MP7226 Exar Corporation, MP7226 Datasheet
MP7226
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MP7226 Summary of contents
Page 1
... BiCMOS process. The MP7226 incorpo- rates a unique bit decoding technique yielding lower glitch, higher speed and excellent accuracy over temperature and time. The MP7226 maintains 8-Bit accuracy over the full operat- The control ing temperature range without laser trim or external adjust- ments ...
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... DB6 Data Input Bit 6 9 DB5 Data Input Bit 5 10 DB4 Data Input Bit 4 Rev. 2.00 INL DNL Part No. (LSB) (LSB) 1/2 MP7226KN 1 MP7226LN* 1/2 1/2 MP7226KP 1 1/2 1/2 MP7226LP* 1/2 1/2 MP7226KS 1 MP7226LS* 1/2 1 See 4 17 Pin Out Left Pin SOIC (Jedec, 0.300”) S20 PIN NO ...
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... MP7226 Units Test Conditions/Comments Bits LSB End Point Linearity Spec LSB All grades monotonic over full temperature range. LSB 10 + REF LSB V = +10 V typ. Tempco is REF 5 ppm typ. Tempco is ...
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... MP7226 ELECTRICAL CHARACTERISTICS (CONT’D) Parameter Symbol POWER SUPPLY V Range Range (Dual Supplies (Dual Supplies) SS SWITCHING CHARACTERISTICS Address to WR Setup Time Address to WR Hold Time Data Valid to WR Setup Time Data Valid to WR Hold Time, t4 ...
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... 500 pF –70 dB 2.4 2.4 V 0.8 0 MP7226 = +1.25 V, REF Test Conditions/Comments End Point Linearity Spec All grades monotonic over full temperature range 5 1. REF V = +1.25 V REF V = +10 V OUT +1.25 V; Settling Time to REF 1/2 LSB Code transition all 0s to all 1s ...
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... MP7226 ELECTRICAL CHARACTERISTICS (CONT’D) Parameter Symbol POWER SUPPLY V Range (Dual Supplies) SS SWITCHING CHARACTERISTICS Address to WR Setup Time Address to WR Hold Time Data Valid to WR Setup Time Data Valid to WR Hold Time Pulse Width, t5 ...
Page 7
... This decoding scheme reduces the maximum binary weight carried by any re- sistor switch, reducing the accuracy required of the switches and resistor network. In the MP7226, the first three MSBs are decoded into three equal current sources, each contributing 25% of the full scale output current. 2R ...
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... The digital inputs are ESD protected to a rating of 2000 volts. Digital Interface Logic The MP7226 allows direct interface to most microprocessor buses without additional interface circuitry. Figure 3. shows the input control logic circuit diagram and Table 1. shows the control logic truth table and operation for WR, A1, A0 ...
Page 9
... At power up, all inputs are reset For the addressed DAC will receive input data. Power Supply The MP7226 can operate with either a single or dual power supply. Improved zero-code settling error can be obtained by using dual power supplies. The dual power supply specifica- tions are a positive supply (V ) range of +10 ...
Page 10
... OUT Figure 5. assuming Reference Signal An AC signal can be applied to the reference of the MP7226 for multiplying capability within the upper (+10V) and lower (+2V) limits of the reference voltage input, with either single or dual supplies . This signal must be level shifted or AC coupled with proper bias level before being applied to the reference in- put ...
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... V or GND Figure 8. Digitally Programmable buffer, the DAC output will begin to increment in a normal opera- tion. 5V Operation The MP7226 can be operated with a single power supply ( dual power supplies ( V DD –5V) . The reference voltage range is reduced along with Some performance parameter degradation. However the DNL of each DAC remains at 1 LSB guaranteeing monotonicity ...
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... MP7226 PERFORMANCE CHARACTERISTICS Graph 1. Power Supply Current vs. Temperature Rev. 2.00 Graph 2. Relative Accuracy vs. Digital Code 12 ...
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... BSC 2.54 BSC 0.115 0.150 2.92 3. 0.055 0.070 1.40 1.78 0.040 0.080 1.02 2.03 (0.58 mm) for all four corner leads only. 13 MP7226 E C ...
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... MP7226 D 20 Seating Plane e Rev. 2.00 20 LEAD SMALL OUTLINE (300 MIL JEDEC SOIC) S20 INCHES MILLIMETERS SYMBOL MIN MAX MIN A 0.097 0.104 2.464 A 0.0050 0.0115 0.127 1 B 0.014 0.019 0.356 C 0.0091 0.0125 0.231 D 0.500 0.510 12.70 E 0.292 0.299 7 ...
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... Ref 5.08 Ref. 0.050 BSC 1.27 BSC (1) Dimension D does not include mold protrusion. 1 Allowed mold protrusion is 0.254 mm/0.010 in. 15 MP7226 Seating A 2 Plane 4.57 2.79 3.96 8.99 8.38 ...
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... MP7226 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’ ...