LT6654AHLS8-4.096#PBF

LT6654

Precision Wide

Supply High Output Drive

Low Noise Reference

DescripTion

FeaTures

The LT^®6654 is a family of small precision voltage ref-

erences that offers high accuracy, low noise, low drift,

low dropout and low power. The LT6654 operates from

voltages up to 36V and is fully specified from –55°C to

125°C. A buffered output ensures 1ꢀmA of output drive

with low output impedance and precise load regulation.

These features, in combination, make the LT6654 ideal

for portable equipment, industrial sensing and control,

and automotive applications.

n

Low Drift:

n

A-Grade: 10ppm/°C Max

n

B-Grade: 20ppm/°C Max

n

High Accuracy:

n

A-Grade: 0ꢀ0ꢁ5 Max

B-Grade: 0ꢀ105 Max

n

Low Noise: 1ꢀ6ppm (0ꢀ1Hz to 10Hz)

P-P

Wide Supply Range to 36V

Low Thermal Hysteresis: LS8 1ꢁppm (–40°C to 12ꢁ°C)

Long Term Drift: (LS8) 1ꢁppm/√kHr

Line Regulation (Up to 36V): ꢁppm/V Max

Low Dropout Voltage: 1ꢀꢀmV Max

The LT6654 was designed with advanced manufactur-

ing techniques and curvature compensation to provide

1ꢀppm/°C temperature drift and ꢀ.ꢀ5% initial accuracy.

Low thermal hysteresis ensures high accuracy and

Sinks and Sources 1ꢀmA

Load Regulation at 1ꢀmA: 8ppm/mA Max

Fully Specified from –55°C to 125°C

Available Output Voltage Options: 1.25V, 2.ꢀ48V,

2.5V, 3V, 3.3V, 4.ꢀ96V, 5V

1.6ppm

noise minimizes measurement uncertainty.

P-P

Since the LT6654 can also sink current, it can operate

as a low power negative voltage reference with the same

precision as a positive reference.

n

Low Profile (1mm) ThinSOT™ Package and 5mm ×

5mm Surface Mount Hermetic Package

The LT6654 references are offered in 6-lead SOT-23

package and an 8-lead LS8 package. The LS8 is a 5mm

× 5mm surface mount hermetic package that provides

outstanding stability.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their

respective owners.

applicaTions

n

Automotive Control and Monitoring

n

High Temperature Industrial

n

High Resolution Data Acquisition Systems

Instrumentation and Process Control

Precision Regulators

Medical Equipment

n

Typical applicaTion

Output Voltage Temperature Drift

0.10

3 TYPICAL PARTS

LT6654-2.5

Basic Connection

0.05

(V

+ 0.5V) < V < 36V

IN

LT6654

GND

V

OUT

IN

OUT

C

IN

0.1µF

L

0.00

–0.05

–0.10

1µF

6654 TA01a

–60 –40 –20

0

20 40

TEMPERATURE (°C)

6654 TA01b

6654fh

1

For more information www.linear.com/LT6654

LT6654

absoluTe MaxiMuM raTings

(Note 1)

Input Voltage V to GND ........................... –ꢀ.3V to 38V

Operating Temperature Range ............... –55°C to 125°C

Storage Temperature Range (Note 2)..... –65°C to 15ꢀ°C

Lead Temperature (Soldering, 1ꢀ sec.)

IN

Output Voltage V

........................ –ꢀ.3V to V + ꢀ.3V

OUT

IN

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

Specified Temperature Range

(Note 9).................................................................3ꢀꢀ°C

I-Grade.................................................–4ꢀ°C to 85°C

H-Grade ............................................. –4ꢀ°C to 125°C

MP-Grade .......................................... –55°C to 125°C

pin conFiguraTion

TOP VIEW

V

IN

TOP VIEW

8

DNC

NC

1

2

3

7

6

5

DNC

GND* 1

GND 2

DNC 3

6 V

OUT

5 DNC

4 V

V

OUT

V

OUT

IN

GND

4

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

GND*

LS8 PACKAGE

8-PIN LEADLESS CHIP CARRIER (5mm × 5mm)

T

= 15ꢀ°C, θ = 192°C/W

JA

DNC: CONNECTED INTERNALLY

DO NOT CONNECT EXTERNAL

JMAX

T

= 15ꢀ°C, θ = 125°C/W

JA

DNC: CONNECTED INTERNALLY

DO NOT CONNECT EXTERNAL

JMAX

CIRCUITRY TO THESE PINS

*CONNECT PIN TO DEVICE GND (PIN 2)

CIRCUITRY TO THESE PINS

*CONNECT PIN TO DEVICE GND (PIN 3)

orDer inForMaTion ^{http://wwwꢀlinearꢀcom/product/LT66ꢁ4#orderinfo}

Lead Free Finish

TAPE AND REEL (MINI)

TAPE AND REEL

PART MARKING* PACKAGE DESCRIPTION

SPECIFIED TEMPERATURE RANGE

–4ꢀ°C to 85°C

LT6654AIS6-1.25#TRMPBF

LT6654BIS6-1.25#TRMPBF

LT6654AHS6-1.25#TRMPBF

LT6654BHS6-1.25#TRMPBF

LT6654AMPS6-1.25#TRMPBF

LT6654BMPS6-1.25#TRMPBF

LT6654AIS6-2.ꢀ48#TRMPBF

LT6654BIS6-2.ꢀ48#TRMPBF

LT6654AHS6-2.ꢀ48#TRMPBF

LT6654BHS6-2.ꢀ48#TRMPBF

LT6654AIS6-1.25#TRPBF

LT6654BIS6-1.25#TRPBF

LT6654AHS6-1.25#TRPBF

LT6654BHS6-1.25#TRPBF

LT6654AMPS6-1.25#TRPBF

LT6654BMPS6-1.25#TRPBF

LT6654AIS6-2.ꢀ48#TRPBF

LT6654BIS6-2.ꢀ48#TRPBF

LT6654AHS6-2.ꢀ48#TRPBF

LT6654BHS6-2.ꢀ48#TRPBF

LTFVD

LTFVF

6-Lead Plastic TSOT-23

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

–4ꢀ°C to 85°C

LT6654AMPS6-2.ꢀ48#TRMPBF LT6654AMPS6-2.ꢀ48#TRPBF LTFVF

LT6654BMPS6-2.ꢀ48#TRMPBF LT6654BMPS6-2.ꢀ48#TRPBF LTFVF

LT6654AIS6-2.5#TRMPBF

LT6654BIS6-2.5#TRMPBF

LT6654AIS6-2.5#TRPBF

LT6654BIS6-2.5#TRPBF

LTFJY

–4ꢀ°C to 85°C

6654fh

2

For more information www.linear.com/LT6654

LT6654

orDer inForMaTion ^{http://wwwꢀlinearꢀcom/product/LT66ꢁ4#orderinfo}

Lead Free Finish

TAPE AND REEL (MINI)

