MAX5133AEEE View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX5133AEEE

+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference

Maxim Integrated 

+5V/+3V, 13-Bit, Serial, Force/Sense DACs

with 10ppm/°C Internal Reference

Using an External Reference

with AC Components

The MAX5132/MAX5133 have multiplying capabilities

within the reference input voltage range specifications.

Figure 13 shows a technique for applying a sinusoidal

input to REF, where the AC signal is offset before being

applied to the reference input.

Power-Supply and Bypassing

Considerations

On power-up, the input and DAC registers are cleared

to either zero (RSTVAL = DGND) or midscale (RSTVAL

= VDD). Bypass the power supply (VDD) with a 4.7µF

capacitor in parallel with a 0.1µF capacitor to AGND.

Minimize lead lengths to reduce lead inductance.

Layout Considerations

Digital and AC signals coupling to AGND can create

noise at the output. Connect AGND to the highest quali-

ty ground available. Use proper grounding techniques,

such as a multilayer board with a low-inductance

ground plane. Wire-wrapped boards and sockets are

not recommended. If noise becomes an issue, shield-

ing may be required.

+5V/

+3V

AC

26k

REFERENCE

INPUT

+5V/+3V

MAX495

500mVp-p

10k

REF

VDD

FB

DAC

OUT

MAX5132

AGND MAX5133 DGND

Figure 13. External Reference with AC Components

___________________Chip Information

TRANSISTOR COUNT: 3308

SUBSTRATE CONNECTED TO AGND.

18 ______________________________________________________________________________________

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