MAX9995(2011) Просмотр технического описания (PDF) - Maxim Integrated

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MAX9995
(Rev.:2011)

Dual, SiGe, High-Linearity, 1700MHz to 2700MHz Downconversion Mixer with LO Buffer/Switch

Maxim Integrated 

Dual, SiGe, High-Linearity, 1700MHz to 2700MHz

Downconversion Mixer with LO Buffer/Switch

Pin Description

PIN

1

2

3, 5, 7, 12, 20, 22,

24, 25, 26, 34

NAME

RFMAIN

TAPMAIN

FUNCTION

Main Channel RF Input. Internally matched to 50Ω. Requires an input DC-blocking capacitor.

Main Channel Balun Center Tap. Connect a 0.033µF capacitor from this pin to the board ground.

GND Ground

4, 6, 10, 16, 21, 30,

36

8

9

11

VCC

TAPDIV

RFDIV

IFD_SET

Power Supply. Connect bypass capacitors as close as possible to the pin (see the Typical

Application Circuit).

Diversity Channel Balun Center Tap. Connect a 0.033µF capacitor from this pin to the ground.

Diversity Channel RF Input. Internally matched to 50Ω. Requires an input DC-blocking capacitor.

IF Diversity Amplifier Bias Control. Connect a 1.2kΩ resistor from this pin to ground to set the

bias current for the diversity IF amplifier.

13, 14

15

17

18, 28

19

23

27

IFD+, IFD-

Diversity Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC

(see the Typical Application Circuit).

IND_EXTD Connect a 10nH inductor from this pin to ground to increase the RF-IF and LO-IF isolation.

LO_ADJ_D

LO Diversity Amplifier Bias Control. Connect a 392Ω resistor from this pin to ground to set the

bias current for the diversity LO amplifier.

N.C. No Connection. Not internally connected.

LO1

Local Oscillator 1 Input. This input is internally matched to 50Ω. Requires an input DC-blocking

capacitor.

LOSEL Local Oscillator Select. Set this pin to high to select LO1. Set to low to select LO2.

LO2

Local Oscillator 2 Input. This input is internally matched to 50Ω. Requires an input DC-blocking

capacitor.

29

31

32, 33

35

LO_ADJ_M LO Main Amplifier Bias Control. Connect a 392Ω resistor from this pin to ground to set the bias

current for the main LO amplifier.

IND_EXTM Connect a 10nH inductor from this pin to ground to increase the RF-IF and LO-IF isolation.

IFM-, IFM+ Main Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC

(see the Typical Application Circuit).

IFM_SET IF Main Amplifier Bias Control. Connect a 1.2kΩ resistor from this pin to ground to set the bias

current for the main IF amplifier.

Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses

—

EP

multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These

multiple via grounds are also required to achieve the noted RF performance.

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