n

Two and Three Op Amp Instrumentation Amplifiers

n

Low Noise Signal Processing

n

Active Filters

n

Microvolt Accuracy Threshold Detection

For a decompensated version of these devices, with three

times higher slew rate and bandwidth, please see the

LT1126/LT1127 data sheet.

L, LT, LTC, LTM, 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 4775884, 4837496.

n

Strain Gauge Amplifiers

n

Direct Coupled Audio Gain Stages

n

Tape Head Preamplifiers

n

Infrared Detectors

Typical applicaTion

Instrumentation Amplifier with Shield Driver

Input Offset Voltage Distribution

3

+

1k

30k

(All Packages, LT1124 and LT1125)

1

1/4

LT1125

–

2

R

F

758 DUALS

200 QUADS

2316 UNITS

TESTED

V

=

15V

S

A

15V

4

3.4k

T

= 25°C

30

20

10

0

5

6

GUARD

+

–

R

G

7

1/4

LT1125

100Ω

OUTPUT

30k

10

+

–

11

8

1/4

LT1125

R

G

INPUT

100Ω

9

–15V

–

GUARD

GAIN = 30 (1 + R /R ) ≈ 1000

F

G

POWER BW = 170kHz

SMALL-SIGNAL BW = 400kHz

R

F

13

12

NOISE = 3.8µV/√Hz AT OUTPUT

= 35µV

–

+

3.4k

V

OS

–100

–60

–20

20

60

100

14

1/4

LT1125

INPUT OFFSET VOLTAGE (µV)

1k

1124/25 TA02

1124/25 TA01

11245ff

1

For more information www.linear.com/LT1124

LT1124/LT1125

absoluTe MaxiMuM raTings

(Note 1)

Supply Voltage........................................................ 22V

Input Voltages............................Equal to Supply Voltage

Output Short-Circuit Duration.......................... Indefinite

Differential Input Current (Note 6) ....................... 25mA

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

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

Operating Temperature Range

LT1124AC/LT1124C

LT1125AC/LT1125C (Note 10) ..............–40°C to 85°C

LT1124AI/LT1124I ................................–40°C to 85°C

LT1124AMP/LT1125MP...................... –55°C to 125°C

LT1124AM/LT1124M

LT1125AM/LT1125M

OBSOLETE......................................... –55°C to 125°C

pin conFiguraTion

TOP VIEW

+

TOP VIEW

+

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

V

8

7

6

5

OUT B

–IN B

+IN B

+IN A

1

2

3

4

8

7

6

5

–IN A

OUT B

–IN B

+IN B

A

–

V

A

B

OUT A

B

–

+

V

+IN B

–IN B

V

OUT B

S8 PACKAGE

8-LEAD PLASTIC SO

N8 PACKAGE

8-LEAD PDIP

S8 PACKAGE

8-LEAD PLASTIC SO

T

= 150°C, θ = 190°C/W

JA

T

= 140°C, θ = 130°C/W

JMAX

JA

T

= 140°C, θ = 190°C/W

JA

JMAX

NOTE: THIS PIN CONFIGURATION DIFFERS FROM THE 8-PIN

PDIP CONFIGURATION. INSTEAD, IT FOLLOWS THE ROTATED

LT1013DS8 SO PACKAGE PIN LOCATIONS

J8 PACKAGE

8-LEAD CERAMIC DIP

T

= 160°C, θ = 100°C/W

JMAX

JA

OBSOLETE PINOUT

OBSOLETE PACKAGE

Consider the N8 for Alternate Source

TOP VIEW

OUT A

–IN A

+IN A

1

2

3

4

5

6

7

14

13

12

11

10

9

OUT D

–IN D

+IN D

TOP VIEW

A

B

D

C

OUT A

–IN A

+IN A

1

2

3

4

5

6

7

8

16 OUT D

15 –IN D

+

–

V

A

B

D

C

14

13

12

11

10

9

+IN D

+IN B

–IN B

+IN C

–IN C

OUT C

+

–

V

+IN B

–IN B

OUT B

NC

+IN C

–IN C

OUT C

NC

OUT B

8

N PACKAGE

14-LEAD PDIP

T

JMAX

= 140°C, θ = 110°C/W (N)

