ANALOG DEVICES LTC 6652 BHMS Datasheet

LTC6652

V

ACCURACY (%)

0.050

Precision Low Drift Low

Noise Buffered Reference

Features

n

Low Drift:

A-Grade 5ppm/°C Max
B-Grade 10ppm/°C Max (MSOP8)
B-Grade 8ppm/°C Max (LS8)

n

High Accuracy:

A Grade ±0.05% Max
B-Grade ±0.1% Max

n

Low Noise: 2.1ppm

n

100% Tested at – 40°C, 25°C and 125°C

n

Sinks and Sources Current: ±5mA

n

Low Power Shutdown: <2µA Maximum

n

Thermal Hysteresis (LS8): 45ppm (–40°C to 125°C)

n

Long-Term Drift (LS8): 20ppm/√kHr

n

Low Dropout: 300mV

n

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

(0.1Hz to 10Hz)

P-P

3V, 3.3V, 4.096V, 5V

n

8-Lead MSOP and 5mm × 5mm Surface Mount

Hermetic Packages

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 LTC®6652 family of precision, low drift, low noise
references is fully specified over the temperature range
of –40°C to 125°C. High order curvature compensation
allows these references to achieve a low drift of less than
5ppm/°C with a predictable temperature characteristic and
an output voltage accuracy of ±0.05%. The performance
over temperature should appeal to automotive, high perfor­mance industrial and other high temperature applications.

The LTC6652 voltage references can be powered from
supply voltages up to 13.2V. They boast low noise, ex­cellent load regulation, source and sink capability and
exceptional line rejection, making them a superior choice
for demanding precision applications. A shutdown mode
allows power consumption to be reduced when the refer­ence is not needed. The optional output capacitor can be
left off when space constraints are critical.

The LTC6652 references are offered in an 8-lead MSOP
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 of Linear
Technology Corporation. All other trademarks are the property of their respective owners.

typical application

Basic Connection

V

2.8V ≤ VIN ≤ 13.2V

0.1µF

(OPTIONAL)

C

IN

IN

SHDN

LTC6652-2.5

GND

Output Voltage Temperature Drift

0.025

V

C

OUT

1µF
(OPTIONAL)

6652 TA01a

OUT

2.5V

OUT

–0.025

–0.050

0

–20 0 20 40

–40

TEMPERATURE (°C)

60 80 100 125

6652 TA01b

6652fe

1

V

OUT

For more information www.linear.com/6652

LTC6652

absolute MaxiMuM ratings

(Note 1)

Input Voltage

V

to GND ..........................................–0.3V to 13.2V

IN

SHDN to GND ............................–0.3V to (V

+ 0.3V)

IN

Output Voltage

V

...........................................–0.3V to (V

OUT

+ 0.3V)

IN

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

pin conFiguration

TOP VIEW

1

DNC

2

V

IN

3

SHDN

4

GND

MS8 PACKAGE

8-LEAD PLASTIC MSOP

= 150°C, θJA = 200°C/W

T

JMAX

DNC: DO NOT CONNECT

*CONNECT THE PINS TO DEVICE GND (PIN 4)

8
7
6
5

GND*
GND*
V

OUT

GND*

Operating Temperature Range ................ –40°C to 125°C

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

Lead Temperature Range (Soldering, 10 sec)

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

TOP VIEW

GND*

8

1

DNC

2

V

IN

SHDN

3

GND

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

*CONNECT THE PINS TO DEVICE GND (PIN 4)

