Datasheet
50MHz to 500MHz Analog VGA, 1735MHz to 1935MHz
Upconverting Mixer with Image Filtering, Threshold
Alarm Circuit, and Error Amplifier for Level Control
MAX2091
4
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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IF VGA (ATTENUATOR + AMPLIFIER)
Small-Signal Gain 23.5 26 27.5 dB
Noise Figure 4.0 dB
Output Third-Order
Intercept Point
OIP3
Up to 30dB attenuation,
P
IF_OUT
= 0dBm/tone, f
RF2
- f
RF1
= 1MHz
38.8 dBm
Output Second-Order
Intercept Point
OIP2
P
IF_OUT
= 0dBm/tone,
f
RF2
- f
RF1
= 1MHz
57.4 dBm
Output Second Harmonic P
IF_OUT
= 0dBm 64.5 dBc
Output Third Harmonic P
IF_OUT
= 0dBm 80.0 dBc
Output -1dB Compression Point P
1dB
17.6 dBm
Average Gain-Control Slope V
PLVLSET
= 0.5V to 2.0V 16.5 19.5 23.0 dB/V
Maximum Gain-Control Slope V
PLVLSET
= 0V to 2.5V 25 dB/V
VGA Reverse Isolation 35 dB
Attenuator Response Time
P
IF_IN
= -15dBm, V
PLVLSET
= 2.5V to
1.2V, output settled to within Q0.5dB of
final value
330
ns
P
IF_IN
= -15dBm, V
PLVLSET
= 1.2V to
2.5V, output settled to within Q0.5dB of
final value
220
Insertion Phase Change V
PLVLSET
= 2.5V to 0V 11.4 Degrees
MIXER WITH IMAGE REJECT FILTER
Conversion Gain G -2.2 -0.5 1.5 dB
SSB Noise Figure NF 17.1 dB
Output Third-Order Intercept
Point
OIP3 24.7 dBm
Output -1dB Compression Point P
1dB
12.2 dBm
Image Rejection
f
IF
= 350MHz Q 50MHz
15 20 dB
LO Leakage at RF_OUT -41 dBm
2LO Leakage at RF_OUT -35 dBm
Second Harmonic HD2 P
RF_OUT
= -2dBm 65 dBc
Third Harmonic HD3 P
RF_OUT
= -2dBm 77.5 dBc
3LO + IF Spur P
RF_OUT
= -2dBm 33 dBc
MIX_IN Return Loss 22 dB
LO+ Port Return Loss 24 dB
RF_OUT Return Loss 20 dB