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LT5525 Datasheet(PDF) 6 Page - Linear Technology |
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LT5525 Datasheet(HTML) 6 Page - Linear Technology |
6 / 12 page 6 LT5525 5525f PI FU CTIO S NC (Pins 1, 4, 8, 13, 16): Not Connected Internally. These pins should be grounded on the circuit board for improved LO-to-RF and LO-to-IF isolation. RF+, RF– (Pins 2, 3): Differential Inputs for the RF Signal. One RF input pin may be DC connected to a low impedance ground to realize a 50Ω single-ended input at the other RF pin. No external matching components are required. A DC voltage should not be applied across these pins, as they are internally connected through a transformer winding. EN (Pin 5): Enable Pin. When the input voltage is higher than 3V, the mixer circuits supplied through Pins 6, 7, 10 and 11 are enabled. When the input voltage is less than 0.3V, all circuits are disabled. Typical enable pin input current is 55µA for EN = 5V and 0.1µA when EN = 0V. VCC1 (Pin 6): Power Supply Pin for the LO Buffer Circuits. Typical current consumption is 11mA. This pin should be externally connected to the other VCC pins and decoupled with 1µF and 0.01µF capacitors. VCC2 (Pin 7): Power Supply Pin for the Bias Circuits. Typical current consumption is 2.5mA. This pin should be externally connected to the other VCC pins and decoupled with 1µF and 0.01µF capacitors. GND (Pins 9, 12): Ground. These pins are internally connected to the Exposed Pad for better isolation. They should be connected to ground on the circuit board, though they are not intended to replace the primary grounding through the Exposed Pad of the package. IF– and IF+ (Pins 10, 11): Differential Outputs for the IF Signal. An impedance transformation may be required to match the outputs. These pins must be connected to VCC through impedance matching inductors, RF chokes or a transformer center-tap. LO–, LO+ (Pins 14, 15): Differential Inputs for the Local Oscillator Signal. The LO input is internally matched to 50Ω. The LO can be driven with a single-ended source through either LO input pin, with the other LO input pin connected to ground. There is an internal DC resistance across these pins of approximately 480Ω. Thus, a DC blocking capacitor should be used if the signal source has a DC voltage present. Exposed Pad (Pin 17): Circuit Ground Return for the Entire IC. This must be soldered to the printed circuit board ground plane. BLOCK DIAGRA 15 14 6 11 2 3 7 5 10 HIGH SPEED LO BUFFER DOUBLE- BALANCED MIXER LINEAR AMPLIFIER LO– EXPOSED PAD LO+ VCC2 VCC1 EN IF+ 12 17 GND IF– 9 GND 5525 BD BIAS RF+ RF – |
Similar Part No. - LT5525_15 |
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Similar Description - LT5525_15 |
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