ANALOG DEVICES LT 6654AHS6-2.5 Datasheet

LT6654

SOT-23 Precision Wide

Supply High Output Drive

Low Noise Reference

FEATURES

n

Low Drift:

A Grade: 10ppm/°C Max
B Grade: 20ppm/°C Max

n

High Accuracy:

A Grade: ±0.05% Max
B Grade: ±0.10% Max

n

Low Noise: 1.6ppm

n

Wide Supply Range to 36V

n

Low Thermal Hysteresis

n

Line Regulation (Up to 36V): 5ppm/V Max

n

Low Dropout Voltage: 100mV Max

n

Sinks and Sources ±10mA

n

Load Regulation at 10mA: 8ppm/mA Max

n

Easily Confi gured for Negative Voltage Output

n

Fully Specifi ed from –55°C to 125°C

n

Available Output Voltage Options: 1.25V, 2.048V, 2.5V,

(0.1Hz to 10Hz)

P-P

3V, 3.3V, 4.096V, 5V

n

Low Profi le (1mm) ThinSOT™ Package

APPLICATIONS

n

Automotive Control and Monitoring

n

High Temperature Industrial

n

High Resolution Data Acquisition Systems

n

Instrumentation and Process Control

n

Precision Regulators

n

Medical Equipment

DESCRIPTION

The LT®6654 is a family of small precision voltage ref­erences that offers high accuracy, low noise, low drift,
low dropout and low power. The LT6654 operates from
voltages up to 36V and is fully specifi ed from –55°C to
125°C. A buffered output ensures ±10mA 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.

The LT6654 was designed with advanced manufactur­ing techniques and curvature compensation to provide
10ppm/°C temperature drift and 0.05% initial accuracy.
Low thermal hysteresis ensures high accuracy and

1.6ppm
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.

The LT6654 is offered in a 6-lead SOT-23 package.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.

noise minimizes measurement uncertainty.

P-P

TYPICAL APPLICATION

Basic Connection

+ 0.5V) < VIN < 36V

(V

OUT

46

C

IN

0.1µF

LT6654

12

CL
1µF

V

OUT

6654 TA01a

Output Voltage Temperature Drift

0.10
3 TYPICAL PARTS

LT6654-2.5

0.05

0.00

ACCURACY (%)

OUT

V

–0.05

–0.10

–60

TEMPERATURE (°C)

60

40200–40 –20

120

100

6654 TA01b

140

6654fa

80

1

LT6654

PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS

(Note 1)

Input Voltage VIN to GND ........................... –0.3V to 38V

Output Voltage V

.........................–0.3V to V

OUT

+ 0.3V

IN

Output Short-Circuit Duration ......................... Indefi nite

Specifi ed Temperature Range

H-Grade ............................................. –40°C to 125°C

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

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

Storage Temperature Range (Note 2) ..... –65°C to 150°C

GND*

GND
DNC

*CONNECT PIN TO DEVICE GND (PIN 2)

TOP VIEW

1
2
3

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

T

= 150°C, θJA = 192°C/W

JMAX

DNC: DO NOT CONNECT

6

V

OUT

5

DNC

4

V

IN

Lead Temperature (Soldering, 10 sec.)

