Datasheet

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
DV
DD
to DGND –0.3 6 V
AV
DD
to AGND –0.3 6 V
Digital Inputs DGND – 0.3 DV
DD
+ 0.3 V
Analog Outputs AGND – 0.3 AV
DD
+ 0.3 V
AGND to DGND –0.3 +0.3 V
Reference Voltage (AV
DD
+ 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
CLATC
H
MUTE
PD/RST
CDATA
AD1955