AD7835APZ-REEL1 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD7835APZ-REEL1

LC2MOS Quad 14-Bit DACs

Analog Devices 

POWER-ON OF THE AD7834/AD7835

Power is normally applied to the AD7834/AD7835 in the

following sequence: first VDD and VSS, then VCC, and then

VREF(+) and VREF(−). The VREF pins are not allowed to float when

power is applied to the part. VREF(+) is not allowed to go below

VREF(−) − 0.3 V. VREF(−) is not allowed to go below VSS − 0.3 V.

VDD is not allowed to go below VCC − 0.3 V.

In some systems, it is necessary to introduce one or more

Schottky diodes between pins to prevent the above situations

arising at power-on. These diodes are shown in Figure 25.

However, in most systems, with careful consideration given to

power supply sequencing, the above rules are adhered to, and

protection diodes are not necessary.

AD7834/AD7835

VREF(+)

AD78341

VREF(–)

SD103C

1N5711

1N5712

1ADDITIONAL PINS OMITTED FOR CLARITY

Figure 25. Power-On Protection

Rev. D | Page 19 of 28

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