LTC2755

1

2755f

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Quad Current Output

12-/14-/16-Bit SoftSpan

DACs with Parallel I/O

multiplying parallel-input, current-output DACs. These

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

guaranteedmonotonicovertemperature.TheLTC2755A-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 specified over commercial and industrial

temperature 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

5V

5V

SPAN I/O

DATA I/O

–

+

DAC C

REFD

MSPAN

GND

REFC

REFA REFB

LTC2755-16

DAC D

5V

0.1μF

+

–

DAC B

–

+

+

–

I/O PORT

I/O PORT

DAC A

+

–

CODE

0

–1.0

–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

±10V RANGE

SINGLE

DUAL

QUAD

Part Number

LTC2751

LTC2753

LTC2755