® ®
DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508) 339-3000, (800)233-2765 Fax: (508) 339-6356 • Email: sales@datel.com • Internet: www.datel.com
ADC-318, ADC-318A
8-Bit, 120MHz and 140MHz
Full-Flash A/D Converter
FEATURES
• Low power dissipation (960mW max.)
• 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
Figure 1. ADC-318/318A Functional Block Diagram
1 –DVs (Digital) 48 RSET ECL/PECL
2 REF. BOTTOM (VRB) 47 RSET ECL/PECL
3 ANALOG GROUND 46 RSET TTL
4 REF. MID POINT (VRM1) 45 SELECT
5 +AVS (Analog) 44 INV
6 ANALOG IN (VIN) 43 TTL CLOCK OUT
7 REF. MID POINT (VRM2) 42 +DVS2 (Digital)
8 +AVS (Analog) 41 DIGITAL GROUND 2
9 REF. MID POINT (VRM3) 40 A BIT 1 (MSB)
10 ANALOG GROUND 39 A BIT 2
11 REF. TOP (VRT) 38 A BIT 3
12 DIGITAL GROUND 3 37 A BIT 4
13 A/D CLOCK ECL/PECL 36 A BIT 5
14 A/D CLOCK ECL/PECL 35 A BIT 6
15 A/D CLOCK TTL 34 A BIT 7
16 NO CONNECTION 33 A BIT 8 (LSB)
17 NO CONNECTION 32 DIGITAL GROUND 2
18 NO CONNECTION 31 +DVS2 (Digital)
19 +DVS2 (Digital) 30 +DVS1 (Digital)
20 DIGITAL GROUND 2 29 DIGITAL GROUND 1
21 B BIT 8 (LSB) 28 B BIT 1 (MSB)
22 B BIT 7 27 B BIT 2
23 B BIT 6 26 B BIT 3
24 B BIT 5 25 B BIT 4
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION PIN FUNCTION
256
EN
CO
DE
R
CO
MP
AR
AT
OR
SELECT
6
11
9
7
4
2
13
14
15
48
47
46
VIN
VRT
VRM3
VRM2
VRM1
VRB
A/D CLOCK ECL/PECL
A/D CLOCK TTL
RSET ECL/PECL
RSET TTL
RE
SIS
TO
R
MA
TR
IX
6-B
IT
LA
TC
H
AN
D E
NC
OD
ER
6
6
6
6
DELAY
D Q
Q
8 8
6
A
LATCH
B
LATCH
A
TTL
OUTPUT
B
TTL
OUTPUT
TTL
44 INV
33 BIT 8 (LSB)
34 BIT 7
35 BIT 6
36 BIT 5 A OUTPUT
37 BIT 4
38 BIT 3
39 BIT 2
40 BIT 1 (MSB)
21 BIT 8 (LSB)
22 BIT 7
23 BIT 6
24 BIT 5 B OUTPUT
25 BIT 4
26 BIT 3
27 BIT 2
28 BIT 1 (MSB)
43 CLOCK OUT
45 SELECT
A/D CLOCK ECL/PECL
RSET ECL/PECL
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.