LT1460A-5 データシートの表示（PDF） - Linear Technology

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LT1460A-5

Dual Current Output 12-/14-/16-Bit SoftSpan DACs with Parallel I/O

Linear Technology 

LTC2753

Dual Current Output

12-/14-/16-Bit SoftSpan

DACs with Parallel I/O

FEATURES

■ Six Programmable 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

■ 48-Pin 7mm × 7mm QFN Package

APPLICATIONS

■ High Resolution Offset and Gain Adjustment

■ Process Control and Industrial Automation

■ Automatic Test Equipment

■ Data Acquisition Systems

DESCRIPTION

The LTC®2753 is a family of dual 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 LTC2753A-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 LTC2753 DACs use a bidirectional input/output parallel

interface that allows readback of any on-chip register. A

power-on reset circuit resets the DAC outputs to 0V when

power is initially applied. A logic low on the CLR pin asyn-

chronously clears the DACs to 0V in any output range.

The parts are specified over commercial and industrial

temperature ranges.

, 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.

TYPICAL APPLICATION

Dual 16-Bit VOUT DAC with Software-Selectable Ranges

VREF

5V

ROFSA 47

RIN 2

LTC2753-16

46 RFBA

1/2 LT1469

150pF

R1

RCOM 1

R2

REFA 48

REFB 39

DAC A

15pF

45 IOUT1A

4 IOUT2A

44 RVOSA

43 RVOSB

–

1/2 LT1469

+

VOUTA

32 IOUT2B

+

DAC B

ROFSB 40

3

SPAN I/O

16

DATA I/O

I/O PORT

I/O PORT

42 IOUT1B

15pF

41 RFBB

1/2 LT1469

–

VOUTB

2753 TA01

LTC2753-16 Integral Nonlinearity (INL)

1.0

VDD = 5V

0.8 VREF = 5V

0.6 ±10V RANGE

0.4

0.2

0.0

–0.2

–0.4

–0.6

–0.8

–1.0

0

16384

32768

CODE

25°C

90°C

–45°C

49152 65535

2753 TA01b

2753f

1

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