ADS-919-C/883 데이터 시트보기 (PDF) - DATEL Data Acquisition products

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ADS-919-C/883

14-Bit, 2MHz, Low-Power Sampling A/D Converters

DATEL Data Acquisition products  

THERMAL REQUIREMENTS

All DATEL sampling A/D converters are fully characterized and speci-

fied over operating temperature (case) ranges of 0 to +70°C and –55

to +125°C. All room-temperature (TA = +25°C) production testing is

performed without the use of heat sinks or forced-air cooling. Thermal

impedance figures for each device are listed in their respective specifica-

tion tables.

These devices do not normally require heat sinks, however, standard

precautionary design and layout procedures should be used to ensure

ADS-919

14-Bit, 2MHz, Low-Power Sampling A/D Converters

devices do not overheat. The ground and power planes beneath the package,

as well as all pcb signal runs to and from the device, should be as heavy as

possible to help conduct heat away from the package.

Electrically-insulating, thermally-conductive "pads" may be installed

underneath the package. Devices should be soldered to boards rather than

"socketed," and of course, minimal air flow over the surface can greatly help

reduce the package temperature.

Notes: 1. fs = 2MHz.

2. The ADS-919 is an edge-triggered device. All internal operations

are triggered by the rising edge of the start convert pulse, which

may be as narrow as 20nsec. All production testing is performed

at a 2MHz sampling rate with 200nsec wide start pulses. For

lower sampling rates, wider start pulses may be used, however, a

minimum pulse width low of 20nsec must be maintained.

Figure 4. ADS-919 Timing Diagram

DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com

MDA_ADS-919.C02 Page 5 of 9

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