DAC124S085

DIN

SCLK

SYNC

0.1 PF

+

10 PF

+

-

+5V

-5V

+5V

±5V

10 pF

Copyright © 2016, Texas Instruments Incorporated

19

DAC124S085

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SNAS348G – MAY 2006 – REVISED APRIL 2016

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Copyright © 2006–2016, Texas Instruments Incorporated

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

Figure 35 is an example of the DAC124S085 in a typical application. This circuit is basic and generally requires

modification for specific circumstances.

9.2 Typical Application

9.2.1 Bipolar Operation

The DAC124S085 is designed for single-supply operation and thus has a unipolar output. However, a bipolar

output may be obtained with the circuit in Figure 35. This circuit provides an output voltage range of ±5 V. A rail-

to-rail amplifier must be used if the amplifier supplies are limited to ±5 V.

Figure 35. Bipolar Operation

9.2.1.1 Design Requirements

•

The DAC124S085 uses a single supply.

•

The output is required to be bipolar with a voltage range of ±5 V.

•

Dual supplies are used for the output amplifier.

9.2.1.2 Detailed Design Procedure

The output voltage of this circuit for any code is found with Equation 2.

where

•

D is the input code in decimal form

(2)

(3)

A list of rail-to-rail amplifiers suitable for this application are indicated in Table 2.