CA3338 Intersil Corporation, CA3338 Datasheet - Page 7

• Manufacturer Part Number: CA3338
• Description: CMOS Video Speed/ 8-Bit/ 50 MSPS/ R2R D/A Converters
• Manufacturer: Intersil Corporation

Input Code
111111112 = FF
111111102 = FE-
HEX
10000001
10000000
01111111
00000001
00000000
NOTES:
Applications
The output of the CA3338 can be resistively divided to match a
doubly terminated 50
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 V
V
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 applica-
tion, with the output capable of driving 2V into multiple 50
terminated lines.
CLOCK
8 DATA
1. Both V
2. Keep nodal capacitance at CA3450 pin 3 as
3. V
REF
STEP SIZE
BITS
TABLE 1. OUTPUT VOLTAGE vs INPUT CODE AND V
+5V
bypassed within
low as possible.
V
V
OUT
+ supplies and still accept 0V to 5V CMOS input voltages.
REF
REF
•
•
•
•
•
•
2
2
2
2
2
+
= 81
= 80
= 7F
= 01
= 00
Range = 3V at CA3450.
REF
+
-
4.7 F
HEX
HEX
HEX
HEX
TAN
HEX
HEX
+ pin and 392 resistor should be
0.1 F
CER.
0.0200V
5.1000V
5.0800
2.5800
2.5600
2.5400
0.0200
0.0000
1-7, 9
1
5.12V
/
4
0
inch.
15
16
14
or 75
8
FIGURE 6. CA3338 AND CA3450 FOR DRIVING MULTIPLE COAXIAL LINES
0.0195V
4.9805V
LE
D0 - D7
V
COMP
V
4.9610
2.5195
2.5000
2.4805
0.0195
0.0000
5.00V
DD
SS
CA3338
0
V
line, although peak-to-peak
V
V
REF
REF
OUT
V
0.0180V
4.5900V
EE
4.608V
4.5720
2.3220
2.3040
2.2860
0.0180
0.0000
+
-
0
12
13
11
10
0.0200V
2.5400V
- 0.0200
-2.5400
-2.5600
2.5200
0.0200
0.0000
-2.56V
2.56V
+
CA3338, CA3338A
+3.00V AT 25mA
DD
REF
1k
0.0195V
2.4805V
-0.0195
-2.4805
-2.5000
2.4610
0.0195
0.0000
-2.50V
2.50V
and
10-17
392
1%
ADJUST
10k
OFFSET
Operating and Handling Considerations
HANDLING
OPERATING
Operating Voltage
All inputs and outputs of CMOS devices have a network
for electrostatic protection during handling. Recom-
mended handling practices for CMOS devices are
described in AN6525. “Guide to Better Handling and
Operation of CMOS Integrated Circuits.”
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 V
V
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 V
or GND, whichever is appropriate.
SS
14
392
1%
3
7, 8
. Input currents must not exceed 20mA even when
+6V
-6V
+
CA3450
-
4, 5, 12, 13
4.7 F TAN
9
11
+
+
5pF
0.1 F CER.
6
0.1 F
CER.
4.7 F
TAN
R
R
V
OUT
UP TO 5 OUTPUT LINES
FOR R = 75 , 3 LINES
FOR R = 50
= 1.5V
PEAK
DD
nor less than
R
R
V
V
OUT
OUT
CC
1
N