1FEATURES

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/V RMS

• 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.