TLC5618, TLC5618A

PROGRAMMABLE DUAL 12-BIT DIGITAL-TO-ANALOG CONVERTERS

SLAS156G – JULY 1997 – REVISED APRIL 2001

12

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

–2

–1

–1.5

1

0.5

0

–0.5

–2.5

–3.0

Samples

500

2000

3000

4095

0

1000

1500

2500

3500

Figure 16. Integral Nonlinearity With Input Code

APPLICATION INFORMATION

general function

The TLC5618 uses a resistor string network buffered with an op amp to convert 12-bit digital data to analog

voltage levels (see functional block diagram and Figure 17). The output is the same polarity as the reference

input (see Table 1).

The output code is given by: 2 V

REFIN

CODE

4096

An internal circuit resets the DAC register to all 0s on power up.

_

+

Resistor

String

DAC

5 V

0.1

µF

AGND

VDD

OUT

REFIN

R

R

_

+

×2

DIN

CS

SCLK

Figure 17. TLC5618 Typical Circuit