ad7883br Analog Devices, Inc., ad7883br Datasheet - Page 4

• Manufacturer Part Number: ad7883br
• Description: Lc2mos 12-bit, 3.3 V Sampling Adc
• Manufacturer: Analog Devices, Inc.

AD7883
ABSOLUTE MAXIMUM RATINGS*
V
V
AGND to DGND . . . . . . . . . . . . . . . . –0.3 V to V
V
V
V
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to V
Digital Outputs to DGND . . . . . . . . . . –0.3 V to V
Operating Temperature Range
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . +300 C
Power Dissipation (Any Package) to +75 C . . . . . . . 450 mW
Derates above +75 C by . . . . . . . . . . . . . . . . . . . . 10 mW/ C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
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 AD7883 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.
Pin
No.
11
12
13
14
15
16
17
18
19
10
11 . . . 22 DB0–DB11
23
24
permanent damage to the device. This is a stress rating only and 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.
DD
DD
INA
INA
REF
Industrial (B Version) . . . . . . . . . . . . . . . . –40 C to +85 C
Storage Temperature Range . . . . . . . . . . . –65 C to +150 C
, V
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
to DGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
to AGND (Figure 5) . . . . . . –V
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to V
INB
to AGND (Figure 4) . . . . . –0.3 V to V
Pin
Mnemonic
V
V
AGND
V
CS
CONVST
RD
BUSY
CLKIN
DGND
MODE
V
INA
INB
REF
DD
Analog Input.
Analog Input.
Analog Ground.
Voltage Reference Input. This is normally tied to V
Chip Select. Active Low Logic input. The device is selected when this input is active.
Convert Start. A low to high transition on this input puts the track/hold into hold mode and starts
conversion. This input is asynchronous to the CLKIN and is independent of CS and RD.
Read. Active Low Logic Input. This input is used in conjunction with CS low to enable data outputs.
Active Low Logic Output. This status line indicates converter status. BUSY is low during conversion.
Clock Input. TTL-compatible logic input. Used as the clock source for the A/D converter. The mark/
space ratio of the clock can vary from 40/60 to 60/40.
Digital Ground.
Three-State Data Outputs. These become active when CS and RD are brought low.
MODE Input. This input is used to put the device into the power save mode (MODE = 0 V). During
normal operation, the MODE input will be a logic high (MODE = V
Power Supply. This is nominally +3.3 V.
Function
DD
–0.3 V to V
PIN FUNCTION DESCRIPTION
DD
DD
DD
DD
DD
+ 0.3 V
+ 0.3 V
+ 0.3 V
+ 0.3 V
+ 0.3 V
DD
–4–
DD.
CONVST
CLKIN
AGND
DGND
BUSY
V
PIN CONFIGURATION
V
V
DB0
DB1
REF
INA
RD
INB
CS
10
12
11
1
2
3
4
5
6
7
8
9
DD
(Not to Scale)
).
AD7883
TOP VIEW
WARNING!
23
19
18
17
16
15
24
22
21
20
14
13
V
MODE
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DD
ESD SENSITIVE DEVICE
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