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FUJITSU SEMICONDUCTOR DATA SHEET
DS04-28202-6E
ASSP
1 CHANNEL 8-BIT VIDEO A/D CONVERTER
MB40578
s DESCRIPTION
The Fujitsu MB40578 is a low power ultra-high speed video A/D converter fabricated with Fujitsu Advanced Bipolar Technology. The MB40578 also adopts the fully-parallel comparison technique (flash method) for high speed convertion and can convert wide band analog signal such as video signal to digital signal at a sampling rate of DC through 20 Mega-samples/sec. Because of such high-speed poeration, the MB40578 is suitable for digital video applications such as the digital TV, video processing with computer, or radar signal processing.
s FEATURES
* * * * * * * * Resolution: Linearity error: Maximum conversion rate: Analog input voltage: Digital I/O level: Single power supply: Power Dissipation: Package: 8 bits 0.2% max. (MB40578) 20 MSPS min. 3.0V to 5.0V TTL compatible +5V 480mW typ. Standard 22-pin DIP Package: Suffix: -P
s PACKAGE
Plastic DIP 22 pin ,
(DIP-22P-M04)
MB40578
s PIN ASSIGNMENT
D.GND (LSB)D8 D7 D6 D5 D4 D3 D2 (MSB)D1 CLK D.GND
1 2 3 4 5
22 21 20 19 18
A.GND VCCD VCCA VRB VINA VINA VRM VRT VCCA VCCD A.GND
6 TOP VIEW 17 7 8 9 10 11 16 15 14 13 12
2
MB40578
s BLOCK DIAGRAM
V CCA
14 20
V CCD
13 21
CLK V INA V RT
10 17 18 15
R1 1 R 2 R 127 R/2 V RM
16 7 9
D1(MSB)
8
D2
D3
255 to 8 ENCODER
LATCH & BUFFER
5 6
D4
D5
R/2
128
4
D6
3
D7
R
254
2
D8(LSB)
R
255
R2 V RB
19 12 22 1 11
A.GND
D. GND
3
MB40578
s ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage Digital input voltage Analog input voltage Analog reference voltage Storage temperature Symbol VCCA VCCD VIND VINA VRT, VRB VSTG Rating -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC+0.5 -0.5 to VCC+0.5 -55 to +125 Unit V V V V C
Note: Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation should be restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
s RECOMMENDED OPERATING CONDITIONS
Parameter Power supply voltage*1 Analog input voltage*2 Analog reference voltage (Top side)*2 Analog reference voltage (Bottom side)* Digital high-level output current Digital low-level output current Clock pulse width at high level Clock pulse width at low level Operating temperature
2
Symbol VCCA VCCD VINA VRT VRB IOHD IOLD tW+ tW- Ta
Value Min 4.75 3 -- 2.9 -400 -- 25 25 0 Typ 5.00 -- 5 3 -- -- -- -- -- Max 5.25 5 5.1 -- -- 4 -- -- 70
Unit V V V V A mA ns ns C
Notes: *1: Please keep VCCA and VCCD at the same potential. *2: VRB < VINA < VRT, VRT - VRB = 2V + 0.1V.
4
MB40578
s ELECTRICAL CHARACTERISTICS
1. Analog DC Characteristics
(VCCA = VCCD = 5V 5%, Ta = 0 to 70C) Value Unit Min Typ Max -- LE RINA CINA IIHA IILA IRB VRT = 5V VRB = 3V DC -- 50 -- -- -- -15 -- -- -- 120 -- -- -9 8 0.2 -- 230 150 145 -- bits % k pF A A mA
Parameter Resolution Linearity error Equivalent resistance for analog input Analog input capacitance Analog high-level input current Analog low-level input current Reference current
Symbol
Condition
2. Digital DC Characteristics
(VCCA = VCCD = 5V 5%, Ta = 0 to 70C) Value Unit Min Typ Max 2.7 -- 2 -- VID = 7V VIHD = 2.7V VILD = 0.4V -- -- -400 -- -- -- -- -- -- 0 -40 92 -- 0.4 -- 0.8 100 20 -- 160 V V V V A A A mA
Parameter High-level output voltage Low-level output voltage High-level input voltage Low-level input voltage Maximum input current High-level input current Low level input current Power supply current
Symbol VOH VOL VIHD VILD IID IIHD IILD ICC
Condition IOH = -400 A IOL = 1.6 mA
5
MB40578
3. Switching Characteristics
(VCCA = VCCD = 5V 5%, Ta = 0 to 70C) Value Unit Min Typ Max 20 5 30 15 -- 40 MSPS ns
Parameter Maximum conversion rate Digital output delay time
Symbol FS tpd
Condition
Figure 1
Timing Diagram
t W+ 3V CLK 0V Sample N V INA Sample N+1 1.5 V
t W-
1.5 V Sample N+2
3V D1 to D8 0V tpd Data N-1 Data N 1.5 V Data N+1
6
MB40578
Figure 2 Analog Input Equivalent Circuit
V CCA V INA V INA C INA R INA I BIAS V CCA VD
A.GND
A.GND
V RB
X255 Circuits
CINA: Non-linear Emitter-follower Junction Capacitance RINA: Linear Resistance Model for Input Current Transition by Comparator Switching: Infinite value for VIN < VRB or when CLK = High VRB: Voltage at VRB terminal IBIAS: Constant Input Bias Current VD: The base-collector junction diode of emitter-follower transistor.
