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CA3304 Datasheet(PDF) 4 Page - Intersil Corporation

Part No. CA3304
Description  4-Bit, 25 MSPS, Flash A/D Converters
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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 4 page
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4
Pin Descriptions
PIN NUMBER
NAME
DESCRIPTION
1
Bit 1
Bit 1 (LSB).
Output Data Bits
(High = True)
2Bit 2
Bit 2.
3Bit 3
Bit 3.
4
Bit 4
Bit 4 (MSB).
5
DC
Data Change.
6
OF
Overflow.
7
CE2
Three-State Output Enable Input, active low. See the Chip Enable Truth Table.
8VSS
Digital Ground.
9CE1
Three-State Output Enable Input, active high. See the Chip Enable Truth Table.
10
VAA+
Analog Power Supply, +5V.
11
VIN
Analog Signal Input.
12
VREF+
Reference Voltage Positive Input.
13
VREF-
Reference Voltage Negative Input.
14
VAA-
Analog Ground.
15
CLK
Clock Input.
16
VDD
Digital Power Supply, +5V.
CHIP ENABLE TRUTH TABLE
CE1
CE2
BIT 1 - BIT 4
DC, OF
0
1
Valid
Valid
1
1
Three-State
Valid
X
0
Three-State
Three-State
X = Don't Care
TABLE 1. OUTPUT CODE TABLE
CODE
DESCRIPTION
INPUT VOLTAGE (V)
OUTPUT CODE
DECIMAL
COUNT
VREF+ = 1V
VREF- = -1V
1.6V
0V
2V
0V
3.2V
0V
4.8V
0V
OF
B4
B3
B2
B1
Zero
-1.000
0
0
0
0
0
0000
0
1 LSB
-0.875
0.1
0.125
0.2
0.3
0
0001
1
2 LSB
-0.750
0.2
0.250
0.4
0.6
0
0010
2
•••••
•••••
•••••
•••••
1/
2 Full Scale -1 LSB
-0.125
0.7
0.875
1.4
2.1
0
0111
7
1/
2 Full Scale
0
0.8
1.000
1.6
2.4
0
1000
8
1/
2 Full Scale +1 LSB
0.125
0.9
1.125
1.8
2.7
0
1001
9
•••••
•••••
•••••
•••••
Full Scale -1 LSB
0.750
1.4
1.750
2.8
4.2
0
1110
14
Full Scale
0.875
1.5
1.875
3.0
4.5
0
1111
15
Overflow
1.000
1.6
2.000
3.2
4.8
1
1111
31
Step Size
0.125
0.1
0.125
0.2
0.3
NOTE:
1. The voltages listed are the ideal centers of each output code shown as a function of its associated reference voltage See Ideal Transfer
Curve Figure 6. The output code should exist for an input equal to the ideal center voltage
±1/2 of the step size.
CA3304, CA3304A




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