Linear Technology DC1112A - LTC2755: 16-bit, Quad, SoftSpan, 1LSB INL Iout DAC, req. DC590 DC1112A DC1112A Scheda Tecnica

LTC2755

1

2755f

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.

■

  Program or Pin-Strap Six Output Ranges 

 

 

■

  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

 

, 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

REFD

R

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

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

Part Number

LTC2751

LTC2753

LTC2755