MAX9930_V01 [MAXIM]
2MHz to 1.6GHz 45dB RF-Detecting Controllers and RF Detector;
| 型号： | MAX9930_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 2MHz to 1.6GHz 45dB RF-Detecting Controllers and RF Detector |
| 文件： | 总16页 (文件大小：2032K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
General Description
Features
●
The MAX9930–MAX9933 low-cost, low-power logarithmic
amplifiers are designed to control RF power amplifiers
(PA) and transimpedance amplifiers (TIA), and to detect
RF power levels. These devices are designed to operate
in the 2MHz to 1.6GHz frequency range. A typical dynam-
ic range of 45dB makes this family of logarithmic ampli-
fiers useful in a variety of wireless and GPON fiber video
applications such as transmitter power measurement, and
RSSI for terminal devices. Logarithmic amplifiers provide
much wider measurement range and superior accuracy to
controllers based on diode detectors. Excellent tempera-
ture stability is achieved over the full operating range of
-40°C to +85°C.
Complete RF-Detecting PA Controllers
(MAX9930/MAX9931/MAX9932)
●
●
Complete RF Detector (MAX9933)
Variety of Input Ranges
MAX9930/MAX9933: -58dBV to -13dBV
(-45dBm to 0dBm for 50Ω Termination)
MAX9931: -48dBV to -3dBV
(-35dBm to +10dBm for 50Ω Termination)
MAX9932: -43dBV to +2dBV
(-30dBm to +15dBm for 50Ω Termination)
●
●
●
●
●
●
●
2MHz to 1.6GHz Frequency Range
Temperature Stable Linear-in-dB Response
Fast Response: 70ns 10dB Step
10mA Output Sourcing Capability
Low Power: 17mW at 3V (typ)
The choice of three different input voltage ranges elimi-
nates the need for external attenuators, thus simplifying
PA control-loop design. The logarithmic amplifier is a
voltage-measuring device with a typical signal range of
-58dBV to -13dBV for the MAX9930/MAX9933, -48dBV
to -3dBV for the MAX9931, and -43dBV to +2dBV for the
MAX9932.
13μA (typ) Shutdown Current
Available in a Small 8-Pin μMAX Package
The MAX9930–MAX9933 require an external coupling
capacitor in series with the RF input port. These devices
feature a power-on delay when coming out of shutdown,
holding OUT low for approximately 2.5μs to ensure
glitch-free controller output.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
8 µMAX
MAX9930EUA+T
MAX9931EUA+T
MAX9932EUA+T
MAX9933EUA+T
MAX9933BGUA+T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +105°C
8 µMAX
The MAX9930–MAX9933 family is available in an 8-pin
8 µMAX
®
μMAX package. These devices consume 7mA with a
8 µMAX
5V supply, and when powered down, the typical shut-
down current is 13μA.
8 µMAX
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Applications
●
●
●
●
●
RSSI for Fiber Modules, GPON-CATV Triplexors
Low-Frequency RF OOK and ASK Applications
Transmitter Power Measurement and Control
TSI for Wireless Terminal Devices
Pin Configurations
TOP VIEW
Cellular Handsets (TDMA, CDMA, GPRS, GSM)
+
+
RFIN
SHDN
SET
1
2
3
4
8
7
6
5
V
RFIN
SHDN
GND
1
2
3
4
8
7
6
5
V
CC
CC
MAX9930
MAX9931
MAX9932
OUT
N.C.
GND
OUT
N.C.
GND
MAX9933
MAX9933B
Block Diagram appears at end of data sheet.
CLPF
CLPF
µMAX
µMAX
μMAX is a registered trademark of Maxim Integrated Products, Inc.
19-0859; Rev 2; 3/15
MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Absolute Maximum Ratings
(Voltages referenced to GND.)
OUT Short Circuit to GND.........................................Continuous
V
..........................................................................-0.3V to +6V
Continuous Power Dissipation (T = +70°C)
CC
A
OUT, SET, SHDN, CLPF.......................... -0.3V to (V
+ 0.3V)
8-Pin μMAX (derate 4.5mW/°C above +70°C)............362mW
Operating Temperature Range........................... -40°C to +85°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
RFIN
MAX9930/MAX9933.....................................................+6dBm
MAX9931....................................................................+16dBm
MAX9932....................................................................+19dBm
Equivalent Voltage
MAX9930/MAX9933................................................0.45V
MAX9931...................................................................1.4V
MAX9932...................................................................2.0V
RMS
RMS
RMS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation 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.
