Rainbow Electronics MAX2325 User Manual

________________General Description

The MAX2323/MAX2325 are low-noise amplifier (LNA)
plus mixer ICs optimized for code-division multiple-access
(CDMA) applications in both cellular and PCS bands. The
MAX2323 addresses dual-band, triple-mode CDMA appli­cations by providing switched signal paths for cellular FM,
cellular CDMA, and PCS CDMA. The MAX2325 is a cellu­lar-band dual-mode version.

To optimize cellular-band dynamic range at minimum cur­rent, the MAX2323/MAX2325 implement four LNA states:
high gain/high linearity, high gain/low linearity, midgain,
and low gain. In high-gain/high-linearity mode, the
adjustable high-intercept LNA minimizes desensitization in
the presence of a large interfering signal. For the other
gain states, the LNA current is reduced to improve stand­by time.

The CDMA mixers are designed for high linearity, low
noise, and differential IF outputs, while the FM mixer is
designed for lower current and single-ended output. Each
band is implemented with a separate mixer to optimize
performance for the specific band.

The MAX2323/MAX2325 can also be used in TDMA,
EDGE, and W-CDMA phones.

________________________Applications

Dual-Band, Triple-Mode PCS/Cellular Phones

Dual-Mode Cellular Phones

____________________________Features

♦ 2.7V Operation

♦ Dual Band, Triple Mode

♦ Three LNA Gain Settings (Cellular)

♦ Two LNA Gain Settings (PCS)

♦ 18mA in Low-Gain Mode

19.5mA in Paging and Midgain Mode

26.5mA in High-Gain, High-Linearity Mode

16.5mA in FM Mode, High-Gain, Low-Linearity
Mode

♦ 2.5dB (typ) Cascade Noise Figure

♦ Adjustable LNA IIP3, +5dBm to +13dBm

♦ Ultra-Small 28-Pin Package (5mm x 5mm)

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

________________________________________________________________ Maxim Integrated Products 1

19-1736; Rev 0; 7/00

For free samples and the latest literature, visit www.maxim-ic.com or phone [phone].
For small orders, phone [phone].

Pin Configuration/

Functional Diagram

Typical Application Circuits appear at end of data sheet.

T

Ordering Information

PART TEMP. RANGE PIN- PACKAGE

MAX2323EGI -40°C to +85°C 28 QFN
MAX2325EGI -40°C to +85°C
MAX2323EVKIT -40°C to +85°C

28 QFN

28 QFN

TOP VIEW

RLNA

PLNAIN

GND

CLNAIN

SLEEP

G2

G1

CLNAOU

GND

PLNAOUTGND

27

28 22

1

2

3

4

5

6

7

8

9

GND

LOLIN

2526

MAX2323

10 11 12 13 14

GND

LOHIN

QFN

GND

GND

2324

PMIXIN

GND

CMIXIN

MODE.

21

20

19

18

17

16

15

RBIAS

CDMA+

CDMA-

GND

BAND

V

CC

FMOUT

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +3.6V, R

RBIAS

= 20kΩ, R

RLNA

= 24kΩ, TA= -40°C to +85°C, no RF applied. Typical values are VCC= 2.75V and

T

A

= +25°C, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VCCto GND ...............................................................0.3V, +4.3V

Digital Input Voltage to GND......................-0.3V to (V

CC

+ 0.3V)

LNA Input Level .....................................................................1Vp

LO, Mixer Input Levels .....................................................+5dBm

Digital Input Current .........................................................±10mA

Continuous Power Dissipation (T

A

= +70°C)
28-Pin QFN (derate 28.5mW/°C
above T

A

= +70°C) ...................................................2000mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................ +300°C

PCS CDMA MODE (MAX2323)

PARAMETER CONDITIONS MIN TYP MAX UNITS

CELLULAR CDMA MODE (MAX2323/MAX2325)

Operating Supply Current

FM MODE (MAX2323/MAX2325)

Operating Supply Current

SHUTDOWN MODE

Shutdown Supply Current SLEEP = high 1 25 µA

ALL MODES

Digital Input Logic High Except SLEEP input 2.0 V

SLEEP Input Logic High

Digital Input Logic Low 0.6 V
Digital Input Current High 5 µA
Digital Input Current Low -25 µA

Midgain mode 20.5 24

High-gain, low-linearity idle mode 22 25.5Operating Supply Current

High-gain, high-linearity mode 25.5 30

Low-gain mode 18.0 21.5

Midgain mode 19.5 23.5

High-gain, low-linearity idle mode 19.5 23.5

High-gain, high-linearity mode 26.5 31.5

Low-gain mode 15 18

Midgain mode 16.5 20

High-gain, low-linearity mode 16.5 20

High-gain, high-linearity mode 23.5 28

V

-

CC

0.6

mA

mA

mA

V

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(MAX2323 EV kit, F

PLNAIN

= 1960MHz, F

CLNAIN

= 881MHz, FIF= 110MHz, high-side LO, 50Ω system, R

RBIAS

= 20kΩ,

R

RLNA

= 24kΩ. Typical values are VCC= 2.75V, TA= +25°C. LO input power = -7dBm, LOW = 0V, HIGH = VCC, unless otherwise

noted.) (Note 1)

OVERALL PERFORMANCE

Low-Band RF Frequency Range (Note 2) 850 950 MHz

High-Band RF Frequency
Range

Low-Band LO Frequency Range (Note 2)

High-Band LO Frequency
Range

IF Frequency Range (Note 2) 40 400 MHz
LO Input Level 100Ω input impedance -7 -5 0 dBm

CELLULAR LNA PERFORMANCE (MAX2323/MAX2325)

CDMA AND FM HIGH-GAIN, HIGH-LINEARITY MODES

Gain TA = T

Noise Figure 1.7 1.9 dB

IIP3

CDMA HIGH-GAIN, LOW-LINEARITY PAGING MODE, AND FM HIGH-GAIN MODE

Gain TA = T

LNA Noise Figure 1.7 1.9 dB

LNA IIP3 (Note 3)

CDMA AND FM MIDGAIN MODES

Gain TA = T

Noise Figure 3.3 3.5 dB

IIP3 (Note 3)

CDMA AND FM LOW-GAIN MODES

Gain TA = T

Noise Figure 7.5 8.5 dB

IIP3 (Note 3) 13 17.5 dBm

PCS LNA PERFORMANCE (MAX2323)

CDMA HIGH-GAIN, HIGH-LINEARITY MODE

Gain TA = T

Noise Figure 1.9 2.1 dB

IIP3 (Note 3)

PARAMETER CONDITIONS MIN TYP MAX UNITS

MAX2323 (Note 2) 1800 2200 MHz

MAX2323 (Note 2) 1600 2300 MHz

MIN

MIN

MIN

MIN

MIN

800 1150 MHz

to T

to T

to T

to T

to T

MAX

MAX

MAX

MAX

MAX

TA = +25°C 9 10.5

= T

= T

= T

= T

MIN

MIN

MIN

MIN

to T

to T

to T

to T

MAX

MAX

MAX

MAX

T

A

TA = +25°C 2.5 5
T

A

TA = +25°C 8.5 10

T

A

TA = +25°C78

T

A

14.5 15.5 17 dB

7.5

13 14.5 16 dB

2.7

4.5 6 8 dB

5

-4.5 -3.5 -1.5 dB

13.5 14.5 15.5 dB

5.5

dBm

dBm

dBm

dBm

Note 1: Devices are production tested for functionality at frequencies stated; 30 units from 3 independent wafer lots, when one lot

was at the upper process extreme, one lot was nominal, and one lot was at the lower process extreme, were characterized.
The resulting standard deviation therefore includes process variations. Data sheet limits are ±3σ from the mean.

Note 2: Operation over this frequency range requires the ports to be rematched for the desired operating range. Performance at

various frequencies is indicated by the S-parameter data in Tables 3–7.

Note 3: Specifications are based on R

BIAS

= 20kΩ. ICCfor all LNAs (except HGHL) and mixers are inversely proportional to R

RBIAS

.

IIP3 can be traded for I

CC

by selecting other values of R

RBIAS

.

