|
|
PDF MAX9930 Data sheet ( Hoja de datos )
| Número de pieza | MAX9930 | |
| Descripción | (MAX9930 - MAX9933) 2MHz to 1.6GHz 45dB RF-Detecting Controllers and RF Detector | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX9930 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
19-0859; Rev 0; 8/07
EVAALVUAAILTAIOBNLEKIT
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
General Description
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
www.DataSheeft4ibUe.crovmideo 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® package. These devices consume 7mA with a
5V supply, and when powered down, the typical shut-
down current is 13µA.
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
Cellular Handsets (TDMA, CDMA, GPRS, GSM)
Features
o Complete RF-Detecting PA Controllers
(MAX9930/MAX9931/MAX9932)
o Complete RF Detector (MAX9933)
o 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)
o 2MHz to 1.6GHz Frequency Range
o Temperature Stable Linear-in-dB Response
o Fast Response: 70ns 10dB Step
o 10mA Output Sourcing Capability
o Low Power: 17mW at 3V (typ)
o 13µA (typ) Shutdown Current
o Available in a Small 8-Pin µMAX Package
Ordering Information
PART
TEMP RANGE
MAX9930EUA+T
MAX9931EUA+T
MAX9932EUA+T
MAX9933EUA+T
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
+Denotes a lead-free package.
T = Tape and reel.
PIN-
PACKAGE
8 µMAX-8
8 µMAX-8
8 µMAX-8
8 µMAX-8
PKG
CODE
U8-1
U8-1
U8-1
U8-1
Pin Configurations
TOP VIEW
Block Diagram located at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
RFIN 1 +
SHDN 2
SET 3
CLPF 4
MAX9930
MAX9931
MAX9932
8 VCC
7 OUT
6 N.C.
5 GND
RFIN 1 +
SHDN 2
GND 3
MAX9933
CLPF 4
8 VCC
7 OUT
6 N.C.
5 GND
µMAX
µMAX
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
Typical Operating Characteristics (continued)
(VCC = 3V, SHDN = VCC, TA = +25°C, all log conformance plots are normalized to their respective temperatures, TA = +25°C, unless
otherwise noted.)
MAX9930
LOG INTERCEPT vs. VCC
-57
-59
www.DataSheet-461U.com
-63
2MHz
50MHz
-65 900MHz
-67 1.6GHz
MAX9930
LOG CONFORMANCE vs. TEMPERATURE
0
INPUT POWER = -22dBm
fRF = 50MHz
-0.1
-0.2
-0.3
-0.4
MAX9931
SET vs. INPUT POWER
1.8
1.6
1.4 1.6GHz
1.2
1.0
900MHz
0.8
0.6
2MHz
50MHz
-69 -0.5
0.4
-71
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VCC (V)
MAX9931
LOG CONFORMANCE vs. INPUT POWER
4
-0.6
-50
1.8
-25 0 25 50 75 100
TEMPERATURE (°C)
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 2MHz
MAX9930 toc14
4
0.2
-50
1.8
-40 -30 -20 -10 0
INPUT POWER (dBm)
10 20
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 50MHz
MAX9930 toc15
4
3 2MHz
1.6
3 1.6
3
2 900MHz
1.4
2 1.4
2
1 50MHz
1.2
1 1.2
1
0
-1 1.6GHz
-2
-3
-4
-50 -40 -30 -20 -10 0
INPUT POWER (dBm)
10 20
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 900MHz
1.8 4MAX9930 toc16
1.0 0
0.8
TA = -40°C
0.6
TA = +25°C
0.4
TA = +85°C
0.2
-50 -40 -30 -20 -10 0
INPUT POWER (dBm)
-1
-2
-3
-4
10 20
MAX9931
SET AND LOG CONFORMANCE
vs. INPUT POWER AT 1.6GHz
1.8 4MAX9930 toc17
1.0
0.8
TA = -40°C
0.6
TA = +25°C
0.4
TA = +85°C
0.2
-50 -40 -30 -20 -10 0
INPUT POWER (dBm)
0
-1
-2
-3
-4
10 20
MAX9931
LOG SLOPE vs. FREQUENCY
29
1.6
3 1.6
3
28
TA = +85°C
1.4 2 1.4 2
1.2
1 1.2
27
1
TA = +25°C
1.0 0 1.0 0 26
0.8
TA = -40°C
0.6 TA = +25°C
0.4 TA = +85°C
0.2
-50 -40 -30 -20 -10 0
INPUT POWER (dBm)
-1
-2
-3
-4
10 20
0.8
TA = -40°C
0.6
TA = +25°C
0.4
TA = +85°C
0.2
-50 -40 -30 -20 -10 0
INPUT POWER (dBm)
-1
-2
-3
-4
10 20
25
TA = -40°C
24
23
0
300 600 900 1200 1500 1800
FREQUENCY (MHz)
_______________________________________________________________________________________ 5
5 Page 
2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
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 gm stage, which is
buffered and then applied to OUT. For the
MAX9930/MAX9931/MAX9932, OUT is applied to the
www.DataSheetg4aUi.nco-cmontrol input of the PA to close the control loop.
The voltage applied to SET determines 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 base-
band IC which, in turn, controls the PA biasing with the
output (Figure 2).
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.
XX
50Ω CC
50Ω
CCLPF
PA TRANSMITTER
RFIN VCC
MAX9933
SHDN
GND
OUT
N.C.
CLPF GND
DAC
VCC
BASEBAND
IC
0.01µF
ADC
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.
Transfer Function
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). The Log Conformance vs. Input Power plots
(see Typical Operating Characteristics) show the dynam-
ic range of the log amp family. Dynamic range is the
range for which the error remains within a band of ±1dB.
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:
RFIN = (SET / SLOPE) + IP
(MAX9930/MAX9931/MAX9932)
RFIN = (OUT / SLOPE) + IP
(MAX9933)
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
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX9930.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX993 | Micropower / Low-Voltage / SOT23 / Rail-to-Rail I/O Comparators |  Maxim Integrated |
| MAX9930 | (MAX9930 - MAX9933) 2MHz to 1.6GHz 45dB RF-Detecting Controllers and RF Detector | Maxim Integrated Products |
| MAX9931 | (MAX9930 - MAX9933) 2MHz to 1.6GHz 45dB RF-Detecting Controllers and RF Detector | Maxim Integrated Products |
| MAX9932 | (MAX9930 - MAX9933) 2MHz to 1.6GHz 45dB RF-Detecting Controllers and RF Detector | Maxim Integrated Products |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |