Data SheetADN289112009008001000700 µ A)800600500600400400300 µ A REFERRED OFFSET (nA)RSSI OUTPUT CURRENT (52002001000 05244-018 0 05244-025 020040060080010001200–40–20020406080100PD_CATHODE CURRENT (PHOTODIODE CURRENT) ( µ A)TEMPERATURE ( ° C) Figure 14. RSSI Output vs. Average Photodiode Current Figure 17. RSSI Offset is the Difference Between Measured RSSI Output and PD_CATHODE (Input) Current of 5 µA 605.04.5504.0 µ A)3.5403.0302.52.0+100 ° C+30 ° C20RSSI LINEARITY (%)1.5RSSI OUTPUT CURRENT (1.0100.5–40 ° C0 05244-028 0 05244-029 010203040506002004006008001000PD_CATHODE CURRENT (PHOTODIODE CURRENT) ( µ A)PD_CATHODE CURRENT ( µ A) Figure 15. RSSI Output vs. Average Photodiode Current (Zoomed) Figure 18. RSSI Linearity % vs. PD_CATHODE Current –0.1544.5–0.2044.0–0.25–0.3043.5–0.3543.0–0.40(mA)–0.45I CC 42.5–0.50–0.5542.0–0.6041.5–0.65COMPLIANCE VOLTAGE REFERRED TO VCC (V) –0.70 05244-023 41.0 05244-024 01002003004005006007008009001000–60–40–20020406080100120INPUT CURRENT ( µ A)TEMPERATURE ( ° C) Figure 16. PD_CATHODE Compliance Voltage vs. Figure 19. ADN2891 ICC Current vs. Temperature Input Current RSSI (Refer to VCC) Rev. B | Page 9 of 16 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION LIMITING AMPLIFIER Input Buffer CML Output Buffer LOSS OF SIGNAL (LOS) DETECTOR RECEIVED SIGNAL STRENGTH INDICATOR (RSSI) SQUELCH MODE APPLICATIONS PCB DESIGN GUIDELINES Output Buffer Power Supply and Ground Planes PCB Layout Soldering Guidelines for the LFCSP OUTLINE DIMENSIONS ORDERING GUIDE