TAPE AND REEL

PART MARKING* PACKAGE DESCRIPTION

SPECIFIED TEMPERATURE RANGE

–4ꢀ°C to 125°C

–55°C to 125°C

–4ꢀ°C to 85°C

LT6654AHS6-2.5#TRMPBF

LT6654BHS6-2.5#TRMPBF

LT6654AMPS6-2.5#TRMPBF

LT6654BMPS6-2.5#TRMPBF

LT6654AIS6-3#TRMPBF

LT6654AHS6-2.5#TRPBF

LT6654BHS6-2.5#TRPBF

LT6654AMPS6-2.5#TRPBF

LT6654BMPS6-2.5#TRPBF

LT6654AIS6-3#TRPBF

LTFJY

LTFVG

LTFVH

LTFVJ

6-Lead Plastic TSOT-23

LT6654BIS6-3#TRMPBF

LT6654BIS6-3#TRPBF

–4ꢀ°C to 85°C

LT6654AHS6-3#TRMPBF

LT6654BHS6-3#TRMPBF

LT6654AMPS6-3#TRMPBF

LT6654BMPS6-3#TRMPBF

LT6654AIS6-3.3#TRMPBF

LT6654BIS6-3.3#TRMPBF

LT6654AHS6-3.3#TRMPBF

LT6654BHS6-3.3#TRMPBF

LT6654AMPS6-3.3#TRMPBF

LT6654BMPS6-3.3#TRMPBF

LT6654AIS6-4.ꢀ96#TRMPBF

LT6654BIS6-4.ꢀ96#TRMPBF

LT6654AHS6-4.ꢀ96#TRMPBF

LT6654BHS6-4.ꢀ96#TRMPBF

LT6654AHS6-3#TRPBF

LT6654BHS6-3#TRPBF

LT6654AMPS6-3#TRPBF

LT6654BMPS6-3#TRPBF

LT6654AIS6-3.3#TRPBF

LT6654BIS6-3.3#TRPBF

LT6654AHS6-3.3#TRPBF

LT6654BHS6-3.3#TRPBF

LT6654AMPS6-3.3#TRPBF

LT6654BMPS6-3.3#TRPBF

LT6654AIS6-4.ꢀ96#TRPBF

LT6654BIS6-4.ꢀ96#TRPBF

LT6654AHS6-4.ꢀ96#TRPBF

LT6654BHS6-4.ꢀ96#TRPBF

–4ꢀ°C to 125°C

–55°C to 125°C

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

–4ꢀ°C to 85°C

LT6654AMPS6-4.ꢀ96#TRMPBF LT6654AMPS6-4.ꢀ96#TRPBF LTFVJ

LT6654BMPS6-4.ꢀ96#TRMPBF LT6654BMPS6-4.ꢀ96#TRPBF LTFVJ

LT6654AIS6-5#TRMPBF

LT6654BIS6-5#TRMPBF

LT6654AHS6-5#TRMPBF

LT6654BHS6-5#TRMPBF

LT6654AMPS6-5#TRMPBF

LT6654BMPS6-5#TRMPBF

LT6654AIS6-5#TRPBF

LT6654BIS6-5#TRPBF

LT6654AHS6-5#TRPBF

LT6654BHS6-5#TRPBF

LT6654AMPS6-5#TRPBF

LT6654BMPS6-5#TRPBF

PART MARKING*

542ꢀ48

LTFVK

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

SPECIFIED TEMPERATURE RANGE

–4ꢀ°C to 125°C

†

LEAD FREE FINISH

PACKAGE DESCRIPTION

LT6654AHLS8-2.ꢀ48#PBF

LT6654BHLS8-2.ꢀ48#PBF

LT6654AHLS8-2.5#PBF

LT6654BHLS8-2.5#PBF

LT6654AHLS8-4.ꢀ96#PBF

LT6654BHLS8-4.ꢀ96#PBF

LT6654AHLS8-5#PBF

8-Lead Ceramic LCC (5mm × 5mm)

542ꢀ48

665425

544ꢀ96

66545

LT6654BHLS8-5#PBF

66545

TRM = 5ꢀꢀ pieces. *Temperature grades are identified by a label on the shipping container.

Consult LTC Marketing for parts specified with wider operating temperature ranges.

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/. Some packages are available in 5ꢀꢀ unit reels through

designated sales channels with #TRMPBF suffix.

†

This product is only offered in trays. For more information go to: http://www.linear.com/packaging/

6654fh

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For more information www.linear.com/LT6654

LT6654

available opTions

OUTPUT VOLTAGE

INITIAL ACCURACY

TEMPERATURE COEFFICIENT

ORDER PART NUMBER**

SPECIFIED TEMPERATURE RANGE

1.25V

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-1.25

LT6654BIS6-1.25

LT6654AHS6-1.25

LT6654BHS6-1.25

LT6654AMPS6-1.25

LT6654BMPS6-1.25

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

2.ꢀ48V

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-2.ꢀ48

LT6654BIS6-2.ꢀ48

LT6654AHS6-2.ꢀ48

LT6654AHLS8-2.ꢀ48

LT6654BHS6-2.ꢀ48

LT6654BHLS8-2.ꢀ48

LT6654AMPS6-2.ꢀ48

LT6654BMPS6-2.ꢀ48

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

2.5V

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-2.5

LT6654BIS6-2.5

LT6654AHS6-2.5

LT6654AHLS8-2.5

LT6654BHS6-2.5

LT6654BHLS8-2.5

LT6654AMPS6-2.5

LT6654BMPS6-2.5

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

3V

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-3

LT6654BIS6-3

LT6654AHS6-3

LT6654BHS6-3

LT6654AMPS6-3

LT6654BMPS6-3

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

3.3V

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-3.3

LT6654BIS6-3.3

LT6654AHS6-3.3

LT6654BHS6-3.3

LT6654AMPS6-3.3

LT6654BMPS6-3.3

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

4.ꢀ96V

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-4.ꢀ96

LT6654BIS6-4.ꢀ96

LT6654AHS6-4.ꢀ96

LT6654AHLS8-4.ꢀ96

LT6654BHS6-4.ꢀ96

LT6654BHLS8-4.ꢀ96

LT6654AMPS6-4.ꢀ96

LT6654BMPS6-4.ꢀ96

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

5V

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

ꢀ.ꢀ5%

ꢀ.1%

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

1ꢀppm/°C

2ꢀppm/°C

LT6654AIS6-5

LT6654BIS6-5

–4ꢀ°C to 85°C

–4ꢀ°C to 125°C

–55°C to 125°C

LT6654AHS6-5

LT6654AHLS8-5

LT6654BHS6-5

LT6654BHLS8-5

LT6654AMPS6-5

LT6654BMPS6-5

** See the Order Information section for complete part number listing.

6654fh

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For more information www.linear.com/LT6654

