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LT6230/LT6230-10/

LT6231/LT6232

215MHz, Rail-to-Rail Output,

1.1nV/√Hz, 3.5mA Op Amp Family

FEATURES

s

DESCRIPTIO

s

Low Noise Voltage: 1.1nV/√Hz

Low Supply Current: 3.5mA/Amp Max

Low Offset Voltage: 350µV Max

Gain Bandwidth Product:

LT6230: 215MHz; A

V

≥

1

LT6230-10: 1450MHz; A

V

≥

10

Wide Supply Range: 3V to 12.6V

Output Swings Rail-to-Rail

Common Mode Rejection Ratio 115dB Typ

Output Current: 30mA

Operating Temperature Range – 40°C to 85°C

LT6230 Shutdown to 10µA Maximum

LT6230/LT6230-10 in SOT-23 Package

Dual LT6231 in 8-Pin SO and Tiny DFN Packages

LT6232 in 16-Pin SSOP Package

The LT

®

6230/LT6231/LT6232 are single/dual/quad low

noise, rail-to-rail output unity gain stable op amps that

feature 1.1nV/√Hz noise voltage and draw only 3.5mA of

supply current per amplifier. These amplifiers combine

very low noise and supply current with a 215MHz gain

bandwidth product, a 70V/µs slew rate and are optimized

for low supply voltage signal conditioning systems. The

LT6230-10 is a single amplifier optimized for higher gain

applications resulting in higher gain bandwidth and slew

rate. The LT6230 and LT6230-10 include an enable pin

that can be used to reduce the supply current to less than

10µA.

The amplifier family has an output that swings within

50mV of either supply rail to maximize the signal dynamic

range in low supply applications and is specified on 3.3V,

5V and

±5V

supplies. The e

n

•

√I

SUPPLY

product of 1.9 per

amplifier is among the most noise efficient of any op amp.

The LT6230/LT6230-10 is available in the 6-lead SOT-23

package and the LT6231 dual is available in the 8-pin SO

package with standard pinouts. For compact layouts, the

dual is also available in a tiny dual fine pitch leadless

package (DFN). The LT6232 is available in the 16-pin

SSOP package.

APPLICATIO S

s

Ultrasound Amplifiers

Low Noise, Low Power Signal Processing

Active Filters

Driving A/D Converters

Rail-to-Rail Buffer Amplifiers

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

V

S+

IN

+

Low Noise Low Power Instrumentation Amplifier

+

1/2 LT6231

R4

499Ω

R2

196Ω

V

S

+

Noise Voltage and Unbalanced

Noise Current vs Frequency

6

5

6

V

S

=

±2.5V

T

A

= 25°C

V

CM

= 0V

5

4

3

NOISE CURRENT

2

1

2

1

R6

499Ω

NOISE VOLTAGE (nV/√Hz)

–

R1

10Ω

+

LT6202

V

OUT

4

3

–

IN

–

R3

196Ω

R5

499Ω

V

S–

R7

499Ω

1/2 LT6231

+

V

S–

A

V

= 40

BW = 5.1MHz

V

S

=

±1.5V

to

±5V

I

S

= 10mA

E

N

= 5.8µV

RMS

INPUT REFERRED,

MEASUREMENT BW = 8MHz

623012 TA01a

0

10

U

UNBALANCED NOISE CURRENT (pA/√Hz)

NOISE VOLTAGE

100

1k

10k

FREQUENCY (Hz)

0

100k

623012 TA01b

U

sn623012 623012fas

1

LT6230/LT6230-10/

LT6231/LT6232

ABSOLUTE

AXI U RATI GS

(Note 1)

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

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

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

Storage Temperature Range

(DD Package) ...................................... – 65°C to 125°C

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

Total Supply Voltage (V

+

to V

–

) ............................ 12.6V

Input Current (Note 2) ........................................