(Note 9) ................................................................. 300°C

ORDER INFORMATION

Lead Free Finish

TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE

LT6654AHS6-1.25#TRMPBF LT6654AHS6-1.25#TRPBF LTFVD 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-1.25#TRMPBF LT6654BHS6-1.25#TRPBF LTFVD 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-1.25#TRMPBF LT6654AMPS6-1.25#TRPBF LTFVD 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-1.25#TRMPBF LT6654BMPS6-1.25#TRPBF LTFVD 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654AHS6-2.048#TRMPBF LT6654AHS6-2.048#TRPBF LTFVF 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-2.048#TRMPBF LT6654BHS6-2.048#TRPBF LTFVF 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-2.048#TRMPBF LT6654AMPS6-2.048#TRPBF LTFVF 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-2.048#TRMPBF LT6654BMPS6-2.048#TRPBF LTFVF 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654AHS6-2.5#TRMPBF LT6654AHS6-2.5#TRPBF LTFJY 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-2.5#TRMPBF LT6654BHS6-2.5#TRPBF LTFJY 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-2.5#TRMPBF LT6654AMPS6-2.5#TRPBF LTFJY 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-2.5#TRMPBF LT6654BMPS6-2.5#TRPBF LTFJY 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654AHS6-3#TRMPBF LT6654AHS6-3#TRPBF LTFVG 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-3#TRMPBF LT6654BHS6-3#TRPBF LTFVG 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-3#TRMPBF LT6654AMPS6-3#TRPBF LTFVG 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-3#TRMPBF LT6654BMPS6-3#TRPBF LTFVG 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654AHS6-3.3#TRMPBF LT6654AHS6-3.3#TRPBF LTFVH 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-3.3#TRMPBF LT6654BHS6-3.3#TRPBF LTFVH 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-3.3#TRMPBF LT6654AMPS6-3.3#TRPBF LTFVH 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-3.3#TRMPBF LT6654BMPS6-3.3#TRPBF LTFVH 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654AHS6-4.096#TRMPBF LT6654AHS6-4.096#TRPBF LTFVJ 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-4.096#TRMPBF LT6654BHS6-4.096#TRPBF LTFVJ 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-4.096#TRMPBF LT6654AMPS6-4.096#TRPBF LTFVJ 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-4.096#TRMPBF LT6654BMPS6-4.096#TRPBF LTFVJ 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654AHS6-5#TRMPBF LT6654AHS6-5#TRPBF LTFVK 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654BHS6-5#TRMPBF LT6654BHS6-5#TRPBF LTFVK 6-Lead Plastic TSOT-23 –40°C to 125°C
LT6654AMPS6-5#TRMPBF LT6654AMPS6-5#TRPBF LTFVK 6-Lead Plastic TSOT-23 –55°C to 125°C
LT6654BMPS6-5#TRMPBF LT6654BMPS6-5#TRPBF LTFVK 6-Lead Plastic TSOT-23 –55°C to 125°C
TRM = 500 pieces. *Temperature grades are identifi ed by a label on the shipping container.
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.

Consult LTC Marketing for information on lead based fi nish parts.
For more information on lead free part marking, go to:

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

http://www.linear.com/leadfree/

6654fa

2

LT6654

AVAILABLE OPTIONS

OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT ORDER PART NUMBER** SPECIFIED TEMPERATURE RANGE

1.25V 0.05%

0.1%

0.05%

0.1%

2.048V 0.05%

0.1%

0.05%

0.1%

2.5V 0.05%

0.1%

0.05%

0.1%

3V 0.05%

0.1%

0.05%

0.1%

3.3V 0.05%

0.1%

0.05%

0.1%

4.096V 0.05%

0.1%

0.05%

0.1%

5V 0.05%

0.1%

0.05%

0.1%

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

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

10ppm/°C
20ppm/°C
10ppm/°C
20ppm/°C

LT6654AHS6-1.25

LT6654BHS6-1.25
LT6654AMPS6-1.25
LT6654BMPS6-1.25

LT6654AHS6-2.048

LT6654BHS6-2.048
LT6654AMPS6-2.048
LT6654BMPS6-2.048

LT6654AHS6-2.5

LT6654BHS6-2.5
LT6654AMPS6-2.5
LT6654BMPS6-2.5

LT6654AHS6-3

LT6654BHS6-3
LT6654AMPS6-3
LT6654BMPS6-3

LT6654AHS6-3.3
LT6654BHS6-3.3

LT6654AMPS6-3.3
LT6654BMPS6-3.3

LT6654AHS6-4.096

LT6654BHS6-4.096
LT6654AMPS6-4.096
LT6654BMPS6-4.096

LT6654AHS6-5

LT6654BHS6-5
LT6654AMPS6-5
LT6654BMPS6-5

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C, CL = 1μF and VIN = V

+ 0.5V, unless otherwise noted.

OUT

For LT6654-1.25, VIN = 2.4V, unless otherwise noted.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Output Voltage Accuracy LT6654A

Output Voltage Temperature Coeffi cient (Note 3) LT6654A

Line Regulation V

Load Regulation (Note 4) I

LT6654B
LT6654AH
LT6654BH
LT6654AMP
LT6654BMP

LT6654B

+ 0.5V ≤ VIN ≤ 36V

OUT

LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5

2.4V ≤ V
LT6654-1.25

OUT(SOURCE)

LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
LT6654-1.25

≤ 36V

IN

= 10mA

–0.05
–0.10

l

–0.215

l

–0.43

l

–0.23

l

–0.46

l
l

l

l

l

l

3

10

1.2 5

1.2 5

3

6

0.05

0.10

0.215

0.43

0.23

0.46
10

20

10

10

8
15
15
20

ppm/°C
ppm/°C

ppm/V
ppm/V

ppm/V
ppm/V

ppm/mA
ppm/mA
ppm/mA
ppm/mA

6654fa

%
%
%
%
%
%

3

LT6654

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T

= 25°C, CL = 1μF and VIN = V

A

For LT6654-1.25, VIN = 2.4V, unless otherwise noted.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Load Regulation (Note 4) I

LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
LT6654-1.25

Dropout Voltage (Note 5) V

I
LT6654-2.048, LT6654-2.5, LT6654-3,
LT6654-3.3, LT6654-4.096, LT6654-5
I
I

Minimum Input Voltage LT6654-1.25, ∆V

LT6654-1.25, ∆V

Supply Current No Load

Output Short-Circuit Current Short V

Short V

Output Voltage Noise (Note 6) 0.1Hz ≤ f ≤ 10Hz

LT6654-1.25
LT6654-2.048
LT6645-2.5
LT6645-3
LT6645-3.3
LT6645-4
LT6645-5

10Hz ≤ f ≤ 1kHz
Turn-On Time 0.1% Settling, C
Long-Term Drift of Output Voltage (Note 7) 60 ppm/√kHr
Hysteresis (Note 8) ∆T = 0°C to 70°C

∆T = –40°C to 85°C

∆T = –40°C to 125°C

∆T = –55°C to 125°C

OUT(SINK)

– V

IN

OUT

OUT

OUT(SOURCE)
OUT(SINK)

OUT
OUT

= 10mA

, ∆V

= 0mA

to GND
to V

= 0.1%

OUT

= 10mA

= –10mA

= 0.1%, I

OUT

= 0.1%, I

OUT

IN

= 1µF 150 µs

LOAD

= 0mA

OUT

= ±10mA

OUT

+ 0.5V, unless otherwise noted.

OUT

9

l

15

l

55 100

l

l
l

1.5 1.6

l
l

350

l

40
30

0.8

1.0

1.5

1.6

1.7

2.0

2.2

2.0

30
40
90

100

20
30
25
30

120

450

50

1.8

2.4

600

ppm/mA
ppm/mA
ppm/mA
ppm/mA

mV
mV

mV
mV

µA
µA

mA
mA

ppm

P-P

ppm

P-P

ppm

P-P

ppm

P-P

ppm

P-P

ppm

P-P

ppm

P-P

ppm

RMS

ppm
ppm
ppm
ppm

V
V
V

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 specifi ed temperature range,
the output may shift due to hysteresis.

Note 3: Temperature coeffi cient is measured by dividing the maximum
change in output voltage by the specifi ed temperature range.

Note 4: Load regulation is measured on a pulse basis from no load to the
specifi ed load current. Output changes due to die temperature change
must be taken into account separately.

Note 5: Excludes load regulation errors.
Note 6: Peak-to-peak noise is measured with a 1-pole highpass fi lter at

0.1Hz and 2-pole lowpass fi lter at 10Hz. The unit is enclosed in a still-air
environment to eliminate thermocouple effects on the leads. The test
time is 10 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.

4

Note 7: Long-term stability typically has a logarithmic characteristic
and therefore, changes after 1000 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 fi rst 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 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 20 or 30 degrees of
operational temperature), it’s usually not a dominant error source.

Note 9: The stated temperature is typical for soldering of the leads during
manual rework. For detailed IR refl ow recommendations, refer to the
Applications Information section.

6654fa

LT6654

The characteristic curves are similar across the

TYPICAL PERFORMANCE CHARACTERISTICS

LT6654 family. Curves from the LT6654-1.25, LT6654-2.5 and the LT6654-5 represent the full range of typical performance of all
voltage options. Characteristic curves for other output voltages fall between these curves and can be estimated based on their output.

1.25V Output Voltage
Temperature Drift 1.25V Turn-On Characteristics

1.2520
THREE TYPICAL PARTS

1.2515

1.2510

1.2505

1.2500

1.2495

REFERENCE VOLTAGE (V)

1.2490

1.2485

–60

–40 –20 0

20 40 60 80 140100 120

TEMPERATURE (°C)

6654 G01

V

1V/DIV

GND

V

OUT

0.5V/DIV

GND

IN

C

LOAD

= 1µF

20µs/DIV

6654 G02

1.25V Output Impedance
vs Frequency

100

10

1

0.1

OUTPUT IMPEDANCE (Ω)

0.01

0.1

1 10 100

FREQUENCY (kHz)

