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FEATURES

n

LTC2654

Quad 16-/12-Bit Rail-to-Rail

DACs with 10ppm/°C

Max Reference

DESCRIPTION

The LTC

®

2654 is a family of quad 16-/12-bit rail-to-rail

DACs with integrated 10ppm/°C maximum reference . The

DACs have built-in high performance, rail-to-rail, output

buffers and are guaranteed monotonic. The LTC2654-L

has a full-scale output of 2.5V with the integrated refer-

ence and operates from a single 2.7V to 5.5V supply.

The LTC2654-H has a full-scale output of 4.096V with

the integrated reference and operates from a 4.5V to

5.5V supply. Each DAC can also operate with an external

reference, which sets the full-scale output to 2 times the

external reference voltage.

These DACs communicate via a SPI/MICROWIRE™ com-

patible 4-wire serial interface which operates at clock rates

up to 50MHz. The LTC2654 incorporates a power-on reset

circuit that is controlled by the PORSEL pin. If PORSEL

is tied to GND the DACs reset to zero-scale. If PORSEL is

tied to V

CC

, the DACs reset to mid-scale.

L,

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

Technology Corporation. SPI/MICROWIRE is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners. Protected by U.S. Patents,

including 5396245, 6891433 and patent pending.

Precision Reference 10ppm/°C Max

Maximum INL Error: ±4LSB at 16-Bits

Low ±2mV (Max) Offset Error

Guaranteed Monotonic Over Temperature

Selectable Internal or External Reference

2.7V to 5.5V Supply Range (LTC2654-L)

Integrated Reference Buffers

Ultralow Crosstalk Between DACs (<3nV•s)

Power-on-Reset to Zero-Scale/Mid-Scale

Asynchronous DAC Update Pin

Tiny 20-Lead 4mm

×

4mm QFN and 16-Lead Narrow

SSOP Packages

APPLICATIONS

n

Mobile Communications

Process Control and Industrial Automation

Instrumentation

Automatic Test Equipment

Automotive

BLOCK DIAGRAM

REFCOMP

GND

REFLO

REGISTER

V

OUTA

DAC A

DAC D

V

OUTD

3

2

INL (LSB)

1

0

–1

–2

–3

CONTROL LOGIC

SCK

SDI

LDAC

32-BIT SHIFT REGISTER

CLR

DECODE

POWER-ON

RESET

PORSEL

SDO

–4

128

16384

32768

CODE

49152

65535

2654 TA01b

INTERNAL REFERENCE

REFIN/OUT

V

CC

INL Curve

4

V

CC

= 5V

REGISTER

V

OUTB

DAC B

DAC C

V

OUTC

CS/LD

2654 TA01a

2654f

1

LTC2654

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2)

Supply Voltage (V

CC

) ................................... –0.3V to 6V

CS/LD,

SCK, SDI,

LDAC, CLR,

REFLO .......... –0.3V to 6V

V

OUTA-D

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

CC

+ 0.3V, 6V)

REFIN/OUT, REFCOMP .....–0.3V to Min (V

CC

+ 0.3V, 6V)

PORSEL, SDO ..................–0.3V to Min (V

CC

+ 0.3V, 6V)