DC Electrical Characteristics
(V
= 3V, SHDN = 1.8V, T = -40°C to +85°C, C
= 100nF, unless otherwise noted. Typical values are at T = +25°C.) (Notes 1 and 6)
CLPF A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.25
12
UNITS
V
Supply Voltage
V
2.70
CC
CC
CC
Supply Current
I
I
V
= 5.25V
7
13
1
mA
µA
mV
V
CC
Shutdown Supply Current
Shutdown Output Voltage
Logic-High Threshold Voltage
Logic-Low Threshold Voltage
SHDN = 0.8V, V = 5V
CC
V
SHDN = 0.8V
OUT
V
1.8
H
V
0.8
30
V
L
SHDN = 3V
SHDN = 0V
5
SHDN Input Current
I
µA
SHDN
-1
-0.01
MAIN OUTPUT (MAX9930/MAX9931/MAX9932)
High, I
= 10mA
2.65
2.75
0.15
8
SOURCE
Voltage Range
V
OUT
V
Low, I
= 350µA
SINK
Output-Referred Noise
Small-Signal Bandwidth
Slew Rate
From CLPF
From CLPF
nV/√Hz
MHz
BW
20
8
V
= 0.2V to 2.6V from CLPF
V/µs
OUT
SET INPUT (MAX9930/MAX9931/MAX9932)
Voltage Range (Note 2)
Input Resistance
V
Corresponding to central 40dB span
0.35
1.45
V
SET
R
30
16
MΩ
V/µs
IN
Slew Rate (Note 3)
DETECTOR OUTPUT (MAX9933/MAX9933B)
RFIN = 0dBm
1.45
0.36
4.5
5
Voltage Range
V
V
OUT
RFIN = -45dBm
Small-Signal Bandwidth
Slew Rate
BW
C
= 150pF
MHz
V/µs
CLPF
V
= 0.36V to 1.45V, C
= 150pF
OUT
CLPF
Maxim Integrated
│ 2
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
AC Electrical Characteristics
(V
= 3V, SHDN = 1.8V, f
= 2MHz to 1.6GHz, T = -40°C to +85°C, C
= 100nF, unless otherwise noted. Typical values are
CC
RF
A
CLPF
at T = +25°C.) (Notes 1 and 6)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
2
TYP
MAX
1600
-13
-3
UNITS
RF Input Frequency Range
f
MHz
RF
MAX9930/MAX9933/MAX9933B
MAX9931
-58
-48
-43
-45
-35
-30
25
RF Input Voltage Range
(Note 4)
V
dBV
dBm
RF
RF
MAX9932
+2
MAX9930/MAX9933/MAX9933B
MAX9931
0
Equivalent Power Range
(50Ω Termination) (Note 4)
P
+10
+15
29
MAX9932
f
f
f
f
f
= 2MHz, T = +25°C
A
27
27
RF
RF
RF
RF
RF
= 2MHz
24
30
Logarithmic Slope
V
23.5
22.5
25.5
25.5
27
27.5
28.5
mV/dB
= 900MHz, T = +25°C
S
A
= 900MHz
= 1600MHz
MAX9930/MAX9933/MAX9933B
-61
-51
-46
-63
-53
-48
-62
-53
-49
-64
-55
-51
-56
-46
-41
-56
-46
-41
-59
-50
-45
-59
-50
-45
-62
-52
-47
-52
-42
-37
-50
-40
-35
-53
-44
-40
-51
-42
-38
f
= 2MHz,
RF
MAX9931
T = +25°C
A
MAX9932
MAX9930/MAX9933/MAX9933B
MAX9931
f
f
= 2MHz
RF
MAX9932
MAX9930/MAX9933/MAX9933B
MAX9931
= 900MHz,
RF
Logarithmic Intercept
P
dBm
X
T = +25°C
A
MAX9932
MAX9930/MAX9933/MAX9933B
MAX9931
f
f
= 900MHz
RF
RF
MAX9932
MAX9930/MAX9933/MAX9933B
= 1600MHz MAX9931
MAX9932
RF INPUT INTERFACE
DC Resistance
R
Connected to V
2
kΩ
DC
CC
Inband Capacitance
C
Internally DC-coupled (Note 5)
0.5
pF
IB
Note 1: All devices are 100% production tested at T = +25°C and are guaranteed by design for T = -40°C to +85°C as specified.
A
A
Note 2: Typical value only, set-point input voltage range determined by logarithmic slope and logarithmic intercept.
Note 3: Set-point slew rate is the rate at which the reference level voltage, applied to the inverting input of the g stage, responds
m
to a voltage step at the SET pin (see Figure 1).
Note 4: Typical min/max range for detector.
Note 5: Pin capacitance to ground.
Note 6: MAX9933B is 100% production tested at T = +25°C and is guaranteed by design for T = -40°C to +105°C as specified.
