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AD9154 Datasheet(PDF) 108 Page - Analog Devices |
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AD9154 Datasheet(HTML) 108 Page - Analog Devices |
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108 / 124 page ![]() AD9154 Data Sheet Rev. C | Page 108 of 124 Addr. Name Bits Bit Name Settings Description Reset Access 0x284 LOOP_ FILTER_1 [7:4] LOOP_FILTER_1 Loop filter configuration setting. 0x7 R/W [3:0] 0x7 R/W 0x285 LOOP_ FILTER_2 [7:4] LOOP_FILTER_2 Loop filter configuration setting. 0x8 R/W [3:0] 0x7 R/W 0x286 LOOP_ FILTER_3 [7:4] LOOP_FILTER_3 Loop filter configuration setting. 0x0 R/W [3:0] 0x8 R/W 0x287 CP_CURRENT 7 RESERVED Reserved. 0x0 R 6 SPI_SERDES_ LOGEN_POWER_ MODE 0x0 R/W 0 Power Mode 0. 1 Power Mode 1. [5:0] SPI_CP_CURRENT CP Current Setting. 0x3F R/W 0x289 REF_CLK_ DIVIDER_LDO [7:4] RESERVED Reserved. 0x0 R 3 SPI_LDO_REF_ SEL Selects LDO reference to be from the band gap or a voltage divider (VDD/2). 0x0 R/W 0 Select band gap for reference. 1 Select voltage divider (VDD/2) for reference. 2 SPI_LDO_ BYPASS_FILT Bypasses filter on LDO reference input. 0x1 R/W 0 Filter enabled. 1 Filter bypassed. [1:0] SPI_CDR_ OVERSAMP Enable oversampling of input data. 0x0 R/W The valid options are: 1×, 2×, and 4×. 1× works for Half Rate—6.25 Gbps to 12.5 Gbps. 1× works for Full Rate—3.125 Gbps to 6.25 Gbps. 2× works for Full Rate—1.625 Gbps to 3.125 Gbps (2× oversampling). 4× works for Full Rate—812.5 Mbps to 1.625 Gbps (4× oversampling). Oversampling set in Register 0x230. 0 No oversampling. Data rate > 6 Gbps. 1 Oversample by 2×. 3 Gbps < data rate ≤ 6 Gbps. 2 Oversample by 4×. 1.5 Gbps < data rate ≤ 3 Gbps. 0x28A VCO_LDO [7:0] SPI_SERDES_LDO _CONFIG VCO LDO Setting. 0x2B R/W 0x28B PLL_PD_REG 7 RESERVED Reserved. 0x0 R/W 6 SPI_VCO_PD VCO enable. 0x1 R/W 0 VCO enabled. 1 VCO disabled. 5 SPI_VCO_PD_ PTAT 0x1 R/W 4 SPI_VCO_PD_ALC 0x1 R/W 3 SPI_SYN_PD 0x1 R/W 2 SPI_SERDES_ LDO_PD PD LDO. 0x1 R/W 0 LDO enabled. 1 LDO disabled. 1 SPI_SERDES_ LOGEN_PD_ OUTBUF PD divider buffer. 0x1 R/W 0 Buffer enabled. 1 Buffer disabled. |
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