AD9257 Analog Devices, AD9257 Datasheet - Page 8

• Manufacturer Part Number: AD9257
• Description: Octal, 14-Bit, 40/65 MSPS Serial LVDS 1.8 V A/D Converter
• Manufacturer: Analog Devices

AD9257
ABSOLUTE MAXIMUM RATINGS
Table 6.
Parameter
Electrical
Environmental
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.
DRVDD to AGND
Digital Outputs
CLK+, CLK− to AGND
VIN+ x, VIN− x to AGND
SCLK/DTP, SDIO/DFS, CSB to AGND
SYNC, PDWN to AGND
RBIAS to AGND
VREF, SENSE to AGND
Operating Temperature Range (Ambient)
Maximum Junction Temperature
Lead Temperature (Soldering, 10 sec)
Storage Temperature Range (Ambient)
AVDD to AGND
(D± x, DCO+, DCO−, FCO+, FCO−) to
AGND
Rating
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−40°C to +85°C
150°C
300°C
−65°C to +150°C
Rev. 0 | Page 8 of 40
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.
Table 7. Thermal Resistance
Package Type
64-Lead LFCSP
9 mm × 9 mm
(CP-64-4)
1
2
3
4
Typical θ
plane. As shown Table 7, airflow improves heat dissipation,
which reduces θ
package leads from metal traces, through holes, ground, and
power planes reduces θ
ESD CAUTION
Per JEDEC JESD51-2 (still air) or JEDEC JESD51-6 (moving air).
Per MIL-Std 883, Method 1012.1.
Per JEDEC JESD51-8 (still air).
Per JEDEC 51-7, plus JEDEC 25-5 2S2P test board.
JA
is specified for a 4-layer PCB with a solid ground
JA
Airflow
Velocity
(m/sec)
0
1.0
2.5
. In addition, metal in direct contact with the
JA
.
θ
22.3
19.5
17.5
JA
1, 2
θ
1.4
N/A
N/A
JC
1, 3
θ
N/A
11.8
N/A
JB
1, 4
Data Sheet
Ψ
0.1
0.2
0.2
JT
1, 2
Unit
°C/W
°C/W
°C/W