LS8 PACKAGE

= 150°C, θJA = 120°C/W

T

JMAX

DNC: DO NOT CONNECT

7

GND*

6

V

OUT

GND*

5

4

orDer inForMation

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE

LTC6652AHMS8-1.25#PBF LTC6652AHMS8-1.25#TRPBF LTCVH 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-1.25#PBF LTC6652BHMS8-1.25#TRPBF LTCVH 8-Lead Plastic MSOP –40°C to 125°C
LTC6652AHMS8-2.048#PBF LTC6652AHMS8-2.048#TRPBF LTCVJ 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-2.048#PBF LTC6652BHMS8-2.048#TRPBF LTCVJ 8-Lead Plastic MSOP –40°C to 125°C
LTC6652AHMS8-2.5#PBF LTC6652AHMS8-2.5#TRPBF LTCQV 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-2.5#PBF LTC6652BHMS8-2.5#TRPBF LTCQV 8-Lead Plastic MSOP –40°C to 125°C
LTC6652AHMS8-3#PBF LTC6652AHMS8-3#TRPBF LTCVK 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-3#PBF LTC6652BHMS8-3#TRPBF LTCVK 8-Lead Plastic MSOP –40°C to 125°C
LTC6652AHMS8-3.3#PBF LTC6652AHMS8-3.3#TRPBF LTCVM 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-3.3#PBF LTC6652BHMS8-3.3#TRPBF LTCVM 8-Lead Plastic MSOP –40°C to 125°C
LTC6652AHMS8-4.096#PBF LTC6652AHMS8-4.096#TRPBF LTCVN 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-4.096#PBF LTC6652BHMS8-4.096#TRPBF LTCVN 8-Lead Plastic MSOP –40°C to 125°C
LTC6652AHMS8-5#PBF LTC6652AHMS8-5#TRPBF LTCVP 8-Lead Plastic MSOP –40°C to 125°C
LTC6652BHMS8-5#PBF LTC6652BHMS8-5#TRPBF LTCVP 8-Lead Plastic MSOP –40°C to 125°C

2

6652fe

For more information www.linear.com/6652

LTC6652

orDer inForMation

LEAD FREE FINISH PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE

†

LTC6652AHLS8-2.5#PBF
LTC6652BHLS8-2.5#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/

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

†

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

665225 8-Lead Ceramic LCC 5mm × 5mm –40°C to 125°C

†

665225 8-Lead Ceramic LCC 5mm × 5mm –40°C to 125°C

available options

OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT PART NUMBER**

1.250 0.05%

0.1%

2.048 0.05%

0.1%

2.500 0.05%

0.1%

0.05%

0.1%

3.000 0.05%

0.1%

3.300 0.05%

0.1%

4.096 0.05%

0.1%

5.000 0.05%

0.1%

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

5ppm/°C

10ppm/°C

5ppm/°C

10ppm/°C

5ppm/°C

10ppm/°C

5ppm/°C
8ppm/°C

5ppm/°C

10ppm/°C

5ppm/°C

10ppm/°C

5ppm/°C

10ppm/°C

5ppm/°C

10ppm/°C

LTC6652AHMS8-1.25
LTC6652BHMS8-1.25

LTC6652AHMS8-2.048
LTC6652BHMS8-2.048

LTC6652AHMS8-2.5
LTC6652BHMS8-2.5
LTC6652AHLS8-2.5
LTC6652BHLS8-2.5

LTC6652AHMS8-3
LTC6652BHMS8-3

LTC6652AHMS8-3.3
LTC6652BHMS8-3.3

LTC6652AHMS8-4.096
LTC6652BHMS8-4.096

LTC6652AHMS8-5
LTC6652BHMS8-5

electrical characteristics

The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = V

PARAMETER CONDITIONS MIN TYP MAX UNITS

Output Voltage LTC6652A

Output Voltage Temperature Coefficient
(Note 3)

Line Regulation V

Load Regulation (Note 4) I

LTC6652B
LTC6652A

LTC6652BMS8
LTC6652BLS8

+ 0.5V ≤ VIN ≤ 13.2V, SHDN = V

OUT

= 5mA, LTC6652-1.25, LTC6652-2.048,

SOURCE

LTC6652-2.5, LTC6652-3, LTC6652-3.3,
LTC6652-4.096, LTC6652-5

= 1mA, LTC6652-1.25, LTC6652-2.048

I

SINK

= 5mA, LTC6652-2.5, LTC6652-3,

I

SINK

LTC6652-3.3, LTC6652-4.096, LTC6652-5

For more information www.linear.com/6652

+ 0.5V, unless otherwise noted.

