AD7720
–5–REV. 0
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 AD7720 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.
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= +25°C unless otherwise noted)
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
Digital Input Voltage to DGND . . –0.3 V to DVDD + 0.3 V
Analog Input Voltage to AGND . . . –0.3 V to AVDD + 0.3 V
Input Current to Any Pin Except Supplies
2
. . . . . . . ±10 mA
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . +150°C
TSSOP Package
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . 120°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2
Transient currents of up to 100 mA will not cause SCR latchup.
PIN CONFIGURATION
ORDERING GUIDE
Temperature Package Package
Model Range Description Option
AD7720BRU –40°C to +85°C 28-Lead Thin Shrink Small Outline RU-28
WARNING!
ESD SENSITIVE DEVICE
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
AD7720
NC = NO CONNECT
NC
SCLK
DATA
MZERO
BIP
REF2
AGND
NC
STBY
GC
DGND
DVAL
XTAL1/MCLK
XTAL2
VIN(–)
AVDD
REF1
AVDD
RESET
VIN(+)
AGND
RESETO
DGND
AGND
DVDD
AGND
AGND
AGND