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参数资料
| 型号： | ADRF6801ACPZ-R7 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 调制器/解调器 |
| 英文描述： | 750 MHz - 1150 MHz RF/MICROWAVE I/Q DEMODULATOR |
| 封装： | 6 X 6 MM, ROHS COMPLIANT, MO-220VJJD-2, CP-40-1, LFSCP_VQ, 40 PIN |
| 文件页数： | 19/36页 |
| 文件大小： | 1034K |
| 代理商： | ADRF6801ACPZ-R7 |
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ADRF6801
Rev. 0 | Page 26 of 36
Component
Function
Default Condition
C1, C2, C3, C7, C8, C9, C10, C11, C12,
C16, C17, C18, C19, C20, C21, C22,
C23, C24, C25, C26, C27, C28
The capacitors provide the required decoupling of
the supply-related pins.
C1, C8, C10, C12 = 100 pF (0402),
C16, C18, C21, C22 = 100 pF (0402),
C24, C26 = 100 pF (0402),
C7, C9, C11 = 0.1 μF (0402),
C17, C19, C20, C23 = 0.1 μF (0402),
C25, C27 = 0.1 μF (0402),
C3, C2 = 10 μF (0603), C28 = 10 μF (3216)
T1, C5, C6
External LO path. The T1 transformer provides
single-ended-to-differential conversion. C5 and C6
provide the necessary ac coupling.
C5, C6 = 1 nF (0603),
T1 = TC1-1-13+ Mini-Circuits
R16, R14, R58, C31
REFIN input path. R14 provides a broadband 50 Ω
termination followed by C31, which provides the
ac coupling into REFIN. R16 provides an external
connectivity to the MUXOUT feature described in
Register 4. R58 provides option for connectivity to
the P1-6 line of a 9-pin D-sub connector for dc
measurements.
R14 = 49.9 Ω (0402),
R16 = 0 Ω (0402),
R58 = open (0402),
C31 = 1 nF (0603)
R2, R9, R10, R11, R12, R37, R38, R59,
R60, C4, C14, C15, C13
Loop filter component options. A variety of loop filter
topologies is supported using component
placements C4, C13, C14, C15, R9, R10, and R60. R38
and R59 provide connectivity options to numerous
test points for engineering evaluation purposes. R2
provides resistor programmability of the charge
pump current (see Register 4 description). R37
connects the charge pump output to the loop filter.
R12 references the loop filter to the VCO_LDO. Default
values on board provide a loop filter bandwidth of
roughly 130 kHz using a 26 MHz PFD frequency.
R12, R37, R38 = 0 Ω (0402),
R59 = open (0402),
R9, R60 = 10 kΩ (0402),
R10 = 3 kΩ (0402),
R2, R11 = open (0402),
C13 = 6.8 pF (0402),
C4, C14 = 22 pF (0402),
C15 = 2.7 nF (1206)
R3, R4, R5, R21, R22, R23, R39, R40,
R41, R42, R43, R44, R45, R46, R47,
R48, C29, C30, T2, T3, P2, P3
IF I/Q output paths. The T2 and T3 baluns provide a
9:1 impedance transformation; therefore, with a 50 Ω
load on the single-ended IOUT/QOUT side, the center
tap side of the balun presents a differential 450 Ω
to the ADRF6806. The center taps of the baluns are
ac grounded through C29 and C30. The baluns create
a differential-to-single-ended conversion for ease
of testing and use, but an option to have straight
differential outputs is achieved via populating R3,
R39, R23, and R42 with 0 Ω resistors and removing
R4, R5, R21, and R22. P2 and P3 are differential
measurement test points (not to be used as jumpers).
R4, R5, R21, R22, = 0 Ω (0402),
R40, R43, R45, R46 = 0 Ω (0402),
R47, R48 = 0 Ω (0402),
R3, R23, R39, R41, R42, R44 = open (0402),
C29, C30, = 0.1 μF (0402),
T2, T3 = TCM9-1+ Mini-Circuits,
P2, P3 = Samtec SSW-102-01-G-S
R28
RF input interface. R28 provides the single-ended
RF input path to the on-chip RF input balun.
R28 = 0 Ω (0402)
R30, R35, R50, R51, R52, R57, C32,
C33, C34, P1
Serial port interface. A 9-pin D-sub connector (P1)
is provided for connecting to a host PC or control
hardware. Optional RC filters can be installed on
the CLK, DATA, and LE lines to filter the PC signals
through R50 to R52 and C32 to C34. CLK, DATA, and
LE signals can be observed via test points for debug
purposes. R58 provides a connection to the MUXOUT
for sensing lock detect through the P1 connector.
R30, R35, R57 = 0 Ω (0402),
R50, R51, R52 = open (0402),
C32, C33, C34 = open (0402),
P1 = Tyco Electronics 5747840-3
R33, R55, R56, S1
LO select interface. The LOSEL pin, in combination
with the LDRV and LXL bits in Register 5, controls
whether the LOP and LON pins operate as inputs or
outputs. A detailed description of how the LOSEL pin,
LDRV bit, and the LXL bit work together to control
the LOP and LON pins is found in Table 4 under the
LOSEL pin description. Using the S1 switch, the
user can pull LOSEL to a logic high (VCC/2) or a logic
low (ground). Resistors R55 and R56 form a resistor
divider to provide a logic high of VCC/2. LO select
can also be controlled through Pin 9 of J1. The 0 Ω
jumper, R33, must be installed to control LOSEL via J1.
R33 = 0 Ω (0402),
R55, R56 = 10 kΩ (0402),
S1 = Samtec TSW-103-08-G-S
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