LTC6945 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LTC6945 Datasheet PDF : 28 Pages
| |||
LTC6945
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VREF+ = VREF0+ = VD+ = VRF+ = VVCO+ = 3.3V, VCP+ = 5V unless otherwise
specified. All voltages are with respect to GND.
SYMBOL PARAMETER
CONDITIONS
MIN
Reference Output (REFO)
fREFO
Output Frequency
PREFO
Output Power
Output Impedance, Disabled
VCO Input (VCO+, VCO–)
fREFO = 10MHz, RLOAD = 50Ω
l 10
l –0.2
fVCO
Input Frequency
PVCOI
Input Power Level
Input Resistance
RF Output (RF+, RF–)
RZ = 50Ω, Single-Ended
Single-Ended, Each Input
l 350
l –8
l 97
fRF
Output Frequency
O
Output Divider Range
All Integers Included
l 350
l1
Output Duty Cycle
Output Resistance
Output Common Mode Voltage
Single-Ended, Each Output to VRF+
l 111
l 2.4
PRF(SE)
Output Power, Single-Ended,
fRF = 900MHz
Output Power, Muted
Mute Enable Time
RFO[1:0] = 0, RZ = 50Ω, LC Match
RFO[1:0] = 1, RZ = 50Ω, LC Match
RFO[1:0] = 2, RZ = 50Ω, LC Match
RFO[1:0] = 3, RZ = 50Ω, LC Match
l –9.7
l –6.8
l –3.9
l –1.2
RZ = 50Ω, Single-Ended, fRF = 900MHz, O = 2 to 6 l
l
Mute Disable Time
l
Phase/Frequency Detector
fPFD
Input Frequency
l
Lock Indicator, Available on the STAT Pin and via the SPI-Accessible Status Register
tLWW
Lock Window Width
LKWIN[1:0] = 0
LKWIN[1:0] = 1
LKWIN[1:0] = 2
LKWIN[1:0] = 3
tLWHYS
Lock Window Hysteresis
Increase in tLWW Moving from Locked State to
Unlocked State
Charge Pump
ICP
VCLMP(LO)
VCLMP(HI)
VMID
Output Current Range
Output Current Source/Sink Accuracy
Output Current Source/Sink Matching
Output Current vs Output Voltage
Sensitivity
Output Current vs Temperature
Output Hi-Z Leakage Current
Low Clamp Voltage
High Clamp Voltage
Mid-Supply Output Bias Ratio
12 Settings (See Table 5)
VCP = VCP+/2, All Settings
ICP
ICP
=
=
225m0AμAtoto111..24mmAA,,VVCCPP==VVCCPP++//22
(Note 3)
VCP = VCP+/2
ICP = 700μA, CPCLO = CPCHI = 0 (Note 3)
ICP = 11.2mA, CPCLO = CPCHI = 0 (Note 3)
CPCLO = 1
CPCHI = 1, Referred to VCP+
Referred to (VCP+ – GND)
0.25
l
l
TYP MAX
250
3.2
800
6000
0
6
121
145
6000
6
50
136
159
VRF+
–6.0
–3.6
–0.4
2.3
–60
110
170
100
3.0
10.0
30.0
90.0
22
11.2
±6
±3.5
±2
0.1
0.5
170
0.5
5
0.84
–0.96
0.48
UNITS
MHz
dBm
Ω
MHz
dBm
Ω
MHz
%
Ω
V
dBm
dBm
dBm
dBm
dBm
ns
ns
MHz
ns
ns
ns
ns
%
mA
%
%
%
%/V
ppm/°C
nA
nA
V
V
V/V
6945f
3
Share Link: 