AD7835AS Analog Devices Inc, AD7835AS Datasheet - Page 19

• Manufacturer Part Number: AD7835AS
• Description: IC DAC 14BIT QUAD PARA 44-MQFP
• Manufacturer: Analog Devices Inc

Specifications of AD7835AS

• Rohs Status: RoHS non-compliant
• Settling Time: 10µs
• Number Of Bits: 14
• Data Interface: Parallel
• Number Of Converters: 4
• Voltage Supply Source: Analog and Digital, Dual ±
• Power Dissipation (max): 465mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-MQFP, 44-PQFP

POWER-ON OF THE AD7834/AD7835
Power is normally applied to the AD7834/AD7835 in the
following sequence: first V
V
power is applied to the part. V
V
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.
REF
REF
DD
(+) and V
(−) − 0.3 V. V
is not allowed to go below V
REF
(−). The V
REF
(−) is not allowed to go below V
DD
REF
and V
pins are not allowed to float when
REF
(+) is not allowed to go below
CC
− 0.3 V.
SS
, then V
CC
, and then
SS
− 0.3 V.
Rev. D | Page 19 of 28
1
ADDITIONAL PINS OMITTED FOR CLARITY
Figure 25. Power-On Protection
AD7834
V
V
REF
REF
(+)
(–)
1
AD7834/AD7835
SD103C
1N5711
1N5712