MAX2090 MAXIM [Maxim Integrated Products], MAX2090 Datasheet - Page 12

• Manufacturer Part Number: MAX2090
• Description: 50MHz to 1000MHz Analog VGA with Threshold Alarm Circuit and Error Amplifier for Level Control
• Manufacturer: MAXIM [Maxim Integrated Products]

The alarm ALM output remains in a logic-high state while
DET_VIN is above the 1.35V nominal. ALM_THRES has
135kI input resistance and is set internally to 1.35V
(typ) such that ALM triggers when DET_VIN is below
1.35V. Alternatively, the voltage on ALM_THRES can
be externally driven to allow alternative power-level trip
points. When DET_IN is used to drive the DET_VIN pin
through R7, the nominal value for ALM logic-high is typi-
cally above 1.22V at DET_IN. The ALM comparator has
typical hysteresis of 29mV.
Table 2. Typical Application Circuit Component Values
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.
Maxim Integrated
Alarm Circuit and Error Amplifier for Level Control
COMPONENT
C1, C5
C2, C3
C14*
R11*
C16
C8
C9
R1
R5
R7
U1
L1
50MHz to 1000MHz Analog VGA with Threshold
MODE OF OPERATION
ONLY
VGA
—
—
—
—
—
—
√
√
√
√
√
√
Alarm Operation
CLOSED
ALC
√
√
√
√
√
√
√
√
√
√
√
Do not install
VALUE
1000pF
1.78kI
0.01FF
0.01FF
330nH
100nF
820pF
150I
24kI
0I
—
The pin configuration of the MAX2090 is optimized to
facilitate a very compact physical layout of the device
and its associated discrete components. The exposed
pad (EP) of the device’s 20-pin TQFN-EP package
provides a low thermal-resistance path to the die. It is
important that the PCB on which the device is mounted
be designed to conduct heat from the EP. In addition,
provide the EP with a low inductance path to electrical
ground. The EP MUST be soldered to a ground plane
on the PCB, either directly or through an array of plated
via holes.
20-pin TQFN
(5mm x
5mm)
SIZE
0402
0402
0603
0402
0402
0402
0603
0402
0402
0402
0402
SUPPLIER
Panasonic
Panasonic
Panasonic
Panasonic
Coilcraft
Murata
Murata
Murata
Murata
Murata
Maxim
—
Layout Considerations
MAX2090
Ferrite LS series
DESCRIPTION
MAX2090ETP+
C0G dielectric
C0G dielectric
X7R dielectric
X7R dielectric
X7R dielectric
5% tolerance
1% tolerance
1% tolerance
5% tolerance
1% tolerance
—
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