OUT

–0.05

–0.1

l

l

IN

l

l

l

l

2

0.05

0.1

4
4

2 50

20 75

80 250

50 150

5

10

8

80

200

600

450

ppm/°C
ppm/°C
ppm/°C

ppm/V
ppm/V

ppm/mA
ppm/mA

ppm/mA
ppm/mA

ppm/mA
ppm/mA

6652fe

3

%
%

LTC6652

electrical characteristics

The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = V

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Operating Voltage (Note 5) I

Output Short-Circuit Current Short V

Shutdown Pin (SHDN) Logic High Input Voltage

Supply Current No Load

Shutdown Current SHDN Tied to GND
Output Voltage Noise (Note 6) 0.1Hz ≤ f ≤ 10Hz

Turn-On Time 0.1% Settling, C
Long-Term Drift of Output Voltage (Note 7) LTC6652MS8

Hysteresis (Note 8) ∆T = –40°C to 125°C, LTC6652MS8

= 5mA, V

SOURCE

LTC6652-1.25, LTC6652-2.048
LTC6652-2.5, LTC6652-3, LTC6652-3.3,
LTC6652-4.096, LTC6652-5

to GND

OUT
OUT

to V

Short V

Logic High Input Current
Logic Low Input Voltage

Logic Low Input Current

LTC6652-1.25
LTC6652-2.048, LTC6652-2.5, LTC6652-3
LTC6652-3.3
LTC6652-4.096
LTC6652-5
10Hz ≤ f ≤ 1kHz

LTC6652LS8

∆T = –40°C to 85°C, LTC6652MS8
∆T = 0°C to 70°C, LTC6652MS8
∆T = –40°C to 125°C, LTC6652LS8
∆T = –40°C to 85°C, LTC6652LS8
∆T = 0°C to 70°C, LTC6652LS8

Error ≤ 0.1%

OUT

IN

= 0 100 µs

LOAD

+ 0.5V, unless otherwise noted.

OUT

l
l

l
l

l
l

l

l

2.7
+ 0.3V

V

OUT

2

16
16

0.1

0.1

350

0.1 2 µA

2.4

2.1

2.2

2.3

2.8
3

60
20

80
75
45
45
25
10

1

0.8
1

560

mA
mA

ppm
ppm
ppm
ppm
ppm

ppm

RMS

ppm/√kHr
ppm/√kHr

ppm
ppm
ppm
ppm
ppm
ppm

µA

µA
µA

µA

P-P
P-P
P-P
P-P
P-P

V
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 specified temperature range,
the output may shift due to hysteresis.

Note 3: Temperature coefficient is measured by dividing the maximum
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 5: Excludes load regulation errors.
Note 6: Peak-to-peak noise is measured with a 3-pole highpass at 0.1Hz

and 4-pole lowpass filter 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.

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 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 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
is roughly proportional to the square of the temperature change. 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.
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.

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

6652fe

4

For more information www.linear.com/6652

LTC6652

NOISE VOLTAGE (nV/√Hz)

OUTPUT NOISE (1µV/DIV)

OUTPUT VOLTAGE (V)

REFERENCE VOLTAGE (V)

1.2510

OUTPUT VOLTAGE CHANGE (ppm)

OUTPUT VOLTAGE CHANGE (ppm)

typical perForMance characteristics

Characteristic curves are similar for most
LTC6652s. Curves from the LTC6652-1.25, LTC6652-2.5 and the LTC6652-5 represent the extremes and typical of the 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

1.2505

1.2500

1.2495

1.2490
–80

–40 0

40 160

TEMPERATURE (°C)

1.25V Load Regulation (Sinking)

