MAX2090_V01 [MAXIM]
50MHz to 1000MHz Analog VGA with Threshold Alarm Circuit and Error Amplifier for Level Control;
| 型号： | MAX2090_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 50MHz to 1000MHz Analog VGA with Threshold Alarm Circuit and Error Amplifier for Level Control |
| 文件： | 总14页 (文件大小：688K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
General Description
Benefits and Features
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.
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
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
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
range, from T = -40NC to +95NC.
C
Applications
Point-to-Point Receivers and Transmitters
RF/IF Variable-Gain Stages
Temperature-Compensation Circuits
Cellular Applications
S Power-Down Capabilities
Ordering Information appears at end of data sheet.
WiMAX™ Applications
LTE Applications
Fixed Broadband Wireless Access
Wireless Local Loop
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 2; 5/15
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
ABSOLUTE MAXIMUM RATINGS
CC_A CC_RF
RF_IN, RF_OUT........................................ -0.3V to (V
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
V
, V
........................................................-0.3V to +6V
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
+ 0.3V)
CC
Note 1: Based on junction temperature T = T + (q x V
x I ). This formula can be used when the temperature of the
CC
J
C
JC
CC
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 is the temperature on the exposed pad of the package. T is the ambient temperature of the device and PCB.
C
A
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 (Notes 3, 4)..+29NC/W
JA
Junction-to-Case Thermal Resistance q (Notes 1, 4).........7NC/W
JC
Note 3: Junction temperature T = T + (q x V
x I ). This formula can be used when the ambient temperature of the PCB is
CC
J
A
JA
CC
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
= 4.75V to 5.8V, V
= 0V, and T = -40NC to +95NC. Typical values are at V = 5.5V,
CC
CC
GND
C
V
= 2.5V, and T = +25NC, unless otherwise noted.) (Note 5)
PLVLSET
C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
5.0
81
MAX
5.8
UNITS
Supply Voltage
V
4.75
V
CC
CTRL1 = 1, CTRL2 = 1
110
100
15
Total Supply Current
I
CTRL1 = 1, CTRL2 = 0
CTRL1 = 0, CTRL2 = 0
71
mA
DC
5.7
CTRL1/CTRL2 Logic-Low Input
Voltage
V
0.8
V
V
IL
CTRL1/CTRL2 Logic-High Input
Voltage
V
2.2
-10
IH
CTRL1/CTRL2 Input Logic
Current
I
, I
+10
FA
IH IL
PLVLSET Input Resistance
R
650
0
kI
IN
PLVLSET Input Voltage Range
2.5
0.2
V
PLVLSET Minimum Control
Voltage
0
0.1
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
= 4.75V to 5.8V, V
= 0V, and T = -40NC to +95NC. Typical values are at V = 5.5V,
CC
GND
C
CC
V
= 2.5V, and T = +25NC, unless otherwise noted.) (Note 5)
PLVLSET
C
PARAMETER
SYMBOL
CONDITIONS
MIN
2.3
TYP
2.4
MAX
UNITS
PLVLSET Maximum Control
Voltage
2.5
V
kI
V
ALM_THRES Input Resistance
90
135
ALM_THRES Input Voltage
Range
(Note 6)
0
2.5
ALM Output Logic 1
3.135
3.3
3.465
0.4
V
V
ALM Output Logic 0
DET_VIN Input Resistance
175
235
295
kI
RECOMMENDED AC OPERATING CONDITIONS
PARAMETER
RF Frequency
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
f
(Note 7)
50
1000
MHz
RF
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit with analog attenuator set to minimum attenuation, V
= 4.75V to 5.8V, f
= 350MHz, T
-40NC
CC
RF
C =
to +95NC, and RF ports are connected to 50I sources, unless otherwise noted. Typical values are at T = +25NC, V
= 5.5V,
C
CC
P
= -25dBm, V
= 2.5V, CTRL1 = 1, CTRL2 = 0. Min/max specifications apply over supply, process, and temperature,
RF_IN
PLVLSET
unless otherwise noted.) (Note 8)
PARAMETER
SYMBOL
CONDITIONS
= +25NC, V = 5.0V (Note 6)
CC
MIN
24.5
23.5
TYP
26.1
26.1
-0.004
0.25
0.4
MAX
UNITS
dB
T
C
Small-Signal Gain
G
(Note 5)
Gain vs. Temperature
dB/NC
f Q50MHz
RF
Maximum Gain Variation vs.
