+5V, Serial-Input, Voltage-Output, 16-Bit DACs

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Detailed Description

The MAX541/MAX542 voltage-output, 16-bit digital-to-

analog converters (DACs) offer full 16-bit performance

with less than 1LSB integral linearity error and less than

1LSB differential linearity error, thus ensuring monoton-

ic performance. Serial data transfer minimizes the num-

ber of package pins required.

The MAX541/MAX542 are composed of two matched

DAC sections, with a 12-bit inverted R-2R DAC forming

the 12 LSBs and the 4 MSBs derived from 15 identically

matched resistors. This architecture allows the lowest

glitch energy to be transferred to the DAC output on

major-carry transitions. It also lowers the DAC output

impedance by a factor of eight compared to a standard

R-2R ladder, allowing unbuffered operation in medium-

load applications.

The MAX542 provides matched bipolar offset resistors,

which connect to an external op amp for bipolar output

swings (Figure 2b). For optimum performance, the

MAX542 also provides a set of Kelvin connections to

the voltage-reference and analog-ground inputs.

MAX542

MAX400

AGNDF

DGND

(GND)

REFF

REFS

RFB

INV

OUT

LDAC

SCLK

DIN

CS

AGNDS

0.1

µF

+5V

EXTERNAL OP AMP

MC68XXXX

PCS0

MOSI

SCLK

IC1

BIPOLAR

OUT

+5V

-5V

0.1

µF

+2.5V

10

µF

Figure 2b. Typical Operating Circuit—Bipolar Output

MAX541/MAX542

MAX495

DGND

( ) ARE FOR MAX542 ONLY

(GND)

(REFS)

REF (REFF)

OUT

SCLK

DIN

CS

AGND_

0.1

µF

0.1

µF

+5V

+2.5V

EXTERNAL OP AMP

MC68XXXX

PCS0

MOSI

SCLK

UNIPOLAR

OUT

10

µF

Figure 2a. Typical Operating Circuit—Unipolar Output