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LT5527 Datasheet(PDF) 7 Page - Linear Technology |
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LT5527 Datasheet(HTML) 7 Page - Linear Technology |
7 / 16 page LT5527 7 5527fa PIN FUNCTIONS NC (Pins 1, 2, 4, 8, 13, 14, 16): Not Connected Internally. These pins should be grounded on the circuit board for improved LO-to-RF and LO-to-IF isolation. RF (Pin 3): Single-Ended Input for the RF Signal. This pin is internally connected to the primary side of the RF input transformer, which has low DC resistance to ground. If the RF source is not DC blocked, then a series blocking capacitor must be used. The RF input is internally matched from 1.7GHz to 3GHz. Operation down to 400MHz or up to 3700MHz is possible with simple external matching. EN (Pin 5): Enable Pin. When the input enable 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 input current is 50μA for EN = 5V and 0μA when EN = 0V. The EN pin should not be left floating. Under no conditions should the EN pin voltage exceed VCC + 0.3V, even at start-up. VCC2 (Pin 6): Power Supply Pin for the Bias Circuits. Typical current consumption is 2.8mA. This pin should be externally connected to the VCC1 pin and decoupled with 1000pF and 1μF capacitors. VCC1 (Pin 7): Power Supply Pin for the LO Buffer Circuits. Typical current consumption is 23.2mA. This pin should be externally connected to the VCC2 pin and decoupled with 1000pF and 1μF capacitors. GND (Pins 9, 12): Ground. These pins are internally connected to the backside ground for improved isola- tion. They should be connected to the RF ground on the circuit board, although they are not intended to replace the primary grounding through the backside contact of the package. IF–, 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 (Pin 15): Single-Ended Input for the Local Oscillator Signal. This pin is internally connected to the primary side of the LO transformer, which is internally DC blocked. An external blocking capacitor is not required. The LO input is internally matched from 1.2GHz to 5GHz. Operation down to 380MHz is possible with simple external matching. Exposed Pad (Pin 17): Circuit Ground Return for the Entire IC. This must be soldered to the printed circuit board ground plane. BLOCK DIAGRAM 15 7 11 3 6 5 10 DOUBLE-BALANCED MIXER LINEAR AMPLIFIER LIMITING AMPLIFIERS LO VCC2 VCC1 EN IF+ 12 GND 17 EXPOSED PAD IF– 9 GND 5527 BD BIAS RF VCC1 REGULATOR |
Similar Part No. - LT5527_15 |
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Similar Description - LT5527_15 |
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