A
A
Maxim Integrated
│ 3
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics
(V
= 3V, SHDN = V , T = +25°C, all log conformance plots are normalized to their respective temperatures, T = +25°C, unless
CC
CC
A
A
otherwise noted.)
MAX9930
MAX9930
SET vs. INPUT POWER
MAX9930
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 2MHz
LOG CONFORMANCE vs. INPUT POWER
MAX9930 toc03
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
3
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
2MHz
3
900MHz
50MHz
2
2
1.6GHz
900MHz
1
1
0
0
1.6GHz
-1
-2
-3
-4
-1
-2
-3
-4
50MHz
2MHz
T
= -40°C
A
T
= +25°C
= +85°C
A
T
A
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
MAX9930
MAX9930
MAX9930
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 50MHz
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 900MHz
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 1.6GHz
MAX9930 toc06
MAX9930 toc04
MAX9930 toc05
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
4
4
3
3
3
2
2
2
1
1
1
0
0
0
-1
-2
-3
-4
-1
-2
-3
-4
T
= -40°C
= +25°C
-1
-2
-3
-4
A
T
= -40°C
T = -40°C
A
A
T
A
T
A
= +25°C
T
A
= +25°C
T
A
= +85°C
T = +85°C
A
T
= +85°C
A
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
MAX9930
MAX9930
MAX9930
LOG SLOPE vs. FREQUENCY
LOG SLOPE vs. V
LOG INTERCEPT vs. FREQUENCY
CC
27
26
25
24
23
22
21
29
28
27
26
25
24
23
22
-60
-62
-64
-66
-68
T
= +25°C
A
T
= +25°C
A
T
= -40°C
A
2MHz
1.6GHz
T
= +85°C
A
50MHz
5.0
T
= +85°C
600
A
900MHz
T
= -40°C
A
0
300
900 1200 1500 1800
2.5
3.0
3.5
4.0
(V)
4.5
5.5
0
400
800
1200
1600
FREQUENCY (MHz)
V
CC
FREQUENCY (MHz)
Maxim Integrated
│
4
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics (continued)
(V
= 3V, SHDN = V , T = +25°C, all log conformance plots are normalized to their respective temperatures, T = +25°C, unless
CC
CC
A
A
otherwise noted.)
MAX9930
MAX9930
MAX9931
LOG INTERCEPT vs. V
LOG CONFORMANCE vs. TEMPERATURE
SET vs. INPUT POWER
CC
-57
-59
-61
-63
-65
-67
-69
-71
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
INPUT POWER = -22dBm
f
RF
= 50MHz
2MHz
1.6GHz
50MHz
2MHz
50MHz
900MHz
900MHz
1.6GHz
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
-50
-25
0
25
50
75
100
-50 -40 -30 -20 -10
0
10
20
V
TEMPERATURE (°C)
INPUT POWER (dBm)
CC
MAX9931
MAX9931
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 2MHz
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 50MHz
LOG CONFORMANCE vs. INPUT POWER
MAX9930 toc14
MAX9930 toc15
4
3
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
4
2MHz
3
3
2
2
2
900MHz
50MHz
1
1
1
0
0
0
1.6GHz
-1
-2
-3
-4
-1
-2
-3
-4
-1
-2
-3
-4
T
= -40°C
A
T
T
= -40°C
= +25°C
A
T
A
= +25°C
= +85°C
A
T
A
T
A
= +85°C
-50 -40 -30 -20 -10
0
10
20
-50 -40 -30 -20 -10
0
10
20
-50 -40 -30 -20 -10
0
10
20
INPUT POWER (dBm)
INPUT POWER (dBm)
INPUT POWER (dBm)
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 900MHz
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 1.6GHz
MAX9931
LOG SLOPE vs. FREQUENCY
MAX9930 toc16
MAX9930 toc17
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
29
28
27
26
25
24
23
4
4
3
3
T
= +85°C
A
2
2
T
A
= +25°C
1
1
0
0
-1
-2
-3
-4
-1
-2
-3
-4
T
= -40°C
= +25°C
= +85°C
T
= -40°C
A
A
T
= -40°C
A
T
A
T
A
= +25°C
= +85°C
T
A
T
A
-50 -40 -30 -20 -10
0
10
20
-50 -40 -30 -20 -10
0
10
20
0
300
600
900 1200 1500 1800
INPUT POWER (dBm)
INPUT POWER (dBm)
FREQUENCY (MHz)
Maxim Integrated
│ 5
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics (continued)
(V
= 3V, SHDN = V , T = +25°C, all log conformance plots are normalized to their respective temperatures, T = +25°C, unless
CC
CC
A
A
otherwise noted.)