Frequency
f Q80MHz
dB
RF
f Q100MHz
0.5
RF
Noise Figure
NF
(Note 6)
4
5.7
dB
dB
Total Attenuation Range
V
= 0.2V to 2.5V (Note 5)
35
37
PLVLSET
Within Q50MHz
Within Q80MHz
Within Q100MHz
150
250
300
Group-Delay Variation
ps
V
f
= 2.5V, P
- f = 1MHz
RF2 RF1
= 0dBm/tone,
= 0dBm/tone,
PLVLSET
RF_OUT
31.8
31.8
37.6
37.6
Output Third-Order Intercept
Point (Note 6)
OIP3
dBm
V
= 0.7V, P
= 1MHz
PLVLSET
RF_OUT
f
- f
RF2 RF1
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
= 4.75V to 5.8V, f
= 350MHz, T
-40NC
CC
RF
C =
to +95NC, and RF ports are connected to 50I sources, unless otherwise noted. Typical values are at T = +25NC, V
= 5.5V,
C
CC
P
= -25dBm, V
= 2.5V, CTRL1 = 1, CTRL2 = 0. Min/max specifications apply over supply, process, and temperature,
RF_IN
PLVLSET
unless otherwise noted.) (Note 8)
PARAMETER
SYMBOL
CONDITIONS
= 0dBm/tone,
MIN
TYP
MAX
UNITS
P
RF_OUT
Output Second-Order Intercept
Point
OIP2
f
f
- f
= 1MHz,
59.3
dBm
RF2 RF1
= f
+ f
RF_OUT
RF2
RF1
Output Second Harmonic
Output Third Harmonic
P
P
= 0dBm
= 0dBm
65.4
80.5
17.6
19.5
25
dBc
dBc
dBm
dB/V
dB/V
dB
RF_OUT
RF_OUT
Output -1dB Compression Point
Average Gain-Control Slope
Maximum Gain-Control Slope
VGA Reverse Isolation
P
(Note 9)
14
1dB
V
V
= 0.5V to 2.0V (Note 6)
= 0 to 2.5V
16.5
23.0
PLVLSET
PLVLSET
35
P
= -15dBm, V
= 2.5V to 1.2V,
RF_IN
PLVLSET
330
output settled within Q0.5dB of final value
Attenuator Response Time
ns
P
= -15dBm, V =1.2V to 2.5V,
RF_IN
PLVLSET
220
11
output settled within Q0.5dB final value
Insertion Phase Change
RF_IN Return Loss
V
= 2.5V to 0V
Degrees
dB
PLVLSET
Z = 50I, over full attenuation range
S
13.5
13.5
20
(Note 6)
Z = 50Iover full attenuation range
L
RF_OUT Return Loss
20
dB
(Note 6)
ERROR AMPLIFIER AND ALARM CIRCUIT (CTRL1 = CTRL2 = 1)
Maximum AMP_OUT
(Note 7)
20
pF
V
Capacitance to GND
ALM Threshold
ALM_THRES open (Input = DET_VIN)
1.35
Note 5: Production tested and guaranteed at T = +95NC for worst-case supply voltage. Performance at T = +25NC and
C
C
T
= -40NC are guaranteed by design and characterization for worst-case supply voltage.
C
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
= 2.5V), V
= 5.5V, T = +25NC, f
=
PLVLSET
CC
C
RF_IN
350MHz, P
= -25dBm, R
= R
= 50I, CTRL1 = 1, CTRL2 = 0, ALM_THRES = ALM = open, unless otherwise noted.)
