AD7738_15 Datasheet, PDF (6/28 Pages) Analog Devices – 8-Channel, High Throughput, 24-Bit ADC

AD7738
ABSOLUTE MAXIMUM RATINGS*
(T_A = 25؇C unless otherwise noted.)
AV_DD to AGND, DV_DD to DGND . . . . . . . . . –0.3 V to +7 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
AV_DD to DV_DD . . . . . . . . . . . . . . . . . . . . . . . . . . –5 V to +5 V
AIN, AINCOM to AGND . . . . . . . . . –0.3 V to AV_DD + 0.3 V
REFIN(+), REFIN(–) to AGND . . . . . –0.3 V to AV_DD + 0.3 V
MUXOUT(+) to AGND . . . . . . . . . . . –0.3 V to AV_DD + 0.3 V
MUXOUT(–) to AGND . . . . . . . . . . . –0.3 V to AV_DD + 0.3 V
ADCIN(+), ADCIN(–) to AGND . . . . –0.3 V to AV_DD + 0.3 V
P1 Voltage to AGND . . . . . . . . . . . . . . –0.3 V to AV_DD + 0.3 V
Digital Input Voltage to DGND . . . . . –0.3 V to AV_DD + 0.3 V
Digital Output Voltage to DGND . . . . –0.3 V to AV_DD + 0.3 V
Operating Temperature Range . . . . . . . . . . –40؇C to +105؇C
Storage Temperature Range . . . . . . . . . . . . –65؇C to +150؇C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150؇C
TSSOP Package, Power Dissipation . . . . . . . . . . . . . 660 mW
␪_JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 97.9؇C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215؇C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220؇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
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Model
AD7738BRU
ORDERING GUIDE
Temperature
Range
–40؇C to +105؇C
Package
Description
TSSOP 28
Package
Options
RU-28
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
AD7738 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.
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AINCOM/P0
SYNC/P1
MUXOUT ADCIN
REFIN– REFIN+
REFERENCE
DETECT
BUFFER
MUX
24-BIT
⌺-⌬ ADC
AD7738
CALIBRATION
CIRCUITRY
AV_DD
I/O PORT
CLOCK
GENERATOR
DV_DD
SERIAL
INTERFACE
CS
SCLK
DOUT
DIN
CONTROL
LOGIC
RDY
RESET
AGND AV_DD MCLKOUT MCLKIN
DGND DV_DD
Figure 4. Block Diagram
–6–
REV. 0