MAX9931
MAX9931
MAX9931
LOG SLOPE vs. V
LOG INTERCEPT vs. FREQUENCY
LOG INTERCEPT vs. V
CC
CC
29
28
27
26
25
24
23
22
-48
-50
-52
-54
-56
-58
-60
-62
-46
-48
-50
-52
-54
2MHz
T
= -40°C
2MHz
A
1.6GHz
900MHz
50MHz
T
= +85°C
A
1.6GHz
T
A
= +25°C
800
50MHz
5.0
900MHz
2.5
3.0
3.5
4.0
(V)
4.5
5.5
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
0
400
1200
1600
V
CC
V
FREQUENCY (MHz)
CC
MAX9931
MAX9932
MAX9932
LOG CONFORMANCE vs. TEMPERATURE
SET vs. INPUT POWER
LOG CONFORMANCE vs. INPUT POWER
0.2
0.1
0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
3
INPUT POWER = -12dBm
50MHz
f
= 50MHz
RF
900MHz
2
1.6GHz
2MHz
1
-0.1
-0.2
-0.3
-0.4
0
50MHz
900MHz
-1
-2
-3
-4
1.6GHz
2MHz
-50
-25
0
25
50
75
100
-40
-30
-20
-10
0
10
20
-40
-30
-20
-10
0
10
20
TEMPERATURE (°C)
INPUT POWER (dBm)
INPUT POWER (dBm)
MAX9932
MAX9932
MAX9932
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 900MHz
MAX9930 toc27
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 2MHz
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 50MHz
MAX9930 toc25
MAX9930 toc26
4
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
T
A
= +85°C
3
3
3
T
= +25°C
= -40°C
A
2
2
2
T
A
1
1
1
0
0
0
T
= -40°C
= +25°C
T
A
= +85°C
A
-1
-2
-3
-4
-1
-2
-3
-4
-1
-2
-3
-4
T
A
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
-40
-30
-20
-10
0
10
20
-40
-30
-20
-10
0
10
20
-40
-30
-20
-10
0
10
20
INPUT POWER (dBm)
INPUT POWER (dBm)
INPUT POWER (dBm)
Maxim Integrated
│
6
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics (continued)
(V
= 3V, SHDN = V , T = +25°C, all log conformance plots are normalized to their respective temperatures, T = +25°C, unless
CC
CC
A
A
otherwise noted.)
MAX9932
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 1.6GHz
MAX9932
LOG SLOPE vs. FREQUENCY
MAX9932
LOG SLOPE vs. V
CC
MAX9930 toc28
29
28
27
26
25
24
23
22
4
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
29
28
27
26
25
24
23
3
T
A
= +85°C
2
2MHz
1
1.6GHz
T
= +25°C
A
0
50MHz
-1
-2
-3
-4
T
= +85°C
= +25°C
A
T
= -40°C
A
900MHz
T
A
T
A
= -40°C
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
-40
-30
-20
-10
0
10
20
0
300
600
900 1200 1500 1800
V
INPUT POWER (dBm)
FREQUENCY (MHz)
CC
MAX9932
MAX9932
MAX9932
LOG INTERCEPT vs. FREQUENCY
LOG INTERCEPT vs. V
LOG CONFORMANCE vs. TEMPERATURE
CC
-41
-43
-45
-47
-49
-51
-53
-55
-40
-42
-44
-46
-48
0.1
0
INPUT POWER = -10dBm
f
RF
= 50MHz
50MHz
T
= -40°C
A
-0.1
-0.2
-0.3
-0.4
-0.5
T
= +85°C
A
2MHz
900MHz
T
= +25°C
A
1.6GHz
4.0
2.5
3.0
3.5
4.5
5.0
5.5
0
400
800
1200
1600
-50
-25
0
25
50
75
100
V
CC
(V)
FREQUENCY (MHz)
TEMPERATURE (°C)
MAX9933B
OUTPUT AND LOG CONFORMANCE
vs. INPUT POWER AT 2MHz
MAX9933
OUT vs. INPUT POWER
MAX9933
LOG CONFORMANCE vs. INPUT POWER
toc36
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4
3
1.8
1.6
1.4
1.2
1
4
2MHz
3
1.6GHz
2
2
900MHz
50MHz
1
1
0
0
900MHz
0.8
0.6
0.4
0.2
-1
-2
-3
-4
-1
-2
-3
-4
50MHz
2MHz
1.6GHz
TA = +105°C
TA = +85°C
TA = +25°C
TA = -40°C
-60
-50
-40
-30
-20
-10
0
10
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
-60 -50 -40 -30 -20 -10
INPUT POWER (dBm)
0
10
INPUT POWER (dBm)
Maxim Integrated
│
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics (continued)
(V
= 3V, SHDN = V , T = +25°C, all log conformance plots are normalized to their respective temperatures, T = +25°C, unless
CC
CC
A
A
otherwise noted.)
