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LMH2121 Datasheet Preview

LMH2121 Datasheet

Fast-Responding Linear Power Detector

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LMH2121
www.ti.com
SNVS876A – AUGUST 2012 – REVISED MARCH 2013
LMH2121 3 GHz Fast-Responding Linear Power Detector with 40 dB Dynamic Range
Check for Samples: LMH2121
FEATURES
1
2 Linear Response
• 40 dB Power Detection Range
• Very Low Supply Current of 3.4 mA
• Short Response Time of 165 ns
• Stable Conversion Gain of 3.6 V/VRMS
• Multi-Band Operation from 100 MHz to 3 GHz
• Very Low Conformance Error
• High Temperature Stability of ±0.5 dB
• Shutdown Functionality
• Supply Range from 2.6V to 3.3V
• Package:
– 4-Bump DSBGA, 0.4mm Pitch
APPLICATIONS
• Multi Mode, Multi band RF power control
– GSM/EDGE
– CDMA
– W-CDMA
– LTE
– WAP
• Tablets
DESCRIPTION
The LMH2121 is an accurate fast-responding power
detector / RF envelope detector. Its response
between an RF input signal and DC output signal is
linear. The typical response time of 165 ns makes the
device suitable for an accurate power setting in
handsets during a rise time of RF transmission slots.
It can be used in all popular communications
standards: 2G/3G/4G/WAP.
The LMH2121 has an input range from 28 dBm to
+12 dBm. Over this input range the device has an
intrinsic high insensitivity for temperature, supply
voltage and loading. The bandwidth of the device is
from 100 MHz to 3 GHz, covering 2G/3G/4G/WiFi
wireless bands.
As a result of the unique internal architecture, the
device shows an extremely low part-to-part variation
of the detection curve. This is demonstrated by its low
intercept and slope variation as well as a very good
linear conformance. Consequently the required
characterization and calibration efforts are low.
The device is active for EN = High; otherwise it is in a
low power consumption shutdown mode. To save
power and allow for two detector outputs in parallel,
the output (OUT) is high impedance during shutdown.
The LMH2121 is offered in a tiny 4-bump DSBGA
package: 0.866 mm x 1.07 mm x 0.6 mm.
TYPICAL APPLICATION
RF
PA
COUPLER
R2
50:
ANTENNA
ENABLE
C
100 pF
R1
1 k:
RFIN/EN
VDD
LMH2121
OUT
GND
ADC
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012–2013, Texas Instruments Incorporated




etcTI

LMH2121 Datasheet Preview

LMH2121 Datasheet

Fast-Responding Linear Power Detector

No Preview Available !

LMH2121
SNVS876A – AUGUST 2012 – REVISED MARCH 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS (1)(2)
Supply Voltage
VDD - GND
RFIN/EN
VRF_PEAK+ VDC
ESD Tolerance (3)
Human Body Model
Machine Model
Charge Device Model
Storage Temperature Range
Junction Temperature (4)
For soldering specifications:
See http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=snoa549c
3.6V
3.6V
1500V
200V
1250V
65°C to 150°C
150°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) Human body model, applicable std. MIL-STD-883, Method 3015.7. Machine model, applicable std. JESD22–A115–A (ESD MM std of
JEDEC). Field-Induced Charge-Device Model, applicable std. JESD22–C101–C. (ESD FICDM std. of JEDEC)
(4) The maximum power dissipation is a function of TJ(MAX) , θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) - TA)/θJA. All numbers apply for packages soldered directly into a PC board.
OPERATING RATINGS (1)
Supply Voltage
2.6V to 3.3V
Temperature Range
40°C to +85°C
RF Frequency Range
100 MHz to 3 GHz
RF Input Power Range
Package Thermal Resistance θJA(2)
28 dBm to +12 dBm
130.9°C/W
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
(2) The maximum power dissipation is a function of TJ(MAX) , θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) - TA)/θJA. All numbers apply for packages soldered directly into a PC board.
2.7 V DC AND AC ELECTRICAL CHARACTERISTICS
Unless otherwise specified, all limits are ensured to TA = 25°C, VDD = 2.7V, RFIN= 1900 MHz CW (Continuous Wave,
unmodulated), EN = 2.7V. Boldface limits apply at the temperature extremes (1).
Symbol
Parameter
Condition
Min
Typ
Max
Units
(2)
(3)
(2)
Supply Interface
IDD
Supply Current
Active Mode. EN= High, no RF input
Signal
2.4
3.4
4.7
mA
Shutdown. EN= Low, no RF input
Signal
2
µA
(1) Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very
limited self-heating of the device such that TJ = TA. No specification of parametric performance is indicated in the electrical tables under
conditions of internal self-heating where TJ > TA.
(2) All limits are ensured by test or statistical analysis.
(3) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not specified on shipped
production material.
2
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Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: LMH2121


Part Number LMH2121
Description Fast-Responding Linear Power Detector
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LMH2121 Datasheet PDF






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