Triple/Dual-Mode

CDMA LNA/Mixers

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5

Pin Description

PIN

MAX2323

MAX2325

NAME

FUNCTION

1

1

RLNA

LNA Bias-Setting Pin. For nominal bias, connect a 24k

Ω resistor to ground. This

resistor value can be adjusted to alter the linearity of the input LNA in high-gain,

high-linearity CDMA modes.

—

2, 10, 23

N.C.

No Connection. Leave this pin floating.

2

—

PLNAIN

High-Band RF Input Port. Blocking capacitor is required, which may be used as part of

the matching network.

3, 8, 11,

12, 13, 18,

24, 25, 27

3, 8, 11, 12,

13, 17, 18,

24, 25, 27

GND

Ground

4

4

CLNAIN

Low-Band RF Input Port. Blocking capacitor is required, which may be used as part of

the matching network.

5

5

SLEEP

Logic Input. High shuts off entire device.

6

6

G2

Logic Input. See Tables 1 and 2 for details.

7

7

G1

Logic Input. See Tables 1 and 2 for details.

9

9

LOLIN

Low-Frequency LO Input Port. Requires blocking capacitor, which may be used as

part of an optional matching network.

10

—

LOHIN

High-Frequency LO Input Port. Requires blocking capacitor, which may be used as

part of an optional matching network.

14

14

MODE

Logic Input. See Tables 1 and 2 for details.

15

15

FMOUT

FM IF Output Port. Requires a pull-up inductor and a DC blocking capacitor, which

may be used as part of the matching network.

16

16

2.7V to 3.6V Supply Pin. Must be capacitively bypassed near the pin.

17

—

BAND

Logic Input. High selects high band (PCS). Low selects low band (cellular).

19, 20

19, 20

CDMA-,

CDMA+

Differential Output Port for CDMA Mode. Requires pull-up inductors and blocking

capacitors, which may be used as part of the matching network.

21

21

RBIAS

Bias Setting Pin. For nominal bias, connect a 20k

Ω resistor to ground. This resistor

value can be adjusted to alter the linearity of the mixers in all modes and the LNA in all

modes except high gain and high linearity.

22

22

CMIXIN

Low-Band Mixer Input Port. Requires blocking capacitor, which may be used as part of

the matching network.

23

—

PMIXIN

High-Band Mixer Input Port. Requires blocking capacitor, which may be used as part

of the matching network.

26

—

PLNAOUT

High-Band LNA Output Port. This port requires an external pull-up inductor and series

capacitor as part of the matching network.

—

26

2.7 to 3.6V Supply Pin. Bypassing is not necessary at this pin.