Rainbow-electronics MAX2684 Manual do Utilizador descarregar pdf (Página 11)

MAX2683/MAX2684

3.5GHz Downconverter Mixers

with Selectable LO Doubler

______________________________________________________________________________________ 11

Pin Description

IF PORT S11 vs. R

BIAS

1.2kΩ,

2kΩ, 820kΩ

MAX2684

NAME FUNCTION

Supply Voltage Input. Bypass with a 100pF capacitor as close to the pin as possible.

2, 3, 5, 9,

10, 12, 13,

15, EP

GND

Ground. Connect to ground plane with a low-inductance connection. Solder exposed paddle

evenly to the board ground plane.

4 RFIN

RF Input Port to Mixer. Requires a matching network and a DC-blocking capacitor that may be part

of this network.

ENX2

LO Frequency-Doubler Enable Input. Drive low to enable the LO doubler and run external LO at

half frequency. Drive high to disable the LO doubler and run external LO at full frequency.

16 BIAS

Bias-Setting Resistor Connection. A resistor, R

BIAS

, placed from BIAS to GND sets the linearity and

supply current of the mixer.

11, 14

IFOUT-,

IFOUT+

Differential, Open-Collector IF Output Ports of Mixer. Requires a matching network and pull-up

inductors to V

that can be part of this network.

8 LOX1

Full-Frequency Local-Oscillator Input to Downconverter Mixer. Requires a DC-blocking capacitor.

Leave unconnected if this pin is not used.

7 LOX2

Half-Frequency Local-Oscillator Input to LO Frequency Doubler, LO Filter, and Downconverter

Mixer. Requires a DC-blocking capacitor. Leave unconnected if this pin is not used.

RFIN S11 vs. R

BIAS

2kΩ,

1.2kΩ, 820kΩ

Typical Operating Characteristics (continued)

(MAX2683/MAX2684 EV kit, V

= +5V, R

BIAS

= 1.2kΩ, ENX2 = GND, f

= 3.6GHz, P

= -20dBm, f

LOX2

= 1650MHz for MAX2683 or

LOX2

= 1350MHz for MAX2684, P

= -5dBm, all input/output ports terminated in 50Ω, IFOUT+ and IFOUT- matched to single-ended

50Ω load, T

= +25°C, unless otherwise noted.)

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17

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