MAX9933 Maxim, MAX9933 Datasheet

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MAX9933

Manufacturer Part Number
MAX9933
Description
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
Manufacturer
Maxim
Datasheet

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The MAX9930–MAX9933 low-cost, low-power logarith-
mic amplifiers are designed to control RF power ampli-
fiers (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 typi-
cal dynamic range of 45dB makes this family of logarith-
mic amplifiers useful in a variety of wireless and GPON
fiber video applications such as transmitter power mea-
surement, and RSSI for terminal devices. Logarithmic
amplifiers provide much wider measurement range and
superior accuracy to controllers based on diode detec-
tors. Excellent temperature stability is achieved over the
full operating range of -40°C to +85°C.
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.
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.
The MAX9930–MAX9933 family is available in an 8-pin
µMAX
5V supply, and when powered down, the typical shut-
down current is 13µA.
19-0859; Rev 1; 3/09
Block Diagram appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
RSSI for Fiber Modules, GPON-CATV Triplexors
Low-Frequency RF OOK and ASK Applications
Transmitter Power Measurement and Control
TSI for Wireless Terminal Devices
Cellular Handsets (TDMA, CDMA, GPRS, GSM)
®
package. These devices consume 7mA with a
________________________________________________________________ Maxim Integrated Products
General Description
2MHz to 1.6GHz 45dB RF-Detecting
Applications
Controllers and RF Detector
♦ Complete RF-Detecting PA Controllers
♦ Complete RF Detector (MAX9933)
♦ Variety of Input Ranges
♦ 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)
♦ 13µA (typ) Shutdown Current
♦ Available in a Small 8-Pin µMAX Package
+ Denotes a lead-free package.
T = Tape and reel.
TOP VIEW
MAX9930EUA+T
MAX9931EUA+T
MAX9932EUA+T
MAX9933EUA+T
SHDN
(MAX9930/MAX9931/MAX9932)
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)
CLPF
RFIN
SET
1
2
3
4
PART
+
MAX9930
MAX9931
MAX9932
µMAX
8
7
6
5
Ordering Information
TEMP RANGE
-40
-40
-40
-40
V
OUT
N.C.
GND
CC
Pin Configurations
o
o
o
o
C to +85
C to +85
C to +85
C to +85
SHDN
CLPF
RFIN
GND
o
o
o
o
C
C
C
C
1
2
3
4
+
MAX9933
µMAX
PIN-PACKAGE
8 µMAX-8
8 µMAX-8
8 µMAX-8
8 µMAX-8
Features
8
7
6
5
V
OUT
N.C.
GND
CC
1

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MAX9933 Summary of contents

Page 1

... 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. The MAX9930–MAX9933 family is available in an 8-pin ® µMAX package. These devices consume 7mA with a 5V supply, and when powered down, the typical shut- down current is 13µ ...

Page 2

... Voltage Range V Output-Referred Noise Small-Signal Bandwidth Slew Rate SET INPUT (MAX9930/MAX9931/MAX9932) Voltage Range (Note 2) V Input Resistance Slew Rate (Note 3) DETECTOR OUTPUT (MAX9933) Voltage Range V Small-Signal Bandwidth Slew Rate 2 _______________________________________________________________________________________ OUT Short Circuit to GND ........................................ Continuous Continuous Power Dissipation (T + 0.3V) 8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW CC Operating Temperature Range ...........................-40° ...

Page 3

... MAX9931 T = +25°C A MAX9932 MAX9930/MAX9933 f = 2MHz MAX9931 RF MAX9932 MAX9930/MAX9933 f = 900MHz MAX9931 +25°C A MAX9932 MAX9930/MAX9933 f = 900MHz MAX9931 RF MAX9932 MAX9930/MAX9933 f = 1600MHz MAX9931 RF MAX9932 Connected Internally DC-coupled (Note +25°C and are guaranteed by design for T A MIN TYP MAX UNITS ...

