MAX5156BEEE Просмотр технического описания (PDF) - Maxim Integrated

Номер в каталоге

Компоненты Описание

производитель

MAX5156BEEE

Low-Power, Dual, 12-Bit Voltage-Output DACs with Configurable Outputs

Maxim Integrated 

Low-Power, Dual, 12-Bit Voltage-Output DACs

with Configurable Outputs

REF_

+5V/+3V

VDD

MAX5156

MAX5157

DAC

R2

FB_

R1

VOUT

OUT_

DGND

AGND

( ) ( )( ) VOUT = 1 + R1 N VREF_

R2 4096

Figure 10. Configurable Output Gain

REF_

+5V/+3V

10k

VDD

MAX5156

FB_

MAX5157

DAC _

OUT_

DGND AGND

Figure 11. Bipolar Output Circuit

10k

V+

VOUT

V-

Table 3. Bipolar Code Table

DAC CONTENTS

MSB

LSB

ANALOG OUTPUT

1111 1111 1111(0)

1000 0000 0001(0)

1000 0000 0000(0)

0111 1111 1111(0)

+VREF

 2047

 2048

+VREF

 1

 2048

0V

-VREF

 1

 2048

0000 0000 0001(0)

0000 0000 0000(0)

Note: ( ) are for the sub bit.

-VREF





2047 

2048 

-VREF

 2048

 2098

= - VREF

+5V/

+3V

AC 26k

REFERENCE

INPUT

+5V/+3V

MAX495

500mVp-p

10k

REF_

VDD

FB_

DAC_

OUT_

MAX5156

DGND MAX5157 AGND

Figure 12. AC Reference Input Circuit

Using an AC Reference

In applications where the reference has an AC signal

component, the MAX5156/MAX5157 have multiplying

capabilities within the reference input voltage range

specifications. Figure 12 shows a technique for apply-

ing a sinusoidal input REF_, where the AC signal is off-

set before being applied to the reference input.

Harmonic Distortion and Noise

The total harmonic distortion plus noise (THD+N) is typ-

ically less than -80dB at full scale with a 1Vp-p input

swing at 5kHz. The typical -3dB frequency is 600kHz

for both devices, as shown in the Typical Operating

Characteristics.

14 ______________________________________________________________________________________

Share Link: