LMH2121

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 wel...