Datasheet

ADF4159 Data Sheet
Rev. D | Page 20 of 36
Charge Pump Three-State
When Bit DB4 is set to 1, the charge pump is placed into three-
state mode. For normal charge pump operation, set this bit to 0.
Counter Reset
Bit DB3 is the RF counter reset bit. When this bit is set to 1, the
RF synthesizer counters are held in reset. For normal operation,
set this bit to 0.
DB31
RESER
VED
PD
POLARITY
LDP
COUNTER
RESET
CP
THREE-STATE
CONTRO
L
BITS
DB30 DB29
DB28
DB27 DB26
DB25 DB24
DB23
DB22 DB21
DB20 DB19
DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10
DB9 DB8
DB7 DB6
DB5
DB4 DB3
DB2
DB1 DB0
0 0
0
0 0
0 0
NB3
NB2 NB1
0 0
0
0 1
L1 NS1 U12 0 0 RM2 RM1 0 0 U
1
1 U10
U9
U8 U7
C3(0) C2(1)
C1(1)
U9 POWER-DOWN
0 DISABLED
1 ENABLED
U10
PD POLARITY
0
NEGATIVE
1 POSITIVE
U1
1 LDP
0 14ns
1 6ns
NS1 N SEL
0 N WORD LOAD ON Σ-Δ CLOCK
1 N WORD LOAD DELA
YED 4 CYCLES
RM2
RAMP MODE
0
CONTINUOUS SAW
TOOTH
1
RM1
0
1 SINGLE RAM
P BURST
1 0
SINGLE SAW
TOOTH BURST
0 1
CONTINUOUS TRIANGULAR
NB2 NEG
ATIVE BLEED CURRENT (µA)
0 3.73
11.03
25.25
53.1
109.7
224.7
454.7
916.4
1
NB1
0
1
1
0
0
NB3
0
0
1
11
1
01
0 1
1
0
01
0
0 1
U7
COUNTER
RESET
0 DISABLED
1 ENABLED
U8
CP
THREE-STA
TE
0 DISABLED
1
ENABLED
Σ-Δ
RESET
N SEL
LOL
RESERVED
RESER
VED
RESE
RVED
NEG BLEED
CURRENT
NEG BLEED EN
U12 Σ-Δ RESET
0
ENABLED
1
DISABLED
L1
LOL
0 ENABLED
1
DISABLED
0
NEG BLEED EN
0 DISABLED
1 ENABLED
RAMP MODE
PSK
FSK
10849-023
0 FSK
0
DISABLED
1 ENABLED
0 PSK
0 DISABLED
1 ENABLED
POWER-DOWN
Figure 28. Function Register (R3) Map