MAX9933B
MAX9933B
MAX9933B
OUTPUT AND LOG CONFORMANCE
vs. INPUT POWER AT 50MHz
OUTPUT AND LOG CONFORMANCE
vs. INPUT POWER AT 900MHz
OUTPUT AND LOG CONFORMANCE
vs. INPUT POWER AT 1.6GHz
toc37
toc38
toc39
1.8
1.6
1.4
1.2
1
4
1.8
1.6
1.4
1.2
1
4
1.8
1.6
1.4
1.2
1
4
3
3
3
2
2
2
1
1
1
0
0
0
TA = +105°C
TA = +85°C
TA = +105°C
TA = +85°C
TA = +25°C
TA = -40°C
0.8
0.6
0.4
0.2
-1
-2
-3
-4
0.8
0.6
0.4
0.2
-1
-2
-3
-4
0.8
0.6
0.4
0.2
-1
-2
-3
-4
TA = +105°C
TA = +85°C
TA = +25°C
TA = -40°C
TA = +25°C
TA = -40°C
-60
-50
-40
-30
-20
-10
0
10
-60
-50
-40
-30
-20
-10
0
10
-60
-50
-40
-30
-20
-10
0
10
INPUT POWER (dBm)
INPUT POWER (dBm)
INPUT POWER (dBm)
MAX9933
LOG SLOPE vs. V
MAX9933B
LOG SLOPE vs. FREQUENCY
MAX9933B
LOG INTERCEPT vs. FREQUENCY
CC
toc40
toc42
29
28
27
26
25
24
23
29
28
27
26
25
24
23
22
-52
-54
-56
-58
-60
-62
-64
1.6GHz
TA = +105°C
TA = +85°C
TA = -40°C
TA = +25°C
50MHz
900MHz
TA = +25°C
TA = -40°C
2MHz
TA = +85°C
TA = +105°C
0
300
600
900
1200 1500 1800
0
300
600
900
1200 1500 1800
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
FREQUENCY (MHz)
FREQUENCY (MHz)
V
CC
MAX9933B
LOG CONFORMANCE vs. TEMPERATURE
MAX9933
LOG INTERCEPT vs. V
SUPPLY CURRENT
vs. SHDN VOLTAGE
CC
toc44
0.2
0.1
0
-52
-54
-56
-58
-60
-62
-64
-66
8
7
INPUT POWER = -22dBm
fRF = 50MHz
V
= 5.25V
CC
2MHz
6
5
4
50MHz
3
-0.1
-0.2
-0.3
2
900MHz
1
1.6GHz
0
-1
-50
-25
0
25
50
75
100 125
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
SHDN (V)
TEMPERATURE (°C)
V
CC
Maxim Integrated
│ 8
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics (continued)
(V
= 3V, SHDN = V , T = +25°C, all log conformance plots are normalized to their respective temperatures, T = +25°C, unless
CC A A
CC
otherwise noted.)
SHDN POWER-ON DELAY
RESPONSE TIME
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9930 toc47
8.0
C
CLPF
= 150pF
7.8
7.6
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
SHDN
500mV/div
0V
0V
OUT
1V/div
2µs/div
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
MAXIMUM OUT VOLTAGE
SHDN RESPONSE TIME
MAIN OUTPUT NOISE-SPECTRAL DENSITY
vs. V BY LOAD CURRENT
CC
MAX9930 toc48
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
10,000
CLPF = 150pF
MAX9933
CLPF = 220pF
SHDN
1V/div
0mA
0V
0V
1000
10mA
5mA
OUT
00mV/div
100
2µs/div
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
100
1k
10k
100k
1M
10M
V
FREQUENCY (Hz)
CC
LARGE-SIGNAL
SMALL-SIGNAL
PULSE RESPONSE
PULSE RESPONSE
MAX9930 toc51
MAX9930 toc52
C
CLPF
= 10,000pF
C
CLPF
= 150pF
OUT
500mV/div
OUT
75mV/div
≤ 900mV
≤ 0V
f
= 50MHz
f
RF
= 50MHz
RF
RFIN
RFIN
250mV/div
25mV/div
-42dBm
-24dBm
-2dBm
-18dBm
10µs/div
1µs/div
Maxim Integrated
│
9
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Pin Description
PIN
MAX9930/
MAX9931/
MAX9932
NAME
FUNCTION
MAX9933
1
2
3
1
2
RFIN
SHDN
SET
RF Input
Shutdown. Connect to V
Set-Point Input
for normal operation.
