Datasheet LTC5582 (Analog Devices) - 9

LTC5582
PIN FUNCTIONS VCC (Pin 1):
Power Supply Pin. Typical current consump-
RT2 (Pin 7):
Optional Control Pin for 2nd-Order Output tion is 41.6mA at room temperature. This pin should be Temperature Compensation. Connect this pin to ground to externally bypassed with 1nF and 1µF chip capacitors. disable it. The output voltage will decrease with respect to
IN+, IN– (Pins 2, 4):
Differential Input Signal Pins. Either the room temperature (25°C) by connecting it to ground one can be driven with a single-ended signal while the via an off-chip resistor when the ambient temperature is other is AC-coupled to ground. These pins can also be either higher or lower. driven with a differential signal. The pins are internally
RT1 (Pin 8):
Optional Control Pin for 1st-Order Output biased to 1.585V and should be DC blocked externally. The Temperature Compensation. Connect this pin to ground differential impedance is typically 400Ω. The impedance to disable it. The output voltage will increase inversely of each pin to the DEC pin is 200Ω. proportional to ambient temperature.
DEC (Pin 3):
Input Common Mode Decoupling Pin. This
EN (Pin 9):
Enable Pin. An applied voltage above 1V will pin is internally biased to 1.585V and connected to an on- activate the bias for the IC. For an applied voltage below chip 50pF capacitor to ground. The impedance between 0.4V, the circuits will be shut down (disabled) with a reduc- DEC and IN+ (or IN–) is 200Ω. The pin can be connected tion in power supply current. If the enable function is not to the center tap of an external balun when terminated required, then this pin can be connected to VCC. Typical differentially. The pin can be floating or connected to enable pin input current is 100μA for EN = 3.3V. Note that ground via an AC-decoupling capacitor when driven either at no time should the Enable pin voltage be allowed to in single-ended or differential input configuration. exceed VCC by more than 0.3V.
GND (Pin 5, Exposed Pad Pin 11):
Circuit Ground Return
FLTR (Pin 10):
Connection for an External Filtering Capaci- for the Entire IC. This must be soldered to the printed tor C3. A minimum of 8nF capacitance is required for stable circuit board ground plane. AC average power measurement. This capacitor should
OUT (Pin 6):
DC Output Pin. The output impedance is be connected to VCC. mainly determined by an internal 100Ω series resistance which provides protection if the output is shorted to ground. Rev A For more information www.analog.com 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Test Circuits Applications Information Package Description Revision History Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Test Circuits Applications Information Package Description Revision History Typical Application Related Parts