RF_IN
SOURCE
LOAD
SUPPLY CURRENT vs. V
CC
GAIN vs. RF FREQUENCY
GAIN vs. RF FREQUENCY
80
75
70
65
60
28
27
26
25
24
23
22
27
26
25
24
23
22
T
C
= -40°C
T
= +95°C
C
T
C
= +25°C
T
C
= +25°C
V
= 4.75V, 5.00V, 5.50V, 5.80V
CC
T
C
= +95°C
T
C
= -40°C
4.75 4.90 5.05 5.20 5.35 5.50 5.65 5.80
(V)
50
250
450
650
850
1050
50
250
450
650
850
1050
V
CC
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
GAIN OVER V
vs. RF FREQUENCY
PLVLSET
GAIN vs. V
PLVLSET
GAIN vs. V
PLVLSET
30
20
30
20
30
20
2.5V
f
RF
= 350MHz
50MHz
T
C
= -40°C, +25°C, +95°C
10
10
10
1000MHz
350MHz, 500MHz
0
0
0
-10
-20
-10
-20
-10
-20
V
INCREMENT = 0.25V
PLVLSET
450
0V
0
0.5
1.0
1.5
(V)
2.0
2.5
0
0.5
1.0
1.5
(V)
2.0
2.5
50
250
650
850
1050
V
V
PLVLSET
RF FREQUENCY (MHz)
PLVLSET
Maxim Integrated
5
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Typical Operating Characteristics (continued)
(Typical Application Circuit with analog attenuator set to minimum attenuation (V
= 2.5V), V
= 5.5V, T = +25NC, f
=
PLVLSET
CC
C
RF_IN
350MHz, P
= -25dBm, R
= R
= 50I, CTRL1 = 1, CTRL2 = 0, ALM_THRES = ALM = open, unless otherwise noted.)
RF_IN
SOURCE
LOAD
REVERSE ISOLATION OVER V
vs. RF FREQUENCY
PLVLSET
INPUT MATCH vs. V
OUTPUT MATCH vs. V
PLVLSET
PLVLSET
0
-10
-20
-30
0
-10
-20
-30
-40
80
70
60
50
40
30
20
1000MHz
50MHz
50MHz
1000MHz
500MHz
V
= 0V
PLVLSET
500MHz
350MHz
350MHz
V
= 2.5V
650
PLVLSET
450
-40
0
0.5
1.0
1.5
(V)
2.0
2.5
0
0.5
1.0
1.5
(V)
2.0
2.5
50
250
850
1050
V
V
PLVLSET
PLVLSET
RF FREQUENCY (MHz)
S21 PHASE CHANGE vs. V
NOISE FIGURE vs. RF FREQUENCY
NOISE FIGURE vs. RF FREQUENCY
PLVLSET
90
60
7
6
5
4
3
2
7
6
5
4
3
2
REFERENCED TO
HIGH GAIN STATE
1000MHz
350MHz
T
C
= +95°C
500MHz
T
= +25°C
C
30
V
= 4.75V, 5.00V, 5.50V, 5.80V
CC
0
-30
-60
50MHz
T
C
= -40°C
POSITIVE PHASE = ELECTRICALLY SHORTER
-90
0
0.5
1.0
1.5
(V)
2.0
2.5
50
250
450
650
850
1050
50
250
450
650
850
1050
V
PLVLSET
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
Maxim Integrated
6
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Typical Operating Characteristics (continued)
(Typical Application Circuit with analog attenuator set to minimum attenuation (V
= 2.5V), V
= 5.5V, T = +25NC, f
=
PLVLSET
CC
C
RF_IN
350MHz, P
= -25dBm, R
= R
= 50I, CTRL1 = 1, CTRL2 = 0, ALM_THRES = ALM = open, unless otherwise noted.)
