PA

ANTENNA

RFIN

OUT

LMH2100

RF

VDD

GND

50 :

REF

ADC

2

1

6

3

4

5

-

+

COUPLER

EN

PA

ANTENNA

RFIN

OUT

LMH2100

RF

VDD

GND

50 :

EN

REF

ADC

2

1

6

3

4

5

-

+

COUPLER

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LMH2100

SNWS020C – NOVEMBER 2007 – REVISED OCTOBER 2015

LMH2100 50-MHz to 4-GHz 40-dB Logarithmic Power Detector for CDMA and WCDMA

1 Features

3 Description

The LMH2100 is a 40-dB RF power detector intended

1

•

Supply Voltage: 2.7 V to 3.3 V

for use in CDMA and WCDMA applications. The

•

Output Voltage: 0.3 V to 2 V

device has an RF frequency range from 50 MHz to

•

40-dB Linear in dB Power Detection Range

4 GHz. It provides an accurate temperature and

supply compensated output voltage that relates

•

Shutdown

linearly to the RF input power in dBm. The circuit

•

Multi-Band Operation from 50 MHz to 4 GHz

operates with a single supply from 2.7 V to 3.3 V.

•

0.5-dB Accurate Temperature Compensation

The LMH2100 has an RF power detection range from

•

External Configurable Output Filter Bandwidth

−45 dBm to −5 dBm, and is ideally suited for direct

•

0.4-mm Pitch DSBGA Package

use in combination with a 30-dB directional coupler.

Additional low-pass filtering of the output signal can

2 Applications

be realized by means of an external resistor and

capacitor. Typical Application: Output RC Low Pass

•

UMTS/CDMA/WCDMA RF Power Control

Filter shows a detector with an additional output low

•

GSM/GPRS RF Power Control

•

PA Modules

Typical Application: Feedback (R)C Low Pass Filter

•

IEEE 802.11b, g (WLAN)

shows a detector with an additional feedback low

The device is active for Enable = High; otherwise it is

in a low power-consumption shutdown mode. To save

power and prevent discharge of an external filter

capacitance, the output (OUT) is high-impedance

during shutdown.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (MAX)

LMH2100

DSBGA (6)

1.274 mm × 0.874 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application: Output RC Low Pass Filter

Typical Application: Feedback (R)C Low Pass

Filter

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.