JA

SW PACKAGE

16-LEAD PLASTIC SO WIDE

J PACKAGE

14-LEAD CERAMIC DIP

T

= 160°C, θ = 80°C/W

T

= 140°C, θ = 130°C/W

JA

JMAX

JA

JMAX

OBSOLETE PACKAGE

Consider the N for Alternate Source

11245ff

2

For more information www.linear.com/LT1124

LT1124/LT1125

orDer inForMaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

1124

PACKAGE DESCRIPTION

SPECIFIED TEMPERATURE RANGE

LT1124CS8#PBF

LT1124CS8#TRPBF

LT1124AIS8#TRPBF

LT1124IS8#TRPBF

LT1124AMPS8#TRPBF

LT1124CS8-1#TRPBF

LT1124AIS8-1#TRPBF

LT1124IS8-1#TRPBF

8-Lead Plastic SO, Rotated Pinout 0°C to 70°C

8-Lead Plastic SO, Rotated Pinout –40°C to 85°C

8-Lead Plastic SO, Rotated Pinout –55°C to 125°C

8-Lead Plastic SO, Standard Pinout 0°C to 70°C

8-Lead Plastic SO, Standard Pinout –40°C to 85°C

8-Lead Plastic SO, Standard Pinout –55°C to 125°C

LT1124AIS8#PBF

LT1124IS8#PBF

1124AI

1124I

LT1124AMPS8#PBF

LT1124CS8-1#PBF

LT1124AIS8-1#PBF

LT1124IS8-1#PBF

LT1124AMPS8-1#PBF

124AMP

11241

LT1124AMPS8-1#TRPBF 11241

OBSOLETE PINOUT

LT1125CSW 16-Lead Plastic SO Wide

LT1125CSW#PBF

LT1125MPSW

LT1124ACN8#PBF

LT1124CN8#PBF

LT1125ACN#PBF

LT1125CN#PBF

LEAD BASED FINISH

LT1124CS8

LT1125CSW#TRPBF

LT1125MPSW#TR

LT1124ACN8#TRPBF

LT1124CN8#TRPBF

LT1125ACN#TRPBF

LT1125CN#TRPBF

TAPE AND REEL

LT1124CS8#TR

LT1124AIS8#TR

LT1124IS8#TR

0°C to 70°C

LT1125MPSW

LT1124ACN8

LT1124CN8

LT1125ACN

LT1125CN

PART MARKING*

1124

16-Lead Plastic SO Wide

8-Lead PDIP

–55°C to 125°C

0°C to 70°C

8-Lead PDIP

0°C to 70°C

14-Lead PDIP

0°C to 70°C

14-Lead PDIP

0°C to 70°C

PACKAGE DESCRIPTION

SPECIFIED TEMPERATURE RANGE

8-Lead Plastic SO, Rotated Pinout 0°C to 70°C

8-Lead Plastic SO, Rotated Pinout –40°C to 85°C

LT1124AIS8

1124AI

LT1124IS8

1124I

LT1125CSW

LT1124ACN8

LT1124CN8

LT1125CSW#TR

LT1124ACN8#TR

LT1124CN8#TR

LT1125ACN#TR

LT1125CN#TR

LT1125CSW

LT1124ACN8

LT1124CN8

LT1125ACN

LT1125CN

LT1124CJ8

LT1124AMJ8

LT1124MJ8

LT1125CJ

16-Lead Plastic SO Wide

8-Lead PDIP

0°C to 70°C

8-Lead PDIP

0°C to 70°C

LT1125ACN

14-Lead PDIP

0°C to 70°C

LT1125CN

14-Lead PDIP

0°C to 70°C

LT1124CJ8

LT1124CJ8#TR

LT1124AMJ8#TR

LT1124MJ8#TR

LT1125CJ#TR

8-Lead CERAMIC DIP

14-Lead CERAMIC DIP

0°C to 70°C

LT1124AMJ8

LT1124MJ8

–55°C to 125°C

0°C to 70°C

LT1125CJ

LT1125AMJ

LT1125AMJ#TR

LT1125MJ#TR

LT1125AMJ

LT1125MJ

–55°C to 125°C

LT1125MJ

OBSOLETE PACKAGE

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

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/

11245ff

3

For more information www.linear.com/LT1124

LT1124/LT1125

T_A= 25°C, V_S= 15V, unless otherwise noted.

elecTrical characTerisTics

LT1124AC/AI/AM

LT1125AC/AM

LT1124C/I/M

LT1125C/M

SYMBOL PARAMETER

CONDITIONS (Note 2)

MIN

TYP

MAX

MIN

TYP

MAX UNITS

V

OS

Input Offset Voltage

LT1124

LT1125

20

25

70

90

25

30

100

140

µV

∆V

Long-Term Input Offset

Voltage Stability

0.3

µV/Mo

OS

∆Time

I

OS

Input Offset Current

LT1124

LT1125

5

6

15

20

6

7

20

30

nA

I

Input Bias Current

7

20

8

30

nA

B

e

Input Noise Voltage

0.1Hz to 10Hz (Notes 8, 9)

70

200

70

nV

P-P

n

Input Noise Voltage Density

f = 10Hz (Note 5)

O

3.0

2.7

5.5

4.2

3.0

2.7

5.5 nV/√Hz

4.2 nV/√Hz

O

f = 1000Hz (Note 3)

i

Input Noise Current Density

f = 10Hz

O

1.3

0.3

1.3

0.3

pA/√Hz

n

O

f = 1000Hz

V

Input Voltage Range

12

112

116

12.8

126

12

106

110

12.8

124

V

dB

CM

CMRR

PSRR

Common Mode Rejection Ratio

Power Supply Rejection Ratio

Large-Signal Voltage Gain

V

=

12V

CM

V = 4V to 18V

S

A

R ≥ 10k, V =

OUT

R ≥ 2k, V

10V

5

2

17

4

3.0

1.5

15

3

V/µV

VOL

L

=

OUT

V

Maximum Output Voltage Swing

Slew Rate

R ≥ 2k

13

3

13.8

4.5

12.5

2.7

8

13.8

4.5

V

V/µs

MHz

Ω

OUT

L

SR

R ≥ 2k (Notes 3, 7)

L

GBW

Gain-Bandwidth Product

Open-Loop Output Resistance

Supply Current per Amplifier

Channel Separation

f = 100kHz (Note 3)

O

9

12.5

75

12.5

75

Z

V

OUT

= 0, I

= 0

OUT

O

I

2.3

2.75

2.3

2.75

mA

dB

S

f ≤ 10Hz (Note 9)

10V, R = 2k

134

150

130

150

V

OUT

=

L

The l denotes the specifications which apply over the –55°C ≤ T_A≤ 125°C temperature range, V_S= 15V, unless otherwise noted.

