MAX2091 MAXIM [Maxim Integrated Products], MAX2091 Datasheet - Page 26

• Manufacturer Part Number: MAX2091
• Description: 50MHz to 500MHz Analog VGA, 1735MHz to 1935MHz Upconverting Mixer with Image Filtering, Threshold Alarm Circuit, and Error Amplifier for Level Control
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 2. Typical Application Circuit Component Values
Additionally, a lowpass filter can be used between the
VGA output and the mixer input to reduce possible image
noise (RF + LO) at the VGA output from being downcon-
verted to the mixer output. Contact the factory for details.
The alarm output (ALM) remains in a logic-high state,
while DET_IN is above 1.35V nominally. ALM_THRES has
135kI input resistance and is set internally to 1.35V (typ),
such that ALM triggers when DET_IN is below 1.35V.
Alternatively, the voltage on ALM_THRES can be exter-
nally driven to allow alternative power-level trip points.
The ALM comparator has a typical hysteresis of 29mV.
Note: The checkmarks in the Mode of Operation columns indicate that the component is used within each respective application.
*C14 and R11 form an optional lowpass network to filter out potential noise from the external PLVLSET control source.
**R2–R4 form an optional 2.5dB attenuator pad.
50MHz to 500MHz Analog VGA, 1735MHz to 1935MHz
COMPONENT
C1, C5, C7
Upconverting Mixer with Image Filtering, Threshold
C10, C12
C4, C11
R2, R3**
C2, C3,
Alarm Circuit, and Error Amplifier for Level Control
C14*
R11*
R4**
C15
C16
C8
C9
R1
R5
R7
U1
L1
VGA/MIXER
ONLY
MODE OF OPERATION
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
Alarm Operation
Mixer LO Inputs
CLOSED-ALC
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
Do Not Install
VALUE
1000pF
1.78kI
0.01FF
0.01FF
330nH
100pF
100nF
820pF
174I
150I
24kI
7.1I
1FF
The mixer is designed to operate with LO+ signal levels
between -10dBm and -4dBm and with LO- grounded. In
cases where V
is below approximately -15dBm, the mixer’s LO driver
could produce undesired spurious at RF_OUT. In such
a case, applying -10dBm to -4dBm to LO+ returns the
mixer to proper operation. To eliminate the possibility
of spurious at RF_OUT with invalid LO+ signal levels,
power-down mode can be asserted (CTRL1 = CTRL2 =
logic 0) to disable RF_OUT.
The pin configuration of the MAX2091 is optimized to
facilitate a very compact physical layout of the device and
its associated discrete components. The exposed pad
0I
—
(5mm x 5mm)
20-pin TQFN
SIZE
0402
0402
0402
0603
0402
0402
0603
0402
0603
0402
0402
0402
0402
0402
0402
CC
is applied to the MAX2091 and LO+
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Layout Considerations
VENDOR
Coilcraft
Murata
Murata
Murata
Murata
Murata
Murata
Murata
Maxim
MAX2091
Ferrite LS series
DESCRIPTION
MAX2091ETP+
C0G Dielectric
C0G Dielectric
C0G Dielectric
X7R Dielectric
X7R Dielectric
X7R Dielectric
X7R Dielectric
5% Tolerance
1% Tolerance
1% Tolerance
1% Tolerance
1% Tolerance
5% Tolerance
1% Tolerance
26