AD9528 datasheet(48/68 Pages) AD

tên linh kiện	AD9528

Giải thích chi tiết về linh kiện	Maximum output frequency

PDF	68 Pages

Scroll/Zoom	100%

nhà sản xuất	AD [Analog Devices]

Trang chủ	http://www.analog.com

Logo

48 / 68 page

Data Sheet

AD9528

Rev. C | Page 47 of 67

The second step in evaluating the operating conditions is to

multiply the power dissipated by the thermal impedance to

determine the maximum power gradient. For this example, a

thermal impedance of θJA = 21.1°C/W was used.

Example 1

(1358 mW × 21.1°C/W) = 29°C

With an ambient temperature of 85°C, the junction temperature is

TJ = 85°C + 29°C = 114°C

This junction temperature is below the maximum allowable.

Example 2

(1630 mW × 21.1°C/W) = 34°C

With an ambient temperature of 85°C, the junction temperature is

TJ = 85°C + 34°C = 119°C

This junction temperature is greater than the maximum

allowable. The ambient temperature must be lowered by 4°C to

operate in the condition of Example 2.

THERMALLY ENHANCED PACKAGE MOUNTING

GUIDELINES

See the AN-772 Application Note, A Design and Manufacturing

Guide for the Lead Frame Chip Scale Package (LFCSP), for more

information about mounting devices with an exposed paddle.

AD9528 bảng dữ liệu(PDF) 48 Page - Analog Devices