LT5515

6

5515fa

GND (Pins 1, 4): Ground Pin.

pins are internally biased to 1.54V. They must be driven

with a differential signal. An external matching network is

required for impedance transformation.

should be decoupled using 1000pF and 0.1

µF capacitors.

and Q-Mixer. An external resistor must be connected

between this pin and ground to set the DC bias current of

the I/Q demodulator.

EN (Pin 7): Enable Pin. When the input voltage is higher

than 1.6V, the circuit is completely turned on. When the

input voltage is less than 1.3V, the circuit is turned off.

PI FU CTIO S

Pins. These pins are internally biased to 2.44V. They can

be driven single-ended by connecting one to an AC ground

through a 1000pF capacitor. However, differential input

drive is recommended to minimize LO feedthrough to the

RF input pins.

–0.85V for each pin.

–0.85V for each pin.

GROUND (Pin 17, Backside Contact): Ground Return for

the Entire IC. This pin must be soldered to the printed

circuit board ground plane.

BLOCK DIAGRA

+

0

°/90°

BIAS

16

–

15

+

14

–

13

LO BUFFERS

LPF

I-MIXER

LPF

Q-MIXER

2

5

7

EN

1

GND GND

8

9

4

12

5515 BD

3

17

10

11

RF AMP