ADC
ADC-318, ADC-318A
C
OBSOLETE PRODUCT
FEATURES
8-
Bit,
120MHz and 140MHz
8-Bit,
120
MHz
an
d
140M
Hz
Full-Flash A/D Converter
-
0
n
M
Contact Factory for Replacement Model
Low power dissipation
(960mW
max.)
n
W
TTL compatible output
Diff./Integral nonlinearity (±�½LSB max.)
1:2 Demultiplexed straight output programmable
2:1 Frequency divided TTL clock output with reset
Surface mount package
Selectable Input Logic (TTl, ECL, PECL)
+5V or ±5V Power Supply Operation
INPUT/OUTPUT CONNECTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
FUNCTION
–DVs (Digital)
REF. BOTTOM (V
RB
)
ANALOG GROUND
REF. MID POINT (V
RM1
)
+AV
S
(Analog)
ANALOG IN (V
IN
)
REF. MID POINT (V
RM2
)
+AV
S
(Analog)
REF. MID POINT (V
RM3
)
ANALOG GROUND
REF. TOP (V
RT
)
DIGITAL GROUND 3
A/D CLOCK ECL/PECL
A/D CLOCK ECL/PECL
A/D CLOCK TTL
NO CONNECTION
NO CONNECTION
NO CONNECTION
+DV
S
2 (Digital)
DIGITAL GROUND 2
B BIT 8 (LSB)
B BIT 7
B BIT 6
B BIT 5
PIN
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
FUNCTION
RSET ECL/PECL
RSET ECL/PECL
RSET TTL
SELECT
INV
TTL CLOCK OUT
+DV
S
2 (Digital)
DIGITAL GROUND 2
A BIT 1 (MSB)
A BIT 2
A BIT 3
A BIT 4
A BIT 5
A BIT 6
A BIT 7
A BIT 8 (LSB)
DIGITAL GROUND 2
+DV
S
2 (Digital)
+DV
S
1 (Digital)
DIGITAL GROUND 1
B BIT 1 (MSB)
B BIT 2
B BIT 3
B BIT 4
GENERAL DESCRIPTION
The ADC-318 and ADC-318A are 8 bit monolithic bipolar,
full flash A/D converters. Though they have high, 120MHz
(ADC-318) and 140MHz (ADC-318A), sampling rates, their
input logic level, including the start convert pulse, is TTL,
ECL and PECL compatible. Digital outputs are also TTL
compatible and allow a straight output or a programmable
1:2 de-multiplexed output.
The ADC-318 and ADC-318A feature ±1/2 LSB max.
integral and differential non-linearity, +5V single or ±5V dual
power supply operation, a low 960mW maximum power
dissipation, 150MHz wide analog input range and excellent
temperature coefficient in a small 48 pin QFP package. The
start convert pulse can have a 50% duty cycle.
The ADC-318 and ADC-318A offer low cost, easy to use
functionality for design engineers.
V
IN
6
44 INV
33 BIT 8 (LSB)
V
RT
11
6
A
TTL
OUTPUT
34 BIT 7
35 BIT 6
8
A
LATCH
8
36 BIT 5 A OUTPUT
37 BIT 4
38 BIT 3
V
RM3
9
6
6-BIT LATCH
AND ENCODER
COMPARATOR
RESISTOR
MATRIX
ENCODER
39 BIT 2
40 BIT 1 (MSB)
V
RM2
7
256
6
21 BIT 8 (LSB)
22 BIT 7
V
RM1
4
B
LATCH
V
RB
2
6
6
B
TTL
OUTPUT
23 BIT 6
24 BIT 5 B OUTPUT
25 BIT 4
26 BIT 3
27 BIT 2
28 BIT 1 (MSB)
A/D CLOCK ECL/PECL 13
A/D CLOCK ECL/PECL 14
A/D CLOCK TTL 15
DELAY
D
Q
Q
SELECT
43 CLOCK OUT
TTL
45 SELECT
RSET ECL/PECL 48
RSET ECL/PECL 47
For full details go to
www.murata-ps.com/rohs
RSET TTL 46
Figure 1. ADC-318/318A Functional Block Diagram
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDA_ADC-318.B01
Page 1 of 8
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