±40mA

Output Short-Circuit Duration (Note 3) ............ Indefinite

Operating Temperature Range (Note 4) ...–40°C to 85°C

Specified Temperature Range (Note 5) ....–40°C to 85°C

PACKAGE/ORDER I FOR ATIO

ORDER PART

NUMBER

TOP VIEW

OUT 1

V

–

2

+IN 3

6 V

+

5 ENABLE

4 –IN

LT6230CS6

LT6230IS6

LT6230CS6-10

LT6230IS6-10

S6 PART

MARKING*

LTAFJ

LTAFK

ORDER PART

NUMBER

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

T

JMAX

= 150°C,

θ

JA

= 250°C/W

TOP VIEW

OUT A 1

–IN A 2

+IN A 3

V

–

4

–

+

–

+

–

+

8

7

6

5

+IN A 3

V

+

OUT B

–IN B

+IN B

4

B

C

–

+

–

+

+IN B 5

S8 PACKAGE

8-LEAD PLASTIC SO

T

JMAX

= 150°C,

θ

JA

= 200°C/W

S8 PART

MARKING

6231

6231I

–IN B 6

OUT B 7

NC 8

GN PACKAGE

16-LEAD NARROW PLASTIC SSOP

T

JMAX

= 150°C,

θ

JA

= 135°C/W

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

2

+

V

+

A

D

–

LT6231CS8

LT6231IS8

U

W

W W

U

W

TOP VIEW

OUT A

–IN A

+IN A

V

–

1

2

3

4

–

+

ORDER PART

NUMBER

8

7

–

+

V

+

OUT B

–IN B

+IN B

LT6231CDD

LT6231IDD

6

5

DD PACKAGE

8-LEAD (3mm

×

3mm) PLASTIC DFN

T

JMAX

= 125°C,

θ

JA

= 160°C/W

UNDERSIDE METAL CONNECTED TO V

–

(PCB CONNECTION OPTIONAL)

DD PART

MARKING*

LAEU

ORDER PART

NUMBER

LT6232CGN

LT6232IGN

GN PART

MARKING

6232

6232I

TOP VIEW

OUT A 1

–IN A 2

16

OUT D

15 –IN D

14 +IN D

13 V

–

12 +IN C

11 –IN C

10 OUT C

9

NC

sn623012 623012fas

LT6230/LT6230-10/

LT6231/LT6232

ELECTRICAL CHARACTERISTICS

ENABLE = 0V, unless otherwise noted.

SYMBOL

V

OS

PARAMETER

Input Offset Voltage

T

A

= 25°C, V

S

= 5V, 0V; V

S

= 3.3V, 0V; V

CM

= V

OUT

= half supply,

CONDITIONS

LT6230S6, LT6230S6-10

LT6231S8, LT6232GN

LT6231DD

MIN

TYP

100

50

75

100

5

0.1

0.1Hz to 10Hz

f = 10kHz, V

S

= 5V

f = 10kHz, V

S

= 5V, R

S

= 10k

f = 10kHz, V

S

= 5V, R

S

= 10k

Common Mode

Differential Mode

Common Mode

Differential Mode

V

S

= 5V, V

O

= 0.5V to 4.5V, R

L

= 10k to V

S

/2

R

L

= 1k to V

S

/2

V

O

= 1V to 4V,

R

L

= 100Ω to V

S

/2

V

S

= 3.3V, V

O

= 0.65V to 2.65V, R

L

= 10k to V

S

/2

R

L

= 1k to V

S

/2

105

21

5.4

90

16.5

1.5

1.15

90

84

90

84

3

No Load

I

SINK

= 5mA

V

S

= 5V, I

SINK

= 20mA

V

S

= 3.3V, I

SINK

= 15mA

No Load

I

SOURCE

= 5mA

V

S

= 5V, I

SOURCE

= 20mA

V

S

= 3.3V, I

SOURCE

= 15mA

V

S

= 5V

V

S

= 3.3V

ENABLE = V

+

– 0.35V

±30

±25

4

85

240

185

5

90

325

250

±45

±40

3.15

0.2

3.5

10

40

190

460

350

50

200

600

400

115

120

115

180

1.1

1

2.4

6.5

7.5

2.9

7.7

200

40

9

175

32

4

2.65

1.7

MAX

500

350

450

600

10

0.9

0.6

UNITS

µV

µA

nV

P-P

nV/√Hz

pA/√Hz

MΩ

kΩ

pF

V/mV

V

dB

V

mV

mA

µA

Input Offset Voltage Match

(Channel-to-Channel) (Note 6)

I

B

I

OS

e

n

i

n

Input Bias Current

I

B

Match (Channel-to-Channel) (Note 6)

Input Offset Current

Input Noise Voltage

Input Noise Voltage Density

Input Noise Current Density, Balanced Source

Unbalanced Source

Input Resistance

C

IN

A

VOL

Input Capacitance

Large-Signal Gain

V

CM

CMRR

Input Voltage Range

Common Mode Rejection Ratio

CMRR Match (Channel-to-Channel) (Note 6)