RF_IN
SOURCE
LOAD
OUTPUT P1dB vs. RF FREQUENCY
OUTPUT P1dB vs. RF FREQUENCY
OUTPUT IP3 vs. RF FREQUENCY
20
18
16
14
12
20
18
16
14
12
40
35
30
25
P
= 0dBm/TONE
OUT
T
= -40°C
= +95°C
C
V
= 5.50V, 5.80V
CC
T
= +25°C
C
T
= -40°C
C
V
= 5.00V
T
CC
C
T
C
= +25°C
V
= 4.75V
850
T = +95°C
C
CC
50
250
450
650
850
1050
50
250
450
650
1050
50
250
450
650
850
1050
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
OUTPUT IP3 vs. V
OUTPUT IP3 vs. RF FREQUENCY
PLVLSET
P = 0dBm/TONE
OUT
2nd HARMONIC vs. RF FREQUENCY
47
42
37
32
40
35
30
25
90
80
70
60
50
40
T
= -40°C LSB
C
P
= 0dBm/TONE
P
= 0dBm
OUT
OUT
f
RF
= 350MHz
T
C
= +25°C LSB,
-40°C USB
V
= 5.80V
CC
T
= +25°C
C
V
= 5.50V
CC
T
= -40°C
C
T
C
= +95°C
V
= 5.00V
CC
T
= +95°C LSB
C
V
= 4.75V
CC
T
= +25°C USB
= +95°C USB
C
T
C
0.65
1.02
1.39
1.76
(V)
2.13
2.50
50
250
450
650
850
1050
50
250
450
650
850
1050
V
RF FREQUENCY (MHz)
PLVLSET
RF FREQUENCY (MHz)
Maxim Integrated
7
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Typical Operating Characteristics (continued)
(Typical Application Circuit with analog attenuator set to minimum attenuation (V
= 2.5V), V
= 5.5V, T = +25NC, f
=
PLVLSET
CC
C
RF_IN
350MHz, P
= -25dBm, R
= R
= 50I, CTRL1 = 1, CTRL2 = 0, ALM_THRES = ALM = open, unless otherwise noted.)
RF_IN
SOURCE
LOAD
2nd HARMONIC vs. RF FREQUENCY
2nd HARMONIC vs. V
3rd HARMONIC vs. RF FREQUENCY
PLVLSET
90
80
70
60
50
40
90
80
70
60
50
40
110
100
90
P
= 0dBm
P
= 0dBm
P
= 0dBm
OUT
OUT
OUT
f
RF
= 350MHz
V
= 5.80V
CC
T
= +25°C
C
T
C
= -40°C
V
= 5.50V
T = -40°C
C
CC
T
C
= +25°C
80
T
= +95°C
C
70
V
= 5.00V
CC
V
= 4.75V
850
CC
T
C
= +95°C
60
50
250
450
650
1050
0.65
1.02
1.39
1.76
(V)
2.13
2.50
50
250
450
650
850
1050
RF FREQUENCY (MHz)
V
RF FREQUENCY (MHz)
PLVLSET
3rd HARMONIC vs. V
OIP2 vs. RF FREQUENCY
3rd HARMONIC vs. RF FREQUENCY
PLVLSET
110
100
90
70
60
50
40
110
100
90
P
= 0dBm
P
= 0dBm/TONE
OUT
P
= 0dBm
OUT
OUT
f
RF
= 350MHz
T
C
= +25°C
T
= -40°C
C
T
C
= +25°C
V
= 4.75V, 5.00V, 5.50V, 5.80V
CC
T
= -40°C
C
80
80
T
C
= +95°C
70
T
C
= +95°C
70
60
60
0.65
1.02
1.39
1.76
2.13
2.50
50
250
450
650
850
1050
50
250
450
650
850
1050
V
(V)
PLVLSET
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
OIP2 vs. RF FREQUENCY
OIP2 vs. V
PLVLSET
70
70
P
= 0dBm/TONE
= 5.80V
OUT
P
= 0dBm/TONE
OUT
f
RF
= 350MHz
T
C
= +25°C
V
CC
60
50
60
50
40
T
= -40°C
V
= 5.50V
C
CC
T
C
= +95°C
V
= 5.00V
CC
V
= 4.75V
CC
40
50
250
450
650
850
1050
0.65
1.02
1.39
1.76
(V)
2.13
2.50
RF FREQUENCY (MHz)
V
PLVLSET
Maxim Integrated
8
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Functional Block Diagram
GND
15
GND
14
GND
13
ALM
12
GND
11
ALM_THRES 16
CTRL1 17
10 GND
9
GND
MAX2090
GND 18
8
7
DET_VIN
GND
RF_OUT 19
V
20
CC_RF
6
AMP_OUT
EXPOSED PAD
+
1
2
3
4
5
R_BIAS
PLVLSET
CTRL2
V
CC_A
RF_IN
Maxim Integrated