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2323 EV kit, F

PLNAIN

= 1960MHz, F

CLNAIN

= 881MHz, FIF= 110MHz, high-side LO, 50Ω system, R

RBIAS

= 20kΩ,

R

RLNA

= 24kΩ. Typical values are VCC= 2.75V, TA= +25°C. LO input power = -7dBm, LOW = 0V, HIGH = VCC, unless otherwise

noted.) (Note 1)

CDMA HIGH-GAIN, LOW-LINEARITY PAGING MODE

Gain TA = T

LNA Noise Figure 1.9 2.1 dB

LNA IIP3 (Note 3)

CDMA MIDGAIN MODE

Gain TA = T

Noise Figure 5.6 6.0 dB

IIP3 (Note 3)

CELLULAR MIXER PERFORMANCE (MAX2323/MAX2325)

CDMA, ALL MODES

Gain TA = T

Noise Figure 7.5 8.5 dB

IIP3 TA = T

FM MODE

Gain TA = T

Noise Figure 10.5 11.5 dB

IIP3 TA = T

PCS MIXER PERFORMANCE (MAX2323)

CDMA HIGH-GAIN, HIGH-LINEARITY MODE

Gain TA = T

Noise Figure 7.9 8.5 dB

IIP3 TA = T

PARAMETER CONDITIONS MIN TYP MAX UNITS

to T

MIN

to T

MIN

to T

MIN

to T

MIN

to T

MIN

to T

MIN

to T

MIN

to T

MIN

MAX

TA = +25°C

T

= T

MIN

to T

MAX

A

MAX

MAX

(Note 3) 3.5 4.8 dBm

MAX

MAX

(Note 3) 1.5 5 dBm

MAX

MAX

(Note 3) 1.5 4 dBm

MAX

12.5 14 14.5 dB

4.5 5.5

3.0

-2.0 -1.0 -0.5 dB

12 13.5 dBm

11.5 13 14.5 dB

8.5 10 11.5 dB

12 13.5 15.5 dB

dBm

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

_______________________________________________________________________________________ 5

Pin Description

PIN

MAX2323 MAX2325

1 1 RLNA

— 2, 10, 23 N.C. No Connection. Leave this pin floating.

2 — PLNAIN

3, 8, 11,

12, 13, 18,

24, 25, 27

4 4 CLNAIN

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

10 — LOHIN

14 14 MODE Logic Input. See Tables 1 and 2 for details.

15 15 FMOUT

16 16 V

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

19, 20 19, 20

21 21 RBIAS

22 22 CMIXIN

23 — PMIXIN

26 — PLNAOUT

—

3, 8, 11, 12,

13, 17, 18,

24, 25, 27

26

NAME FUNCTION

L N A B i a s - S e t t i ng P i n . F o r no m i n a l b i a s , c o n n ec t a 24 k Ω r es i s t o r t o g r o u n d . T h i s
r e si s t o r v a l u e c a n b e a d j u st e d t o a l t e r t h e l i n e a r i t y o f t h e i np u t L N A i n hi g h - g ai n ,
h i g h - l i n ea r i t y C D M A m o d e s .

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

GND Ground

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

Low-Frequency LO Input Port. Requires blocking capacitor, which may be used as
part of an optional matching network.

High-Frequency LO Input Port. Requires blocking capacitor, which may be used as
part of an optional matching network.

FM IF Output Port. Requires a pull-up inductor and a DC blocking capacitor, which
may be used as part of the matching network.

CC

CDMA-,
CDMA+

V

CC

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

Differential Output Port for CDMA Mode. Requires pull-up inductors and blocking
capacitors, which may be used as part of the matching network.

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

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

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

High-Band LNA Output Port. This port requires an external pull-up inductor and series
capacitor as part of the matching network.

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

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

6 _______________________________________________________________________________________

Pin Description (continued)

Table 1. MAX2323 Operational Modes

X: Don’t care

MAX2323 MAX2325 NAME FUNCTION

28 28 CLNAOUT

Slug Slug GND Ground

MODES

BAND

PCS Band, High Gain,
High Linearity (HGHL)

PCS Band, High Gain,
Low Linearity (Paging
Mode) (HGLL)

PCS Band, Midgain
(MGHL)

Cellular Band CDMA
Mode, High Gain, High
Linearity (HGHL)

P √√1X 00 0

P √√1X 01 0

P √√ 1X 100

C √√01 000

Low-Band LNA Output Port. This port requires an external pull-up inductor and series
capacitor as part of the matching network.