LT1124AM

LT1125AM

TYP

LT1124M

LT1125M

TYP

SYMBOL PARAMETER

CONDITIONS (Note 2)

MIN

MAX

MIN

MAX UNITS

l

V

Input Offset Voltage

LT1124

LT1125

50

55

170

190

60

70

250

290

µV

OS

l

∆V

Average Input Offset

Voltage Drift

(Note 5)

0.3

1.0

0.4

1.5

µV/°C

OS

∆Temp

l

I

Input Offset Current

LT1124

LT1125

18

45

55

20

60

70

nA

OS

l

I

Input Bias Current

18

12

55

20

12

70

nA

V

B

V

Input Voltage Range

11.3

106

110

11.3

100

104

CM

CMRR

PSRR

Common Mode Rejection Ratio

Power Supply Rejection Ratio

Large-Signal Voltage Gain

V

=

11.3V

122

120

dB

CM

V = 4V to 18V

S

l

A

R ≥ 10k, V =

OUT

R ≥ 2k, V

10V

3

1

10

3

2.0

0.7

10

2

V/µV

VOL

L

=

OUT

l

V

Maximum Output Voltage Swing

Slew Rate

R ≥ 2k

12.5

2.3

13.6

3.8

12

2

13.6

3.8

V

V/µs

mA

OUT

L

SR

R ≥ 2k (Notes 3, 7)

L

I

Supply Current per Amplifier

2.5

3.25

2.5

3.25

S

11245ff

4

For more information www.linear.com/LT1124

LT1124/LT1125

The l denotes the specifications which apply over the 0°C ≤ T_A≤ 70°C

elecTrical characTerisTics

temperature range, V_S= 15V, unless otherwise noted.

LT1124AC

LT1125AC

TYP

LT1124C

LT1125C

TYP MAX UNITS

SYMBOL PARAMETER

CONDITIONS (Note 2)

MIN

MAX

MIN

l

V

OS

Input Offset Voltage

LT1124

LT1125

35

40

120

140

45

50

170

210

µV

l

∆V

Average Input Offset

Voltage Drift

(Note 5)

0.3

1

0.4

1.5

µV/°C

OS

∆Temp

l

I

Input Offset Current

LT1124

LT1125

6

7

25

35

7

8

35

45

nA

OS

l

I

Input Bias Current

8

35

9

45

nA

V

B

V

Input Voltage Range

11.5

109

112

12.4

125

11.5

102

107

12.4

122

CM

CMRR

PSRR

Common Mode Rejection Ratio

Power Supply Rejection Ratio

Large-Signal Voltage Gain

V

=

11.5V

dB

CM

V = 4V to 18V

S

l

A

R ≥ 10k, V =

OUT

R ≥ 2k, V

10V

4.0

1.5

15

3.5

2.5

1.0

14

2.5

V/µV

VOL

L

=

OUT

l

V

Maximum Output Voltage Swing

Slew Rate

R ≥ 2k

12.5

2.6

13.7

4

12

13.7

4

V

V/µs

mA

OUT

L

SR

R ≥ 2k (Notes 3, 7)

L

2.4

I

Supply Current per Amplifier

2.4

3

2.4

3

S

The ^ldenotes the specifications which apply over the –40°C ≤ T_A≤ 85°C temperature range, V_S= 15V, unless otherwise noted. (Note 10)

LT1124AC/AI

LT1125AC

LT1124C/I

LT1125C

TYP MAX UNITS

SYMBOL PARAMETER

CONDITIONS (Note 2)

MIN

TYP

MAX

MIN

l

V

OS

Input Offset Voltage

LT1124

LT1125

40

45

140

160

50

55

200

240

µV

l

∆V

Average Input Offset

Voltage Drift

(Note 5)

0.3

1

0.4

1.5

µV/°C

OS

∆Temp

l

I

Input Offset Current

LT1124

LT1125

15

40

50

17

55

65

nA

OS

l

I

Input Bias Current

15

12.2

124

50

17

12.2

121

65

nA

V

B

V

Input Voltage Range

11.4

107

111

11.4

101

106

CM

CMRR

PSRR

Common Mode Rejection Ratio

Power Supply Rejection Ratio

Large-Signal Voltage Gain

V

=

11.4V

dB

CM

V = 4V to 18V

S

l

A

R ≥ 10k, V =

OUT

R ≥ 2k, V

10V

3.5

1.2

12

3.2

2.2

0.8

12

2.3

V/µV

VOL

L

=

OUT

l

V

Maximum Output Voltage Swing

Slew Rate

R ≥ 2k

12.5

2.4

13.6

3.9

12

13.6

3.9

V

V/µs

mA

OUT

L

SR

R ≥ 2k (Notes 3, 7)

L

2.1

I

Supply Current per Amplifier

2.4

3.25

2.4

3.25

S

11245ff

5

For more information www.linear.com/LT1124

LT1124/LT1125

elecTrical characTerisTics

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.

voltage exceeds 1.4V, the input current should be limited to 25mA.

Note 7: Slew rate is measured in A = –1; input signal is 7.5V, output

V

measured at 2.5V.

