MAX2091 MAXIM [Maxim Integrated Products], MAX2091 Datasheet - Page 24

• 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 1. Mode Control Logic
The MAX2091 is a monolithic SiGe BiCMOS upconverter
IC that integrates an analog variable-gain amplifier, an
upconverting mixer stage, and image filter. The device
amplifies IF signals in the 50MHz to 500MHz range
before mixing them with an LO signal. The resulting
1735MHz to 1935MHz upconverted signal is then filtered
on-chip as the final stage of signal conditioning.
The analog attenuator is controlled by an external analog
control voltage. Device features include 23dB gain (no
attenuation), 5.4dB NF (no attenuation, including attenu-
ator insertion loss), and +24.5dBm OIP3. Each of these
features makes the MAX2091 an ideal upconverter for
numerous transmitter applications. When paired with the
MAX2092 RF VGA, a complete 2-chip IF-RF signal con-
ditioning solution is possible for microwave point-to-point
transmitter applications.
50MHz to 500MHz Analog VGA, 1735MHz to 1935MHz
CTRL1
PIN
17
18
19
20
—
Upconverting Mixer with Image Filtering, Threshold
0
1
1
0
Alarm Circuit, and Error Amplifier for Level Control
CTRL2
IF_OUT
MIX_IN
CTRL1
V
NAME
0
0
1
1
CC_IF
EP
Detailed Description
Disabled
Enabled
Enabled
VGA
—
Functional Control Bit (see Table 1)
Mixer Input. See the Typical Application Circuit for connection details.
Driver Amplifier Output (50I). See the Typical Application Circuit for connection details.
Driver-Amplifier Supply Voltage Input. Bypass to ground with a 10nF capacitor as close as
possible to the pin.
Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses
multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These
multiple via grounds are also required to achieve the noted RF performance (see the Layout
Considerations section).
Disabled
Enabled
Enabled
MIXER
—
AMPLIFIER
Disabled
Disabled
Enabled
ERROR
—
The MAX2091 can operate in several different modes, as
summarized in
VGA/mixer-only mode operation consists of setting
CTRL1 = logic 1 and CTRL2 = logic 0 and applying a DC
value to PLVLSET between 0 and 2.5V DC, to manually
adjust the IF attenuator and subsequently the RF_OUT
power. The output power at RF_OUT increases at a
rate of 19.5dB/V as PLVLSET is increased when IF_IN
is driven with a fixed input power between -25dBm and
+5dBm. The error amplifier and alarm are powered off
in this mode, reducing the supply current (10mA typ). In
VGA/mixer-only mode, components R5, R7, C8, C9, and
C16 are left unpopulated.
Disabled
Disabled
Enabled
LOOP
ALC
—
FUNCTION
Pin Description (continued)
Disabled
Disabled
Enabled
ALARM
Table
Applications Information
—
1.
VGA/Mixer-Only Mode Operation
FUNCTIONAL DESCRIPTION
ALC loop locks DET_VIN
VGA/Mixer Only Mode
Modes of Operation
Factory Test Mode
Power-Down Mode
Closed ALC Mode:
(Do Not Use)
MAX2091
to PLVLSET
24