Alarm Circuit and Error Amplifier for Level Control
General Description
The MAX2090 high-linearity analog variable-gain ampli-
fier (VGA) is a monolithic SiGe BiCMOS attenuator,
amplifier, error amplifier, and alarm circuit, designed to
interface with 50I systems operating in the 50MHz to
1000MHz frequency range. An external analog control
voltage controls the analog attenuator. The device fea-
tures a gain range of -10.9dB to +26.1dB, a noise figure
of 4dB, OIP3 linearity of +38dBm, and a wide RF band-
width. Each of these features makes the device an ideal
VGA for numerous receiver and transmitter applications.
In addition, the device operates from a single +5.0V sup-
ply.
This device is available in a compact 20-pin TQFN pack-
age (5mm x 5mm) with an exposed pad. Electrical per-
formance is guaranteed over the extended temperature
range, from T
C
= -40NC to +95NC.
Benefits and Features
S
Wideband Coverage
50MHz to 1000MHz RF Frequency Range
S
High Linearity
+38dBm OIP3 (100MHz)
+17.5dBm Output -1dB Compression Point
(100MHz)
S
26.1dB Gain
S
37dB Attenuator Range
S
4dB Noise Figure (Includes Attenuator Insertion
Loss)
S
0.25dB Gain Variation Over 100MHz Bandwidth
S
Analog Attenuator Controlled with External
Voltage
S
Alarm Circuit with Adjustable Threshold
S
Extended +4.75V to +5.8V Supply Range
S
Lead(Pb)-Free Package
S
Power-Down Capabilities
Ordering Information
appears at end of data sheet.
Applications
Point-to-Point Receivers and Transmitters
RF/IF Variable-Gain Stages
Temperature-Compensation Circuits
Cellular Applications
WiMAX™ Applications
LTE Applications
Fixed Broadband Wireless Access
Wireless Local Loop
Military Systems
WiMAX is a trademark of WiMAX Forum.
For related parts and recommended products to use with this part, refer to:
www.maximintegrated.com/MAX2090.related
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6034; Rev 1; 9/12
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
ABSOLUTE MAXIMUM RATINGS
V
CC_A
, V
CC_RF
........................................................-0.3V to +6V
RF_IN, RF_OUT ........................................ -0.3V to (V
CC
+ 0.3V)
R_BIAS, ALM_THRES, PLVLSET,
AMP OUT..........................................................-0.3V to +3.6V
CTRL1, CTRL2 .....................................................-0.3V to +3.6V
ALM ......................................................................-0.3V to +3.6V
DET_VIN ..............................................................-0.3V to +3.6V
RF_IN Input Power ........................................................ +15dBm
RF_OUT Output Power ................................................. +20dBm
Continuous Power Dissipation (Note 1) ..............................2.5W
Operating Case Temperature Range (Note 2) .. -40NC to +95NC
Maximum Junction Temperature.....................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Note 1:
Based on junction temperature T
J
= T
C
+ (q
JC
x V
CC
x I
CC
). This formula can be used when the temperature of the
exposed pad is known while the device is soldered down to a PCB. See the
Applications Information
section for details.
The junction temperature must not exceed +150NC.
Note 2:
T
C
is the temperature on the exposed pad of the package. T
A
is the ambient temperature of the device and PCB.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS
TQFN
Junction-to-Ambient Thermal Resistance
q
JA
(Notes 3, 4)..+29NC/W
Junction-to-Case Thermal Resistance
q
JC
(Notes 1, 4).........7NC/W
Note 3:
Junction temperature T
J
= T
A
+ (q
JA
x V
CC
x I
CC
). This formula can be used when the ambient temperature of the PCB is
known. The junction temperature must not exceed +150NC.
Note 4:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
DC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit,
V
CC
= 4.75V to 5.8V, V
GND
= 0V, and T
C
= -40NC to +95NC. Typical values are at V
CC
= 5.5V,
V
PLVLSET
= 2.5V, and T
C
= +25NC, unless otherwise noted.) (Note 5)
PARAMETER
Supply Voltage
Total Supply Current
CTRL1/CTRL2 Logic-Low Input
Voltage
CTRL1/CTRL2 Logic-High Input
Voltage
CTRL1/CTRL2 Input Logic
Current
PLVLSET Input Resistance
PLVLSET Input Voltage Range
PLVLSET Minimum Control
Voltage
SYMBOL
V
CC
CTRL1 = 1, CTRL2 = 1
I
DC
CTRL1 = 1, CTRL2 = 0
CTRL1 = 0, CTRL2 = 0
V
IL
V
IH
I
IH
, I
IL
R
IN
2.2
-10
650
0
0
0.1
2.5
0.2
+10
CONDITIONS
MIN
4.75
TYP
5.0
81
71
5.7
MAX
5.8
110
100
15
0.8
V
V
FA
kI
V
V
mA
UNITS
V
Maxim Integrated
2
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical
Application Circuit,
V
CC
= 4.75V to 5.8V, V
GND
= 0V, and T
C
= -40NC to +95NC. Typical values are at V
CC
= 5.5V,
V
PLVLSET
= 2.5V, and T
C
= +25NC, unless otherwise noted.) (Note 5)
PARAMETER
PLVLSET Maximum Control
Voltage
ALM_THRES Input Resistance
ALM_THRES Input Voltage
Range
ALM Output Logic 1
ALM Output Logic 0
DET_VIN Input Resistance
175
235
(Note 6)
SYMBOL
CONDITIONS
MIN
2.3
90
0
3.135
3.3
TYP
2.4
135
2.5
3.465
0.4
295
MAX
2.5
UNITS
V
kI
V
V
V
kI
RECOMMENDED AC OPERATING CONDITIONS
PARAMETER
RF Frequency
SYMBOL
f
RF
(Note 7)
CONDITIONS
MIN
50
TYP
MAX
1000
UNITS
MHz
AC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit
with analog attenuator set to minimum attenuation, V
CC
= 4.75V to 5.8V, f
RF
= 350MHz, T
C =
-40NC
to +95NC, and RF ports are connected to 50I sources, unless otherwise noted. Typical values are at T
C
= +25NC, V
CC
= 5.5V,
P
RF_IN
= -25dBm, V
PLVLSET
= 2.5V, CTRL1 = 1, CTRL2 = 0. Min/max specifications apply over supply, process, and temperature,
unless otherwise noted.) (Note 8)
PARAMETER
Small-Signal Gain
Gain vs. Temperature
Maximum Gain Variation vs.
Frequency
Noise Figure
Total Attenuation Range
Group-Delay Variation
NF
f
RF
Q50MHz
f
RF
Q80MHz
f
RF
Q100MHz
(Note 6)
V
PLVLSET
= 0.2V to 2.5V (Note 5)
Within
Q50MHz
Within
Q80MHz
Within
Q100MHz
Output Third-Order Intercept
Point (Note 6)
V
PLVLSET
= 2.5V, P
RF_OUT
= 0dBm/tone,
f
RF2
- f
RF1
= 1MHz
V
PLVLSET
= 0.7V, P
RF_OUT
= 0dBm/tone,
f
RF2
- f
RF1
= 1MHz
31.8
31.8
35
SYMBOL
G
(Note 5)
CONDITIONS
T
C
= +25NC, V
CC
= 5.0V (Note 6)
MIN
24.5
23.5
TYP
26.1
26.1
-0.004
0.25
0.4
0.5
4
37
150
250
300
37.6
dBm
37.6
ps
5.7
dB
dB
dB
MAX
UNITS
dB
dB/NC
OIP3
Maxim Integrated
3
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical
Application Circuit
with analog attenuator set to minimum attenuation, V
CC
= 4.75V to 5.8V, f
RF
= 350MHz, T
C =
-40NC
to +95NC, and RF ports are connected to 50I sources, unless otherwise noted. Typical values are at T
C
= +25NC, V
CC
= 5.5V,
P
RF_IN
= -25dBm, V
PLVLSET
= 2.5V, CTRL1 = 1, CTRL2 = 0. Min/max specifications apply over supply, process, and temperature,
unless otherwise noted.) (Note 8)
PARAMETER
Output Second-Order Intercept
Point
Output Second Harmonic
Output Third Harmonic
Output -1dB Compression Point
Average Gain-Control Slope
Maximum Gain-Control Slope
VGA Reverse Isolation
P
RF_IN
= -15dBm, V
PLVLSET
= 2.5V to 1.2V,
output settled within
Q0.5dB
of final value
P
RF_IN
= -15dBm, V
PLVLSET
=1.2V to 2.5V,
output settled within
Q0.5dB
final value
V
PLVLSET
= 2.5V to 0V
Z
S
= 50I, over full attenuation range
(Note 6)
Z
L
= 50I over full attenuation range
(Note 6)
13.5
13.5
P
1dB
SYMBOL
OIP2
CONDITIONS
P
RF_OUT
= 0dBm/tone,
f
RF2
- f
RF1
= 1MHz,
f
RF_OUT
= f
RF2
+ f
RF1
P
RF_OUT
= 0dBm
P
RF_OUT
= 0dBm
(Note 9)
V
PLVLSET
= 0.5V to 2.0V (Note 6)
V
PLVLSET
= 0 to 2.5V
14
16.5
MIN
TYP
59.3
65.4
80.5
17.6
19.5
25
35
330
ns
220
11
20
20
Degrees
dB
dB
23.0
MAX
UNITS
dBm
dBc
dBc
dBm
dB/V
dB/V
dB
Attenuator Response Time
Insertion Phase Change
RF_IN Return Loss
RF_OUT Return Loss
ERROR AMPLIFIER AND ALARM CIRCUIT (CTRL1 = CTRL2 = 1)
Maximum AMP_OUT
Capacitance to GND
ALM Threshold
(Note 7)
ALM_THRES open (Input = DET_VIN)
1.35
20
pF
V
Note 5:
Production tested and guaranteed at T
C
= +95NC for worst-case supply voltage. Performance at T
C
= +25NC and
T
C
= -40NC are guaranteed by design and characterization for worst-case supply voltage.
Note 6:
Guaranteed by design and characterization.
Note 7:
Recommended functional range. Not production tested. Operation outside this range is possible, but with degraded
performance of some parameters.
Note 8:
All limits include external component losses. Output measurements were taken at the RF_OUT port.
Note 9:
It is advisable not to continuously operate the RF_IN input power above 11dBm, and RF_OUT power above 19dBm.
Maxim Integrated
4
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Typical Operating Characteristics
(Typical
Application Circuit
with analog attenuator set to minimum attenuation (V
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