LT6654

elecTrical characTerisTics ^Thel denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_A= 2ꢁ°C, C_L= 1µF and V_IN= V_OUT+ 0ꢀꢁV, unless otherwise notedꢀ

For LT66ꢁ4-1ꢀ2ꢁ, V_IN= 2ꢀ4V, unless otherwise notedꢀ

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Output Voltage Accuracy

LT6654A

–ꢀ.ꢀ5

–ꢀ.1ꢀ

–ꢀ.175

–ꢀ.35

–ꢀ.215

–ꢀ.43

–ꢀ.23

–ꢀ.46

ꢀ.ꢀ5

ꢀ.1ꢀ

ꢀ.175

ꢀ.35

ꢀ.215

ꢀ.43

ꢀ.23

ꢀ.46

%

LT6654B

l

LT6654AI

LT6654BI

LT6654AH

LT6654BH

LT6654AMP

LT6654BMP

l

Output Voltage Temperature Coefficient (Note 3)

Line Regulation

LT6654A

LT6654B

3

1ꢀ

2ꢀ

ppm/°C

1ꢀ

V

OUT

+ ꢀ.5V ≤ V ≤ 36V

IN

LT6654-2.ꢀ48, LT6654-2.5, LT6654-3,

LT6654-3.3, LT6654-4.ꢀ96, LT6654-5

1.2

5

1ꢀ

ppm/V

l

2.4V ≤ V ≤ 36V

5

1ꢀ

ppm/V

IN

LT6654-1.25

Load Regulation (Note 4)

I

= 1ꢀmA

OUT(SOURCE)

LT6654-2.ꢀ48, LT6654-2.5, LT6654-3,

LT6654-3.3, LT6654-4.ꢀ96, LT6654-5

LT6654-1.25

3

6

8

ppm/mA

l

15

2ꢀ

3ꢀ

45

LT6654LS8

1ꢀ

I

= 1ꢀmA

OUT(SINK)

LT6654-2.ꢀ48, LT6654-2.5, LT6654-3,

LT6654-3.3, LT6654-4.ꢀ96, LT6654-5

LT6654-1.25

9

2ꢀ

3ꢀ

25

3ꢀ

6ꢀ

9ꢀ

ppm/mA

l

15

3ꢀ

LT6654LS8

Dropout Voltage (Note 5)

Minimum Input Voltage

V

– V , ∆V

OUT

= ꢀ.1%

IN

OUT

I

= ꢀmA

55

1ꢀꢀ

12ꢀ

mV

l

LT6654-2.ꢀ48, LT6654-2.5, LT6654-3,

LT6654-3.3, LT6654-4.ꢀ96, LT6654-5

l

I

= 1ꢀmA

45ꢀ

5ꢀ

mV

OUT(SOURCE)

OUT(SINK)

= –1ꢀmA

LT6654-1.25, ∆V

= ꢀ.1%, I

= ꢀmA

1.5

1.6

1.8

2.4

V

OUT

l

LT6654-1.25, ∆V

No Load

= ꢀ.1%, I

= 1ꢀmA

OUT

Supply Current

35ꢀ

µA

l

6ꢀꢀ

Output Short-Circuit Current

Output Voltage Noise (Note 6)

Short V

to GND

4ꢀ

3ꢀ

mA

OUT

to V

IN

ꢀ.1Hz ≤ f ≤ 1ꢀHz

LT6654-1.25

LT6654-2.ꢀ48

LT6654-2.5

ꢀ.8

1.ꢀ

1.5

1.6

1.7

2.ꢀ

2.2

2.ꢀ

ppm

P-P

RMS

LT6654-3

LT6654-3.3

LT6654-4.ꢀ96

LT6654-5

1ꢀHz ≤ f ≤ 1kHz

ppm

Turn-On Time

ꢀ.1% Settling, C

= 1µF

15ꢀ

µs

LOAD

6654fh

5

For more information www.linear.com/LT6654

LT6654

elecTrical characTerisTics ^Thel denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_A= 2ꢁ°C, C_L= 1µF and V_IN= V_OUT+ 0ꢀꢁV, unless otherwise notedꢀ

For LT66ꢁ4-1ꢀ2ꢁ, V_IN= 2ꢀ4V, unless otherwise notedꢀ

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Long-Term Drift of Output Voltage (Note 7)

LT6654S6

LT6654LS8

6ꢀ

15

ppm/√kHr

Hysteresis (Note 8)

S6

∆T = ꢀ°C to 7ꢀ°C

15

3ꢀ

4ꢀ

5ꢀ

ppm

∆T = –4ꢀ°C to 85°C

∆T = –4ꢀ°C to 125°C

∆T = –55°C to 125°C

LS8

∆T = ꢀ°C to 7ꢀ°C

3

ppm

∆T = –4ꢀ°C to 85°C

∆T = –4ꢀ°C to 125°C

∆T = –55°C to 125°C

11

15

2ꢀ

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 2: If the parts are stored outside of the specified temperature range,

the output may shift due to hysteresis.

Note 7: Long-term stability typically has a logarithmic characteristic

and therefore, changes after 1ꢀꢀꢀ hours tend to be much smaller than

before that time. Total drift in the second thousand hours is normally less

than one third that of the first thousand hours with a continuing trend

toward reduced drift with time. Long-term stability will also be affected by

differential stresses between the IC and the board material created during

board assembly.

Note 3: Temperature coefficient is measured by dividing the maximum

Note 8: Hysteresis in output voltage is created by package stress that

differs depending on whether the IC was previously at a higher or

lower temperature. Output voltage is always measured at 25°C, but

the IC is cycled to the hot or cold temperature limit before successive

measurements. Hysteresis measures the maximum output change for the

averages of three hot or cold temperature cycles. For instruments that

are stored at well controlled temperatures (within 2ꢀ or 3ꢀ degrees of

operational temperature), it is usually not a dominant error source. Typical

hysteresis is the worst-case of 25°C to cold to 25°C or 25°C to hot to

25°C, preconditioned by one thermal cycle.

change in output voltage by the specified temperature range.

Note 4: Load regulation is measured on a pulse basis from no load to the

specified load current. Output changes due to die temperature change

must be taken into account separately.

Note ꢁ: Excludes load regulation errors.

