STB7720L
STB7720L is 2.4-2.5 GHz Silicon Linear Power Amplifier IC manufactured by STMicroelectronics.
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2.4-2.5 GHz Silicon Linear Power Amplifier IC
PRELIMINARY DATA
Features
SUMMARY
- EXCELLENT LINEARITY EVM 2% @ 19d Bm (WITH 802.11g OFDM 54Mb/s MODULATION)
- VERY LOW QUIESCENT CURRENT (60m A)
- INTEGRATED LINEAR ANALOG CONTROL FOR DC CURRENT AND OUTPUT MANAGEMENT
- INTEGRATED AVERAGE CHANNEL POWER DETECTOR
- LEADLESS PACKAGE (3mmx3mm LEAD FREE) APPLICATIONS
- OPTIMIZED FOR USE IN 802.11 b/g
Figure 1. Package
QFN16L (3x3)
DESCRIPTION The STB7720L, manufactured in the third generation of ST proprietary pure Si bipolar process, is a three-stage linear power amplifier (PA) optimized for 802.11b/g wireless LAN (WLAN) applications in the 2.4GHz ISM band. It Features
32d B of power gain and delivers 19d Bm of linear output power with an EVM degradation of only 2% under 802.11g Modulation (54Mbps). The current consumption is as low as 125m A at 19d Bm make the STB7720L a good solution for mobile applications. It achieves less than -40d Bc firstside lobe suppression and less than -52d Bc secondside lobe suppression under 802.11b modulation (11Mbps). The device embeds a Linear Analog Control for DC current and output management and a Proprietary Average Channel Power Detector solution. This power detector has 20d B dynamic range with 1 voltage range and ±0.3d B accuracy under 2:1 load mismatch. It provides a buffered DC voltage proportional to the average channel output power. Thanks to this solution we save cost and space by removing a coupler, an op amp (usually required in a power down function) and also an integrator. The SBT7720 is housed in QFN 3mmx3mm Leadless package. Table 1. Order Codes
Order Codes STB7720 Marking 7720 Package QFN16L (3x3) Packaging Tape & Reel
Table 2....
