Datasheet
50MHz to 500MHz Analog VGA, 1735MHz to 1935MHz
Upconverting Mixer with Image Filtering, Threshold
Alarm Circuit, and Error Amplifier for Level Control
MAX2091
5
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit with analog attenuator set to maximum gain, V
CC
= 4.75V to 5.8V, f
RF
= 1835MHz, f
LO
= 1485MHz,
f
IF
= 350MHz, f
RF
= f
LO
+ f
IF
, P
LO
= -10dBm to -4dBm, T
C
= -40°C to +95°C, and IF_IN, LO+, and RF_OUT ports are connected
to 50ω sources and loads, unless otherwise noted. Typical values are at T
C
= +25°C, V
CC
= 5.5V, P
LO
= -7dBm, P
IF
= -25dBm,
V
PLVLSET
= 2.5V, CTRL1 = logic 1, CTRL2 = logic 0. Min/max specifications apply over supply, process, and temperature, unless
otherwise noted. (Notes 5, 7, 8)
Note 5: Min and max limits are production tested, and guaranteed at T
C
= +95NC for worst-case supply voltage and frequency.
Note 6: Recommended functional range, not production tested. Operation outside this range is possible, but with degraded
performance of some parameters.
Note 7: All limits include external component and PCB losses. Output measurements taken at the RF port of the Typical Application
Circuit.
Note 8: It is advisable not to continuously operate the VGA IF_IN and MIX_IN above +11dBm.
Note 9: Gain variation after slope compensation with external equalizer in position R2–R4 in the Typical Application Circuit.
Typical Operating Characteristics
(Typical Application Circuit configured for AGC amp only (IF_IN to IF_OUT), analog attenuator set to maximum gain (V
PLVLSET
= 2.5V),
V
CC
= 5.5V, T
C
= +25NC, f
IF_IN
= 350MHz, P
IF_IN
= -25dBm, R
SOURCE
= R
LOAD
= 50I, CTRL1 = 1, CTRL2 = 0, ALM_THRES = ALM =
open, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ERROR AMPLIFIER AND ALARM CIRCUIT (CTRL1 = CTRL2 = LOGIC 1)
Maximum AMP_OUT
Capacitance to GND
(Note 6) 20 pF
ALM Threshold Input = DET_VIN 1.35 V
GAIN vs. IF FREQUENCY
MAX2091 toc01
IF FREQUENCY (MHz)
GAIN (dB)
28
24
50 500
410320230140
T
C
= +95°C
T
C
= +25°C
25
26
27
T
C
= -40°C
GAIN vs. IF FREQUENCY
MAX2091 toc02
IF FREQUENCY (MHz)
GAIN (dB)
28
24
50 500
410320230140
25
26
27
V
CC
= 4.75V, 5.00V, 5.50V, 5.80V
GAIN OVER PLVSET SETTING
vs. IF FREQUENCY
MAX2091 toc03
IF FREQUENCY (MHz)
GAIN (dB)
-10
0
10
20
30
-20
0V
1.5V
2.5V
2.0V
0.5V
50 500410320230140
1.0V