Note 6: Peak-to-peak noise is measured with a 1-pole highpass filter at

ꢀ.1Hz and 2-pole lowpass filter at 1ꢀHz. The unit is enclosed in a still-air

environment to eliminate thermocouple effects on the leads. The test

time is 1ꢀ seconds. RMS noise is measured on a spectrum analyzer in

a shielded environment where the intrinsic noise of the instrument is

removed to determine the actual noise of the device.

Note 9: The stated temperature is typical for soldering of the leads during

manual rework. For detailed IR reflow recommendations, refer to the

Applications Information section.

6654fh

6

For more information www.linear.com/LT6654

LT6654

The characteristic curves are similar across the

Typical perForMance characTerisTics

LT66ꢁ4 familyꢀ Curves from the LT66ꢁ4-1ꢀ2ꢁ, LT66ꢁ4-2ꢀꢁ and the LT66ꢁ4-ꢁ represent the full range of typical performance of all

voltage optionsꢀ Characteristic curves for other output voltages fall between these curves and can be estimated based on their outputꢀ

1ꢀ2ꢁV Output Voltage

Temperature Drift

1ꢀ2ꢁV Output Impedance

vs Frequency

1ꢀ2ꢁV Turn-On Characteristics

1.2520

1.2515

1.2510

1.2505

1.2500

1.2495

1.2490

1.2485

100

10

THREE TYPICAL PARTS

V

IN

1V/DIV

C

= 1µF

L

GND

1

V

OUT

0.5V/DIV

C = 10µF

L

0.1

GND

0.01

6654 G02

–60 –40 –20

0

20 40 60 80 100 120 140

0.1

1

10

FREQUENCY (kHz)

100

20µs/DIV

C

= 1µF

LOAD

TEMPERATURE (°C)

6654 G01

6654 G03

1ꢀ2ꢁV Load Regulation (Sourcing)

1ꢀ2ꢁV Load Regulation (Sinking)

1ꢀ2ꢁV Output Noise 0ꢀ1Hz to 10Hz

30

20

200

180

160

140

120

100

80

125°C

–55°C

–40°C

10

0

–10

–20

–30

–40

–50

25°C

125°C

60

40

–40°C

–55°C

20

0

1

2

3

4

5

6

7

8

9

10

0.1

1

0.1

1

TIME (1s/DIV)

OUTPUT CURRENT (mA)

6654 G06

6654 G04

6654 G05

1ꢀ2ꢁV Minimum Input Voltage

(Sourcing)

1ꢀ2ꢁV Minimum Input Voltage

(Sinking)

1ꢀ2V Output Voltage Noise

Spectrum

10

400

350

300

250

200

25°C

125°C

25°C

–55°C

125°C

–40°C

1

–55°C

150

100

50

–40°C

I

= 0µA

O

I

= 5mA

O

0.1

0

1

1.2 1.4 1.6 1.8

MINIMUM INPUT VOLTAGE (V)

2

2.2

1

1.1 1.2 1.3 1.4 1.5 1.6 1.7

MINIMUM INPUT VOLTAGE (V)

0.01

0.1

1

10

FREQUENCY (kHz)

6654 G07

6654 G08

6654 G09

6654fh

7

For more information www.linear.com/LT6654

LT6654

The characteristic curves are similar across the

Typical perForMance characTerisTics

LT66ꢁ4 familyꢀ Curves from the LT66ꢁ4-1ꢀ2ꢁ, LT66ꢁ4-2ꢀꢁ and the LT66ꢁ4-ꢁ represent the full range of typical performance of all

voltage optionsꢀ Characteristic curves for other output voltages fall between these curves and can be estimated based on their outputꢀ

2ꢀꢁV Output Voltage

Temperature Drift

2ꢀꢁV Supply Current

vs Input Voltage

2ꢀꢁV Line Regulation

2.502

2.501

2.500

2.499

2.498

600

500

400

300

200

100

0

2.5050

2.5040

2.5030

2.5020

2.5010

2.5000

2.4990

2.4980

2.4970

2.4960

2.4950

THREE TYPICAL PARTS

–40°C

–55°C

25°C

125°C

25°C

125°C

–55°C

–40°C

–60

–20

20

60

100

140

0

5

10 15 20 25 30 35

INPUT VOLTAGE (V)

0

5

10 15 20 25 30 35

INPUT VOLTAGE (V)

TEMPERATURE (°C)

6654 G10

6654 G11

6654 G12

2ꢀꢁV Load Regulation (Sourcing)

2ꢀꢁV Load Regulation (Sinking)

2ꢀꢁV Output Noise 0ꢀ1Hz to 10Hz

10

0

180

160

140

120

100

80

–55°C

–40°C

125°C

–10

–20

–30

–40

125°C

25°C

60

40

–40°C

20

–55°C

0

6654 G15

0.1

1

0.1

1

TIME (1s/DIV)

OUTPUT CURRENT (mA)

6654 G13

6654 G14

2ꢀꢁV Minimum V_INto V_OUT

Differential (Sourcing)

2ꢀꢁV Minimum V_INto V_OUT

Differential (Sinking)

2ꢀꢁV Output Voltage Noise

Spectrum

10

400

350

300

250

200

–55°C

25°C

–55°C

–40°C

125°C

25°C

I

= 0µA

125°C

O

1

150

100

50

I

= 5mA

O

0.1

0

50 100 150 200 250 300

INPUT-OUTPUT VOLTAGE (mV)

–300 –250 –200 –150 –100 –50

0

0.01

0.1

1

10

INPUT-OUTPUT VOLTAGE (mV)

FREQUENCY (kHz)

6654 G16

6654 G17

6654 G18

6654fh

8

For more information www.linear.com/LT6654

LT6654

The characteristic curves are similar across the

Typical perForMance characTerisTics

LT66ꢁ4 familyꢀ Curves from the LT66ꢁ4-1ꢀ2ꢁ, LT66ꢁ4-2ꢀꢁ and the LT66ꢁ4-ꢁ represent the full range of typical performance of all

voltage optionsꢀ Characteristic curves for other output voltages fall between these curves and can be estimated based on their outputꢀ

2ꢀꢁV Integrated Noise

10Hz to 10kHz

2ꢀꢁV Power Supply Rejection

Ratio vs Frequency

2ꢀꢁV Output Impedance

vs Frequency

100

10

1

–20

–30

–40

–50

–60

100

10

1

C

= 1µF

L

C

= 1µF

L

–70

–80

C

= 10µF

100

L

C

= 10µF

L

–90

0.1

–100

0.1

0.01

0.1

1

0.1

1

10

FREQUENCY (kHz)

1

10

100

FREQUENCY (kHz)