Figure 3 Digital Input Equivalent
Figure 4 Load Circuit for Output Buffer
V CCA 25 k 3.1 k 25 k
Measurement point
V CCD
RL 2.1 k To Output pin
CL
Input
V REF=1.4 V
D.GND A.GND Note RL = 2 k CL = 15 pF including scope and jig capacitance Diodes:IN3064 or equivalent
7
MB40578
Figure 5 Output Code
(V CC=5.0 V,V RT=5.0 V,V RB=3.0 V) Step 0 1 Analog Input Voltage 2.960 V 2.968 V OUTPUT VOLTAGE(V) 00000000 00000001
127 128 129
3.976 V 3.984 V 3.992 V
01111111 10000000 10000001
245 255
4.992 V 5.000 V
1111110 11111111
Note : Ajust V ZT=2.964 V and V FT=4.996 V with V RT and V RB.The Analog Input Voltage are the center values of each step.
Figure 6 Ideal Conversion Characteristics
Figure 7 Actual Conversion Characteristics
STEP OUTPUT CODE 255 254 253 11111111 11111110 11111101
STEP OUTPUT CODE 255 254 253 11111111 11111110 11111101 LE253
129 128 127
10000001 10000000 01111111
129 128 127
10000001 10000000 01111111 LE127 LE129 LE128
2 1 0
00000010 00000001 00000000 2.964 V Input Voltage V INA 4.996 V
2 1 0
00000010 LE2 00000001 LE1 00000000 V ZT Input Voltage V INA LE n max. Linearity Error = FS V FT
8
MB40578
s PACKAGE DIMENSION
Plastic DIP 22 pin , (DIP-22P-M04)
27.18 -0.30 1.070 -.012
+.008 +0.20
INDEX-1 INDEX-2 6.600.25 (.260.010)
4.36(.172)MAX
0.51(.020)MIN 0.250.05 (.010.002) 0.460.08 (.018.003)
+0.50 +.020 +0.50
3.00(.118)MIN
0.86 -0 1.27(.050) MAX
1.27 -0
.034 -0
.050 -0 2.54(.100) TYP
+.020
7.62(.300) TYP
15MAX
C
1994 FUJITSU LIMITED D22008S-4C-3
Dimensions in mm (inch)
9
MB40578
FUJITSU LIMITED
For further information please contact:
Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices KAWASAKI PLANT, 4-1-1, Kamikodanaka Nakahara-ku, Kawasaki-shi Kanagawa 211-88, Japan Tel: (044) 754-3753 Fax: (044) 754-3329 North and South America FUJITSU MICROELECTRONICS, INC. Semiconductor Division 3545 North First Street San Jose, CA 95134-1804, U.S.A. Tel: (408) 922-9000 Fax: (408) 432-9044/9045 Europe FUJITSU MIKROELEKTRONIK GmbH Am Siebenstein 6-10 63303 Dreieich-Buchschlag Germany Tel: (06103) 690-0 Fax: (06103) 690-122 Asia Pacific FUJITSU MICROELECTRONICS ASIA PTE. LIMITED No. 51 Bras Basah Road, Plaza By The Park, #06-04 to #06-07 Singapore 189554 Tel: 336-1600 Fax: 336-1609
All Rights Reserved. Circuit diagrams utilizing Fujitsu products are included as a means of illustrating typical semiconductor applications. Complete information sufficient for construction purposes is not necessarily given. The information contained in this document has been carefully checked and is believed to be reliable. However, Fujitsu assumes no responsibility for inaccuracies. The information contained in this document does not convey any license under the copyrights, patent rights or trademarks claimed and owned by Fujitsu. Fujitsu reserves the right to change products or specifications without notice. No part of this publication may be copied or reproduced in any form or by any means, or transferred to any third party without prior written consent of Fujitsu. The information contained in this document are not intended for use with equipments which require extremely high reliability such as aerospace equipments, undersea repeaters, nuclear control systems or medical equipments for life support.
F9607 (c) FUJITSU LIMITED
Printed in Japan
12

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