Page 4

RF-Detecting Controllers and RF Detector = 3V, SHDN = +25°C, all log conformance plots are normalized to their respective temperatures otherwise noted.) MAX9930 SET vs. INPUT POWER ...

Page 5

RF-Detecting = 3V, SHDN = +25°C, all log conformance plots are normalized to their respective temperatures otherwise noted.) MAX9930 LOG INTERCEPT vs -57 -59 2MHz ...

Page 6

RF-Detecting Controllers and RF Detector = 3V, SHDN = +25°C, all log conformance plots are normalized to their respective temperatures otherwise noted.) MAX9931 LOG SLOPE vs. V ...

Page 7

... V (V) CC MAX9932 LOG CONFORMANCE vs. TEMPERATURE 0.1 INPUT POWER = -10dBm f = 50MHz RF 0 -0.1 -0.2 -0.3 -0.4 -0.5 -50 - 5.0 5.5 TEMPERATURE (°C) MAX9933 OUTPUT AND LOG CONFORMANCE vs. INPUT POWER AT 2MHz 1.8 1.6 1.4 1.2 1.0 0 +85° +25° -40° -60 -50 -40 -30 -20 INPUT POWER (dBm) CC 5.0 5.5 75 100 ...

Page 8

... INPUT POWER (dBm) MAX9933 LOG SLOPE vs 1.6GHz 28 27 50MHz 26 900MHz 25 2MHz 2.5 3.0 3.5 4.0 4.5 5.0 V (V) CC MAX9933 LOG CONFORMANCE vs. TEMPERATURE 0.4 INPUT POWER = -22dBm f = 50MHz RF 0.3 0.2 0.1 0 -0.1 -0.2 -50 - TEMPERATURE (°C) = +25°C, unless A MAX9933 OUTPUT AND LOG CONFORMANCE vs. INPUT POWER AT 1.6GHz 1 ...

Page 9

... CLPF OUT 500mV/div RFIN 250mV/div -42dBm 10μs/div _______________________________________________________________________________________ Controllers and RF Detector Typical Operating Characteristics (continued) SHDN 500mV/div 1V/div 4.0 4.5 5.0 5.5 MAIN OUTPUT NOISE-SPECTRAL DENSITY 10,000 MAX9933 CLPF = 220pF 0V 1000 0V 100 100 1k 10k 100k FREQUENCY (Hz) MAX9930 toc51 ≤ 900mV 75mV/div f = 50MHz RF 25mV/div -2dBm = +25° ...

Page 10

... DET DET DET DET 10dB 10dB 10dB 10dB OFFSET REFERENCE COMP CURRENT OUTPUT- ENABLED DELAY DET DET DET DET 10dB 10dB 10dB 10dB OFFSET REFERENCE COMP CURRENT Pin Description FUNCTION g X1 OUT m CLPF V-I* SET MAX9930 MAX9931 MAX9932 g X1 OUT m CLPF V-I* MAX9933 ...

Page 11

... Logarithmic slope and intercept determine the transfer 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 loga- rithmic slope. Therefore, a 10dB change in RF input results in a 250mV change at SET (OUT for the MAX9933) ...

Page 12

... GND for PA control inputs that source current. The Typical Operating Characteristics has the Maximum Out Voltage vs. V sourcing capabilities and output swing of OUT. The MAX9930–MAX9933 can be placed in shutdown by pulling SHDN to ground. Shutdown reduces supply cur- rent to typically 13µA. A graph of SHDN Response Time is included in the Typical Operating Characteristics . ...

Page 13

... 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 , domi- CLPF input impedance of approximately 50Ω. These devices require an additional external coupling capacitor in series with the RF input ...

Page 14

... 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 be placed as close as possible to the IC. ...

Page 15

... RF-Detecting For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 8 µMAX ______________________________________________________________________________________ Controllers and RF Detector Package Information PACKAGE CODE U8-1 α α DOCUMENT NO. 21-0140 15 ...

Page 16

... Added TOC46 to Typical Operating Characteristics Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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