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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)
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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
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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
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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.
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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
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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
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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
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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
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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
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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) 754-3763 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 #05-08, 151 Lorong Chuan New Tech Park Singapore 556741 Tel: (65) 281-0770 Fax: (65) 281-0220
All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information and circuit diagrams in this document presented as examples of semiconductor device applications, and are not intended to be incorporated in devices for actual use. Also, FUJITSU is unable to assume responsibility for infringement of any patent rights or other rights of third parties arising from the use of this information or circuit diagrams. FUJITSU semiconductor devices are intended for use in standard applications (computers, office automation and other office equipment, industrial, communications, and measurement equipment, personal or household devices, etc.). CAUTION: Customers considering the use of our products in special applications where failure or abnormal operation may directly affect human lives or cause physical injury or property damage, or where extremely high levels of reliability are demanded (such as aerospace systems, atomic energy controls, sea floor repeaters, vehicle operating controls, medical devices for life support, etc.) are requested to consult with FUJITSU sales representatives before such use. The company will not be responsible for damages arising from such use without prior approval. Any semiconductor devices have inherently a certain rate of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Control Law of Japan, the prior authorization by Japanese government should be required for export of those products from Japan.
F9703 (c) FUJITSU LIMITED Printed in Japan
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