6654 G19

6654 G20

6654 G21

2ꢀꢁV Load Transient Response

(Sourcing)

2ꢀꢁV Turn-On Characteristics

2ꢀꢁV Line Transient Response

V

IN

0.5V/DIV

3V/DC

I

OUT

0mA

V

IN

1V/DIV

5mA

GND

V

OUT

2mV/DIV/AC

2.5V/DC

20mV/DIV/AC

V

OUT

2.5V/DC

1V/DIV

GND

6654 G22

6654 G23

6654 G24

20µs/DIV

50µs/DIV

C

= 1µF

C

= 1µF

C

= 1µF

LOAD

2ꢀꢁV Hysteresis Plot for –40°C

and 12ꢁ°C (TSOT-23)

2ꢀꢁV Hysteresis Plot for –40°C

and 12ꢁ°C (LS8)

2ꢀꢁV Long Term Drift (TSOT-23)

48

44

40

36

32

28

24

20

16

12

8

6

5

4

3

2

1

0

150

120

90

MAX AVG HOT CYCLE MAX AVG COLD CYCLE

25°C TO 125°C TO 25°C 25°C TO –40°C TO 25°C

T

= 35°C

25°C TO –40°C TO 25°C

AND 25°C TO 125°C TO 25°C

A

60

30

0

–30

–60

–90

–120

–150

4

0

–150–125 –100–75–50 –25 0 25 50 75 100125 150

DISTRIBUTION (ppm)

0

400

800

1200

1600

–40 –30 –20 –10

0

10 20 30 40

TIME (HOURS)

DISTRIBUTION (ppm)

6654 G25

6654 G26

6654 G37

6654fh

9

For more information www.linear.com/LT6654

LT6654

The characteristic curves are similar across the

Typical perForMance characTerisTics

LT66ꢁ4 familyꢀ Curves from the LT66ꢁ4-1ꢀ2ꢁ, LT66ꢁ4-2ꢀꢁ and the LT66ꢁ4-ꢁ represent the full range of typical performance of all

voltage optionsꢀ Characteristic curves for other output voltages fall between these curves and can be estimated based on their outputꢀ

2ꢀꢁV Load Transient Response

(Sinking)

ꢁV Output Voltage Temperature

Drift

2ꢀꢁV Long Term Drift (LS8)

150

120

90

5.003

5.002

5.001

5.000

4.999

4.998

4.997

4.996

4.995

4.994

4.993

THREE TYPICAL PARTS

I

OUT

5mA

60

0mA

30

0

–30

–60

–90

–120

–150

V

OUT

20mV/DIV/AC

2.5V/DC

6654 G27

0

500

1000

1500

2000

–60 –40 –20

0

20 40 60 80 100 120

50µs/DIV

C

= 1µF

LOAD

TIME (HOURS)

TEMPERATURE (°C)

6654 G38

6654 G28

ꢁV Output Impedance

vs Frequency

ꢁV Turn-On Characteristics

ꢁV Load Regulation (Sourcing)

100

10

50

40

30

V

IN

2V/DIV

C

= 1µF

L

20

–55°C

–40°C

GND

1

10

V

OUT

125°C

0

C

= 10µF

0.1

0.01

L

2V/DIV

25°C

–10

GND

–20

6654 G29

0.1

1

10

FREQUENCY (kHz)

100

0.1

1

50µs/DIV

C

= 1µF

LOAD

OUTPUT CURRENT (mA)

6654 G30

6654 G31

ꢁV Minimum V_INto V_OUT

Differential (Sourcing)

ꢁV Load Regulation (Sinking)

ꢁV Output Noise 0ꢀ1Hz to 10Hz

220

200

180

160

140

120

100

80

10

25°C

–55°C

–40°C

125°C

–55°C

–40°C

1

125°C

60

25°C

40

20

0

0.1

0

1

2

3

4

5

6

7

8

9

10

0.1

1

0

50 100 150 200 250 300 350

INPUT-OUTPUT VOLTAGE (mV)

TIME (1s/DIV)

OUTPUT CURRENT (mA)

6654 G33

6654 G32

6654 G34

6654fh

10

For more information www.linear.com/LT6654

LT6654

The characteristic curves are similar across the

Typical perForMance characTerisTics

LT66ꢁ4 familyꢀ Curves from the LT66ꢁ4-1ꢀ2ꢁ, LT66ꢁ4-2ꢀꢁ and the LT66ꢁ4-ꢁ represent the full range of typical performance of all

voltage optionsꢀ Characteristic curves for other output voltages fall between these curves and can be estimated based on their outputꢀ

ꢁV Minimum V_INto V_OUT

Differential (Sinking)

ꢁV Output Voltage Noise

Spectrum

10

600

550

500

450

400

350

300

250

200

150

100

50

–55°C

I

= 0µA

O

25°C

125°C

–40°C

1

I

O

= 5mA

0.1

0

–300 –250 –200 –150 –100 –50

0

50

0.01

0.1

1

10

INPUT-OUTPUT VOLTAGE (mV)

FREQUENCY (kHz)

6654 G35

6654 G36

pin FuncTions

(LS8)

(TSOT)

DNC (Pins 1, 7): Do Not Connect. Keep leakage current

from this pin to V or GND to a minimum.

GND (Pin 1): Internal Function. This pin must be tied to

ground, near Pin 2.

IN

NC (Pin 2): Not internally connected. May be tied to V ,

OUT

GND (Pin 2): Primary Device Ground.

IN

V

, GND or floated.

DNC (Pin 3): Do Not Connect. Keep leakage current from

GND (Pin 3): Internal Function. This pin must be tied to

GND near Pin 4.

this pin to V or GND to a minimum.

IN

V

(Pin 4): Power Supply. Bypass V with a ꢀ.1µF

IN

GND (Pin 4): Primary Device Ground. Pin 3 and the load

ground should be star-connected to Pin 4.

capacitor to ground.

DNC (Pin ꢁ): Do Not Connect. Keep leakage current from

V

(Pin ꢁ): V

Pin. An output capacitor of 1µF or

this pin to V or GND to a minimum.

OUT

IN

greater is required for stable operation.

V

(Pin 6): Output Voltage. An output capacitor of 1µF

OUT

V

(Pin 6): V Pin. Tie to Pin 5 for proper load regu-

minimum is required for stable operation.

OUT

lation.

OUT

V

(Pin 8): Power Supply. Bypass V with a ꢀ.1µF, or

IN

larger, capacitor to GND.