Note 8: 0.1Hz to 10Hz noise can be inferred from the 10Hz noise voltage

density test. See the test circuit and frequency response curve for 0.1Hz

to 10Hz tester in the Applications Information section of the LT1007 or

LT1028 data sheets.

Note 2: Typical parameters are defined as the 60% yield of parameter

distributions of individual amplifiers; i.e., out of 100 LT1125s (or 100

LT1124s) typically 240 op amps (or 120) will be better than the indicated

specification.

Note 3: This parameter is 100% tested for each individual amplifier.

Note 4: This parameter is sample tested only.

Note 5: This parameter is not 100% tested.

Note 6: The inputs are protected by back-to-back diodes. Current limiting

resistors are not used in order to achieve low noise. If differential input

Note 9: This parameter is guaranteed but not tested.

Note 10: The LT1124C/LT1125C and LT1124AC/LT1125AC are guaranteed

to meet specified performance from 0°C to 70°C and are designed,

characterized and expected to meet these extended temperature limits,

but are not tested at –40°C and 85°C. The LT1124AI and LT1124I are

guaranteed to meet the extended temperature limits.

Typical perForMance characTerisTics

0.1Hz to 10Hz Voltage Noise

0.01Hz to 1Hz Voltage Noise

Voltage Noise vs Frequency

100

30

V

=

15V

S

A

T

= 25°C

10

3

MAXIMUM

TYPICAL

1/f CORNER

2.3Hz

1

0.1

0

2

4

6

8

10

0

20

40

60

80

100

1.0

10

FREQUENCY (Hz)

100

1000

TIME (SECONDS)

1124/25 G03

1124/25 G01

1124/25 G02

Input Bias or Offset Current

vs Temperature

Current Noise vs Frequency

10.0

3.0

30

V

S

=

1ꢀV

V

= 15V

S

T

= 2ꢀ°C

A

20

10

0

1.0

0.3

MAXIMUM

TYPICAL

LT1124M/LT1125M

1/f CORNER

100Hz

LT1124AM/LT1125AM

0.1

10

100

1k

10k

–75 –50 –25

0

25 50 75 100 125

FREQUENCY (Hz)

TEMPERATURE (°C)

1124 G04

1124/25 G05

11245ff

6

For more information www.linear.com/LT1124

LT1124/LT1125

Typical perForMance characTerisTics

Input Bias Current Over the

Output Short-Circuit Current

Common Mode Rejection Ratio

vs Frequency

Common Mode Range

vs Time

20

160

140

120

100

80

50

V

T

=

15V

T

= 25°C

15V

10V

S

A

V

= 15V

A

S

40

30

20

10

= 25°C

V

=

S

CM

15

10

5

25°C

–55°C

=

DEVICE WITH POSITIVE

INPUT CURRENT

125°C

0

–10

–20

–30

–5

60

125°C

25°C

DEVICE WITH NEGATIVE

INPUT CURRENT

–10

–15

–20

40

20

–55°C

–40

–50

0

–15 –10

–5

0

5

10

15

1k

10k

100k

1M

10M

0

1

2

3

4

COMMON MODE INPUT VOLTAGE (V)

FREQUENCY (Hz)

TIME FROM OUTPUT SHORT TO GND (MINUTES)

1124/25 G08

1124/25 G07

LT1124 G06

Power Supply Rejection Ratio

vs Frequency

Voltage Gain vs Frequency

Voltage Gain vs Temperature

160

20

18

16

14

12

10

8

180

T

= 25°C

V

=

15V

A

S

A

LT1124AM/LT1125AM

T

= 25°C

140

120

100

80

140

R = 10k

L

LT1124M/LT1125M

100

60

V

OUT

=

15V

= 10V

S

V

–PSRR

+PSRR

60

6

R = 2k

L

LT1124AM/LT1125AM

40

20

0

20

4

2

LT1124M/LT1125M

0

–20

2

3

4

5

6

7

8

–75 –50 –25

0

25 50 75 100 125

1

100

10k

1M

100M

0.01

1

10 10 10 10 10 10 10 10

FREQUENCY (Hz)

TEMPERATURE (°C)

1124/25 G09

1124/25 G11

1124/25 G10

Input Offset Voltage Drift

Distribution

Gain, Phase Shift vs Frequency

50

40

80

40

V

=

15V

V = 15V

S

A

L

200 N8

100 S8

96 J8

T

= 25°C

= 10pF

100

120

C

Ø

396 UNITS TESTED

30

20

30

20

10

0

140

160

GAIN

10

0

180

200

–10

0.1

1

10

100

–0.8

–0.4

0

0.4

0.8

FREQUENCY (MHz)

INPUT OFFSET VOLTAGE DRIFT (µV/°C)

1124/25 G12

1124/25 G13

11245ff

7

For more information www.linear.com/LT1124

LT1124/LT1125

Typical perForMance characTerisTics

Offset Voltage Drift with

Temperature of Representative

Units

Small-Signal Transient Response

Supply Current vs Supply Voltage

50

40

3

2

1

0

V

=

15V

S

50mV

0

12±°C

2±°C

30

20

10

–±±°C

0

–10

–20

–30

–40

–50

–50mV

1124/25 G16

A

V

C

= +1

VCL

S

L

=

15V ꢀO 5V

= 15pF

–50 –25

0

25

50

75 100 125

0

±±

±10

±1±

±20

TEMPERATURE (°C)

SUPPLY VOLTAGE (V)

