SMP04EQ View Datasheet(PDF) - Analog Devices

Part Name

Description

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SMP04EQ

CMOS Quad Sample-and-Hold Amplifier

Analog Devices 

SMP04

APPLICATIONS

MULTIPLEXED QUAD DAC (Figure 20)

The SMP04 can be used to demultiplex a single DAC converter’s

output into four separate analog outputs. The circuit is greatly

simplified by using a voltage output DAC such as the DAC8228.

To minimize output voltage perturbation, 5 µs should be allowed

to settle to its final voltage before a sample signal is asserted.

Each sample-and-hold amplifier must be refreshed every second

or less in order to assure the droop does not exceed 10 mV or

1/2 LSB.

+12V

0.1␮F

WR

CS

DIGITAL

INPUTS

ADDRESS

INPUTS

+5V

REF02

+12V

VZ VDD

1/2 DAC8228

VO

VREF

GND

5V TO 10V

+12V

1␮F

+

SMP04

VSS

VSS

CHANNEL

S/H1

S/H2

VSS

DECODE

S/H3

S/H4

VSS

DGND

Figure 20. Multiplexed Quad DAC

VOUT1

VOUT2

VOUT3

VOUT4

–10–

REV. D

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