REV. 0

AD1955

–5–

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although the

AD1955 features proprietary ESD protection circuitry, permanent damage may occur on devices

subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended

to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS*

Parameter

Min

Max

Unit

DVDD to DGND

–0.3

6

V

AVDD to AGND

–0.3

6

V

Digital Inputs

DGND – 0.3

DVDD + 0.3

V

Analog Outputs

AGND – 0.3

AVDD + 0.3

V

AGND to DGND

–0.3

+0.3

V

Reference Voltage

(AVDD + 0.3)/2

Soldering

300

°C

10

sec

*Stresses greater than those listed under Absolute Maximum Ratings may cause

permanent damage to the device. This is a stress rating only; functional operation

of the device at these or any other conditions above those indicated in the

operational section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

PACKAGE CHARACTERISTICS

Package

Typ

Unit

JA (Thermal Resistance

109.0

°C/W

[Junction-to-Ambient])

JC (Thermal Resistance

39.0

°C/W

[Junction-to-Case])

ORDERING GUIDE

Model

Temperature

Package Description

Package Option*

AD1955ARS

–40

°C to +85°C

28-Lead SSOP

RS-28

AD1955ARSRL

–40

°C to +85°C

28-Lead SSOP

RS-28 on 13" Reels

EVAL-AD1955EB

Evaluation Board

*RS = Shrink Small Outline Package

TOP VIEW

(Not to Scale)

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

IREF

FILTR

IOUTR–

IOUTR+

AGND

DSD_PHASE

DSD_RDATA

DVDD

LRCLK/EF_WCLK

BCLK/EF_BCLK

SDATA/EF_LDATA

DSD_LDATA

DSD_SCLK

EF_RDATA

AVDD

FILTB

IOUTL–

IOUTL+

AGND

ZEROR

ZEROL

DGND

MCLK

CCLK

CLATCH

MUTE

PD/RST

CDATA

AD1955