6654fh

11

For more information www.linear.com/LT6654

LT6654

block DiagraMs

V

IN

8

DNC

7

1

+

–

V

OUT

BANDGAP

5

6

OUT

GND

3

4

NC

2

6654 BDa

LS8

V

IN

4

DNC

3

5

+

–

V

OUT

BANDGAP

6

1

GND

2

6654 BD

SOT23

6654fh

12

For more information www.linear.com/LT6654

LT6654

applicaTions inForMaTion

Bypass and Load Capacitors

The LT6654 voltage references should have an input by-

pass capacitor of ꢀ.1µF or larger, however the bypassing

on other components nearby is sufficient. In high voltage

V

IN

1V/DIV

GND

applications, V > 3ꢀV, an output short-circuit to ground

IN

can create an input voltage transient that could exceed the

maximum input voltage rating. To prevent this worst-case

condition, an RC input line filter of 1ꢀµs (i.e. 1ꢀΩ and 1µF)

is recommended. These references also require an output

capacitorforstability.Theoptimumoutputcapacitancefor

most applications is 1µF, although larger values work as

well. This capacitor affects the turn-on and settling time

for the output to reach its final value.

V

OUT

1V/DIV

GND

6654 F01

20µs/DIV

C

= 1µF

LOAD

Figure 1ꢀ Turn-On Characteristics of LT66ꢁ4-2ꢀꢁ

Figure 1 shows the turn-on time for the LT6654-2.5 with a

ꢀ.1µF input bypass and 1µF load capacitor. Figure 2 shows

V

IN

0.5V/DIV

3V/DC

the output response to a ꢀ.5V transient on V with the

IN

same capacitors.

The test circuit of Figure 3 is used to measure the stability

with various load currents. With R = 1k, the 1V step pro-

L

V

OUT

duces a current step of 1mA. Figure 4 shows the response

to a ꢀ.5mA load. Figure 5 is the output response to a

sourcingstepfrom4mAto5mA,andFigure 6istheoutput

response of a sinking step from 4mA to 5mA.

2mV/DIV/AC

2.5V/DC

6654 F02

50µs/DIV

C

= 1µF

LOAD

Figure 2ꢀ Output Response to 0ꢀꢁV Ripple on V_IN

1k

V

IN

LT6654-2.5

GND

IN

OUT

3V

C

L

IN

1V

V

GEN

1µF

0.1µF

6654 F03

Figure 3ꢀ Load Current Response Time Test Circuit

6654fh

13

For more information www.linear.com/LT6654

LT6654

applicaTions inForMaTion

Positive or Negative Operation

I

OUT

In addition to the series connection, as shown on the front

page of this data sheet, the LT6654 can be operated as a

negative voltage reference.

–0.5mA

0.5mA

The circuit in Figure 7 shows an LT6654 configured for

negative operation. In this configuration, a positive volt-

V

OUT

age is required at V (Pin 4) to bias the LT6654 internal

20mV/DIV/AC

2.5V/DC

IN

circuitry. This voltage must be current limited with R1 to

keep the output PNP transistor from turning on and driv-

ing the grounded output. C1 provides stability during load

transients.Thisconnectionmaintainsthesameaccuracyand

temperature coefficient of the positive connected LT6654.

6654 F04

50µs/DIV

C

= 1µF

LOAD

Figure 4ꢀ LT66ꢁ4-2ꢀꢁ Sourcing and Sinking 0ꢀꢁmA

R1

4.7k

3V

I

OUT

4mA

IN

5mA

LT6654-2.5

GND

OUT

0.1µF

V

= –2.5V

OUT

V

– V

OUT

C1

1µF

OUT

EE

R ≤

10mV/DIV/AC

550µA + I

OUT

2.5V/DC

V

6654 F07

EE

6654 F05

Figure 7ꢀ Using the LT66ꢁ4-2ꢀꢁ to Build a –2ꢀꢁV Reference

50µs/DIV

C

= 1µF

LOAD

Figure ꢁꢀ LT66ꢁ4-2ꢀꢁ Sourcing 4mA to ꢁmA

I

OUT

–5mA

–4mA

V

OUT

10mV/DIV/AC

2.5V/DC

6654 F06

50µs/DIV

C

= 1µF

LOAD

Figure 6ꢀ LT66ꢁ4-2ꢀꢁ Sinking 4mA to ꢁmA

6654fh

14

For more information www.linear.com/LT6654

LT6654

applicaTions inForMaTion

Long-Term Drift

Long-termdriftcannotbeextrapolatedfromaccelerated

high temperature testingꢀ This erroneous technique

gives drift numbers that are wildly optimisticꢀ The only

way long-term drift can be determined is to measure it

over the time interval of interestꢀ The LT6654 drift data

was taken on 4ꢀ parts that were soldered into PC boards

similar to a real world application. The boards were then

placed into a constant temperature oven with T = 35°C,

A

their outputs scanned regularly and measured with an 8.5

digit DVM. Long-term drift curves are shown in Figure 8.

Their drift is much smaller after the first thousand hours.

80

40

80

40

0

–40

–80

–40

–80

0

200

400

600

800

1000

1200

1400

1600

1800

TIME (HOURS)

LT6654-2.5 S6 PACKAGE

FIRST THOUSAND HOURS

TIME (HOURS)

LT6654-2.5 S6 PACKAGE

SECOND THOUSAND HOURS

6654 F08a

6654 F08b

(NORMALIZED TO THE FIRST THOUSAND HOURS)

80

40

0

–40

–80

0

500

1000

1500

2000

TIME (HOURS)

LT6654-2.5 LS8 PACKAGE

6654 G38

Figure 8ꢀ LT66ꢁ4-2ꢀꢁ Long Term Drift

6654fh

15

For more information www.linear.com/LT6654

LT6654

applicaTions inForMaTion

Power Dissipation

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

335mW

The power dissipation in the LT6654 is dependent on V ,

IN

load current and the package. The LT6654 package has

a thermal resistance, or θ , of 192°C/W. A curve that

10mA LOAD

JA

illustrates allowed power dissipation versus temperature

for the 6-lead SOT-23 package is shown in Figure 9. The

power dissipation of the LT6654-2.5 as a function of input

voltage is shown in Figure 1ꢀ. The top curve shows power

dissipation with a 1ꢀmA load and the bottom curve shows

power dissipation with no load. When operated within

NO LOAD

10 15 20 25 30 35 40

0

5

its specified limits of V = 36V and sourcing 1ꢀmA, the

V

(V)

IN

6654 F10

LT6654-2.5consumesabout335mWatroomtemperature.

The power-derating curve in Figure 9 shows the LT6654-

2.5 can only safely dissipate 13ꢀmW at 125°C, which is

less than its maximum power output. Care must be taken

when designing the circuit so that the maximum junction

temperature is not exceeded. For best performance, junc-

tion temperature should be kept below 125°C.

