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AD9517-2A/PCBZ Datenblatt(PDF) 68 Page - Analog Devices |
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AD9517-2A/PCBZ Datenblatt(HTML) 68 Page - Analog Devices |
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68 / 80 page ![]() AD9517-2 Data Sheet Rev. F | Page 68 of 80 Reg. Addr. (Hex) Bits Name Description 0x0AA [5:3] OUT7 ramp capacitors Selects the number of ramp capacitors used by the delay function. The combination of the number of capacitors and the ramp current sets the delay full scale. 5 4 3 Number of Capacitors 0 0 0 4 (default) 0 0 1 3 0 1 0 3 0 1 1 2 1 0 0 3 1 0 1 2 1 1 0 2 1 1 1 1 [2:0] OUT7 ramp current Ramp current for the delay function. The combination of the number of capacitors and the ramp current sets the delay full scale. 2 1 0 Current Value (μA) 0 0 0 200 (default) 0 0 1 400 0 1 0 600 0 1 1 800 1 0 0 1000 1 0 1 1200 1 1 0 1400 1 1 1 1600 0x0AB [5:0] OUT7 delay fraction Selects the fraction of the full-scale delay desired (6-bit binary). A setting of 000000b gives zero delay. Only delay values up to 47 decimals (101111b; 0x2F) are supported (default = 0x00). Table 56. LVPECL Outputs Reg. Addr. (Hex) Bits Name Description 0x0F0 4 OUT0 invert Sets the output polarity. 0: noninverting (default). 1: inverting. [3:2] OUT0 LVPECL Sets the LVPECL output differential voltage (VOD). differential voltage 3 2 VOD (mV) 0 0 400 0 1 600 1 0 780 (default) 1 1 960 [1:0] OUT0 power-down LVPECL power-down modes. 1 0 Mode Output 0 0 Normal operation (default). On 0 1 Partial power-down, reference on; use only if there are no external load resistors. Off 1 0 Partial power-down, reference on, safe LVPECL power-down. Off 1 1 Total power-down, reference off; use only if there are no external load resistors. Off |
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