AD5304/AD5314/AD5324

Data Sheet

Rev. H | Page 20 of 24

POWER SUPPLY BYPASSING AND GROUNDING

In any circuit where accuracy is important, careful consideration of

the power supply and ground return layout helps to ensure the

rated performance. The printed circuit board on which the

AD5304/AD5314/AD5324 is mounted is designed so that the

analog and digital sections are separated and confined to certain

areas of the board. If the AD5304/AD5314/AD5324 are in a

system where multiple devices require an AGND-to-DGND

connection, the connection is made at one point only. The star

ground point is established as close as possible to the device. The

AD5304/AD5314/AD5324 has ample supply bypassing of 10 μF in

parallel with 0.1 μF on the supply located as close to the package as

possible, ideally right up against the device. The 10 μF capacitors

are the tantalum bead type. The 0.1 μF capacitor has low effective

series resistance (ESR) and effective series inductance (ESI), like

the common ceramic types that provide a low impedance path

to ground at high frequencies, to handle transient currents due

to internal logic switching.

The power supply lines of the AD5304/AD5314/AD5324 use as

large a trace as possible to provide low impedance paths and reduce

the effects of glitches on the power supply line. Fast switching

signals such as clocks are shielded with digital ground to avoid

radiating noise to other parts of the board, and are never run

near the reference inputs. Avoid crossover of digital and analog

signals. Traces on opposite sides of the board run at right angles

to each other. This reduces the effects of feedthrough through

the board. A microstrip technique is by far the best, but is not

always possible with a double-sided board. In this technique,

the component side of the board is dedicated to a ground plane

while signal traces are placed on the solder side.

Table 7. Overview of AD53xx Serial Devices

Part No.

Resolution

No. of DACs

DNL

Interface

Settling Time (μs)

Package

Pins

SINGLES

AD5300

8

1

±0.25

SPI

4

SOT-23, MSOP

6, 8

AD5310

10

1

±0.5

SPI

6

SOT-23, MSOP

6, 8

AD5320

12

1

±1.0

SPI

8

SOT-23, MSOP

6, 8

AD5301

8

1

±0.25

2-Wire

6

SOT-23, MSOP

6, 8

AD5311

10

1

±0.5

2-Wire

7

SOT-23, MSOP

6, 8

AD5321

12

1

±1.0

2-Wire

8

SOT-23, MSOP

6, 8

DUALS

AD5302

8

2

±0.25

SPI

6

MSOP

8

AD5312

10

2

±0.5

SPI

7

MSOP

8

AD5322

12

2

±1.0

SPI

8

MSOP

8

AD5303

8

2

±0.25

SPI

6

TSSOP

16

AD5313

10

2

±0.5

SPI

7

TSSOP

16

AD5323

12

2

±1.0

SPI

8

TSSOP

16

QUADS

AD5304

8

4

±0.25

SPI

6

MSOP, LFCSP

10

AD5314

10

4

±0.5

SPI

7

MSOP, LFCSP

10

AD5324

12

4

±1.0

SPI

8

MSOP, LFCSP

10

AD5305

8

4

±0.25

2-Wire

6

MSOP

10

AD5315

10

4

±0.5

2-Wire

7

MSOP

10

AD5325

12

4

±1.0

2-Wire

8

MSOP

10

AD5306

8

4

±0.25

2-Wire

6

TSSOP

16

AD5316

10

4

±0.5

2-Wire

7

TSSOP

16

AD5326

12

4

±1.0

2-Wire

8

TSSOP

16

AD5307

8

4

±0.25

SPI

6

TSSOP

16

AD5317

10

4

±0.5

SPI

7

TSSOP

16

AD5327

12

4

±1.0

SPI

8

TSSOP

16

OCTALS

AD5308

8

8

±0.25

SPI

6

TSSOP

16

AD5318

10

8

±0.5

SPI

7

TSSOP

16

AD5328

12

8

±1.0

SPI

8

TSSOP

16