ADS-118A ETC [List of Unclassifed Manufacturers], ADS-118A Datasheet - Page 6

• Manufacturer Part Number: ADS-118A
• Description: 12-Bit, 5MHz, Low-Power Sampling A/D Converters
• Manufacturer: ETC [List of Unclassifed Manufacturers]

ADS-118/118A
THERMAL REQUIREMENTS
All DATEL sampling A/D converters are fully characterized
and specified over operating temperature (case) ranges of
0 to +70°C and –55 to +125°C. All room temperature
(T
of heat sinks or forced air cooling. Thermal impedance
figures for each device are listed in their respective
specification tables.
These devices do not normally require heat sinks, however,
standard precautionary design and layout procedures should
be used to ensure 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.
A
= +25°C) production testing is performed without the use
–100
–110
–120
–130
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
Figure 6. ADS-118 Histogram and Differential Nonlinearity
0
250
kHz
+0.67
–0.47
(fs = 5MHz, fin = 2.45MHz, Vin = –0.5dB, 4,096-point FFT)
500
kHz
Figure 5. FFT Analysis of ADS-118
0
0
kHz
750
Digital Output Code
Digital Output Code
MHz
1
Frequency
6
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.
In more severe ambient conditions, the package/junction
temperature of a given device can be reduced dramatically
(typically 35%) by using one of DATEL's HS Series heat sinks.
See Ordering Information for the assigned part number. See
page 1-183 of the DATEL Data Acquisition Components
Catalog for more information on the HS Series. Request DATEL
Application Note AN8, "Heat Sinks for DIP Data Converters",
or contact DATEL directly, for additional information.
MHz
1.25
MHz
1.5
4096
MHz
1.75
MHz
2
4096
2.25
MHz
MHz
2.5
®
®