Datasheet AD8361 (Analog Devices) - 5

Data Sheet AD8361 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VRMS 1 6 VPOS VPOS 1 8 SREF AD8361 IREF AD8361 2 7 VRMS COMM 2 5 TOP VIEW RFIN RFIN 3 TOP VIEW 6 FLTR (Not to Scale) (Not to Scale) PWDN 4 5 COMM FLTR 3 4 PWDN
01088-C-004 01088-C-005 Figure 4. 8-Lead MSOP Figure 5. 6-Lead SOT-23
Table 3. Pin Function Descriptions Pin No. Pin No. MSOP SOT-23 Mnemonic Description
1 6 VPOS Supply Voltage Pin. Operational range 2.7 V to 5.5 V. 2 N/A IREF Output Reference Control Pin. Internal reference mode enabled when pin is left open; otherwise, this pin should be tied to VPOS. Do not ground this pin. 3 5 RFIN Signal Input Pin. Must be driven from an ac-coupled source. The low frequency real input impedance is 225 Ω. 4 4 PWDN Power-Down Pin. For the device to operate as a detector, it needs a logical low input (less than 100 mV). When a logic high (greater than VS − 0.5 V) is applied, the device is turned off and the supply current goes to nearly zero (ground and internal reference mode less than 1 µA, supply reference mode VS divided by 100 kΩ). 5 2 COMM Device Ground Pin. 6 3 FLTR By placing a capacitor between this pin and VPOS, the corner frequency of the modulation filter is lowered. The on-chip filter is formed with 27 pF||2 kΩ for small input signals. 7 1 VRMS Output Pin. Near rail-to-rail voltage output with limited current drive capabilities. Expected load >10 kΩ to ground. 8 N/A SREF Supply Reference Control Pin. To enable supply reference mode, this pin must be connected to VPOS; otherwise, it should be connected to COMM (ground). Rev. F | Page 5 of 22 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION Filtering Offset APPLICATION INFORMATION Basic Connections Output Swing Dynamic Range Input Coupling and Matching Input Coupling Using a Series Resistor Selecting the Filter Capacitor Operation at Low Frequencies Power Consumption, Enable and Power-On Volts to dBm Conversion Output Drive Capability and Buffering OUTPUT REFERENCE TEMPERATURE DRIFT COMPENSATION Extended Frequency Characterization EVALUATION BOARD CHARACTERIZATION SETUPS Equipment Analysis OUTLINE DIMENSIONS ORDERING GUIDE