FUJITSU SEMICONDUCTOR DATA SHEET DS04-28202-6E ASSP 1 CHANNEL 8-BIT VIDEO A/D CONVERTER MB40578 ■ 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. ■ 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 ■ PACKAGE Plastic DIP, 22 pin (DIP-22P-M04) MB40578 ■ PIN ASSIGNMENT 2 D.GND 1 22 A.GND (LSB)D8 2 21 VCCD D7 3 20 VCCA D6 4 19 VRB D5 5 18 VINA D4 6 TOP VIEW 17 VINA D3 7 16 VRM D2 8 15 VRT (MSB)D1 9 14 VCCA CLK 10 13 VCCD D.GND 11 12 A.GND MB40578 ■ BLOCK DIAGRAM CLK 10 V INA 17 18 V RT 15 V CCA V CCD 14 20 13 21 R1 1 R 9 D1(MSB) 8 D2 7 D3 6 D4 5 D5 4 D6 3 D7 2 D8(LSB) 2 R 127 255 to 8 ENCODER & BUFFER R/2 V RM LATCH 16 R/2 R R 128 254 255 R2 V RB 19 12 22 1 11 A.GND D. GND 3 MB40578 ■ ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Unit Power supply voltage VCCA VCCD –0.5 to +7.0 V Digital input voltage VIND –0.5 to +7.0 V Analog input voltage VINA –0.5 to VCC+0.5 V VRT, VRB –0.5 to VCC+0.5 V VSTG –55 to +125 °C Analog reference voltage Storage temperature 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. ■ RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min Typ Max Unit Power supply voltage*1 VCCA VCCD 4.75 5.00 5.25 V Analog input voltage*2 VINA 3 — 5 V VRT — 5 5.1 V VRB 2.9 3 — V Digital high-level output current IOHD –400 — — µA Digital low-level output current IOLD — — 4 mA Clock pulse width at high level tW+ 25 — — ns Clock pulse width at low level tW– 25 — — ns Operating temperature Ta 0 — 70 °C Analog reference voltage (Top side)*2 Analog reference voltage (Bottom side)* 2 Notes: *1: Please keep VCCA and VCCD at the same potential. *2: VRB < VINA < VRT, VRT – VRB = 2V + 0.1V. 4 Value MB40578 ■ ELECTRICAL CHARACTERISTICS 1. Analog DC Characteristics Parameter Symbol Condition Resolution Linearity error LE DC (VCCA = VCCD = 5V ± 5%, Ta = 0 to 70°C) Value Unit Min Typ Max — — 8 bits — — ±0.2 % Equivalent resistance for analog input RINA 50 — — kΩ Analog input capacitance CINA — 120 230 pF Analog high-level input current IIHA — — 150 µA Analog low-level input current IILA — — 145 µA Reference current IRB –15 –9 — mA VRT = 5V VRB = 3V 2. Digital DC Characteristics Parameter Symbol Condition (VCCA = VCCD = 5V ± 5%, Ta = 0 to 70°C) Value Unit Min Typ Max High-level output voltage VOH IOH = –400 µA 2.7 — — V Low-level output voltage VOL IOL = 1.6 mA — — 0.4 V High-level input voltage VIHD 2 — — V Low-level input voltage VILD — — 0.8 V Maximum input current IID VID = 7V — — 100 µA High-level input current IIHD VIHD = 2.7V — 0 20 µA Low level input current IILD VILD = 0.4V –400 –40 — µA Power supply current ICC — 92 160 mA 5 MB40578 3. Switching Characteristics Parameter Symbol Condition (VCCA = VCCD = 5V ± 5%, Ta = 0 to 70°C) Value Unit Min Typ Max Maximum conversion rate FS 20 30 — MSPS Digital output delay time tpd 5 15 40 ns Figure 1 Timing Diagram t W+ t W- 3V CLK 1.5 V 1.5 V 0V Sample N Sample N+2 Sample N+1 V INA 3V D1 to D8 Data N Data N–1 0V tpd 6 1.5 V Data N+1 MB40578 Figure 2 Analog Input Equivalent Circuit V CCA V CCA VD V INA V INA C INA R INA I BIAS A.GND V RB A.GND 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 Measurement point V CCA 25 kΩ 3.1 kΩ V CCD 25 kΩ RL 2.1 kΩ To Output pin CL V REF=1.4 V Input D.GND A.GND Note RL = 2 kΩ 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 Analog Input Voltage OUTPUT VOLTAGE(V) 0 2.960 V 00000000 1 2.968 V 00000001 127 3.976 V 01111111 128 3.984 V 10000000 129 3.992 V 10000001 245 4.992 V 1111110 255 5.000 V 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 7 Actual Conversion Characteristics Figure 6 Ideal Conversion Characteristics STEP OUTPUT CODE STEP OUTPUT CODE 255 11111111 255 11111111 254 11111110 254 11111110 253 11111101 253 11111101 LE253 129 10000001 129 10000001 128 10000000 128 10000000 127 01111111 127 01111111 LE129 LE128 LE127 2 00000010 2 00000010 1 00000001 1 00000001 0 00000000 0 00000000 L E2 L E1 2.964 V 8 Input Voltage V INA 4.996 V V ZT Input Voltage V INA LE n max. Linearity Error = FS V FT MB40578 ■ PACKAGE DIMENSION Plastic DIP, 22 pin (DIP-22P-M04) +0.20 27.18 –0.30 +.008 1.070 –.012 INDEX-1 6.60±0.25 (.260±.010) INDEX-2 4.36(.172)MAX 0.51(.020)MIN 3.00(.118)MIN 0.25±0.05 (.010±.002) 0.46±0.08 (.018±.003) +0.50 0.86 –0 +.020 .034 –0 1.27(.050) MAX C 1994 FUJITSU LIMITED D22008S-4C-3 +0.50 1.27 –0 +.020 .050 –0 2.54(.100) TYP 7.62(.300) TYP 15°MAX 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 FUJITSU LIMITED 12 Printed in Japan