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Graphic

Forthcoming

Graphic

Forthcoming

PARAMETER MEASUREMENT INFORMATION

SDI

CLK

CS

LDAC

SDO

Input REG. LD

A1

A0

D15 D14 D13

D13 D12

D11 D10

D1

D0

THEORY OF OPERATION

CIRCUIT OPERATION

D/A Converter

DAC8814

SBAS338 – JANUARY 2005

TYPICAL CHARACTERISTICS: V

At T

LINEARITY ERROR

DIFFERENTIAL LINEARITY ERROR

vs DIGITAL INPUT CODE

vs DIGITAL INPUT CODE

Figure 51.

Figure 52.

Figure 53. DAC8814 Timing Diagram

The DAC8814 contains four, 16-bit, current-output, digital-to-analog converters (DACs) respectively. Each DAC

has its own independent multiplying reference input. The DAC8814 uses a 3-wire SPI compatible serial data

interface, with a configurable asynchronous RS pin for half-scale (MSB = 1) or zero-scale (MSB = 0) preset. In

addition, an LDAC strobe enables four channel simultaneous updates for hardware synchronized output voltage

changes.

The DAC8814 contains four current-steering R-2R ladder DACs. Figure 54 shows a typical equivalent DAC.

16-bit accuracy.

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