CC
—
Lowpass Filter Connection. Connect external capacitor between CLPF and GND to set
control-loop bandwidth.
4
4
CLPF
5
6
7
8
3, 5
6
GND
N.C.
OUT
Ground
No Connection. Not internally connected.
PA Gain-Control Output
7
8
V
Supply Voltage. Bypass to GND with a 0.1µF capacitor.
CC
SHDN
OUTPUT-
ENABLED
DELAY
V
CC
g
m
OUT
X1
DET
DET
DET
DET
DET
CLPF
RFIN
10dB
10dB
10dB
10dB
SET
V-I*
OFFSET
COMP
REFERENCE
CURRENT
MAX9930
MAX9931
MAX9932
GND
SHDN
OUTPUT-
ENABLED
DELAY
V
CC
g
m
OUT
X1
DET
DET
DET
DET
DET
CLPF
RFIN
GND
10dB
10dB
10dB
10dB
V-I*
OFFSET
COMP
REFERENCE
CURRENT
MAX9933
*INVERTING VOLTAGE TO CURRENT CONVERTER
Figure 1. Functional Diagram
Maxim Integrated
│ 10
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Extrapolating a straight-line fit of the graph of SET vs.
RFIN provides the logarithmic intercept. Logarithmic
slope, the amount SET changes for each dB change of
RF input, is generally independent of waveform or termi-
nation impedance. The MAX9930/MAX9931/MAX9932
slope at low frequencies is about 25mV/dB.
Detailed Description
The MAX9930–MAX9933 family of logarithmic ampli-
fiers (log amps) comprises four main amplifier/limiter
stages each with a small-signal gain of 10dB. The output
stage of each amplifier is applied to a full-wave rectifier
(detector). A detector stage also precedes the first gain
stage. In total, five detectors, each separated by 10dB,
comprise the log amp strip. Figure 1 shows the functional
diagram of the log amps.
Variance in temperature and supply voltage does not alter
the slope significantly as shown in the Typical Operating
Characteristics.
The MAX9930/MAX9931/MAX9932 are specifically
designed for use in PA control applications. In a control
loop, the output starts at approximately 2.9V (with supply
voltage of 3V) for the minimum input signal and falls to a
value close to ground at the maximum input. With a por-
tion of the PA output power coupled to RFIN, apply a volt-
age to SET (for the MAX9930/MAX9931/MAX9932) and
connect OUT to the gain-control pin of the PA to control its
output power. An external capacitor from CLPF to ground
sets the bandwidth of the PA control loop.
A portion of the PA output power is coupled to RFIN of the
logarithmic amplifier controller/detector, and is applied to
the logarithmic amplifier strip. Each detector cell outputs
a rectified current and all cell currents are summed and
form a logarithmic output. The detected output is applied
to a high-gain g stage, which is buffered and then
m
applied to OUT. For the MAX9930/MAX9931/MAX9932,
OUT is applied to the gain-control input of the PA to
close the control loop. The voltage applied to SET deter-
mines the output power of the PA in the control loop. The
voltage applied to SET relates to an input power level
determined by the log amp detector characteristics. For
the MAX9933, OUT is applied to an ADC typically found
in a baseband IC which, in turn, controls the PA biasing
with the output (Figure 2).
Transfer Function
Logarithmic slope and intercept determine the trans-
fer function of the MAX9930–MAX9933 family of log
amps. The change in SET voltage (OUT voltage for the
MAX9933) per dB change in RF input defines the logarith-
mic slope. Therefore, a 10dB change in RF input results
in a 250mV change at SET (OUT for the MAX9933). The
Log Conformance vs. Input Power plots (see Typical
Operating Characteristics) show the dynamic range of the
log amp family. Dynamic range is the range for which the
error remains within a band of ±1dB.
PA
TRANSMITTER
XX
DAC
The intercept is defined as the point where the linear
response, when extrapolated, intersects the y-axis of
the Log Conformance vs. Input Power plot. Using these
parameters, the input power can be calculated at any SET
voltage level (OUT voltage level for the MAX9933) within
the specified input range with the following equations:
V
50Ω
CC
C
C
BASEBAND
IC
RFIN
V
CC
0.01µF
MAX9933
50Ω
SHDN
ADC
OUT
N.C.
RFIN = (SET / SLOPE) + IP
GND
(MAX9930/MAX9931/MAX9932)
CLPF
GND
RFIN = (OUT / SLOPE) + IP
(MAX9933)
C
CLPF
where SET is the set-point voltage, OUT is the output
voltage for the MAX9933, SLOPE is the logarithmic slope
(V/dB), RFIN is in either dBm or dBV and IP is the loga-
rithmic intercept point utilizing the same units as RFIN.
