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DAC7822 数据表(PDF) 5 Page - Burr-Brown (TI) |
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DAC7822 数据表(HTML) 5 Page - Burr-Brown (TI) |
5 / 18 page www.ti.com DEVICE INFORMATION R A 1 R A 2 R A 2_3 R A 3 V A REF DGND LDAC DACA/B NC DB11 R B 1 R B 2 R B 2_3 R B 3 V B REF V DD CLR R/W CS DB0 1 2 3 4 5 6 7 8 9 10 30 29 28 27 26 25 24 23 22 21 DAC7822 DAC7822 SBAS374 – JUNE 2006 TERMINAL FUNCTIONS PIN NO. PIN NAME DESCRIPTION DAC A 4-Quadrant Resistors. Allows a number of configuration modes, including bipolar operation with 1-4 R1A, R2A, R2_3A, R3A minimum of external components. 5, 26 VREFA, VREFB DAC Reference Voltage Input Terminals. 6 DGND Digital Ground Pin. Load DAC Input. Allows asynchronous or synchronous updates to the DAC output. The DAC is asynchronously 7 LDAC updated when this signal goes low. Alternatively, if this line is held permanently low, an automatic or synchronous update mode is selected whereby the DAC is updated on the rising edge of CS. 8 DAC A/B Selects DAC A or B. Low selects DAC A, and high selects DAC B. 9, 34-37 NC Not internally connected. 10-21 DB11 to DB0 Parallel Data Bits 11 through 0. Chip Select Input; active low. Used in conjuction with R/W to load parallel data to the input latch or to read data 22 CS from the DAC register. Edge sensitive; when pulled high, the DAC data is latched. Read/Write. When low, used in conjunction with CS to load parallel data. When high, used in conjunction with 23 R/W CS to read back contents of DAC register. 24 CLR Active Low Control Input. Clears DAC output and input and DAC registers. 25 VDD Positive Power Supply Input. These parts can be operated from a supply of 2.5V to 5.5V. DAC B 4-Quadrant Resistors. Allow a number of configuration modes, including bipolar operation with a 27-30 R3B, R2_3B, R2B, R1B minimum of external components. 31, 40 RFBB, RFBA External Amplifier Output. DAC A Analog Ground. This pin typically should be tied to the analog ground of the system, but can be biased 32 IOUT2B to achieve single-supply operation. 33 IOUT1B DAC B Current Output. 38 IOUT1A DAC A Current Output. DAC A Analog Ground. This pin typically should be tied to the analog ground of the system, but can be biased 39 IOUT2A to achieve single-supply operation. 5 Submit Documentation Feedback |
类似零件编号 - DAC7822 |
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类似说明 - DAC7822 |
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