LTC2755BCUP-16#TRPBF Datasheet LTC2755ACUP-16#PBF, LTC2755BIUP-16#PBF, LTC2755CUP-12#TRPBF | P1-P3

LTC2755

1

2755f

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Quad Current Output

12-/14-/16-Bit SoftSpan

DACs with Parallel I/O

The LTC

®

2755 is a family of quad 12-, 14-, and 16-bit

multiplying parallel-input, current-output DACs. These

DACs operate from a single 2.7V to 5.5V supply and are all

guaranteed monotonic over temperature. The LTC2755A-16

provides 16-bit performance (±1LSB INL and DNL) over

temperature without any adjustments. These SoftSpan™

DACs offer six output ranges—two unipolar and four

bipolar—that can be programmed through the parallel

interface, or pinstrapped for operation in a single range.

The LTC2755 DACs use a bidirectional input/output paral-

lel interface that allows readback of any internal register,

including the DAC output span settings. A power-on reset

circuit resets the DAC outputs to 0V when power is initially

applied. A logic low on the CLR pin asynchronously clears

the DACs to 0V in any output range.

The parts are speciﬁ ed over commercial and industrial

temperature ranges.

Quad 16-Bit V

OUT

DAC with Software-Selectable Ranges

■

Program or Pin-Strap Six Output Ranges

Unipolar: 0V to 5V, 0V to 10V

Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V

■

Maximum 16-Bit INL Error: ±1 LSB over Temperature

■

Low 1μA (Maximum) Supply Current

■

Guaranteed Monotonic over Temperature

■

Low Glitch Impulse 1nV•s

■

2.7V to 5.5V Single Supply Operation

■

2µs Settling Time to ±1 LSB

■

Parallel Interface with Readback of All Registers

■

Asynchronous CLR Pin Clears DAC Outputs to 0V in

Any Output Range

■

Power-On Reset to 0V

■

64-Pin 9mm × 9mm QFN Package

■

High Resolution Offset and Gain Adjustment

■

Process Control and Industrial Automation

■

Automatic Test Equipment

■

Data Acquisition Systems

LTC2755-16 Integral Nonlinearity (INL)

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

SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents, including 7034735,

7256721.

2755 TA01

V

REF2

5V

V

REF1

5V

SPAN I/O

DATA I/O

–

+

–

DAC C

I

OUT1C

R

FBC

R

OFSC

R

OFSB

REFDR

OFSD

R

OFSA

MSPAN

GND

R

IN2

R

IN1

REFC

REFA REFB

R

COM2

R

COM1

LTC2755-16

I

OUT2C

I

OUT1D

I

OUT2A

I

OUT1A

R

FBA

R

VOSA

R

FBD

I

OUT2D

R

VOSD

R

VOSC

V

OUTC

V

OUTD

V

OUTA

DAC D

5V

0.1µF

+

–

DAC B

I

OUT2B

R

FBB

V

DD

I

OUT1B

R

VOSB

V

OUTB

–

+

–

I/O PORT

DAC A

+

–

CODE

0

–1.0

INL (LSB)

