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ADC-B207 Arkusz danych(PDF) 1 Page - List of Unclassifed Manufacturers |
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ADC-B207 Arkusz danych(HTML) 1 Page - List of Unclassifed Manufacturers |
1 / 6 page IN N O VA T IO N a n d E X C ELL E N C E ® ® INPUT/OUTPUT CONNECTIONS DIP LCC PINS FUNCTION PINS 1 CLOCK INPUT 1 2 DIGITAL GROUND 4 3 –REFERENCE 5 4 ANALOG INPUT 6 5 MIDPOINT 7 6 +REFERENCE 8 7 ANALOG GROUND 9 8 CS1 11 9 CS2 12 10 OVERFLOW 13 11 BIT 1 (MSB) 14 12 BIT 2 16 13 BIT 3 17 14 BIT 4 19 15 BIT 5 20 16 BIT 6 21 17 BIT 7 (LSB) 23 18 +5V SUPPLY 24 Figure 1. ADC-207 Functional Block Diagram (DIP Pinout) FEATURES • 7-bit flash A/D converter • 20MHz sampling rate • Low power (250mW) • Single +5V supply • 1.2 micron CMOS technology • 7-bit latched 3-state output with overflow bit • Surface-mount versions • High-reliability version • No missing codes GENERAL DESCRIPTION The ADC-207 is the industry’s first 7-bit flash converter using an advanced high-speed VLSI 1.2 micron CMOS process. This process offers some very distinctive advantages over other processes, making the ADC-207 unique. The smaller geometrics of the process achieve high speed, better linearity and superior temperature performance. Since the ADC-207 is a CMOS device, it also has very low power consumption (250mW). The device draws power from a single +5V supply and is conservatively rated for 20MHz operation. The ADC-207 allows using sampling apertures as small as 12ns, making it more closely approach an ideal sampler. The small sampling apertures also let the device operate at greater than 20MHz. The ADC-207 has 128 comparators which are auto-balanced on every conversion to cancel out any offsets due to temperature and/or dynamic effects. The resistor ladder has a midpoint tap for use with an external voltage source to improve integral linearity beyond 7 bits. The ADC-207 also provides the user with 3-state outputs for easy interfacing to other components. There are six models of the ADC-207 covering two operating temperature ranges, 0 to +70°C and –55 to +125°C. Two high- reliability "QL" models are also available. D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q D G Q ANALOG INPUT 4 +REFERENCE 6 DIGITAL GROUND 2 ANALOG GROUND 7 RANGE MIDPOINT 5 R/2 R R R R R/2 R/2 –REFERENCE 3 CS1 8 9 +5V SUPPLY 18 +VDD 1 CLOCK INPUT CLOCK GENERATOR 10 OVERFLOW 11 BIT 1 (MSB) 12 BIT 2 13 BIT 3 14 BIT 4 15 BIT 5 16 BIT 6 17 BIT 7 (LSB) 128-TO-7 ENCODER CS2 D G Q D G Q D G Q D G Q ∅1 ∅2 ∅2 ∅1 ADC-207 7-Bit, 20MHz, CMOS Flash A/D Converters DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) • Tel: (508) 339-3000 Fax: (508) 339-6356 • For immediate assistance (800) 233-2765 |
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Podobny opis - ADC-B207 |
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