MAX2871 Datasheet, PDF (24/28 Pages) Maxim Integrated Products – Low Normalized Inband Phase Noise of -230dBc/Hz

MAX2871
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer /VCO
Table 7. Register 4 (Address: 100^{, Default: 6180B23C}HEX) (continued)
BIT LOCATION
BIT ID
NAME
DEFINITION
5
RFA_EN
RFOUTA Output
Mode
Sets RFOUTA output mode.
0 = Disabled
1 = Enabled
Sets RFOUTA single-ended output power. See the ^{RFOUTA± and}
RFOUTB± _section.
4:3
APWR[1:0]
RFOUTA Output 00 = -4dBm
Power
01 = -1dBm
10 = +2dBm
11 = +5dBm
2:0
C[2:0]
Register Address Control Register address bits
Table 8. Register 5 (Address: 101^{, Default: 00400005}HEX)
BIT LOCATION
BIT ID
NAME
31
Reserved
Reserved
Reserved. Program to 0.
DEFINITION
30:29
28:26
25
VAS_DLY
Reserved
SDPLL
VAS_DLY
Reserved
Shutdown PLL
VCO Autoselect Delay.
Program to 11 when VAS_TEMP=1
Program to 00 when VAS_TEMP=0
Reserved. Program to 000.
Sets Shutdown PLL mode.
0 = Enables PLL
1 = Disables PLL
24
23:22
21:19
18
17:7
6
5:3
2:0
F01
LD[1:0]
Reserved
MUX[3]
Reserved
ADCS
ADCM[2:0]
ADDR[2:0]
Sets integer mode for F = 0.
F01
0 = If F[11:0] = 0, then fractional-N mode is set
1 = If F[11:0] = 0, then integer-N mode is auto set
Lock-Detect Pin
Function
Reserved
Sets lock-detect pin function.
00 = Low
01 = Digital lock detect
10 = Analog lock detect
11 = High
Reserved. Program to 000.
MUX MSB
Reserved
Sets mode at MUX pin (see register 2 [28:26])
Reserved. Program to 00000000000.
ADC Start
ADC Mode
Sets ADC Start mode.
0 = ADC normal operation
1 = Start ADC conversion process
Sets ADC mode.
000 = Disabled
001 = Temperature sensor
010 = Reserved
011 = Reserved
100 = Tune pin
101 = Reserved
110 = Reserved
111 = Reserved
Register Address Control Register address bits
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