ADRF6750 Analog Devices, Inc., ADRF6750 Datasheet - Page 29

• Manufacturer Part Number: ADRF6750
• Description: 950 Mhz To 1575 Mhz Quadrature Modulator With Integrated Fractional-n Pll And Vco
• Manufacturer: Analog Devices, Inc.

Table 14. Register CR9 (Address 0x09), Charge Pump
Current Setting
Bit
[7:4]
3
2
1
0
1
Table 15. Register CR10 (Address 0x0A), Reference
Frequency Control
Bit
7
6
5
[4:0]
1
Double-buffered. Loaded on the write to Register CR0.
Double-buffered. Loaded on the write to Register CR0.
Description
Charge pump current
0000 = 0.31 mA (default)
0001 = 0.63 mA
0010 = 0.94 mA
0011 = 1.25 mA
0100 = 1.57 mA
0101 = 1.88 mA
0110 = 2.19 mA
0111 = 2.50 mA
1000 = 2.81 mA
1001 = 3.13 mA
1010 = 3.44 mA
1011 = 3.75 mA
1100 = 4.06 mA
1101 = 4.38 mA
1110 = 4.69 mA
1111 = 5.00 mA
Reserved
Reserved
Reserved
Reserved
Description
Reserved
R/2 divider enable
0 = bypass R/2 divider (default)
1 = enable R/2 divider
R-doubler enable
0 = disable doubler (default)
1 = enable doubler
5-bit R-divider setting
00000 = divide by 32 (default)
00001 = divide by 1
00010 = divide by 2
…
11110 = divide by 30
11111 = divide by 31
1
1
1
1
1
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Table 16. Register CR12 (Address 0x0C), PLL Power-Up
Bit
7
6
5
4
3
2
1
0
Table 17. Register CR14 (Address 0x0E), TXDIS Control
Table 18. Register CR23 (Address 0x17), Lock Detector Control
Bit
7
6
5
4
3
2
1
0
Bit
7
6
5
4
3
2
1
0
Description
Reserved
Reserved
Reserved
Reserved
Reserved
Power down PLL
0 = power up PLL (default)
1 = power down PLL
Reserved
Reserved
Description
Reserved
Reserved
TxDis_attenuator
0 = attenuator always enabled (default)
1 = disable attenuator when TXDIS = 1
TxDis_LOBuf
0 = LOBuf always enabled (default)
1 = disable LOBuf when TXDIS = 1
TxDis_QuadDiv
0 = QuadDiv always enabled (default)
1 = disable QuadDiv when TXDIS = 1
Reserved
TxDis_LOX2
0 = LOX2 always enabled (default)
1 = Disable LOX2 when TXDIS = 1
TxDis_RFMON
0 = RFMON always enabled (default)
1 = Disable RFMON when TXDIS = 1
Description
Reserved
Reserved
Reserved
Lock detector enable
0 = lock detector disabled (default)
1 = lock detector enabled
Lock detector up/down count
0 = 3072 up/down pulses
1 = 2048 up/down pulses
Lock detector precision
0 = low, coarse (16 ns)
1 = high, fine (6 ns)
Reserved
Reserved
ADRF6750