1124/25 G14

1124/2± G1±

Output Voltage Swing vs Load

Current

Common Mode Limit vs

Temperature

Large-Signal Transient Response

+

V

V –0.8

–1.0

–0.5

–1.0

V

= ±±V TO ±18V

S

10mV

0

125°C

–55°C

–1.5

–2.0

–2.5

–1.2

+

V

= 3V TO 18V

–1.4

25°C

–1.6

1.2

1.0

0.8

2.5

2.0

–

–10mV

V

= –3V TO –18V

–55°C

125°C

25°C

1.5

1124/25 G17

A

V

= –1

15V

VCL

S

0.6

–

1.0

0.5

=

–

V

0.4

V

–60

–20

20

60

100

140

–10 –8 –6 –4 –2

0

2

4

6

8

10

I

SOURCE

SINK

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

1124/25 G19

1124/25 G18

Channel Separation vs Frequency

Warm-Up Drift

180

160

140

10

8

V

=

15V

S

A

LIMITED BY

THERMAL INTERACTION

T

= 25°C

SO PACKAGE

120

100

80

V

=

15V

S

L

6

R

= 2k

V

= 7V

P-P

OUT

= 25°C

T

A

N, J PACKAGES

4

60

40

20

0

LIMITED BY PIN

TO PIN CAPACITANCE

2

0

100

1k

10k 100k 1M

10M

0

1

2

3

4

5

TIME AFTER POWER ON (MINUTES)

FREQUENCY (Hz)

1124/25 G20

1124/25 G21

11245ff

8

For more information www.linear.com/LT1124

LT1124/LT1125

Typical perForMance characTerisTics

Total Harmonic Distortion

and Noise vs Frequency for

Noninverting Gain

Total Harmonic Distortion

and Noise vs Frequency for

Inverting Gain

Total Harmonic Distortion

and Noise vs Frequency for

Competitive Devices

0.1

0.010

0.1

0.010

0.1

0.010

Z

V

A

= 2k/15pF

Z

= 2k/15pF

Z

= 2k/15pF

= 20Vp-p

= –10

L

O

V

L

O

V

L

O

V

= 20V

V

A

= 20Vp-p

V

A

P-P

= +1, +10, +100

= –1, –10, –100

MEASUREMENT BANDWIDTH

= 10Hz TO 80kHz

MEASUREMENT BANDWIDTH

= 10Hz TO 80kHz

MEASUREMENT BANDWIDTH

= 10Hz TO 80kHz

A

= +100

V

A

= –100

A

OP270

V

A

= +10

V

OP27

LT1124

= –10

V

0.001

A

= +1

V

A

= –1

V

0.0001

20

100

1k

FREQUENCY (Hz)

10k 20k

20

100

1k

FREQUENCY (Hz)

10k 20k

20

100

1k

FREQUENCY (Hz)

10k 20k

1124/25 G22

1124/25 G23

1124/25 G24

Total Harmonic Distortion and

Noise vs Output Amplitude for

Noninverting Gain

Total Harmonic Distortion and

Noise vs Output Amplitude for

Inverting Gain

Intermodulation Distortion

(CCIF Method)* vs Frequency

LT1124 and OP270

1

0.1

1

0.1

0.010

0.001

Z

L

= 2k/15pF

= 1kHz

Z = 2k/15pF

L

f (IM) = 1kHz

Z

O

A

= 2k/15pF

= 1kHz

L

f

O

A = –1, –10, –100

V

MEASUREMENT BANDWIDTH

= 10Hz TO 22kHz

f

V

A

= 13.5kHz

= 20Vp-p

= –10

= +1, +10, +100

O

V

MEASUREMENT BANDWIDTH

= 10Hz TO 22kHz

MEASUREMENT BANDWIDTH

= 10Hz TO 80kHz

A

= +100

V

OP270

LT1124

0.010

0.001

0.0001

0.010

0.001

0.0001

A

= –100

V

A

= +10

V

A

= –10

V

A

= –1

A

= +1

1

V

0.0001

0.3

10

)

30

0.3

1

10

OUTPUT SWING (Vp-p)

30

3k

10k

20k

OUTPUT SWING (V

FREQUENCY (Hz)

P-P

1124/25 G25

1124/25 G26

1124/25 G27

11245ff

9

For more information www.linear.com/LT1124

LT1124/LT1125

applicaTions inForMaTion

The LT1124 may be inserted directly into OP-270 sock-

ets. The LT1125 plugs into OP-470 sockets. Of course,

all standard dual and quad bipolar op amps can also be

replaced by these devices.

(5µV/V). However, Table 1 can be used to estimate the

expected matching performance between the two sides of

the LT1124, and between amplifiers A and D, and between

amplifiers B and C of the LT1125.

Matching Specifications

Offset Voltage and Drift

Inmanyapplicationstheperformanceofasystemdepends

on the matching between two op amps, rather than the

individual characteristics of the two devices. The three op

ampinstrumentationamplifierconfigurationshowninthis

data sheet is an example. Matching characteristics are not

100% tested on the LT1124/LT1125.

Thermocouple effects, caused by temperature gradients

across dissimilar metals at the contacts to the input termi-

nals, can exceed the inherent drift of the amplifier unless

propercareisexercised.Aircurrentsshouldbeminimized,

package leads should be short, the two input leads should

beclosetogetherandmaintainedatthesametemperature.