Figure 2. MAX9933 Typical Application Circuit
Maxim Integrated
│ 11
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
voltage can range from 150mV to within 250mV of the
positive supply rail while sourcing 10mA. Use a suitable
load resistor between OUT and GND for PA control inputs
that source current. The Typical Operating Characteristics
Applications Information
Controller Mode
(MAX9930/MAX9931/MAX9932)
Figure 3 provides a circuit example of the MAX9930/
MAX9931/MAX9932 configured as a controller. The
MAX9930/MAX9931/MAX9932 require a 2.7V to 5.25V
supply voltage. Place a 0.1μF low-ESR, surface-mount
has the Maximum Out Voltage vs. V
By Load Current
CC
graph that shows the sourcing capabilities and output
swing of OUT.
SHDN and Power-On
ceramic capacitor close to V
to decouple the supply.
CC
The MAX9930–MAX9933 can be placed in shutdown
by pulling SHDN to ground. Shutdown reduces supply
current to typically 13μA. A graph of SHDN Response
Time is included in the Typical Operating Characteristics.
Electrically isolate the RF input from other pins (espe-
cially SET) to maximize performance at high frequencies
(especially at the high-power levels of the MAX9932).
The MAX9930/MAX9931/MAX9932 require external
AC-coupling. Achieve 50Ω input matching by connecting
a 50Ω resistor between the AC-coupling capacitor of RFIN
and ground.
Connect SHDN and V
operation.
together for continuous on
CC
Power Convention
The MAX9930/MAX9931/MAX9932 logarithmic amplifiers
function as both the detector and controller in power-
control loops. Use a directional coupler to couple a portion
of the PA’s output power to the log amp’s RF input. For
applications requiring dual-mode operation and where
there are two PAs and two directional couplers, passively
combine the outputs of the directional couplers before
applying to the log amp. Apply a set-point voltage to SET
from a controlling source (usually a DAC). OUT, which
drives the automatic gain-control input of the PA, cor-
rects any inequality between the RF input level and the
corresponding set-point level. This is valid assuming the
gain control of the variable gain element is positive, such
that increasing OUT voltage increases gain. The OUT
Expressing power in dBm, decibels above 1mW, is the
most common convention in RF systems. Log amp input
levels specified in terms of power are a result of the fol-
lowing common convention. Note that input power does
not refer to power, but rather to input voltage relative to
a 50Ω impedance. Use of dBV, decibels with respect
to a 1V
sine wave, yields a less ambiguous result.
RMS
The dBV convention has its own pit-falls in that log amp
response is also dependent on waveform. A complex
input, such as CDMA, does not have the exact same
output response as the sinusoidal signal. The MAX9930–
MAX9933 performance specifications are in both dBV
and dBm, with equivalent dBm levels for a 50Ω environ-
ment. To convert dBV values into dBm in a 50Ω network,
add 13dB. For CATV applications, to convert dBV values
to dBm in a 75Ω network, add 11.25dB. Table 1 shows the
different input power ranges in different conventions for
the MAX9930–MAX9933.
ANTENNA
POWER AMPLIFIER
RF INPUT
XX
Table 1. Power Ranges of the MAX9930–
MAX9933
C
C
50Ω
RFIN
V
V
CC
CC
INPUT POWER RANGE
MAX9930
MAX9931
MAX9932
0.1µF
PART
dBm IN A 50Ω
dBm IN A 75Ω
dBV
NETWORK
NETWORK
SHDN
SET
OUT
N.C.
DAC
MAX9930 -58 to -13
-45 to 0
-35 to +10
-30 to +15
-45 to 0
-46.75 to -1.75
-36.75 to +8.25
-31.75 to +13.25
-46.75 to -1.75
MAX9931
MAX9932
-48 to -3
-43 to +2
CLPF
GND
C
CLPF
MAX9933 -58 to -13
Figure 3. Control Mode Application Circuit Block
Maxim Integrated
│ 12
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
attenuation. A broadband resistive match is implement-
ed by connecting a resistor to ground at the external
AC-coupling capacitor at RFIN as shown in Figure 5. A
50Ω resistor (use other values for different input imped-
ances) in this configuration, in parallel with the input
impedance of the MAX9930–MAX9933, presents an input
impedance of approximately 50Ω. These devices require
an additional external coupling capacitor in series with
the RF input. As the operating frequency increases over
2GHz, input impedance is reduced, resulting in the need
for a larger-valued shunt resistor. Use a Smith Chart for
calculating the ideal shunt resistor value. Refer to the
MAX4000/MAX4001/MAX4002 data sheet for narrow-
band reactive and series attenuation input coupling.