1.25V Load Regulation (Sourcing) 1.25V Load Regulation (Sinking) 1.25V Output Noise 0.1Hz to 10Hz

30

20

10

0

–10

–20

–30

OUTPUT VOLTAGE CHANGE (ppm)

–40

–50

0.1

–55°C

125°C

1

OUTPUT CURRENT (mA)

–40°C

25°C

10

6654 G04

200

180

160

140

120

100

80

60

40

OUTPUT VOLTAGE CHANGE (ppm)

20

0

0.1

25°C

–55°C

1

OUTPUT CURRENT (mA)

125°C

OUTPUT NOISE (1µV/DIV)

–40°C

10

TIME (1s/DIV)

6654 G05

CL = 1µF

CL = 10µF

1000

6654 G03

109876543210

6654 G06

1.25V Minimum Input Voltage
(Sourcing)

10

125°C

25°C

1

OUTPUT CURRENT (mA)

0.1
1 1.2 1.4 1.6 1.8 2 2.2

MINIMUM INPUT VOLTAGE (V)

–55°C

–40°C

6654 G07

2.4

1.25V Minimum Input Voltage
(Sinking)

10

125°C

1

OUTPUT CURRENT (mA)

0.1
1 1.1 1.2 1.3 1.4 1.5 1.6 1.7

MINIMUM INPUT VOLTAGE (V)

25°C

–40°C

–55°C

6654 G08

1.8

1.2V Output Voltage Noise
Spectrum

400

350

300

250

200

150

NOISE VOLTAGE (nV√Hz)

100

50

0

0.01 0.1 1 10
FREQUENCY (kHz)

IO = 0µA

IO = 5mA

100

6654 G09

6654fa

5

LT6654

The characteristic curves are similar across the

TYPICAL PERFORMANCE CHARACTERISTICS

LT6654 family. Curves from the LT6654-1.25, LT6654-2.5 and the LT6654-5 represent the full range of typical performance of all
voltage options. Characteristic curves for other output voltages fall between these curves and can be estimated based on their output.

2.5V Output Voltage
Temperature Drift

2.502
THREE TYPICAL PARTS

2.501

2.500

OUTPUT VOLTAGE (V)

2.499

2.498

–60 –20 20 60 140100

TEMPERATURE (°C)

6654 G10

2.5V Supply Current
vs Input Voltage 2.5V Line Regulation

600

500

400

300

200

INPUT CURRENT (µA)

100

0

0 5 10 15 20 25 30 35

–55°C

25°C

125°C

INPUT VOLTAGE (V)

–40°C

6654 G11

2.5050

2.5040

2.5030

2.5020

2.5010

2.5000

2.4990

2.4980

OUTPUT VOLTAGE (V)

2.4970

2.4960

2.4950

40

0 5 10 15 20 25 30 35

25°C

125°C

–55°C

INPUT VOLTAGE (V)

2.5V Load Regulation (Sourcing) 2.5V Load Regulation (Sinking) 2.5V Output Noise 0.1Hz to 10Hz

10

0

–10

–20

–30

OUTPUT VOLTAGE CHANGE (ppm)

–40

0.1 1

–40°C

125°C

OUTPUT CURRENT (mA)

–55°C

25°C

10

6654 G13

180

160

140

120

100

80

60

40

OUTPUT VOLTAGE CHANGE (ppm)

20

0

0.1 1

25°C

–40°C

OUTPUT CURRENT (mA)

125°C

–55°C

6654 G14

OUTPUT NOISE (1µV/DIV)

10

TIME (1s/DIV)

–40°C

40

6654 G12

6654 G15

2.5V Minimum V
Differential (Sourcing)

10

–55°C

–40°C

1

OUTPUT CURRENT (mA)

0.1
0 200 300

INPUT-OUTPUT VOLTAGE (mV)

6

to V

IN

25°C

125°C

15010050 250

OUT

400

350

6654 G16

2.5V Minimum VIN to V
Differential (Sinking)

10

125°C

1

OUTPUT CURRENT (mA)

0.1
–300 –100 0

INPUT-OUTPUT VOLTAGE (mV)

25°C

–150–200–250 –50

OUT

–40°C

–55°C

50

6654 G17

100

2.5V Output Voltage Noise
Spectrum

400

350

300

250

200

150

NOISE VOLTAGE (nV√Hz)

100

50

0

0.01 0.1 1 10
FREQUENCY (kHz)

IO = 0µA

IO = 5mA

100

6654 G18

6654fa