Some specifications are guaranteed by definition. For

example, 70µV maximum offset voltage implies that mis-

match cannot be more than 140µV. 112dB (= 2.5µV/V)

CMRR means that worst-case CMRR match is 106dB

The circuit shown in Figure 1 to measure offset voltage

is also used as the burn-in configuration for the LT1124/

LT1125, with the supply voltages increased to 16V.

50k*

15V

–

+

100Ω*

50k*

V

OUT

–15V

V

= 1000V

OS

OUT

*RESISTORS MUST HAVE LOW

THERMOELECTRIC POTENTIAL

1124/25 F01

Figure 1. Test Circuit for Offset Voltage and

Offset Voltage Drift with Temperature

Table 1. Expected Match

PARAMETER

LT1124AC/AM

LT1125AC/AM

LT1124C/M

LT1125C/M

50% YIELD

98% YIELD

110

50% YIELD

98% YIELD

130

UNITS

µV

V

Match, ∆V

LT1124

LT1125

20

30

50

0.5

7

OS

150

180

µV

Temperature Coefficient Match

Average Noninverting I

0.35

6

1.0

1.5

µV/°C

nA

18

25

B

Match of Noninverting I

CMRR Match

7

22

8

30

nA

B

126

127

115

123

127

112

dB

PSRR Match

118

114

dB

11245ff

10

For more information www.linear.com/LT1124

LT1124/LT1125

applicaTions inForMaTion

High Speed Operation

During the fast feedthrough-like portion of the output, the

input protection diodes effectively short the output to the

input and a current, limited only by the output short circuit

protection, will be drawn by the signal generator. With

When the feedback around the op amp is resistive (R ),

F

a pole will be created with R , the source resistance and

F

capacitance (R , C ), and the amplifier input capacitance

S

R ≥500Ω, the output is capable of handling the current

F

(C ≈2pF). Inlowclosedloopgainconfigurationsandwith

IN

requirements (I ≤ 20mA at 10V) and the amplifier stays

L

R and R in the kilohm range, this pole can create excess

S

F

in its active mode and a smooth transition will occur.

phase shift and even oscillation. A small capacitor (C )

F

in parallel with R eliminates this problem (see Figure 2).

F

Noise Testing

With R (C + C ) = R C the effect of the feedback pole

S

IN

F F,

Each individual amplifier is tested to 4.2nV/√Hz voltage

noise; i.e., for the LT1124 two tests, for the LT1125 four

tests are performed. Noise testing for competing multiple

op amps, if done at all, may be sample tested or tested

using the circuit shown in Figure 4.

is completely removed.

C

F

R

F

2

e

= √(e ) + (e ) + (e ) + (e )

n OUT

nA

nB

nC

nD

–

+

If the LT1125 were tested this way, the noise limit would

C

OUTPUT

IN

R

C

S

2

S

be √4 • (4.2nV/√Hz) = 8.4nV/√Hz. But is this an effective

screen? What if three of the four amplifiers are at a typical

2.7nV/√Hz, and the fourth one was contaminated and has

6.9nV/√Hz noise?

1124/25 F02

Figure 2. High Speed Operation

2

RMS Sum = √(2.7) + (2.7) + (2.7) + (6.9) = 8.33nV/√Hz

Unity Gain Buffer Applications

This passes an 8.4nV/√Hz spec, yet one of the ampli-

fiers is 64% over the LT1125 spec limit. Clearly, for

proper noise measurement, the op amps have to be tested

individually.

When R ≤ 100Ω and the input is driven with a fast, large

F

signal pulse (>1V), the output waveform will look as

shown in Figure 3.

R

F

–

OUT

–

D

+

C

–

+

–

+

B

4.5V/µs

OUTPUT

+

A

1124/25 F03

1124/25 F04

Figure 3. Unity-Gain Buffer Applications

Figure 4. Competing Quad Op Amp Noise Test Method

11245ff

11

For more information www.linear.com/LT1124

LT1124/LT1125

perForMance coMparison

Table2summarizestheperformanceoftheLT1124/LT1125

compared to the low cost grades of alternate approaches.

performance is degraded when compared to singles, for

the LT1124/LT1125 this is not the case.