9
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Pin Configuration
TOP VIEW
15
14
13
12
11
GND
GND
10
9
ALM_THRES 16
CTRL1 17
MAX2090
8
GND 18
DET_VIN
GND
RF_OUT
7
19
20
6
AMP_OUT
V
CC_RF
EP*
+
1
2
3
4
5
TQFN
(5mm x 5mm)
EP = EXPOSED PAD
Pin Description
PIN
1
NAME
R_BIAS
PLVLSET
CTRL2
FUNCTION
Bias Resistor Setting Input. Connect a resistor from this pin to ground.
AGC Loop Threshold-Level Input/Attenuator Control
Functional Control Bit (see Table 1)
2
3
4
V
Power-Supply Input. Bypass to ground with a 10nF capacitor as close as possible to the pin.
Attenuator Input (50I). Requires a DC-blocking capacitor.
Error Amplifier Output
CC_A
5
RF_IN
6
AMP_OUT
DET_VIN
8
Error Amplifier Input Voltage from an External Detector
7, 9, 10, 11,
13, 14, 15, 18
GND
ALM
Ground
12
16
17
19
Alarm Logic Output
ALM_THRES Alarm Threshold Voltage Input. See the Alarm Operation section for operation details.
CTRL1
Functional Control Bit (see Table 1)
RF_OUT
RF 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.
20
—
V
CC_RF
Exposed Pad. Internally connected to ground. Connect to GND for proper RF performance and
enhanced thermal dissipation.
EP
Maxim Integrated
10
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Closed-ALC Mode Operation
Closed-ALC mode operation consists of setting CTRL1 =
Detailed Description
The MAX2090 is a high-linearity analog VGA designed
to interface with 50I systems operating in the 50MHz
to 1000MHz frequency range. An external analog con-
trol voltage controls the analog attenuator. The device
features a gain range of -10.9dB to +26.1dB, a noise
figure of 4dB, OIP3 linearity of +38dBm, and a wide RF
bandwidth. Each of these features makes the device an
ideal VGA for numerous receiver and transmitter appli-
cations. In addition, the device operates from a single
+5.0V supply.
CTRL2 = logic 1. In this mode, the DET_IN input is driven
from an external detector through R7. Ideally, a power
detector with an output voltage range of 0.1V to 2.4V
DC is recommended, but the MAX2090 operates with
any detector whose output ranges from 0 to 2.5V DC.
PLVLSET is used to set the RF_OUT power by comparing
it to the DET_VIN (pin 8) voltage in the error amplifier. As
PLVLSET increases, the power at RF_OUT also increas-
es. Components R5, C8, and C9 are installed to set the
response time of the loop. See the Typical Application
Circuit. This loops acts to maintain the input power to
the external detector by driving the attenuator in servo
fashion as the power level into RF_IN changes. PLVLSET
can be externally driven to a DC value between 0 and
2.5V, such that the desired power is present at RF_OUT.
Applications Information
Modes of Operation
The device can operate in several different modes, as
summarized in Table 1.
