Datasheet

AD9258
Rev. A | Page 12 of 44
ABSOLUTE MAXIMUM RATINGS
Table 6.
Parameter Rating
ELECTRICAL
1
AVDD to AGND −0.3 V to +2.0 V
DRVDD to AGND −0.3 V to +2.0V
VIN+A/VIN+B, VIN−A/VIN−B to AGND −0.3 V to AVDD + 0.2 V
CLK+, CLK− to AGND −0.3 V to AVDD + 0.2 V
SYNC to AGND −0.3 V to AVDD + 0.2 V
VREF to AGND −0.3 V to AVDD + 0.2 V
SENSE to AGND −0.3 V to AVDD + 0.2 V
VCM to AGND −0.3 V to AVDD + 0.2 V
RBIAS to AGND −0.3 V to AVDD + 0.2 V
CSB to AGND −0.3 V to DRVDD + 0.2 V
SCLK/DFS to AGND −0.3 V to DRVDD + 0.2 V
SDIO/DCS to AGND −0.3 V to DRVDD + 0.2 V
OEB −0.3 V to DRVDD + 0.2 V
PDWN −0.3 V to DRVDD + 0.2 V
D0A/D0B through D13A/D13B to
AGND
−0.3 V to DRVDD + 0.2 V
DCOA/DCOB to AGND −0.3 V to DRVDD + 0.2 V
ENVIRONMENTAL
Operating Temperature Range
(Ambient)
−40°C to +85°C
Maximum Junction Temperature
Under Bias
150°C
Storage Temperature Range
(Ambient)
−65°C to +150°C
1
The inputs and outputs are rated to the supply voltage (AVDD or DRVDD) +
0.2 V but should not exceed 2.1 V.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent 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.
THERMAL CHARACTERISTICS
The exposed paddle must be soldered to the ground plane for
the LFCSP package. Soldering the exposed paddle to the PCB
increases the reliability of the solder joints and maximizes the
thermal capability of the package.
Typical θ
JA
is specified for a 4-layer PCB with a solid ground
plane. As shown in Table 7, airflow improves heat dissipation,
which reduces θ
JA
. In addition, metal in direct contact with the
package leads from metal traces, through holes, ground, and
power planes, reduces θ
JA
.
Table 7. Thermal Resistance
Package Type
Airflow
Velocity
(m/sec) θ
JA
1, 2
θ
JC
1, 3
θ
JB
1, 4
Unit
64-Lead LFCSP
(CP-64-6)
0 18.5 1.0 °C/W
1.0 16.1 9.2 °C/W
2.5 14.5 °C/W
1
Per JEDEC 51-7, plus JEDEC 25-5 2S2P test board.
2 Per JEDEC JESD51-2 (still air) or JEDEC JESD51-6 (moving air).
3 Per MIL-Std 883, Method 1012.1.
4 Per JEDEC JESD51-8 (still air).
ESD CAUTION