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AD5547BRU датащи(PDF) 6 Page - Analog Devices |
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AD5547BRU датащи(HTML) 6 Page - Analog Devices |
6 / 20 page AD5547/AD5557 Rev. 0 | Page 6 of 20 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD5547 TOP VIEW (Not to Scale) D1 1 D0 2 ROFSA 3 RFBA 4 R1A 5 VREFA 7 IOUTA 8 AGNDA 9 DGND 10 AGNDA 11 IOUTB 12 VREFB 13 RCOMB 14 R1B 15 RFBB 16 ROFSB 17 18 A0 19 D2 38 D3 37 D4 36 D5 35 D6 34 D7 33 D8 32 D9 31 D10 30 VDD 29 D11 28 D12 27 D13 26 D14 25 D15 24 23 MSB 22 LDAC 21 A1 20 RCOMA 6 WR RS NC 1 NC 2 ROFSA 3 RFBA 4 R1A 5 VREFA 7 IOUTA 8 AGNDA 9 DGND 10 AGNDB 11 IOUTB 12 VREFB 13 RCOMB 14 R1B 15 RFBB 16 ROFSB 17 18 A0 19 RCOMA 6 WR NC = NO CONNECT D0 38 D1 37 D2 36 D3 35 D4 34 D5 33 D6 32 D7 31 D8 30 VDD 29 D9 28 D10 27 D11 26 D12 25 D13 24 23 MSB 22 LDAC 21 A1 20 RS AD5557 TOP VIEW (Not to Scale) Figure 4. AD5547 TSSOP-38 Pin Configuration Figure 5. AD5557 TSSOP-38 Pin Configuration Table 3. AD5547 Pin Function Descriptions Pin No. Mnemonic Function 1, 2, 24– 28, 30–38 D0–D15 Digital Input Data Bits D0 to D15. Signal level must be ≤ VDD + 0.3 V. 3 ROFSA Bipolar Offset Resistor A. Accepts up to ±18 V. In 2-quadrant mode, ROFSA ties to RFBA. In 4-quadrant mode, ROFSA ties to R1A and the external reference. 4 RFBA Internal Matching Feedback Resistor A. Connects to the external op amp for I-V conversion. 5 R1A 4-Quandrant Resistor. In 2-quadrant mode, R1A shorts to the VREFA pin. In 4-quadrant mode, R1A ties to ROFSA. Do not connect when operating in unipolar mode. 6 RCOMA Center Tap Point of the Two 4-Quadrant Resistors, R1A and R2A. In 4-quadrant mode, RCOMA ties to the inverting node of the reference amplifier. In 2-quadrant mode, RCOMA shorts to the VREF pin. Do not connect if operating in unipolar mode. 7 VREFA DAC A Reference Input in 2-Quadrant Mode, R2 Terminal in 4-Quadrant Mode. In 2-quadrant mode, VREFA is the reference input with constant input resistance versus code. In 4-quadrant mode, VREFA is driven by the external reference amplifier. 8 IOUTA DAC A Current Output. Connects to the inverting terminal of external precision I-V op amp for voltage output. 9 AGNDA DAC A Analog Ground. 10 DGND Digital Ground. 11 AGNDB DAC B Analog Ground. 12 IOUTB DAC B Current Output. Connects to inverting terminal of external precision I-V op amp for voltage output. 13 VREFB DAC B Reference Input Pin. Establishes DAC full-scale voltage. Constant input resistance versus code. If configured with an external op amp for 4-quadrant multiplying, VREFB becomes –VREF. 14 RCOMB Center Tap Point of the Two 4-Quadrant Resistors, R1B and R2B. In 4-quadrant mode, RCOMB ties to the inverting node of the reference amplifier. In 2-quadrant mode, RCOMB shorts to the VREF pin. Do not connect if operating in unipolar mode. 15 R1B 4-Quandrant Resistor. In 2-quadrant mode, R1B shorts to the VREFB pin. In 4-quadrant mode, R1B ties to ROFSB. Do not connect if operating in unipolar mode. 16 RFBB Internal Matching Feedback Resistor B. Connects to external op amp for I-V conversion. 17 ROFSB Bipolar Offset Resistor B. Accepts up to ±18 V. In 2-quadrant mode, ROFSB ties to RFBB. In 4-quadrant mode, ROFSB ties to R1B and an external reference. |
Аналогичный номер детали - AD5547BRU |
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Аналогичное описание - AD5547BRU |
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