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CA3338 Scheda tecnica(PDF) 8 Page - Renesas Technology Corp

Il numero della parte CA3338
Spiegazioni elettronici  CMOS Video Speed, 8-Bit, 50 MSPS, R2R D/A Converters
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

CA3338 Scheda tecnica(HTML) 8 Page - Renesas Technology Corp

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CA3338, CA3338A
FN1850 Rev 4.00
Page 8 of 10
July 2004
Applications
The output of the CA3338 can be resistively divided to match a
doubly terminated 50
 or 75 line, although peak-to-peak swings
of less than 1V may result. The output magnitude will also vary
with the converter’s output impedance. Figure 5 shows such an
application. Note that because of the HCT input structure, the
CA3338 could be operated up to +7.5V VDD and VREF+ supplies
and still accept 0V to 5V CMOS input voltages.
If larger voltage swings or better accuracy is desired, a high
speed output buffer, such as the HA-5033, HA-2542, or
CA3450, can be employed. Figure 6 shows a typical
application, with the output capable of driving
2V into multiple
50
terminated lines.
Operating and Handling Considerations
HANDLING
All inputs and outputs of CMOS devices have a network for
electrostatic protection during handling. Recommended
handling practices for CMOS devices are described in
AN6525. “Guide to Better Handling and Operation of CMOS
Integrated Circuits.”
OPERATING
OPERATING VOLTAGE
During operation near the maximum supply voltage limit, care
should be taken to avoid or suppress power supply turn-on and
turn-off transients, power supply ripple, or ground noise; any of
these conditions must not cause the absolute maximum ratings
to be exceeded.
INPUT SIGNALS
To prevent damage to the input protection circuit, input signals
should never be greater than VDD nor less than VSS. Input
currents must not exceed 20mA even when the power supply
is off.
UNUSED INPUTS
A connection must be provided at every input terminal. All
unused input terminals must be connected to either VCC or
GND, whichever is appropriate.
TABLE 1. OUTPUT VOLTAGE vs INPUT CODE AND VREF
VREF+
VREF-
STEP SIZE
5.12V
0
0.0200V
5.00V
0
0.0195V
4.608V
0
0.0180V
2.56V
-2.56V
0.0200V
2.50V
-2.50V
0.0195V
Input Code
111111112=FFHEX1
11111102=FEHEX
5.1000V
5.0800
4.9805V
4.9610
4.5900V
4.5720
2.5400V
2.5200
2.4805V
2.4610
100000012=81HEX
100000002=80HEX
011111112=7FHEX
2.5800
2.5600
2.5400
2.5195
2.5000
2.4805
2.3220
2.3040
2.2860
0.0200
0.0000
- 0.0200
0.0195
0.0000
-0.0195
000000012=01HEX
000000002=00HEX
0.0200
0.0000
0.0195
0.0000
0.0180
0.0000
-2.5400
-2.5600
-2.4805
-2.5000


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