400

350

300

250

200

150

100

50

0

0.1
OUTPUT CURRENT (mA)

–40°C

1 10

3 TYPICAL PARTS

80

120

6652 G17

125°C

25°C

6652 G20

1.25V Line Regulation

1.2506

1.2504

1.2502

1.2500

1.2498

1.2496

1.2494
0

2 4

6 10

INPUT VOLTAGE (V)

1.25V Low Frequency 0.1Hz to
10Hz Transient Noise

TIME (1 SECOND/DIV)

125°C

25°C

–40°C

8 12 14

6652 G18

6652 G21

1.25V Load Regulation (Sourcing)

0

–50

–100

–150

–200

–250

0.1
OUTPUT CURRENT (mA)

125°C

1

1.25V Output Voltage Noise
Spectrum

400

300

200

100

0

0.01

0.1 1 10
FREQUENCY (kHz)

–40°C

25°C

10

6652 G19

6652 G22

I

OUT

500mV/DIV

1.25 Sinking Current Without
Output Capacitor

1mA

0mA

V

OUT

C

= 0µF

OUT

500µs/DIV

6652 G23

1.25 Sinking Current with Output
Capacitor

1mA

I

OUT

0mA

V

OUT

500mV/DIV

C

= 1µF

OUT

For more information www.linear.com/6652

500µs/DIV

6652 G24

1.25V Stability with Output
Capacitance

10µF

1µF

0.1µF

10nF

1nF

OUTPUT CAPACITOR

100pF

NO CAP

–5 –1 0 5

LOAD CURRENT (mA)

REGION OF
MARGINAL

STABILITY

6652 G16

6652fe

5

LTC6652

typical perForMance characteristics

Characteristic curves are similar for most
LTC6652s. Curves from the LTC6652-1.25, LTC6652-2.5 and the LTC6652-5 represent the extremes and typical of the 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

2.5010

2.5005

2.5000

2.4995

REFERENCE VOLTAGE (V)

2.4990

2.4985
–50

–25 0

50

25 75 150

TEMPERATURE (°C)

2.5V Load Regulation (Sinking)

700

600

500

400

200

100

OUTPUT VOLTAGE CHANGE (ppm)

0

0.1
OUTPUT CURRENT (mA)

1 10

3 TYPICAL PARTS

100 125

125°C

25°C

–40°C

6652 G01

6652 G04

2.5V Line Regulation

2.5010

2.5005

2.5000

2.4995

2.4990

OUTPUT VOLTAGE (V)

2.4985

2.4980
0

2 4

2.5V Supply Current
vs Input Voltage

1000

900

800

700

600

500

400

300

SUPPLY CURRENT (µA)

200

100

0

0

2

8 12 14

6 10

INPUT VOLTAGE (V)

125°C

25°C

–40°C

8

6

4

INPUT VOLTAGE (V)

125°C

25°C

–40°C

10

12

6652 G02

6652 G05

14

2.5V Load Regulation (Sourcing)

0

–20

–40

–60

–80

–100

–120

–140

–160

OUTPUT VOLTAGE CHANGE (ppm)

–180

–200

0.1
OUTPUT CURRENT (mA)

1

2.5V Shutdown Current
vs Input Voltage

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

SUPPLY CURRENT (µA)

0.2

0.1

0

0

2

125°C

25°C

–40°C

8

6

4

INPUT VOLTAGE (V)

125°C

10

–40°C

25°C

12

10

6652 G03

14

6652 G06

6

2.5V Minimum V
Differential (Sourcing)

10

1

25°C

0.1

OUTPUT CURRENT (mA)

0.01

0.001

125°C, –40°C

0.01 0.1 1

INPUT-OUTPUT VOLTAGE (V)

IN-VOUT

6652 G09

For more information www.linear.com/6652

2.5V Minimum V
Differential (Sinking)

10

1

OUTPUT CURRENT (mA)

0.1

0.001

25°C

125°C

0.01 0.1 1

OUTPUT-INPUT VOLTAGE (V)

OUT-VIN

–40°C

6652 G10

6652fe