Operating Temperature Range

LTC2654C ................................................ 0°C to 70°C

LTC2654I..............................................–40°C to 85°C

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

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

Lead Temperature

(Soldering GN-Package, 10 sec) ....................... 300°C

PIN CONFIGURATION

TOP VIEW

REFLO

GND

DNC

TOP VIEW

REFLO

V

OUTA

REFCOMP

V

OUTB

REFIN/OUT

LDAC

CS/LD

SCK

1

2

3

4

5

6

7

8

16 GND

15 V

CC

14 V

OUTD

13 V

OUTC

12 PORSEL

11

CLR

10 SDO

9

SDI

6

CS/LD

7

SCK

8

DNC

9 10

SDI

SDO

V

OUTA

1

REFCOMP 2

V

OUTB

3

REFIN/OUT 4

LDAC

5

21

GND

DNC

15 DNC

14 V

OUTD

13 V

OUTC

12 PORSEL

11

CLR

V

CC

20 19 18 17 16

GN PACKAGE

16-LEAD PLASTIC SSOP NARROW

T

JMAX

= 150°C,

θ

JA

= 110°C/W

UF PACKAGE

20-LEAD (4mm 4mm) PLASTIC QFN

T

JMAX

= 150°C,

θ

JA

= 37°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

2654f

2

LTC2654

PRODUCT SELECTOR GUIDE

LTC2654

B

C

UF

–L

16

#TR PBF

LEAD FREE DESIGNATOR

TAPE AND REEL

TR = Tape and Reel

RESOLUTION

16 = 16-Bit

12 = 12-Bit

FULL-SCALE VOLTAGE, INTERNAL REFERENCE MODE

L = 2.5V

H = 4.096V

PACKAGE TYPE

UF = 20-Lead (4mm

×

4mm) Plastic QFN

GN = 16-Lead Narrow SSOP

TEMPERATURE GRADE

C = Commercial Temperature Range (0°C to 70°C)

I = Industrial Temperature Range (–40°C to 85°C)

ELECTRICAL GRADE (OPTIONAL)

B = ±4LSB INL (MAX)

PRODUCT PART NUMBER

Consult LTC Marketing for information on non-standard lead based ﬁnish parts. 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/

2654f

3

LTC2654

ORDER INFORMATION

LEAD FREE FINISH

LTC2654BCGN-L16#PBF

LTC2654BIGN-L16#PBF

LTC2654BCUF-L16#PBF

LTC2654BIUF-L16#PBF

LTC2654BCGN-H16#PBF

LTC2654BIGN-H16#PBF

LTC2654BCUF-H16#PBF

LTC2654BIUF-H16#PBF

LTC2654CGN-L12#PBF

LTC2654IGN-L12#PBF

LTC2654CUF-L12#PBF

LTC2654IUF-L12#PBF

LTC2654CGN-H12#PBF

LTC2654IGN-H12#PBF

LTC2654CUF-H12#PBF

LTC2654IUF-H12#PBF

TAPE AND REEL

LTC2654BCGN-L16#TRPBF

LTC2654BIGN-L16#TRPBF

LTC2654BCUF-L16#TRPBF

LTC2654BIUF-L16#TRPBF

LTC2654BIGN-H16#TRPBF

LTC2654BCUF-H16#TRPBF

LTC2654BIUF-H16#TRPBF

LTC2654CGN-L12#TRPBF

LTC2654IGN-L12#TRPBF

LTC2654CUF-L12#TRPBF

LTC2654IUF-L12#TRPBF

LTC2654CGN-H12#TRPBF

LTC2654IGN-H12#TRPBF

LTC2654CUF-H12#TRPBF

LTC2654IUF-H12#TRPBF

PART MARKING* PACKAGE DESCRIPTION

654L16

54L16

654H16

54H16

654L12

54L12

654H12

54H12

16-Lead Narrow SSOP

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

16-Lead Narrow SSOP

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

16-Lead Narrow SSOP

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

16-Lead Narrow SSOP

20-Lead (4mm

×

4mm) Plastic QFN

20-Lead (4mm

×

4mm) Plastic QFN

TEMPERATURE

RANGE

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

0°C to 70°C

–40°C to 85°C

MAXIMUM

INL

±4

±1

LTC2654BCGN-H16#TRPBF 654H16

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/

ELECTRICAL CHARACTERISTICS

The

l

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

A

= 25°C. V

CC

= 2.7V to 5.5V, V

OUT

unloaded unless otherwise speciﬁed.

LTC2654-12

LTC2654B-16

MIN

16

±0.1

±0.5

0.04

0.06

1

±1

5

(Note 13)

l

LTC2654B-L16/LTC2654-L12 (Internal Reference = 1.25V)

SYMBOL PARAMETER

DC Performance

Resolution

Monotonicity

DNL

INL

Differential Nonlinearity

Integral Nonlinearity

Load Regulation

(Note 3)

V

CC

= 5.5V, V

REF

= 2.5V (Note 3)