Filter Capacitor and Transient Response
In general, for the MAX9930/MAX9931/MAX9932, the
choice of filter capacitor only partially determines the
time-domain response of a PA control loop. However,
some simple conventions can be applied to affect tran-
sient response. A large filter capacitor, C
, dominates
CLPF
time-domain response, but the loop bandwidth remains
a factor of the PA gain-control range. The bandwidth is
maximized at power outputs near the center of the PA’s
range, and minimized at the low and high power levels,
where the slope of the gain-control curve is lowest.
A smaller valued C
results in an increased loop
CLPF
bandwidth inversely proportional to the capacitor value.
Inherent phase lag in the PA’s control path, usually caused
by parasitics at OUT, ultimately results in the addition of
complex poles in the AC loop equation. To avoid this sec-
ondary effect, experimentally determine the lowest usable
MAX9930
MAX9931
MAX9932
C
for the power amplifier of interest. This requires full
CLPF
50 SOURCE
consideration to the intricacies of the PA control function.
The worst-case condition, where the PA output is small-
est (gain function is steepest) should be used because
the PA control function is typically nonlinear. An additional
zero can be added to improve loop dynamics by placing
MAX9933
C
C
50Ω
RFIN
R
50Ω
S
C
IN
R
IN
a resistor in series with C
. See Figure 4 for the gain
CLPF
and phase response for different C
values.
CLPF
V
CC
Additional Input Coupling
There are three common methods for input coupling:
broadband resistive, narrowband reactive, and series
Figure 5. Broadband Resistive Matching
GAIN AND PHASE vs. FREQUENCY
SMALL-SIGNAL BANDWIDTH vs. C
CLPF
MAX9930 fig04
80
60
180
135
90
10
GAIN
C
CLPF
= 2000pF
40
C
= 200pF
CLPF
20
45
1
0.1
C
= 200pF
CLPF
0
0
-20
-40
-60
-80
-100
-45
-90
-135
-180
-225
C
= 2000pF
CLPF
PHASE
0.01
10 100 1k 10k 100k 1M 10M 100M
100
1000
10,000
(pF)
100,000
FREQUENCY (Hz)
C
CLPF
Figure 4. Gain and Phase vs. Frequency
Maxim Integrated
│ 13
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Waveform Considerations
Block Diagram
The MAX9930–MAX9933 family of logarithmic amplifiers
respond to voltage, not power, even though input levels
are specified in dBm. It is important to realize that input
signals with identical RMS power but unique waveforms
result in different log amp outputs. Differing signal wave-
forms result in either an upward or downward shift in
the logarithmic intercept. However, the logarithmic slope
remains the same; it is possible to compensate for known
waveform shapes by baseband process.
OUTPUT-
ENABLE
DELAY
SHDN
V
CC
LOG
DETECTOR
RFIN
SET
g
m
x1
OUT
BLOCK
V-I*
BUFFER
It must also be noted that the output waveform is gener-
ated by first rectifying and then averaging the input signal.
This method should not be confused with RMS or peak-
detection methods.
MAX9930
MAX9931
MAX9932
C
CLPF
GND
Layout Considerations
As with any RF circuit, the layout of the MAX9930–
MAX9933 circuits affects performance. Use a short 50Ω
line at the input with multiple ground vias along the length
of the line. The input capacitor and resistor should both
OUTPUT-
ENABLE
DELAY
SHDN
V
CC
LOG
DETECTOR
RFIN
be placed as close as possible to the IC. V
should be
CC
g
bypassed as close as possible to the IC with multiple vias
connecting the capacitor to the ground plane. It is recom-
mended that good RF components be chosen for the
desired operating frequency range. Electrically isolate
RF input from other pins (especially SET) to maximize
performance at high frequencies (especially at the
high power levels of the MAX9932).
m
x1
OUT
BLOCK
BUFFER
MAX9933
V-I*
C
CLPF
GND
*INVERTING VOLTAGE TO CURRENT CONVERTER.
Chip Information
PROCESS: High-Frequency Bipolar
Maxim Integrated
│ 14
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Package Information
For the latest package outline information and land patterns (footprints), 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.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
21-0036
LAND PATTERN NO.
90-0092
8 μMAX
U8-1
Maxim Integrated
│ 15
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MAX9930–MAX9933
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
8/07
3/09
3/15
0
1
2
Initial release
—
Added TOC46 to Typical Operating Characteristics
Added information for the MAX9933B. Revised Typical Operating Characteristics.
9
1–3, 7, 8, 15
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2015 Maxim Integrated Products, Inc.
│ 16
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