FUNCTION CTRL PIN

HGHL AMP

HGLL AMP

MGHL AMP

LGHL AMP

CDMA MIXER

FM MIXER

BAND

MODE

G1

G2

SLEEP

Cellular Band CDMA,
High Gain, Low Linearity
(Paging Mode) (HGLL)

Cellular Band, CDMA
Mode, Midgain (MGHL)

Cellular Band, CDMA
Mode, Low Gain (LGHL)

Cellular Band, FM Mode,
High Gain, Low Linearity
(HGLL)

Cellular Band, FM Mode,
Midgain

Cellular Band, FM Mode,
Low Gain

Shutdown — —— ———— XX XX 1

Undefined ——————— 1X11 0

Cellular Band, FM Mode,
High Gain, High Linearity
(HGHL)

C √√01 010

C √√ 01 100

C √√ 01 110

C √√00 01 0

C √√00 10 0

C √√00 11 0

C √ ———— √ 0000 0

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

_______________________________________________________________________________________ 7

Table 2. MAX2325 Operational Modes

X: Don’t care

FUNCTION CTRL PIN

MODES

BAND

Cellular Band CDMA
Mode, High Gain, High
Linearity (HGHL)

Cellular Band CDMA,
High Gain, Low Linearity
(Paging Mode) (HGLL)

Cellular Band, CDMA
Mode, Midgain (MGHL)

Cellular Band, CDMA
Mode, Low Gain (LGHL)

Cellular Band, FM Mode,
High Gain, Low Linearity
(HGLL)

Cellular Band, FM Mode,
Midgain

Cellular Band, FM Mode,
Low Gain

Shutdown ——————— XXX1

C √√1000

C √√1010

C √√1100

C √√ 1110

C √√0010

C √√0100

C √√0110

HGHL AMP

HGLL AMP

MGHL AMP

LGHL AMP

CDMA MIXER

FM MIXER

MODE

G1

G2

SLEEP

Cellular Band, FM Mode,
High Gain, High Linearity
(HGHL)

√√0000

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

8 _______________________________________________________________________________________

Table 3. Cellular LNA S Parameters in High-Gain High-Linearity Mode

Table 4. PCS LNA S Parameters in High-Gain High-Linearity Mode

FREQUENCY

(MHz)

700 0.623 -81.9 4.58 79.8 0.046 59.5 0.746 -29.5

750 0.627 -84.3 4.30 78.0 0.048 60.6 0.748 -30.2

800 0.629 -86.6 4.06 74.8 0.049 60.9 0.750 -30.9

850 0.631 -89.0 3.70 72.3 0.051 61.4 0.749 -31.1

900 0.632 -91.4 3.50 72.2 0.052 62.1 0.751 -32.3

950 0.635 -93.7 3.39 68.7 0.053 61.3 0.753 -33.0

1000 0.635 -96.0 3.08 66.3 0.053 62.7 0.753 -33.5

FREQUENCY

(MHz)

1700 0.671 -125.8 5.77 109.2 0.062 90.4 0.796 -50.3

S11

(MAG)

S11

(MAG)

S11

(PHASE)

S11

(PHASE)

S21

(MAG)

S21

(MAG)

S21

(PHASE)

S21

(PHASE)

S12

(MAG)

S12

(MAG)

(PHASE)

(PHASE)

S12

S12

S22

(MAG)

S22

(MAG)

S22

(PHASE)

S22

(PHASE)

1750 0.675 -126.9 5.66 109.3 0.064 89.9 0.800 -50.7

1800 0.685 -128.9 5.66 107.2 0.065 89.1 0.808 -51.7

1850 0.689 -130.8 5.56 106.3 0.066 88.7 0.812 -52.6

1900 0.694 -132.7 5.63 104.7 0.066 89.3 0.817 -53.6

1950 0.696 -134.3 5.54 102.7 0.066 90.6 0.820 -54.4

2000 0.700 -135.8 5.50 101.2 0.068 91.9 0.826 -55.3

2050 0.706 -137.3 5.41 99.0 0.070 92.6 0.832 -56.3

2100 0.712 -138.9 5.33 97.4 0.072 92.7 0.839 -57.4

2150 0.717 -140.4 5.24 95.0 0.073 93.0 0.844 -58.8

2200 0.718 -141.9 5.08 93.3 0.073 94.2 0.845 -60.1

2250 0.721 -143.2 4.99 91.2 0.074 96.2 0.849 -61.4

2300 0.724 -144.5 4.78 89.0 0.077 98.3 0.852 -62.9

2350 0.730 -145.6 4.64 87.7 0.081 99.2 0.858 -64.5

2400 0.735 -146.9 4.45 85.7 0.085 99.4 0.862 -66.5

2450 0.740 -147.9 4.33 85.4 0.087 99.3 0.867 -68.0

2500 0.746 -148.4 4.39 85.5 0.089 99.5 0.875 -69.1

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

_______________________________________________________________________________________ 9

Table 5. Cellular Mixer S11 in High-Gain
High-Linearity Mode

Table 6. PCS Mixer S11 in High-Gain
High-Linearity Mode

FREQUENCY

(MHz)