–0.8

–0.4

–0.2

0.0

1.0

0.4

16384

32768

–0.6

0.6

0.8

0.2

49152

65535

2755 TA01b

25°C

90°C

–45°C

V

DD

= 5V

V

REF

= 5V

±10V RANGE

SINGLE DUAL QUAD

Part Number LTC2751 LTC2753 LTC2755

SoftSpan Parallel I

OUT

DAC Selector Guide

LTC2755

2

2755f

S2

I

OUT2A

GND

D11

D10

D9

D8

D7

D6

D5

D4

D3

GND

I

OUT2D

V

DD

A2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

D/S

S0

I

OUT2B

GND

NC

D0

D1

D2

GND

I

OUT2C

MSPAN

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

A1

A0

GND

CLR

REFD

R

OFSD

R

FBD

I

OUT1D

R

VOSD

R

VOSC

I

OUT1C

R

FBC

R

OFSC

REFC

R

COM2

R

IN2

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

R

IN1

R

COM1

REFA

R

OFSA

R

FBA

I

OUT1A

R

VOSA

R

VOSB

I

OUT1B

R

FBB

R

OFSB

REFB

S1

WR

UPD

READ

65

LTC2755-12 UP PACKAGE

64-LEAD (9mm × 9mm) PLASTIC QFN

T

JMAX

= 125°C, θ

JA

= 28°C/W

EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB

S2

I

OUT2A

GND

D13

D12

D11

D10

D9

D8

D7

D6

D5

GND

I

OUT2D

V

DD

A2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

D/S

S0

I

OUT2B

GND

NC

D0

D1

D2

D3

D4

GND

I

OUT2C

MSPAN

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

A1

A0

GND

CLR

REFD

R

OFSD

R

FBD

I

OUT1D

R

VOSD

R

VOSC

I

OUT1C

R

FBC

R

OFSC

REFC

R

COM2

R

IN2

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

R

IN1

R

COM1

REFA

R

OFSA

R

FBA

I

OUT1A

R

VOSA

R

VOSB

I

OUT1B

R

FBB

R

OFSB

REFB

S1

WR

UPD

READ

65

LTC2755-14 UP PACKAGE

64-LEAD (9mm × 9mm) PLASTIC QFN

T

JMAX

= 125°C, θ

JA

= 28°C/W

EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB

S2

I

OUT2A

GND

D15

D14

D13

D12

D11

D10

D9

D8

D7

GND

I

OUT2D

V

DD

A2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

D/S

S0

I

OUT2B

GND

NC

D0

D1

D2

D3

D4

D5

D6

GND

I

OUT2C

MSPAN

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

A1

A0

GND

CLR

REFD

R

OFSD

R

FBD

I

OUT1D

R

VOSD

R

VOSC

I

OUT1C

R

FBC

R

OFSC

REFC

R

COM2

R

IN2

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

R

IN1

R

COM1

REFA

R

OFSA

R

FBA

I

OUT1A

R

VOSA

R

VOSB

I

OUT1B

R

FBB

R

OFSB

REFB

S1

WR

UPD

READ

65

LTC2755-16 UP PACKAGE

64-LEAD (9mm × 9mm) PLASTIC QFN

T

JMAX

= 125°C, θ

JA

= 28°C/W

EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB

ABSOLUTE MAXIMUM RATINGS

I

OUT1X

, I

OUT2X

, R

COMX

to GND ................................±0.3V

R

VOSX

, R

FBX

, R

OFSX

, R

INX

, REF

X

to GND ..................±15V

V

DD

to GND .................................................. –0.3V to 7V

Digital Inputs and Digital I/O

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

DD

+0.3V (max 7V)

(Notes 1, 2)

PIN CONFIGURATION

ORDER INFORMATION

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

LTC2755CUP-12#PBF LTC2755CUP-12#TRPBF LTC2755UP-12 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C

LTC2755IUP-12#PBF LTC2755IUP-12#TRPBF LTC2755UP-12 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C

LTC2755CUP-14#PBF LTC2755CUP-14#TRPBF LTC2755UP-14 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C

LTC2755IUP-14#PBF LTC2755IUP-14#TRPBF LTC2755UP-14 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C

LTC2755BCUP-16#PBF LTC2755BCUP-16#TRPBF LTC2755UP-16 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C

LTC2755BIUP-16#PBF LTC2755BIUP-16#TRPBF LTC2755UP-16 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C

LTC2755ACUP-16#PBF LTC2755ACUP-16#TRPBF LTC2755UP-16 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C

LTC2755AIUP-16#PBF LTC2755AIUP-16#TRPBF LTC2755UP-16 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C

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

Consult LTC Marketing for information on non-standard lead based ﬁ nish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

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

Operating Temperature Range

LTC2755C ..................................................... 0°C to 70°C

LTC2755I .................................................. –40°C to 85°C

Maximum Junction Temperature........................... 125°C

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

LTC2755

3

2755f

ELECTRICAL CHARACTERISTICS

V

DD

= 5V, V

REF

= 5V unless otherwise speciﬁ ed. The ● denotes the

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

A

= 25°C.

SYMBOL PARAMETER CONDITIONS

LTC2755-12 LTC2755-14 LTC2755B-16 LTC2755A-16

UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX

Static Performance

Resolution

●

12 14 16 16 Bits

Monotonicity

●

12 14 16 16 Bits

DNL Differential

Nonlinearity

●

±1 ±1 ±1 ±0.2 ±1 LSB

INL Integral

Nonlinearity

●

±1 ±1 ±2 ±0.4 ±1 LSB

GE Gain Error All Output

Ranges

●

±0.5 ±2 ±1 ±5 ±20 ±2 ±12 LSB

GE

TC

Gain Error Temp-

erature Coefﬁ cient

ΔGain/ΔTemp ±0.6 ±0.6 ±0.6 ±0.6 ppm/°C

BZE Bipolar Zero Error All Bipolar

Ranges

●

±0.2 ±1 ±0.5 ±3 ±12 ±1 ±8 LSB

BZS

TC

Bipolar Zero Temp-

erature Coefﬁ cient

±0.5 ±0.5 ±0.5 ±0.5 ppm/°C

PSR Power Supply

Rejection

V

DD

= 5V, ±10%

V

DD

= 3V, ±10%

●

±0.025

±0.06

±0.1

±0.25

±0.4

±1

±0.03

±0.1

±0.2

±0.5

LSB/V

I

LKG

I

OUT1

Leakage

Current

T

A

= 25°C

T

MIN

to T

MAX

●

±0.05 ±2

±5

±0.05 ±2

±5

±0.05 ±2

±5

±0.05 ±2

±5

nA

C

IOUT1

Output

Capacitance

Full-Scale

Zero Scale

75

45

75

45

75

45

75

45

pF

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Resistances (Note 3)

R1, R2, R3, R4 Reference Inverting Resistors (Note 4)

●

16 20 k

R

REF

DAC Input Resistance

●

810 k

R

FB

Feedback Resistor (Note 3)

●

810 k

R

OFS

Bipolar Offset Resistor (Note 3)

●

16 20 k

R

VOS

Offset Adjust Resistor

●

800 1000 k

Dynamic Performance

Output Settling Time 0V to 10V Range, 10V Step. To ±0.0015% FS

(Note 5)

2s

Glitch Impulse (Note 6) 1 nV•s

Digital-to-Analog Glitch Impulse (Note 7) 1 nV•s

Reference Multiplying BW 0V to 5V Range, V

REF

= 3V

RMS

,

code = Full Scale, –3dB BW

2 MHz

Multiplying Feedthrough Error 0V to 5V Range, V

REF

= ±10V, 10kHz

Sine Wave

0.5 mV

Analog Crosstalk (Note 8) –109 dB

THD Total Harmonic Distortion (Note 9) Multiplying –110 dB

Output Noise Voltage Density (Note 10) at I

OUT1

13 nV/√

⎯

H

⎯

z

V

DD

= 5V, V

REF

= 5V unless otherwise speciﬁ ed. The ● denotes speciﬁ cations that apply over the full operating temperature range,

otherwise speciﬁ cations are at T

A

= 25°C.

LTC2755BCUP-16#TRPBF

LTC2755BCUP-16#TRPBF

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