Guaranteed by CMRR, V

S

= 5V, 0V

V

S

= 3.3V, 0V

V

S

= 5V, V

CM

= 1.5V to 4V

V

S

= 3.3V, V

CM

= 1.15V to 2.65V

V

S

= 5V, V

CM

= 1.5V to 4V

V

S

= 3V to 10V

V

S

= 3V to 10V

PSRR

Power Supply Rejection Ratio

PSRR Match (Channel-to-Channel) (Note 6)

Minimum Supply Voltage (Note 7)

V

OL

Output Voltage Swing LOW (Note 8)

V

OH

Output Voltage Swing HIGH (Note 8)

I

SC

I

S

Short-Circuit Current

Supply Current per Amplifier

Disabled Supply Current per Amplifier

sn623012 623012fas

3

LT6230/LT6230-10/

LT6231/LT6232

ELECTRICAL CHARACTERISTICS

ENABLE = 0V, unless otherwise noted.

SYMBOL

I

ENABLE

V

L

V

H

t

ON

t

OFF

GBW

SR

PARAMETER

ENABLE Pin Current

ENABLE Pin Input Voltage LOW

ENABLE Pin Input Voltage HIGH

Output Leakage Current

Turn-On Time

Turn-Off Time

Gain Bandwidth Product

Slew Rate

ENABLE = V

+

– 0.35V, V

O

= 1.5V to 3.5V

ENABLE = 5V to 0V, R

L

= 1k, V

S

= 5V

ENABLE = 0V to 5V, R

L

= 1k, V

S

= 5V

Frequency = 1MHz, V

S

= 5V

LT6230-10

V

S

= 5V, A

V

= –1, R

L

= 1k, V

O

= 1.5V to 3.5V

LT6230-10, V

S

= 5V, A

V

= –10, R

L

= 1k,

V

O

= 1.5V to 3.5V

FPBW

t

S

Full Power Bandwidth

Settling Time (LT6230, LT6231, LT6232)

V

S

= 5V, V

OUT

= 3V

P-P

(Note 9)

LT6230-10, HD

2

= HD

3

=

≤

1%

0.1%, V

S

= 5V, V

STEP

= 2V, A

V

= –1, R

L

= 1k

4.8

42

V

+

– 0.35V

0.2

300

41

200

1300

60

250

6.3

11

55

10

T

A

= 25°C, V

S

= 5V, 0V; V

S

= 3.3V, 0V; V

CM

= V

OUT

= half supply,

MIN

TYP

–25

MAX

–75

0.3

UNITS

µA

V

µA

ns

µs

MHz

V/µs

MHz

ns

CONDITIONS

ENABLE = 0.3V

The

q

denotes the specifications which apply over 0°C < T

A

< 70°C temperature range. V

S

= 5V, 0V; V

S

= 3.3V, 0V; V

CM

= V

OUT

= half

supply, ENABLE = 0V, unless otherwise noted.

SYMBOL

V

OS

PARAMETER

Input Offset Voltage

CONDITIONS

LT6230S6, LT6230S6-10

LT6231S8, LT6232GN

LT6231DD

q

MIN

TYP

MAX

600

450

550

800

UNITS

µV

µV/°C

µA

V/mV

Input Offset Voltage Match

(Channel-to-Channel) (Note 6)

V

OS

TC

I

B

I

OS

A

VOL

Input Offset Voltage Drift (Note 10)

Input Bias Current

I

B

Match (Channel-to-Channel) (Note 6)

Input Offset Current

Large-Signal Gain

V

S

= 5V, V

O

= 0.5V to 4.5V, R

L

= 10k to V

S

/2

R

L

= 1k to V

S

/2

R

L

= 100Ω to V

S

/2

V

O

= 1V to 4V,

V

S

= 3.3V, V

O

= 0.65V to 2.65V, R

L

= 10k to V

S

/2

R

L

= 1k to V

S

/2

V

CM

CMRR

Input Voltage Range

Common Mode Rejection Ratio

Guaranteed by CMRR, V

S

= 5V, 0V

V

S

= 3.3V, 0V

V

S

= 5V, V

CM

= 1.5V to 4V

V

S

= 3.3V, V

CM

= 1.15V to 2.65V

V

S

= 3V to 10V

V

S

= 3V to 10V

No Load

I

SINK

= 5mA

V

S

= 5V, I

SINK

= 20mA

V

S

= 3.3V, I

SINK

= 15mA

V

CM

= Half Supply

q

0.5

3

11

1

0.7

78

17

4.1

66

13

1.5

1.15

90

85

84

85

79

3

50

200

500

380

4

2.65

V

dB

V

mV

CMRR Match (Channel-to-Channel) (Note 6) V

S

= 5V, V

CM

= 1.5V to 4V

PSRR

Power Supply Rejection Ratio

PSRR Match (Channel-to-Channel) (Note 6)

