MP7643 Exar Corporation, MP7643 Datasheet
MP7643
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MP7643 Summary of contents
Page 1
... Low AC Voltage Reference Feedthrough Excellent Channel-to-Channel Isolation GENERAL DESCRIPTION The MP7643 is ideal for digital gain control of high frequency analog signals such as video, composite video and CCD. The device includes 4-channels of high speed, wide bandwidth, two quadrant multiplying, 8-bit accurate digital-to-analog converter. ...
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... MP7643 SIMPLIFIED BLOCK DIAGRAM DBO DB7 (MSB Rev. 1. LATCH1 DAC1 LATCH2 DAC2 LATCH3 DAC3 LATCH4 DAC4 Control Logic DGND 2 V REF1 V OUT1 INV1 V REF2 V OUT2 INV2 V REF3 V OUT3 INV3 V REF4 V OUT4 INV4 V REFN ...
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... NAME 15 INV3 16 V OUT3 17 V REF3 18 V REF4 19 V OUT4 20 INV4 DB0 24 DB1 25 DB2 DB3 28 DB4 3 MP7643 DB4 28 DB3 DB2 25 DB1 24 DB0 INV4 V 19 OUT4 18 V REF4 17 V REF3 16 V OUT3 15 INV3 S28 DESCRIPTION ...
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... MP7643 ELECTRICAL CHARACTERISTICS TABLE FOR DUAL SUPPLIES Unless Otherwise Noted Output Load = No Resistive Load, V Parameter Symbol DC CHARACTERISTICS Resolution (All Grades) N Differential Non-Linearity DNL Integral Non-Linearity INL Monotonicity Gain Error GE Zero Scale Offset Z OFS Output Drive Capability I O REFERENCE/INV INPUTS ...
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... Package Power Dissipation Rating @ PDIP, SOIC, PLCC CC EE Derates above MP7643 Units Conditions – + – 150 ...
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... MP7643 A1, A0 DB0 to DB7 LD V OUT 2-4 A0, A1 Decoder LD Figure 2. Input Control Logic (Simplified) Block Diagram MSB Note: These outputs must be ratioed up for gain in the output amplifier. Analog Output vs. Digital Code (With V Rev. 1. ...
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... THEORY OF OPERATION The MP7643 is a 4-channel multiplying D/A converter that in- corporates a novel open loop architecture invented by MPS. The design produces the wider bandwidth, faster settling time, more constant group delay, and a lower noise operation compared to the conventional R-2R based architectures. This device is particularly useful in applications where analog multi- pliers are used to perform the gain adjustment function for high frequency analog signal conditioning ...
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... MP7643 1 0.75 0.5 0.25 0 –0.25 –0.5 –0.75 –1 0 Graph 1. Relative Accuracy vs. Digital Code Gain (5dB/DIV) Group Delay (20 ns/DIV) Graph 2. Typical Gain and Group Delay vs. Frequency (with 5K Resistor Across Output to V Rev. 1.00 64 128 Digital Code DACs MHz 8 192 256 ) EE ...
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... BSC 2.54 BSC 0.115 0.150 2.92 3. 0.055 0.070 1.40 1.78 0.020 0.100 0.508 2.54 (0.58 mm) for all four corner leads only. 9 MP7643 E C ...
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... MP7643 28 Seating Plane e Rev. 1.00 28 LEAD SMALL OUTLINE (300 MIL JEDEC SOIC) S28 INCHES MILLIMETERS SYMBOL MIN MAX MIN A 0.097 0.104 2.464 A1 0.0050 0.0115 0.127 B 0.014 0.019 0.356 C 0.0091 0.0125 0.231 D 0.701 0.711 17.81 E 0.292 0.299 7.42 e 0.050 BSC 1.27 BSC H 0 ...
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... Rev. 1.00 Notes 11 MP7643 ...
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... MP7643 EXAR Corporation reserves the right to make changes to the products contained in this publication in order to im- prove design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits de- scribed herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contains here in are only for illustration purposes and may vary depending upon a user’ ...