The comparison shows how the specs of the LT1124/

LT1125 not only stand up to the industry standard OP-27,

but in most cases are superior. Normally dual and quad

Table 2. Guaranteed Performance, V_S= 15V, T_A= 25°C, Low Cost Devices

LT1124CN8

PARAMETER/UNITS

LT1125CN

OP-27 GP

OP-270 GP

OP-470 GP

UNITS

Voltage Noise, 1kHz

4.2

4.5

–

5.0

nV/√Hz

100% Tested

Sample Tested

No Limit

Sample Tested

Slew Rate

2.7

1.7

1.4

V/µs

MHz

100% Tested

Not Tested

Gain-Bandwidth Product

8.0

5.0

Not Tested

–

100% Tested

No Limit

Offset Voltage

Offset Current

LT1124

100

140

100

–

250

–

µV

LT1125

1000

LT1124

LT1125

20

30

75

–

20

–

30

nA

Bias Current

30

2.75

80

5.67

0.7

60

3.25

0.35

90

60

2.75

0.4

100

105

–

nA

mA

V/µV

dB

Supply Current/Amp

Voltage Gain, R = 2k

1.5

L

Common Mode Rejection Ratio

Power Supply Rejection Ratio

SO-8 Package

106

100

94

110

104

No

dB

Yes – LT1124

Yes

Typical applicaTions

Gain 1000 Amplifier with 0.01% Accuracy, DC to 1Hz

Gain Error vs Frequency Closed-Loop Gain = 1000

20k

TRIM

1.0

340k

1%

15k

5%

TYPICAL

PRECISION

OP AMP

15V

365Ω

1%

0.1

–

1/2 LT1124

OUTPUT

LT1124/LT1125

0.01

+

RN60C FILM RESISTORS

–15V

INPUT

CLOSED-LOOP GAIN

GAIN ERROR =

THE HIGH GAIN AND WIDE BANDWIDTH OF THE LT1124/LT1125, IS USEFUL IN LOW

FREQUENCY HIGH CLOSED-LOOP GAIN AMPLIFIER APPLICATIONS. A TYPICAL

PRECISION OP AMP MAY HAVE AN OPEN-LOOP GAIN OF ONE MILLION WITH 500kHz

BANDWIDTH. AS THE GAIN ERROR PLOT SHOWS, THIS DEVICE IS CAPABLE OF 0.1%

AMPLIFYING ACCURACY UP TO 0.3Hz ONLY. EVEN INSTRUMENTATION RANGE

SIGNALS CAN VARY AT A FASTER RATE. THE LT1124/LT1125 “GAIN PRECISION —

OPEN-LOOP GAIN

0.001

0.1

1

10

100

FREQUENCY (Hz)

1124/25 TA04

BANDWIDTH PRODUCT” IS 75 TIMES HIGHER, AS SHOWN.

1124/25 TA03

11245ff

12

For more information www.linear.com/LT1124

LT1124/LT1125

scheMaTic DiagraM ^{(1/2 LT1124, 1/4 LT1125)}

+

V

360µA

570µA

100µA

Q28

Q7

200pF

21k

3.6k

35pF

Q27

Q18

20Ω

Q9

Q13

Q8

Q25

OUTPUT

Q26

Q17

Q10

900Ω

Q19

Q20

20Ω

–

V

NONINVERTING

INPUT (+)

Q2A

Q1A Q1B

400Ω

20pF

Q30

Q2B

67pF

+

V

Q3

INVERTING

INPUT (–)

Q29

+

V

Q22

Q11

Q23

6k

Q12 Q15

Q16

Q24

200µA

100µA

200Ω 6k

200Ω

50Ω

–

V

1124/25 SS

11245ff

13

For more information www.linear.com/LT1124

LT1124/LT1125

package DescripTion

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

J8 Package

8-Lead CERDIP (Narrow .300 Inch, Hermetic)

(Reference LTC DWG # 05-08-1110)

.405

(10.287)

MAX

CORNER LEADS OPTION

(4 PLCS)

.005

(0.127)

MIN

6

5

4

8

7

.023 – .045

(0.584 – 1.143)

HALF LEAD

OPTION

.025

(0.635)

RAD TYP

.220 – .310

(5.588 – 7.874)

.045 – .068

(1.143 – 1.650)

FULL LEAD

OPTION

1

2

3

.200

(5.080)

MAX

.300 BSC

(7.62 BSC)

.015 – .060

(0.381 – 1.524)

.008 – .018

(0.203 – 0.457)

0° – 15°

.045 – .065

(1.143 – 1.651)

.125

3.175

MIN

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE

OR TIN PLATE LEADS

.014 – .026

(0.360 – 0.660)

.100

(2.54)

BSC

J8 0801

OBSOLETE PACKAGE

11245ff

14

For more information www.linear.com/LT1124

LT1124/LT1125

package DescripTion

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

N8 Package

8-Lead PDIP (Narrow .300 Inch)

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

.400*

(10.160)

MAX

.130 ±.005

(3.302 ±0.127)

.300 – .325

(7.620 – 8.255)

.045 – .065

(1.143 – 1.651)

8

1

7

6

5

4

.065

(1.651)

TYP

.008 – .015

(0.203 – 0.381)

.255 ±.015*

(6.477 ±0.381)

.120

(3.048)

MIN

.020

(0.508)

MIN

+.035

–.015

.325

.018 ±.003

(0.457 ±0.076)

.100

(2.54)

BSC

+0.889

8.255

2

3

N8 REV I 0711

(

)

–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 Rev G)

.189 – .197

(4.801 – 5.004)

.045 ±.005

NOTE 3

.050 BSC

7

5

8

6

.245

MIN

.160 ±.005

.150 – .157

(3.810 – 3.988)

NOTE 3

.228 – .244

(5.791 – 6.197)

.030 ±.005

TYP

1

3

4

2

RECOMMENDED SOLDER PAD LAYOUT

.010 – .020

(0.254 – 0.508)

× 45°

.053 – .069

(1.346 – 1.752)

.004 – .010

(0.101 – 0.254)

.008 – .010

(0.203 – 0.254)

0°– 8° 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)

4. PIN 1 CAN BE BEVEL EDGE OR A DIMPLE

SO8 REV G 0212

11245ff

15

For more information www.linear.com/LT1124

LT1124/LT1125

package DescripTion

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

J Package

14-Lead CERDIP (Narrow .300 Inch, Hermetic)

(Reference LTC DWG # 05-08-1110)

.785

(19.939)

MAX

.005

(0.127)

MIN

14

13

12

11

10

9

8

.220 – .310

.025

(5.588 – 7.874)

(0.635)

RAD TYP

2

3

4

5

6

1

7

.200

(5.080)

