AD775
PIN DESCRIPTION
Pin No.
1
2, 24
3
4–9
10
11, 13
12
16
17
23
22
14, 15, 18
19
20, 21
Symbol
OE
DV
SS
D0 (LSB)
D1–D6
D7 (MSB)
DV
DD
CLK
V
RTS
V
RT
V
RB
V
RBS
AV
DD
V
IN
AV
SS
Type Name and Function
DI
P
DO
DO
DO
P
DI
AI
AI
AI
AI
P
AI
P
OE
= Low
OE
= High
Normal Operating Mode.
High Impedance Outputs.
Digital Ground. Note: DV
SS
and AV
SS
pins should share a common ground plane on the circuit board.
Least Significant Bit, Data Bit 0.
Data Bits 1 Through 6.
Most Significant Bit, Data Bit 7.
+5 V Digital Supply. Note: DV
DD
and AV
DD
pins should share a common supply on the circuit board.
Clock Input.
Reference Top Bias. Short to V
RT
for Self-Bias.
Reference Ladder Top.
Reference Ladder Bottom.
Reference Bottom Bias. Short to V
RB
for Self-Bias.
+5 V Analog Supply. Note: DV
DD
and AV
DD
pins should share a common supply within 0.5 inches
of the AD775.
Analog Input. Input Span = V
RT
–V
RB
.
Analog Ground. Note: DV
SS
and AV
SS
pins should share a common ground within 0.5 inches of the
AD775.
NOTE
Type: AI = Analog Input; DI = Digital Input; DO = Digital Output; P = Power.
PIN CONFIGURATION
(DIP and SOIC)
MAXIMUM RATINGS*
Supply Voltage (AV
DD
, DV
DD
) . . . . . . . . . . . . . . . . . . . . 7 V
Supply Difference (AV
DD
–DV
DD
) . . . . . . . . . . . . . . . . . . 0 V
Ground Difference (AV
SS
–DV
SS
) . . . . . . . . . . . . . . . . . . . 0 V
Reference Voltage (V
RT
, V
RB
) . . . . . . . . . . . . . . . . V
DD
to V
SS
Analog Input Voltage (V
IN
) . . . . . . . . . . . . . . . . . . V
DD
to V
SS
Digital Input Voltage (CLK) . . . . . . . . . . . . . . . . . V
DD
to V
SS
Digital Output Voltage (V
OH
, V
OL
) . . . . . . . . . . . . V
DD
to V
SS
Storage Temperature . . . . . . . . . . . . . . . . . . –55°C to +150°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
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 indicated in the
operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ORDERING GUIDE
Temperature
Range
Package
Description
Package
Option
Model
AD775JN –20°C to +75°C 24-Pin 400 Mil Plastic DIP N-24B
AD775JR –20°C to +75°C 24-Pin 300 Mil SOIC
R-24A
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 AD775 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
–4–
REV. 0
AD [ ANALOG DEVICES ]