700 0.803 -17.5

750 0.792 -18.1

800 0.799 -18.8

850 0.769 -20.2

900 0.761 -21.9

950 0.751 -23.9

1000 0.738 -26.7

S11

(MAG)

S11

(PHASE)

FREQUENCY

(MHz)

1700 0.764 -42.6

1750 0.763 -44.1

1800 0.764 -45.8

1850 0.763 -47.3

1900 0.765 -48.5

1950 0.762 -50.0

2000 0.762 -50.1

2050 0.762 -50.0

2100 0.762 -49.9

2150 0.762 -49.9

2200 0.762 -50.0

2250 0.762 -50.0

2300 0.762 -49.9

2350 0.762 -50.1

S11

(MAG)

S11

(PHASE)

2400 0.751 -64.4

2450 0.750 -64.3

2500 0.750 -64.2

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

10 ______________________________________________________________________________________

Table 7. Mixer IF Port S22

FREQUENCY

(MHz)

50 0.999 -2.1 50 0.998 -1.7

100 0.997 -4.1 70 0.998 -2.5

110 0.996 -4.5 85 0.998 -2.8

130 0.995 -5.5 100 0.998 -3.6

150 0.994 -6.2 110 0.998 -4.0

200 0.993 -8.2 150 0.998 -5.4

210 0.992 -8.6 200 0.998 -7.2

250 0.986 -10.0 250 0.997 -8.9

300 0.983 -12.0 300 0.997 -10.6

350 0.982 -13.9 350 0.997 -12.1

400 0.977 -15.8 400 0.997 -13.8

DIGITAL MIXER

(SINGLE-ENDED)

S22

(MAG)

S22

(PHASE)

FREQUENCY

(MHz)

S22

(MAG)

FM MIXER

S22

(PHASE)

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

______________________________________________________________________________________ 11

Typical Application Circuits

PCS

CELLULAR

SLEEP

CELLULAR

V

CC

PCS

27

28 22

1

2

3

4

5

2526

MAX2323

2324

21

20

19

18

17

BAND

V

CC

CDMA

V

CC

G2

G1

CELLULAR LO

PCS LO

6

7

8

10 11 12 13 14

9

16

FM

15

MODE

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

12 ______________________________________________________________________________________

Typical Application Circuits (continued)

V

CC

27

28 22

1

SLEEP

2

3

4

5

G2

6

G1

7

8

9

VCO

2526

2324

MAX2325

10 11 12 13 14

MODE

V

CC

21

20

19

18

17

16

15

CDMA

V

CC

FM

MAX2323/MAX2325

Triple/Dual-Mode

CDMA LNA/Mixers

______________________________________________________________________________________ 13______________________________________________________________________________________ 13

Component List

EV Kit Information

DESIGNATION QTY DESCRIPTION

C1, C4, C9,

C24, C29

C2, C3,

C21, C22, C27

C17 1

C7 1

C8 1

C12 1 0Ω resistor (0402)

C6, C10 — Not installed

C11, C18, C19,

C26, C28,

C32, C33

C5, C14, C16 3

C15 1

C23, C25 2

C31 1

L1 1

L2, L4 2

L3, L6 2 0Ω resistors (0603)

L5 1

0.01µF ±10% ceramic caps (0402)
Murata GRM36X7R103K016 or

5

Taiyo Yuden EMK105B103KW
100pF ±5% ceramic caps (0402)

Murata GRM36COG101J050 or

5

Taiyo Yuden UMK105CH101JW

2.7pF ±0.1pF ceramic cap (0402)
Murata GRM36COG2R7B050 or
Taiyo Yuden EVK105CH2R7JW

3.0pF ±0.1pF ceramic cap (0402)
Murata GRM36COG3R0B050 or
Taiyo Yuden EVK105CH3R0JW

1.5pF ±0.1pF ceramic cap (0402)
Murata GRM36COG1R5B050 or
Taiyo Yuden EVK105CH1R5BW

1000pF ±10% ceramic caps (0402)
Murata GRM36X7R102K050 or

7

Taiyo Yuden UMK105B102KW
6800pF ±10% capacitors (0402)

Murata GRM36X7R682K025 or
Taiyo Yuden TMK105B682KW

1.0pF ±0.1pF ceramic cap (0402)
Murata GRM36COG010B050 or
Taiyo Yuden EVK105CH010BW

