MC1508-8 Philips Semiconductors, MC1508-8 Datasheet - Page 6

• Manufacturer Part Number: MC1508-8
• Description: (MC1508-8 / MC1408-8) 8-Bit Multiplying D/A Converter
• Manufacturer: Philips Semiconductors

Philips Semiconductors Linear Products
August 31, 1994
8-bit multiplying D/A converter
e
IN
DIGITAL
INPUTS
51
A
A
A
A
A
A
A
A
V
(+)
1
2
3
4
5
6
7
8
I
10
12
11
0.1 F
5
6
7
8
9
10
12
0.1 F
11
10
12
11
5
6
7
8
9
I
5
6
7
8
9
I
I
EE
MC1508
MC1408
MC1508
MC1408
V
V
MC1508
MC1408
V
CC
V
V
EE
CC
V
EE
CC
3
13
13
EE
3
13
3
I
CC
14
15
1
2
4
16
14
15
16
15pF
1
2
4
14
15
16
1
2
4
(SEE TEXT FOR VALUES OF C.)
I
TYPICAL VALUES R
14
1k
I
15pF
15
1.0k
1.0k
Figure 6. Reference Current Slew Rate Measurement
I
R
O
R
14
Figure 4. Transient Response and Settling Time
15
+2V
1k
R
DC
L
C
R
R
R
O
= 50
L
V
14
L
REF
e
V
25pF
V
V
OUTPUT
O
C = 15pF
REF(+)
14
Figure 5. Notation Definitions
REF
O
0.1 F
FOR SETTLING TIME
MEASUREMENT
(ALL BITS
SWITCHED LOW
TO HIGH)
= R
= +2.0V
SCOPE
15
= 1k
742
I
THE RESISTOR TIED TO PIN 15 IS TO TEMPERATURE COMPENSATE THE
BIAS CURRENT AND MAY NOT BE NECESSARY FOR ALL APPLICATIONS
O
V
where K
and A
I
AND I
A
K
SETTLING TIME
N
N
TRANSIENT
RESPONSE
dI
dt
I
= “1” IF A
= “0” IF A
APPLY TO INPUTS A
e
IN
A 1
2
V REF
R 14
R L
I
–100
2.4V
0.4V
1.0V
N
N
SLEWING TIME
mV
dV
A 2
dt
IS AT HIGH LEVEL
IS AT LOW LEVEL
4
0
0
10%
A 3
90%
8
t
1
PHL
t
S
THROUGH A
= 70ns TYPICAL
TO 1/2LSB
A 4
16
= t
t
PLH
PLH
MC1508-8/1408-8
A 5
= 10ns
32
8
0
2.0mA
A 6
64
Product specification
1.4V
t
128
R
PIN 4 TO GND
A 7
PHL
FOR TURN OFF
MEASUREMENT
USE R
R
L
L
= 50
= 500
L
256
A 8
to GND