Minimum Supply Voltage (Note 7)

V

OL

Output Voltage Swing LOW (Note 8)

sn623012 623012fas

4

LT6230/LT6230-10/

LT6231/LT6232

The

q

denotes the specifications which apply over 0°C < T

A

< 70°C

temperature range. V

S

= 5V, 0V; V

S

= 3.3V, 0V; V

CM

= V

OUT

= half supply, ENABLE = 0V, unless otherwise noted.

SYMBOL

V

OH

PARAMETER

Output Voltage Swing HIGH (Note 8)

CONDITIONS

No Load

I

SOURCE

= 5mA

V

S

= 5V, I

SOURCE

= 20mA

V

S

= 3.3V, I

SOURCE

= 15mA

V

S

= 5V

V

S

= 3.3V

ENABLE = V

+

– 0.25V

ENABLE = 0.3V

q

ELECTRICAL CHARACTERISTICS

MIN

TYP

MAX

60

215

650

430

UNITS

mV

mA

I

SC

I

S

I

ENABLE

V

L

V

H

t

ON

t

OFF

SR

Short-Circuit Current

Supply Current per Amplifier

Disabled Supply Current per Amplifier

ENABLE Pin Current

ENABLE Pin Input Voltage LOW

ENABLE Pin Input Voltage HIGH

Output Leakage Current

Turn-On Time

Turn-Off Time

Slew Rate

±25

±20

4.2

1

–85

0.3

V

+

– 0.25V

1

300

65

35

225

3.7

mA

µA

V

µA

ns

µs

V/µs

MHz

ENABLE = V

+

– 0.25V, V

O

= 1.5V to 3.5V

q

ENABLE = 5V to 0V, R

L

= 1k, V

S

= 5V

ENABLE = 0V to 5V, R

L

= 1k, V

S

= 5V

V

S

= 5V, A

V

= –1, R

L

= 1k, V

O

= 1.5V to 3.5V

LT6230-10, A

V

= –10, R

L

= 1k,

V

O

= 1.5V to 3.5V

FPBW

Full Power Bandwidth (Note 9)

V

S

= 5V, V

OUT

= 3V

P-P

LT6230, LT6231, LT6232

The

q

denotes the specifications which apply over – 40°C < T

A

< 85°C temperature range. V

S

= 5V, 0V; V

S

= 3.3V, 0V; V

CM

= V

OUT

= half

supply, ENABLE = 0V, unless otherwise noted. (Note 5)

SYMBOL

V

OS

PARAMETER

Input Offset Voltage

CONDITIONS

LT6230S6, LT6230S6-10

LT6231S8, LT6232GN

LT6231DD

q

MIN

TYP

MAX

700

550

650

1000

UNITS

µV

µV/°C

µA

V/mV

Input Offset Voltage Match

(Channel-to-Channel) (Note 6)

V

OS

TC

I

B

I

OS

A

VOL

Input Offset Voltage Drift (Note 10)

Input Bias Current

I

B

Match (Channel-to-Channel) (Note 6)

Input Offset Current

Large-Signal Gain

V

S

= 5V, V

O

= 0.5V to 4.5V, R

L

= 10k to V

S

/2

R

L

= 1k to V

S

/2

R

L

= 100Ω to V

S

/2

V

O

= 1V to 4V,

V

CM

= Half Supply

q

0.5

3

12

1.1

0.8

72

16

3.6

60

12

1.5

1.15

90

85

84

85

4

2.65

V

S

= 3.3V, V

O

= 0.65V to 2.65V,R

L

= 10k to V

S

/2

q

R

L

= 1k to V

S

/2

q

V

CM

CMRR

Input Voltage Range

Common Mode Rejection Ratio

CMRR Match (Channel-to-Channel) (Note 6)

PSRR

Power Supply Rejection Ratio

Guaranteed by CMRR, V

S

= 5V, 0V

V

S

= 3.3V, 0V

V

S

= 5V, V

CM

= 1.5V to 4V

V

S

= 3.3V, V

CM

= 1.15V to 2.65V

V

S

= 5V, V

CM

= 1.5V to 4V

V

S

= 3V to 10V

q

V

dB

sn623012 623012fas

5

LT6230-10

LT6230-10概述

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