MAX

.300 BSC

(7.62 BSC)

.015 – .060

(0.381 – 1.524)

.008 – .018

(0.203 – 0.457)

0° – 15°

.045 – .065

(1.143 – 1.651)

.100

(2.54)

BSC

.125

(3.175)

MIN

.014 – .026

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE

OR TIN PLATE LEADS

(0.360 – 0.660)

J14 0801

OBSOLETE PACKAGE

11245ff

16

For more information www.linear.com/LT1124

LT1124/LT1125

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

.255 .015ꢀ

(6.477 0.381)

1

2

3

5

6

7

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)

11245ff

17

For more information www.linear.com/LT1124

LT1124/LT1125

package DescripTion

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

SW Package

16-Lead Plastic Small Outline (Wide .300 Inch)

(Reference LTC DWG # 05-08-1620)

.050 BSC .045 .005

.030 .005

TYP

.398 – .413

(10.109 – 10.490)

NOTE 4

15 14

12

10

9

N

16

N

13

11

.325 .005

.420

MIN

.394 – .419

(10.007 – 10.643)

NOTE 3

N/2

8

1

2

3

N/2

RECOMMENDED SOLDER PAD LAYOUT

2

3

5

7

1

4

6

.291 – .299

(7.391 – 7.595)

NOTE 4

.037 – .045

(0.940 – 1.143)

.093 – .104

(2.362 – 2.642)

.010 – .029

× 45°

(0.254 – 0.737)

.005

(0.127)

RAD MIN

0° – 8° TYP

.050

(1.270)

BSC

.004 – .012

.009 – .013

(0.102 – 0.305)

NOTE 3

(0.229 – 0.330)

.014 – .019

.016 – .050

(0.356 – 0.482)

TYP

(0.406 – 1.270)

NOTE:

1. DIMENSIONS IN

INCHES

(MILLIMETERS)

S16 (WIDE) 0502

2. DRAWING NOT TO SCALE

3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

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

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

11245ff

18

For more information www.linear.com/LT1124

LT1124/LT1125

revision hisTory ^{(Revision history begins at Rev D)}

REV

DATE

DESCRIPTION

PAGE NUMBER

D

09/10 LT1124-1 added. Reflected throughout the data sheet.

10/10 Revised part marking for LT1124AMPS8-1 in Order Information section.

01/14 LT1124-1 removed.

1 to 18

3

E

F

1 to 3

11245ff

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.

19

For more information www.linear.com/LT1124

LT1124/LT1125

Typical applicaTion

Strain Gauge Signal Conditioner with Bridge Excitation

15V

5k

1k

3

THE LT1124/LT1125 IS CAPABLE OF PROVIDING EXCITATION CURRENT DIRECTLY

+

2.5V

TO BIAS THE 350Ω BRIDGE AT 5V WITH ONLY 5V ACROSS THE BRIDGE (AS OPPOSED

TO THE USUAL 10V) TOTAL POWER DISSIPATION AND BRIDGE WARM-UP DRIFT IS

REDUCED. THE BRIDGE OUTPUT SIGNAL IS HALVED, BUT THE LT1124/LT1125 CAN

AMPLIFY THE REDUCED SIGNAL ACCURATELY.

1

1/4

LT1125

–

LT1009

2

–15V

REFERENCE

OUTPUT

350Ω

BRIDGE

15V

5

6

4

+

–

7

1/4

LT1125

0V TO 10V

OUTPUT

301k*

10k

ZERO

TRIM

13

–15V

1µF

301k*

15V

1/4

13

12

–

50k

14

499Ω*

GAIN

TRIM

LT1125

+

1k

*RN60C FILM RESISTORS

1124/25 TA05

–15V

relaTeD parTs

PART NUMBER

LT1007

DESCRIPTION

COMMENTS

Single Low Noise, Precision Op Amp

Single Low Noise, Precision Op Amps

Dual/Quad Precision Picoamp Input

Dual Low Noise JFET Op Amp

Decompensated LT1124/LT1125

Dual Low Noise JFET Op Amp

Single LT1113

2.5nV/√Hz 1kHz Voltage Noise

0.85nV/√Hz Voltage Noise

LT1028/LT1128

LT1112/LT1114

LT1113

250pA Max I

B

4.5nV/√Hz Voltage Noise, 10fA/√Hz Current Noise

LT1126/LT1127

LT1169

11V/µs Slew Rate

6nV/√Hz Voltage Noise, 1fA/√Hz Current Noise, 10pA Max I

4.2nV/√Hz Voltage Noise, 10fA/√Hz Current Noise

B

LT1792

LT1793

Single LT1169

6nV/√Hz Voltage Noise, 1fA/√Hz Current Noise, 10pA Max I

B

11245ff

LT 0114 REV F • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

20

For more information www.linear.com/LT1124

(408)432-1900 FAX: (408) 434-0507 www.linear.com/LT1124

●

 LINEAR TECHNOLOGY CORPORATION 1992


型号：	LT1124IS8-1#TRPBF
厂家：	Linear
描述：	IC DUAL OP-AMP, 200 uV OFFSET-MAX, 12.5 MHz BAND WIDTH, PDSO8, 0.150 INCH, LEAD FREE, PLASTIC, SOP-8, Operational Amplifier 放大器光电二极管
文件：	总20页 (文件大小：364K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT1124IS8-1#TRPBF [Linear]

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