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PDF ( 数据手册 , 数据表 ) ADC-318A

零件编号 ADC-318A
描述 8-Bit/ 120MHz and 140MHz Full-Flash A/D Converter
制造商 ETC
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ADC-318A 数据手册, 描述, 功能
®®
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
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.
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 –DVs (Digital)
48
2 REF. BOTTOM (VRB)
47
3 ANALOG GROUND
46
4 REF. MID POINT (VRM1) 45
5 +AVS (Analog)
44
6 ANALOG IN (VIN)
43
7 REF. MID POINT (VRM2) 42
8 +AVS (Analog)
41
9 REF. MID POINT (VRM3) 40
10 ANALOG GROUND
39
11 REF. TOP (VRT)
38
12 DIGITAL GROUND 3
37
13 A/D CLOCK ECL/PECL 36
14 A/D CLOCK ECL/PECL 35
15 A/D CLOCK TTL
34
16 NO CONNECTION
33
17 NO CONNECTION
32
18 NO CONNECTION
31
19 +DVS2 (Digital)
30
20 DIGITAL GROUND 2
29
21 B BIT 8 (LSB)
28
22 B BIT 7
27
23 B BIT 6
26
24 B BIT 5
25
RSET ECL/PECL
RSET ECL/PECL
RSET TTL
SELECT
INV
TTL CLOCK OUT
+DVS2 (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
+DVS2 (Digital)
+DVS1 (Digital)
DIGITAL GROUND 1
B BIT 1 (MSB)
B BIT 2
B BIT 3
B BIT 4
VIN 6
VRT 11
VRM3 9
VRM2 7
VRM1 4
VRB 2
A/D CLOCK ECL/PECL 13
A/D CLOCK ECL/PECL 14
A/D CLOCK TTL 15
RSET ECL/PECL 48
RSET ECL/PECL 47
RSET TTL 46
6
6
256
6
6
DELAY
DQ
Q
8
A
LATCH
8
A
TTL
OUTPUT
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)
B
LATCH
6
B
TTL
OUTPUT
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)
SELECT
43 CLOCK OUT
TTL
45 SELECT
Figure 1. ADC-318/318A Functional Block Diagram
DATEL, Inc., Mansfield, MA 02048 (USA) Tel: (508) 339-3000, (800)233-2765 Fax: (508) 339-6356 Email: [email protected] Internet: www.datel.com







ADC-318A pdf, 数据表
ADC-318, ADC-318A
®®
Fig. 4-1:
Supply Current vs. Temperature
170
160
ADC-318A
150
ADC-318
140
130
–25 25
75
TA –Ambient Temperature (°C)
Fig. 4-5:
SNR+THD vs. Input Signal Frequency
50
40
ADC-318: FC=120MHz
ADC-318A: FC=140MHz
30
20
1
3 5 10 30 50
Input Frequency (MHz)
Figure 6: Typical Performance Curve
Fig. 4-2:
Supply Current vs. Conversion Rate
170
ADC-318A
160
ADC-318
150
140
Fig. 4-3:
Reference Current vs.Temperature
20
15
Fig. 4-4:
Error Rate vs. Conversion Rate
ADC-318 ADC-318A
10-6
10-7
10-8
fin = Fc/4–1KHz
Error> 16LSB
10-9
130 10 10-10
0 50 100
Conversion Rate (MHz)
140
–25 25
75
TA –Ambient Temperature (°C)
140 160 180
Conversion Rate (MHz)
Fig. 4-6:
Allowable Ambient Temperature vs. Air Flow
°C
90
Four-layer board
80
Double-layer board
70
Single-layer board
60
01
2 3 m/s
Fig. 4-7:
Analog Input Current vs.Voltage Inputs
200
VRT = +4V
VRB = +2V
100
0
23
VIN Pin Voltage (V)
4
Fig. 4-8:
Maximum Conversion Rate vs.Temperature
170
160
ADC-318A
150
140
ADC-318
130
–25 25
75
TA –Ambient Temperature (°C)
Fig. 4-9: Sine Wave Curvefit Test
1.0000 Sine Wave Curvefit Test
(256)
0.5000
(192)
0.0000
(128)
–0.500
(64)
8
7
6
5
4
3
2
1
0
–1
–2 S/N Ratio 48.7dB
–3 7.8 Effective Bits
–4
–5 Conditions
–6 Sampling Frequency 120MHz
–7 Signal Frequency 996kHz
–8 4096 Points
36
37
.602±.016
(15.3)
+.016
.472 –.004
(12.0)
MECHANICAL DIMENSIONS INCES (MM)
25
24
+.014
0.087 –.006
(2.2)
0.035 ±.008
(0.9)
+.008
0.004 –.004
(0.1)
.531
(13.5)
+.004
0.006 –.002
(0.15)
48
1
0.031
(0.8)
13
12
+.006
0.012 –.004
(0.3)
ORDERING INFORMATION
ADC-318
ADC-318A
8-bit, 120MHz Flash A/D
8-bit, 140MHz Flash A/D
ISO 9001
REGISTERED
DS-0358 5/98
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Internet: www.datel.com Email: [email protected]
Data sheet fax back: (508) 261-2857
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01
DATEL GmbH Munchen, Germany Tel: 89-544334-0
DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025
DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein
do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.














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