5.6pF ±0.25pF ceramic caps (0402)
Murata GRM36COG5R6C050

4.3pF ±0.1pF ceramic cap (0402)
Murata GRM36COG4R3B050 or
Taiyo Yuden EVK105CH4R3JW

8.2nH ±5% inductor (0603)
Murata LQG11A8N2J00

1.8nH ±10% inductors (0603)

Coilcraft 0603CS-1N8XKBC

6.8nH ±5% inductor (0603)
Murata LQG11A6N8J00

DESIGNATION QTY DESCRIPTION

L7, L8 2

L10 1

L11 1

L12 1

R1, R4, R5,

R8, R10

R2 1 24.3kΩ ±1% resistor (0402)

R3 1 20.0kΩ ±1% resistor (0402)

R7 1 2.7kΩ ±5% resistor (0402)

R11 1 8.2kΩ ±5% resistor (0402)

T1 1

PLNAIN,

CLNAIN,

LOLIN, LOHIN,

CLNAOUT,

PLNAOUT,

CDMAOUT,

FMOUT

PMIXIN,

CMIXIN

GND, VCC 2

JU1, JU3, JU4,

JU7, JU9

JU2, JU6, JU8,

JU10

None 10 Shunts (JU1–JU4, JU6–JU10)

U1 1 MAX2323EGI (QFN-28)

None 1 MAX2323/MAX2325 data sheet

None 1 MAX2323 PC board

51kΩ ±5% resistors (0402)

8

2

5 3-pin headers

4 2-pin headers

270nH ±2% inductors (0805)
Coilcraft 0805CS-271XGBC

3.9nH ±0.3nH inductor (0603)
Murata LQG11A3N9S00

330nH ±2% inductor (0805)
Coilcraft 0805CS-331XGBC

2.7nH ±0.3nH inductor (0603)
Murata LQG11A2N7S00

Balun transformer (B5F type)
Toko 458DB-1011

SMA connectors (PC edge mount)
EFJohnson 142-0701-801 or
Digi-Key J502-ND

SMA connectors (vertical mount)
Digi-Key J500-ND

Test points
Mouser 151-203

MAX2323/MAX2325

Triple/Dual-Mode
CDMA LNA/Mixers

MAX2323

U1

CLNAOUT

RLNA

PLNAIN

GND

CLNAIN

SLEEP

G2

G1

RBIAS

IF+

IF-

GND

BAND

V

CC

FM

GND PLNAOUT GND GND PMIXIN CMIXIN

GND LOLIN LOHIN GND GND GND MODE

JU2

C2

100pF

L1

8.2nH

L4

1.8nH

C7

3.0pF

R2

24.3k

SMA

CLNAOUT

SMA

PLNAIN

C1

0.01µF

V

CC

JU10

C3

100pF

L2

1.8nH

C4

0.01µF

V

CC

C14

6800pF

SMA

CLNAIN

C16

6800pF

C15

1.0pF

L5

6.8nH

C17

2.7pF

C11

1000pF

JU1

V

CC

R1

1k

C18

1000pF

C27

100pF

C26

1000pF

C28

1000pF

C29

0.01µF

JU3

V

CC

R4

1k

C19

1000pF

JU4

V

CC

R5

1k

SMA

LOLIN

C21

100pF

SMA

LOHIN

C22

100pF

R10

1k

JU9

V

CC

C32

1000pF

SMA

FMOUT

JU8

L11

330nH

V

CC

R11

8.2k

R7

2.7k

C33

1000µF

C31

4.3pF

V

CC

GND

V

CC

JU7

V

CC

R8

1k

JU6

V

CC

L7

270nH

C24

0.01µF

C23

5.6pF

C25

5.6pF

L8

270nH

3

2

1

4

6

SMA

CDMAOUT

T1

458DB-1011

R3

20k

L6

0Ω

SMA

CMIXIN

L10

3.9nH

C10

OPEN

C9

0.01µF

L3

0Ω

SMA

PMIXIN

L12

2.7nH

C6

OPEN

C5

6800pF

SMA

PLNAOUT

C8

1.5pF

1

2

3

4

5

6

7

8 9 10 11 12 13 14

15

16

17

18

19

20

21

22232425262728

C12

0Ω

L9

OPEN

L12 POSITION: 1mm FROM C5

Figure 1. MAX2323 Evaluation Kit

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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