Figure 10ꢀ Typical Power Dissipation of the LT66ꢁ4

50

MAX AVG HOT CYCLE MAX AVG COLD CYCLE

25°C TO 125°C TO 25°C 25°C TO –40°C TO 25°C

40

30

20

10

0

The LT6654 includes output current limit circuitry, as well

as thermal limit circuitry, to protect the reference from

damage in the event of excessive power dissipation. The

LT6654 is protected from damage by a thermal shutdown

circuit. However, changes in performance may occur as a

result of operation at high temperature.

–150

–100

–50

0

50

100

150

DISTRIBUTION (ppm)

0.7

T = 150°C

= 192°C/W

6654 F11

θ

JA

0.6

0.5

0.4

0.3

0.2

0.1

0

Figure 11aꢀ LT66ꢁ4 S6 Thermal Hysteresis –40°C to 12ꢁ°C

6

25°C TO –40°C TO 25°C

AND 25°C TO 125°C TO 25°C

5

130mW

4

3

2

1

0

20

40

60

80

100 120 140

TEMPERATURE (°C)

6654 F09

Figure 9ꢀ Maximum Allowed Power Dissipation of the LT66ꢁ4

–40 –30 –20 –10

0

10 20 30 40

DISTRIBUTION (ppm)

6654 F11b

Figure 11bꢀ LT66ꢁ4 LS8 Thermal Hysteresis –40°C to 12ꢁ°C

6654fh

16

For more information www.linear.com/LT6654

LT6654

applicaTions inForMaTion

Hysteresis

Humidity Sensitivity

The hysteresis data is shown in Figure 11. The LT6654 is

capable of dissipating relatively high power. For example,

with a 36V input voltage and 1ꢀmA load current applied

Plastic mould compounds absorb water. With changes in

relative humidity, plastic packaging materials change the

amount of pressure they apply to the die inside, which

can cause slight changes in the output of a voltage refer-

ence, usually on the order of 1ꢀꢀppm. The LS8 package is

hermetic, so it is not affected by humidity, and is therefore

more stable in environments where humidity may be a

concern.

to the LT6654-2.5, the power dissipation is P = 33.5V

D

• 1ꢀmA = 335mW, which causes an increase in the die

temperature of 64°C. This could increase the junction

temperatureabove125°C(T

is15ꢀ°C)andmaycause

JMAX

the output to shift due to thermal hysteresis.

300

PC Board Layout

380s

T

= 260°C

P

RAMP

DOWN

The mechanical stress of soldering a surface mount volt-

age reference to a PC board can cause the output voltage

to shift and temperature coefficient to change. These two

changes are not correlated. For example, the voltage may

shift but the temperature coefficient may not.

T = 217°C

L

225

150

T

= 200°C

S(MAX)

t

P

T

S

= 190°C

30s

T = 150°C

t

L

130s

RAMP TO

150°C

40s

To reduce the effects of stress-related shifts, mount the

reference near the short edge of the PC board or in a

corner. In addition, slots can be cut into the board on two

sides of the device.

75

0

120s

0

2

4

6

8

10

MINUTES

6654 F12

The capacitors should be mounted close to the LT6654.

The GND and V

traces should be as short as possible

OUT

Figure 12ꢀ Lead Free Reflow Profile

tominimizeI•Rdrops, sincehightraceresistancedirectly

impacts load regulation.

14

12

260°C 3 CYCLES

260°C 1 CYCLE

LT6654S6

IR Reflow Shift

The different expansion and contraction rates of the ma-

terials that make up the LT6654 package may cause the

outputvoltagetoshiftafterundergoingIRreflow.Leadfree

solderreflowprofilesreachover25ꢀ°C,considerablymore

than with lead based solder. A typical lead free IR reflow

profile is shown in Figure 12. Similar profiles are found

using a convection reflow oven. LT6654 devices run up

to three times through this reflow process show that the

standard deviation of the output voltage increases with a

slightnegativemeanshiftofꢀ.ꢀꢀ3%asshowninFigure13.

While there can be up to ꢀ.ꢀ14% of output voltage shift,

the overall drift of the LT6654 after IR reflow does not

vary significantly.

10

8

6

4

2

0

–140 –120 –100 –80 –60 –40 –20

CHANGE IN OUTPUT (ppm)

0

6654 F13

Figure 13ꢀ Output Voltage Shift Due to IR Reflow (5)

6654fh

17

For more information www.linear.com/LT6654

LT6654

Typical applicaTions

Extended Supply Range Reference

Boosted Output Current Reference

4.5V < V < 36V

IN

UP TO 160V

330k

4.7µF

220Ω

MMBT5551

2N2905

1µF

IN

LT6654-2.5

BZX84C12

IN

I

OUT

GND

UP TO 300mA

LT6654-2.5 OUT

0.1µF

GND

1µF

6654 TA02

6654 TA03

Boosted Output Current with Current Limit

Octal DAC Reference

4.5V < V < 36V

IN

LT6654-2.5

2.65V < V < 5V

IN

OUT

GND

IN

V

IN

1

2

0.1µF

10µF

LED1*

10Ω

220Ω

4.7µF

0.1µF

V

REF

V

CC

2N2905

CS

DAC A

DAC B

DAC C

DAC D

DAC E

DAC F

DAC G

LT6654-2.5

OUT

GND

SCK

SDI

I

LTC2600

OUT

IN

UP TO 100mA

1µF

CLEAR

6654 TA04

*

LED CANNOT BE OMMITTED

THE LED CLAMPS THE VOLTAGE

DROP ACROSS THE 220Ω AND

LIMITS OUTPUT CURRENT

DAC H

GND

6654 TA05

6654fh

18

For more information www.linear.com/LT6654

LT6654

package DescripTion

Please refer to http://wwwꢀlinearꢀcom/product/LT66ꢁ4#packaging for the most recent package drawingsꢀ

S6 Package

6-Lead Plastic TSOT-23

(Reference LTC DWG # 05-08-1636)

2.90 BSC

(NOTE 4)

0.62

MAX

0.95

REF

1.22 REF

1.4 MIN

1.50 – 1.75

(NOTE 4)

2.80 BSC

3.85 MAX 2.62 REF

PIN ONE ID

RECOMMENDED SOLDER PAD LAYOUT

PER IPC CALCULATOR

0.30 – 0.45

6 PLCS (NOTE 3)

0.95 BSC

0.80 – 0.90

0.20 BSC

DATUM ‘A’

0.01 – 0.10

1.00 MAX

0.30 – 0.50 REF

1.90 BSC

0.09 – 0.20

(NOTE 3)

S6 TSOT-23 0302

NOTE:

