adl5380 Analog Devices, Inc., adl5380 Datasheet - Page 9

• Manufacturer Part Number: adl5380
• Description: 400 To 6000mhz Quadrature Demodulator
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
Table 3. Evaluation Board Configuration Options
Component
VPOS, GND
R10x, R12x,
R19x
C6x to C10x
P1x, R11x,
R9x, R1x
R23x
C1x to C5x,
C12x
R2x to R7x,
R13x to
R18x
T2x, T4x
C15x, C16x
T1x
T3x
Function
Power Supply and Ground Vector Pins.
Power Supply Decoupling. Shorts or power supply decoupling resistors.
The capacitors provide the required dc coupling up to 6 GHz.
Device Enable. When connected to VPOS, the device is active.
Adjust Pin. Resistor value here sets the bias voltage at this pin and optimizes third order
distortion.
AC Coupling Capacitors. These capacitors provide the required ac coupling from
400MHz to 4GHz.
Single-Ended Baseband Output Path. This is the default configuration of the evaluation
board. R13x to R18x are populated for appropriate balun interface.
R2x to R5x are not populated. Baseband outputs are taken from QHI and IHI.
The user can reconfigure the board to use full differential baseband outputs. R2x to R5x
provide a means to bypass the 9:1 TCM9-1 transformer to allow for differential baseband
outputs. Access the differential baseband signals by populating R2x to R5x with 0 Ω and
not populating R13x to R18x. This way the transformer does not need to be removed.
The baseband outputs are taken from the SMAs of Q_HI, Q_LO, I_HI, and I_LO. R6x and
R7x are provisions for applying a specific differential load across the baseband outputs
IF Output Interface. TCM9-1 converts a differential high impedance IF output to a single-
ended output. When loaded with 50 Ω, this balun presents a 450 Ω load to the device.
The center tap can be decoupled through a capacitor to ground.
Decoupling Capacitors. C15x and C16x are the decoupling capacitors used to reject
noise on the center tap of the TCM9-1.
LO Input Interface. A 1:1 RF balun that converts the single-ended RF input to differential
signal is used.
RF Input Interface. A 1:1 RF balun that converts the single-ended RF input
to differential signal is used.
Rev. PrB | Page 9 of 10
Default Condition
Not Applicable
R10x, R12x, R19x = 0 Ω (0603)
C6x, C7x, C8x = 100 pF (0402)
C9x, C10x, C11x = 0.1 μF (0603)
P1A, R9x=DNI, R1x= DNI, R11x=
0 Ω.
R23A= 1.5k Ω (0603)
R23B= 200 Ω (0603)
C2x, C3x, C5x, C12x = 100 pF
(0402),
C1x, C4x = DNI
R13x to R18x = 0 Ω (0402),
R2x to R7x = Open
T2x, T4x = TCM9-1, 9:1 (Mini-
Circuits)
C15x, C16x = 0.1 μF (0402)
T1A = ETC1-1-13, 1:1 (M/A COM)
for operation < 3GHz.
T1B= Johanson 3600BL14M050
for operation from 3GHz to
4GHz.
T3A = ETC1-1-13, 1:1 (M/A COM)
for operation < 3GHz.
T3B= Johanson 3600BL14M050
for operation from 3GHz to
4GHz.
ADL5380