http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




National Semiconductor Electronic Components Datasheet

LMH2100 Datasheet

50 MHz to 4 GHz 40 dB Logarithmic Power Detector

No Preview Available !

LMH2100 pdf
www.DataSheet4U.com
November 28, 2007
LMH2100
50 MHz to 4 GHz 40 dB Logarithmic Power Detector for
CDMA and WCDMA
General Description
The LMH2100 is a 40 dB RF power detector intended for use
in CDMA and WCDMA applications. The device has an RF
frequency range from 50 MHz to 4 GHz. It provides an accu-
rate temperature and supply compensated output voltage that
relates linearly to the RF input power in dBm. The circuit op-
erates with a single supply from 2.7V to 3.3V.
The LMH2100 has an RF power detection range from −45
dBm to −5 dBm and is ideally suited for direct use in combi-
nation with a 30 dB directional coupler. Additional low-pass
filtering of the output signal can be realized by means of an
external resistor and capacitor. Figure (a) shows a detector
with an additional output low pass filter. The filter frequency
is set with RS and CS.
Figure (b) shows a detector with an additional feedback low
pass filter. Resistor RP is optional and will lower the Trans
impedance gain (RTRANS). The filter frequency is set with
CP//CTRANS and RP//RTRANS.
The device is active for Enable = High, otherwise it is in a low
power consumption shutdown mode. To save power and pre-
vent discharge of an external filter capacitance, the output
(OUT) is high-impedance during shutdown.
The LMH2100 power detector is offered in the small 0.4 mm
pitch micro SMD package.
Features
40 dB linear in dB power detection range
Output voltage range 0.3 to 2V
Shutdown
Multi-band operation from 50 MHz to 4 GHz
0.5 dB accurate temperature compensation
External configurable output filter bandwidth
0.4 mm-pitch micro SMD package
Applications
UMTS/CDMA/WCDMA RF power control
GSM/GPRS RF power control
PA modules
IEEE 802.11b, g (WLAN)
Typical Application
30014071
(a) LMH2100 with Output RC Low Pass Filter
30014004
(b) LMH2100 with Feedback (R)C Low Pass Filter
© 2007 National Semiconductor Corporation 300140
www.national.com


National Semiconductor Electronic Components Datasheet

LMH2100 Datasheet

50 MHz to 4 GHz 40 dB Logarithmic Power Detector

No Preview Available !

LMH2100 pdf
www.DataShAeebt4Us.ocolmute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
VDD - GND
RF Input
Input power
DC Voltage
Enable Input Voltage
ESD Tolerance (Note 2)
Human Body Model
Machine Model
Charge Device Model
Storage Temperature
Range
3.6V
10 dBm
400 mV
VSS - 0.4V < V EN < VDD + 0.4V
2000V
200V
2000V
−65°C to 150°C
Junction Temperature
(Note 3)
Maximum Lead Temperature
(Soldering,10 sec)
150°C
260°C
Operating Ratings (Note 1)
Supply Voltage
Temperature Range
RF Frequency Range
RF Input Power Range (Note 5)
Package Thermal Resistance θJA
(Note 3)
2.7V to 3.3V
−40°C to +85°C
50 MHz to 4 GHz
−45 dBm to −5 dBm
−58 dBV to −18 dBV
126.3°C/W
2.7 V DC and AC Electrical Characteristics
Unless otherwise specified, all limits are guaranteed at TA = 25°C, VDD = 2.7V, RF input frequency f = 1855 MHz CW (Continuous
Wave, unmodulated). Boldface limits apply at the temperature extremes (Note 4).
Symbol
Parameter
Condition
Min Typ Max
(Note 6) (Note 7) (Note 6)
Units
Supply Interface
IDD Supply Current
Logic Enable Interface
Active mode: EN = High, no signal
present at RFIN.
6.3 7.1 7.9
5.0 9.2 mA
Shutdown: EN = Low, no signal present
0.5 0.9
at RFIN.
1.9 μA
EN = Low: PIN = 0 dBm (Note 8)
10
VLOW
EN Logic Low Input Level
(Shutdown Mode)
0.6 V
VHIGH
EN Logic High Input Level
IEN Current into EN Pin
RF Input Interface
1.1 V
50 nA
RIN Input Resistance
Output Interface
46.7 51.5 56.4
VOUT
IOUT
Output Voltage Swing
Output Short Circuit Current
From Positive Rail, Sourcing,
VREF = 0V, IOUT = 1 mA
From Negative Rail, Sinking,
VREF = 2.7V, IOUT = 1 mA
Sourcing, VREF = 0V, VOUT = 2.6V
Sinking, VREF = 2.7V, VOUT = 0.1V
15.3 23.9
28.9
13.1 22.3
28.3
mV
5.8 7.3
5.2
6.2 8.3
5.4
mA
BW
RTRANS
Small Signal Bandwidth
Output Amp Transimpedance
Gain
No RF input signal. Measured from REF
input current to VOUT
No RF input signal, from IREF to VOUT,
DC
40.7
416
43.3
46.7
kHz
k
SR Slew Rate
Positive, VREF from 2.7V to 0V
Negative, VREF from 0V to 2.7V
3.4 3.9
3.3
3.8 4.4
3.7
V/µs
ROUT
Output Impedance
(Note 8)
No RF input signal, EN = High. DC
measurement
0.2 1.8
4.0
www.national.com
2


Part Number LMH2100
Description 50 MHz to 4 GHz 40 dB Logarithmic Power Detector
Maker National Semiconductor
Total Page 30 Pages
PDF Download
LMH2100 pdf
Download PDF File
LMH2100 pdf
View for Mobile






Related Datasheet

1 LMH2100 LMH2100 50-MHz to 4-GHz 40-dB Logarithmic Power Detector for CDMA and WCDMA (Rev. C) Texas Instruments
Texas Instruments
LMH2100 pdf
2 LMH2100 50 MHz to 4 GHz 40 dB Logarithmic Power Detector National Semiconductor
National Semiconductor
LMH2100 pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components