Control Inputs
The MAX2090 has four control inputs: CTRL1, CTRL2,
VGA-Only Mode Operation
VGA-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
attenuator and subsequently the RF_OUT power to any
desired value. The output power at RF_OUT increases at a
rate of 19.5dB/V as PLVLSET is increased. The error ampli-
fier and alarm are powered off in this mode, reducing the
supply current by 10mA typical. In VGA-only mode, com-
ponents R5, R7, C8, C9, and C16 can be left unpopulated.
ALM_THRES, and PLVLSET. V
must be present before
CC
voltages are applied to these pins. In cases where this
is not possible, a 200I resistor must be included in
series with the control inputs to limit on-chip ESD diode
conduction. CTRL1 and CTRL2 are 3V logic controls and
cannot be driven from 5V logic. In the case where no
logic control is available and a logic-high is required, a
voltage-divider can be used from the 5V VCC supply to
produce the 3V logic-high.
Table 1. Mode Control Logic
ERROR
AMPLIFIER
CTRL1
CTRL2
VGA
ALC LOOP
ALARM
FUNCTION DESCRIPTION
Power-down mode
0
0
Disabled
Disabled
Disabled
Disabled
Closed-ALC mode: ALC loop locks
DET_VIN to PLVLSET
1
1
Enabled
Enabled
Enabled
Enabled
1
0
0
1
Enabled
—
Disabled
—
Disabled
—
Disabled
—
VGA-only mode
Factory test mode (do not use)
Maxim Integrated
11
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Alarm Operation
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.
Layout Considerations
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.
Table 2. Typical Application Circuit Component Values
MODE OF OPERATION
COMPONENT
VALUE
SIZE
SUPPLIER
DESCRIPTION
VGA
ONLY
CLOSED
ALC
C1, C5
C2, C3
C8
√
√
√
√
√
1000pF
0.01FF
0402
0402
0603
0402
0402
0402
Murata
Murata
Murata
Murata
—
C0G dielectric
X7R dielectric
X7R dielectric
C0G dielectric
—
√
—
—
—
—
100nF
C9
820pF
C14*
C16
Do not install
0.01FF
√
√
Murata
X7R dielectric
Ferrite LS series
5% tolerance
L1
√
330nH
0603
Coilcraft
R1
R5
√
—
—
√
√
√
√
√
1.78kI
150I
24kI
0I
0402
0402
0402
0402
Panasonic
Panasonic
Panasonic
Panasonic
1% tolerance
1% tolerance
5% tolerance
1% tolerance
R7
R11*
20-pin TQFN
(5mm x
U1
√
√
—
Maxim
MAX2090ETP+
5mm)
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
12
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Typical Application Circuit
15
14
13
12
11
C16
ALM_THRES
CTRL1
GND
10
9
16
17
18
19
20
GND
MAX2090
DET_IN
R7
DET_VIN
GND
8
C5
RF_OUT
GND
7
RF_OUT
L1
C8
V
V
CC_RF
CC
R5
AMP_OUT
EXPOSED PAD
6
C9
C3
+
1
2
3
4
5
V
CC
C1
R1
C2
C14
R11
Ordering Information
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PART
TEMP RANGE
-40NC to +95NC
-40NC to +95NC
PIN-PACKAGE
20 TQFN-EP*
20 TQFN-EP*
MAX2090ETP+
MAX2090ETP+T
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
20 TQFN-EP
T2055+5
21-0140
90-0010
Chip Information
PROCESS: SiGe BiCMOS
Maxim Integrated
13
MAX2090
50MHz to 1000MHz Analog VGA with Threshold
Alarm Circuit and Error Amplifier for Level Control
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
9/11
Initial release
—
1–14
1
Updated existing data sheet to remove references to detector circuit,
added 26 new TOCs, updated Electrical Characteristics table, updated Tables 1
and 2
1
2
9/12
5/15
Removed military reference from data sheet
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
14
©
2015 Maxim Integrated Products, Inc.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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