MAX2338 Просмотр технического описания (PDF) - Maxim Integrated

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MAX2338

Triple/Dual-Mode CDMA LNA/Mixers

Maxim Integrated 

Triple/Dual-Mode CDMA LNA/Mixers

Pin Description

PIN

1

2

3, 8, 11, 18,

24, 25, 27,

Exposed

Paddle

4

5

6

7

9

10

12

13

14

15

16

17

19, 20

21

22

23

26

28

NAME

RLNA

PLNAIN

GND

CLNAIN

BAND

LIN

GAIN

LO/2

LOIN

PLOOUT

CLOOUT

NC

FMOUT

VCC

BUFFEN

IF-, IF+

RBIAS

CMIXIN

PMIXIN

PLNAOUT

CLNAOUT

FUNCTION

LNA Bias–Setting Resistor Connection. For nominal bias, connect a 24kΩ resistor to ground. The

value of this resistor sets the bias current for HGHL LNAs.

High-Band RF Input. Requires a blocking capacitor which may be used as part of the input

matching network.

Ground Reference for RF, DC and Logic Inputs. Solder the exposed paddle evenly to the circuit

board ground plane.

Low-Band RF Input. Requires a blocking capacitor which may be used as part of the input

matching network.

Band-Select Logic Input. LOW selects high-band (PCS), HIGH selects low-band (cellular).

Linearity-Select Logic Input. See Detailed Description for control modes.

Gain-Select Logic Input. See Detailed Description for control modes.

LO Divider-Select Input. LOW disables LO divider, HIGH selects divider in cellular and FM

modes. See Detailed Description for control modes.

LO Input Port. Requires an external DC blocking capacitor.

PCS LO Buffer Output Port. Internally matched to 100Ω (nominal). Does not require a blocking

capacitor.

Cell LO Buffer Output Port. Internally matched to 100Ω (nominal). Does not require a blocking

capacitor. The output frequency is one half LOIN when LO/2 is floating or HIGH, and equal to

LOIN when LO/2 is LOW.

No Connection

FM Mixer Output Port. Requires pullup inductor and DC blocking capacitor, which may be used

as part of the output matching network.

Power Supply Pin. Bypass with capacitor as close to the pin as possible.

LO Output Buffer Enable. Drive BUFFEN HIGH to power up the LO output buffer associated with

the selected band.

Mixer Differential Outputs. Require pullup inductors and series capacitors which can be used as

part of the output matching network.

Bias Setting Resistor Connection. For nominal bias, connect a 24kΩ resistor to ground. The value

of this resistor sets current for all blocks except HGHL LNA.

Low-Band Mixer Input. Requires a blocking capacitor which may be used as part of the input

matching network.

High-Band Mixer Input. Requires a blocking capacitor which may be used as part of the input

matching network.

High-Band LNA Output Port. Connect a pullup inductor to VCC and an external series blocking

capacitor which may be used as a part of the output matching network.

Low-Band LNA Output Port. Connect a pullup inductor to VCC and an external series blocking

capacitor which may be used as a part of the output matching network.

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