Datasheet
AD9224
–4–
REV. A
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 AD9224 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
ABSOLUTE MAXIMUM RATINGS*
With
Pin Name Respect to Min Max Units
AVDD AVSS –0.3 +6.5 V
DRVDD DRVSS –0.3 +6.5 V
AVSS DRVSS –0.3 +0.3 V
AVDD DRVDD –6.5 +6.5 V
REFCOM AVSS –0.3 +0.3 V
CLK AVSS –0.3 AVDD + 0.3 V
Digital Outputs DRVSS –0.3 DRVDD + 0.3 V
VINA, VINB AVSS –0.3 AVDD + 0.3 V
VREF AVSS –0.3 AVDD
+ 0.3 V
SENSE AVSS –0.3 AVDD
+ 0.3 V
CAPB, CAPT AVSS –0.3 AVDD
+ 0.3 V
Junction Temperature +150 °C
Storage Temperature –65 +150 °C
Lead Temperature (10 sec) +300 °C
*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 indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum
ratings for extended periods may affect device reliability.
t
CL
t
CH
t
C
t
OD
DATA 1
DATA
OUTPUT
INPUT
CLOCK
ANALOG
INPUT
S1
S2
S3
S4
Figure 1. Timing Diagram
PIN CONFIGURATION
28-Lead SSOP
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
AD9224
OTR
(MSB) BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
CLK
(LSB) BIT 12
BIT 11
BIT 10
BIT 7
BIT 8
BIT 9
AVDD
AVSS
SENSE
VREF
REFCOM (AVSS)
CAPB
CAPT
DRVDD
DRVSS
AVDD
AVSS
CML
VINA
VINB
PIN FUNCTION DESCRIPTIONS
Pin
Number Name Description
1 CLK Clock Input Pin
2 BIT 12 Least Significant Data Bit (LSB)
3–12 BIT 11–2 Data Output Bit
13 BIT 1 Most Significant Data Bit (MSB)
14 OTR Out of Range
15, 26 AVDD +5 V Analog Supply
16, 25 AVSS Analog Ground
17 SENSE Reference Select
18 VREF Input Span Select (Reference I/O)
19 REFCOM Reference Common
(AVSS)
20 CAPB Noise Reduction Pin
21 CAPT Noise Reduction Pin
22 CML Common-Mode Level (Midsupply)
23 VINA Analog Input Pin (+)
24 VINB Analog Input Pin (–)
27 DRVSS Digital Output Driver Ground
28 DRVDD +3 V to +5 V Digital Output
Driver Supply
ORDERING GUIDE
Model Temperature Range Package Description Package Option
AD9224ARS –40°C to +85°C 28-Lead Shrink Small Outline (SSOP) RS-28
AD9224-EB Evaluation Board