V

CC

= 5V ±10%, Integral Reference,

Mid-Scale, –15mA ≤ I

OUT

≤ 15mA

V

CC

= 3V ±10%, Integral Reference,

Mid-Scale, –7.5mA ≤ I

OUT

≤ 7.5mA

ZSE

V

OS

GE

Zero-Scale Error

Offset Error

V

OS

Temperature Coefﬁcient

Gain Error

Gain Temperature Coefﬁcient

(Note 4)

l

CONDITIONS

MIN

12

TYP

MAX

TYP

MAX

UNITS

Bits

±0.5

±1

0.125

0.25

3

±2

±0.1

±0.3

±2

0.6

1

±1

5

±0.02

1

±1

±4

2

4

3

±2

±0.1

LSB

LSB/mA

mV

μV/°C

%FSR

ppm/°C

2654f

±0.02

1

4

LTC2654

ELECTRICAL CHARACTERISTICS

SYMBOL

V

OUT

PSR

R

OUT

PARAMETER

DAC Output Span

Power Supply Rejection

DC Output Impedance

The

l

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

A

= 25°C. V

CC

= 2.7V to 5.5V, V

OUT

unloaded unless otherwise speciﬁed.

CONDITIONS

Internal Reference

External Reference = V

EXTREF

V

CC

±10%

V

CC

= 5V ±10%, Internal Reference,

Mid-Scale, –15mA ≤ I

OUT

≤ 15mA

V

CC

= 3V ±10%, Internal Reference,

Mid-Scale, –7.5mA ≤ I

OUT

≤ 7.5mA

Due to Full-Scale Output Change (Note 5)

Due to Load Current Change (Note 5)

Due to Powering Down (per Channel) (Note 5)

V

CC

= 5.5V V

EXTREF

= 2.8V (Note 6)

Code: Zero-Scale; Forcing Output to V

CC

(Note 6)

Code: Full-Scale; Forcing Output to GND (Note 6)

V

CC

= 2.7V V

EXTREF

= 1.4V

Code: Zero-Scale; Forcing Output to V

CC

Code: Full-Scale; Forcing Output to GND

l

MIN

TYP

0 to 2.5

0 to 2•V

EXTREF

–80

0.04

±1.5

±2

±1

MAX

UNITS

V

dB

0.15

Ω

μV

μV/mA

μV

DC Crosstalk

I

SC

Short-Circuit Output Current

20

10

65

45

mA

LTC2654B-L16/ LTC2654-L12 (Internal Reference = 1.25V)

SYMBOL PARAMETER

Reference

Reference Output Voltage

Reference Temperature Coefﬁcient

Reference Line Regulation

Reference Short-Circuit Current

Refcomp Pin Short-Circuit Current

Reference Load Regulation

Reference Output Voltage Noise Density

Reference Input Range

Reference Input Current

Reference Input Capacitance

Power Supply

V

CC

I

CC

Positive Supply Voltage

Supply Current

For Speciﬁed Performance

V

CC

= 5V, Internal Reference On (Note 8)

V

CC

= 5V, Internal Reference Off (Note 8)

V

CC

= 3V, Internal Reference On (Note 8)

V

CC

= 3V, Internal Reference Off (Note 8)

V

CC

= 5V (Note 8)

V

CC

= 3.6V to 5.5V

V

CC

= 2.7V to 3.6V

V

CC

= 4.5V to 5.5V

V

CC

= 2.7V to 4.5V

Load Current = –100μA

Load Current = 100μA

l

CONDITIONS

MIN

1.248

TYP

1.25

±2

–80

MAX

1.252

±10

5

200

UNITS

V

ppm/°C

dB

mA

μA

mV/mA

nV/√Hz

(Note 7)

V

CC

±10%

V

CC

= 5.5V, Forcing Output to GND

V

CC

= 5.5V, Forcing Output to GND

V

CC

= 3V ±10% or 5V ±10%, I

OUT

= 100μA Sourcing

,

C

REFCOMP

= C

REFIN/OUT

= 0.1μF at f = 1kHz

External Reference Mode (Note 13)

(Note 9)

l

3

60

40

30

0.5

0.001

20

2.7

1.7

1.3

1.6

1.2

V

CC

/2

1

V

μA

pF

5.5

2.5

2

2.2

1.7

3

V

mA

μA

V

I

SD

Digital I/O

V

IH

V

IL

V

OH

V

OL

Supply Current in Shutdown Mode

Digital Input High Voltage

Digital Input Low Voltage

Digital Output High Voltage

Digital Output Low Voltage

l

2.4

2.0

0.8

0.6

V

CC

– 0.4

0.4

V

2654f

5

LTC2654BIUF-L16PBF

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