1. DIMENSIONS ARE IN MILLIMETERS

2. DRAWING NOT TO SCALE

3. DIMENSIONS ARE INCLUSIVE OF PLATING

4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR

5. MOLD FLASH SHALL NOT EXCEED 0.254mm

6. JEDEC PACKAGE REFERENCE IS MO-193

6654fh

19

For more information www.linear.com/LT6654

LT6654

package DescripTion

Please refer to http://wwwꢀlinearꢀcom/product/LT66ꢁ4#packaging for the most recent package drawingsꢀ

LS8 Package

8-Pin Leadless Chip Carrier (5mm × 5mm)

(Reference LTC DWG # 05-08-1852 Rev B)

8

2.50 0.15

PACKAGE OUTLINE

7

1

0.5

2

3

6

2.54 0.15

1.4

1.50 0.15

XYY ZZ

ABCDEF

4

Q12345

0.70 0.05 × 8

COMPONENT

PIN “A1”

5.00 SQ 0.15

5.80 SQ 0.15

TRAY PIN 1

BEVEL

APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED

PACKAGE IN TRAY LOADING ORIENTATION

5.00 SQ 0.15

4.20 SQ 0.10

8

1.45 0.10

0.95 0.10

5.00 SQ 0.15

8

R0.20 REF

2.00 REF

PIN 1

1

2

1

2

7

6

7

6

TOP MARK

(SEE NOTE 5)

0.5

2.54 0.15

4.20 0.10

1.4

5

3

5

R0.20 REF

1.00 × 7 TYP

LS8 0113 REV B

4

0.70 TYP

0.10 TYP

0.64 × 8 TYP

NOTE:

1. ALL DIMENSIONS ARE IN MILLIMETERS

2. DRAWING NOT TO SCALE

3. DIMENSIONS PACKAGE DO NOT INCLUDE PLATING BURRS

PLATING BURRS, IF PRESENT, SHALL NOT EXCEED 0.30mm ON ANY SIDE

4. PLATING—ELECTO NICKEL MIN 1.25UM, ELECTRO GOLD MIN 0.30UM

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

TOP AND BOTTOM OF PACKAGE

6654fh

20

For more information www.linear.com/LT6654

LT6654

revision hisTory

REV

DATE

DESCRIPTION

PAGE NUMBER

A

12/1ꢀ Added voltage options (1.25ꢀV, 2.ꢀ48V, 3.ꢀꢀꢀV, 4.ꢀ96V, 5.ꢀꢀꢀV) reflected throughout the data sheet.

1-18

4

B

3/11

8/12

Revised conditions for Output Voltage Noise in the Electrical Characteristics section.

C

Addition of LS8 Features and Order Information.

1, 2, 4

Update to Electrical Characteristics to Include LS8 Package.

Addition of Long Term Drift and Hysteresis Plots for LS8 Package.

Addition of Humidity Sensitivity Information.

6

9, 15, 16

17

Addition of LS8 Package Description.

2ꢀ

Addition of Related Parts.

22

1, 13, 14, 18

2, 11, 12

11

D

2/14

6/15

Schematics updated to refer to pin functions instead of pin numbers.

Label of Pin 2 on LS8 package changed to NC.

The pin descriptions of Pin 2, Pin 3 and Pin 4 on LS8 package changed.

GND label added on all schematic references of LT6654.

SOT-23 removed from data sheet title.

18, 22

1

E

F

Order Information updated to include 2.ꢀ48V, 4.ꢀ96V and 5V option in LS8 package.

3, 4

12/15 Part marking correction for 4.ꢀ96V options in TSOT-23 package.

Web link to Package Description updated.

3

19, 2ꢀ

2-5

G

H

ꢀ3/17 Added 2.5V option in I-temp grade.

ꢀ5/17 Added 1.25V, 2.ꢀ48V, 3V, 3.3V, 4.ꢀ96V and 5V Option in I-temp grade.

2-5

6654fh

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 interconnecti of it ci it as cribe inei ll ot inLTfrin on existing patent rights.

21

Foornmorse irncfuorsmadtieosn wwdwh.elr enawr.iconm/ 66g5e4

LT6654

Typical applicaTion

16-Bit ADC Reference

4.6V < V < 36V

S

LT6654-4.096

IN OUT

GND

10µF

0.1µF

V

CC

REF

SDO

SDI

CS

+

IN+

IN–

–2.048V < V

< 2.048V

LTC2480

TO MCU

DIFFERENTIAL

–

SCK

f

GND

O

6654 TA06

relaTeD parTs

PART NUMBER DESCRIPTION

COMMENTS

LT146ꢀ

Micropower Series Reference

ꢀ.ꢀ75% Max, 1ꢀppm/°C Max Drift, 2.5V, 5V and 1ꢀV Versions, MSOP, PDIP, Sꢀ-8,

SOT-23 and TO-92 Packages

LT1461

LT179ꢀ

LT665ꢀ

LTC6652

Micropower Precision LDO Series Reference 3ppm/°C Max Drift, ꢀ°C to 7ꢀ°C, –4ꢀ°C to 85°C, –4ꢀ°C to 125°C Options in SO-8

Micropower Precision Series References

Micropower Reference with Buffer Amplifier

ꢀ.ꢀ5% Max, 1ꢀppm/°C Max, 6ꢀµA Supply, SOT-23 Package

ꢀ.ꢀ5% Max, 5.6µA Supply, SOT-23 Package

Precision Low Drift Low Noise Buffered

Reference

ꢀ.5% Max, 5ppm/°C Max, 2.1ppm Noise (ꢀ.1Hz to 1ꢀHz) 1ꢀꢀ% Tested at –4ꢀ°C,

P-P

25°C and 125°C

LT666ꢀ

LTC6655

LT6656

Tiny Micropower Series Reference

Precision Low Noise Reference

8ꢀꢀnA Precision Voltage Reference

ꢀ.2% Max, 2ꢀppm/°C Max, 2ꢀmA Output Current, 2mm × 2mm DFN

2ppm/°C Max, 65ꢀnV Noise (ꢀ.1Hz to 1ꢀHz) 1ꢀꢀ% Tested at –4ꢀ°C, 25°C and 125°C

P-P

8ꢀꢀnA, 1ꢀppm/°C Max, ꢀ.ꢀ5% Max, SOT-23 Package

6654fh

LT 0517 REV H • PRINTED IN USA

www.linear.com/LT6654

22

 LINEAR TECHNOLOGY CORPORATION 2010

For more information www.linear.com/LT6654


型号：	LT6654AHLS8-4.096#PBF
厂家：	Linear
描述：	暂无描述
文件：	总22页 (文件大小：987K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT6654AHLS8-4.096#PBF [Linear]

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