AD7721 Analog Devices, AD7721 Datasheet - Page 5

• Manufacturer Part Number: AD7721
• Description: CMOS, 12-/16-Bit, 312.5 kHz/468.75 kHz Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7721

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: n/a
• Interface: Par,Ser
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: (Vref) p-p,Uni (Vref)
• Adc Architecture: Sigma-Delta
• Pkg Type: DIP,SOIC

REV. A
ABSOLUTE MAXIMUM RATINGS
(T
DV
AV
AV
AGND to DGND . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
Digital Input Voltage to DGND . . . –0.3 V to DV
Analog Input Voltage to AGND . . . . –0.3 V to AV
Input Current to Any Pin Except Supplies
Operating Temperature Range
Storage Temperature Range . . . . . . . . . . . . –65 C to +150 C
Maximum Junction Temperature . . . . . . . . . . . . . . . +150 C
Plastic Package
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 this device 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.
Model
AD7721AN
AD7721AR
AD7721SQ
*N = Plastic DIP; R = 0.3" Small Outline IC (SOIC); Q = Cerdip.
Industrial (A Version) . . . . . . . . . . . . . . . . . –40 C to +85 C
Extended (S Version) . . . . . . . . . . . . . . . . –55 C to +125 C
A
DD
DD
JA
= +25 C unless otherwise stated)
DD
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 74 C/W
to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
to DV
to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
DD
. . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
Temperature Range
–40 C to +85 C
–40 C to +85 C
–55 C to +125 C
ORDERING GUIDE
1
2
Package Option*
N-28
R-28
Q-28
. . . . . . .
DD
DD
+ 0.3 V
+ 0.3 V
10 mA
–5–
Cerdip Package
SOIC Package
NOTES
1
2
Stresses above those listed under Absolute Maximum Ratings may cause perma-
Transient currents of up to 100 mA will not cause SCR latchup.
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.
Lead Temperature, Soldering (10 sec) . . . . . . . . . . +260 C
Lead Temperature, Soldering (10 sec) . . . . . . . . . . +300 C
Lead Temperature, Soldering
JA
JA
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220 C
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 72 C/W
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 51 C/W
SDATA/DB11
SCLK/DB7
STBY/DB0
RFS/DB10
CAL/DB1
DSUBST
UNI/DB2
PIN CONFIGURATION
DGND
DGND
DV
DB8
DB9
DB3
DB4
DD
10
11
12
13
14
1
2
3
4
5
6
7
8
9
(Not to Scale)
TOP VIEW
AD7721
WARNING!
27
26
25
24
23
22
20
19
18
17
16
15
28
21
DB6
RD
WR
DVAL/SYNC
AGND
VIN2
VIN1
REFIN
AGND
AV
CS
CLK
DRDY
SYNC/DB5
DD
ESD SENSITIVE DEVICE
AD7721