Rainbow Electronics MAX2389 User Manual

General Description

The MAX2387/MAX2388/MAX2389 low-noise amplifier
(LNA), downconverter mixers designed for W-CDMA
applications, are ideal for ARIB (Japan) and ETSI­UMTS (Europe) based systems. The MAX2387/
MAX2388/MAX2389 feature ultra-low current consump­tion and exceptionally low noise figures in ultra-small
packages.

The MAX2387/MAX2388 include an LNA, a downcon­verter mixer, and a local-oscillator (LO) buffer. The
MAX2389 has an LNA and mixer, but minimizes current
consumption by omitting the LO buffer. For all devices,
the LNA and downconverter mixers are optimized for
the 2110MHz to 2170MHz band. All devices feature a
high-gain mode and a low-gain mode of LNA operation.
The MAX2387 has a 32dB gain step, and the
MAX2388/MAX2389 have an 18dB gain step. All ICs
include a shutdown mode, powering down the IC dur­ing the front-end receiver’s idle periods.

The mixer 3rd-order nonlinearity performance is set
using an external biasing resistor. For the MAX2387/
MAX2388, mixer performance is optimized for a

-10dBm typical drive at the LO buffer input port. The
MAX2389 mixer performance is optimized for a

-4dBm typical drive at the LO input port. The LO port
for all versions is configurable for either single-ended or
differential operation.

These devices operate from a +2.7V to +3.3V single sup­ply and are available in ultra-small (3mm ✕3mm) 12-pin
leadless packages (QFN).

________________________Applications

Japanese 3rd-Generation W-CDMA Cellular
Phones

Dual-Mode W-CDMA/GSM Cellular Phones

Features

♦ Ultra-Low Current Consumption: 10.7mA

(MAX2387), 9.9mA (MAX2388), and 7.9mA
(MAX2389)

♦ +2.7V to +3.3V Single-Supply Operation

♦ Mixer NF: 7dB SSB

♦ Cascaded Noise Figure: 2.3dB

♦ LNA Low-Gain Mode: 32dB Gain Step (MAX2387)

or 18dB Gain Step (MAX2388/MAX2389)

♦ Mixer IIP3: 6dBm

♦ < 1µA Shutdown Current

♦ Ultra-Small (3mm

✕

3mm) 12-Pin QFN Package

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

________________________________________________________________ Maxim Integrated Products 1

Pin Descriptions/Functional Diagrams

19-1834; Rev 1; 5/01

EVALUATION KIT

AVAILABLE

Ordering Information

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP. RANGE PIN-PACKAGE

MAX2387EGC -40°C to +85°C 12 QFN

MAX2388EGC -40°C to +85°C 12 QFN

MAX2389EGC -40°C to +85°C 12 QFN

TOP VIEW

1LNA_OUT

2GAIN

3MIX_IN

BIAS11GND10LNA_IN

12

BIAS

45

LO+6LO-

SHDN

MAX2387/MAX2388

9 V

8 IF+

7 IF-

CC

1LNA_OUT

2GAIN

3MIX_IN

BIAS11GND10LNA_IN

12

BIAS

45

LO+6LO-

SHDN

MAX2389

9 V

8 IF+

7 IF-

CC

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +3.3V, SHDN = high, R

BIAS

= 24kΩ, no input AC signals, TA= -40°C to +85°C. Typical values are at VCC= +2.7V,

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 to +4.3V

SHDN, GAIN to GND..................................-0.3V to (V

CC

+ 0.3V)

AC Signals ....................................................................+1V peak

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

Continuous Power Dissipation (T

A

= +70°C)

12-Pin QFN (derate 11.9mW/°C above T

A

= +70°C)...952mW

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

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

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

Soldering Temperature (10s) ...........................................+300°C

AC ELECTRICAL CHARACTERISTICS

(MAX238_ EV kit, VCC= 2.7V, SHDN = high, f

RF_IN

= f

LNA_IN

= 2140MHz, fLO= 2330MHz (fIF= 190MHz). Mixer, LNA, and LO input

ports are driven with 50Ω sources. R

BIAS

= 24kΩ ±1%, PLO= -10dBm (MAX2387/MAX2388), PLO= -4dBm (MAX2389), PRF=

-30dBm. Typical values are at V

CC

= +2.7V, TA= +25°C, unless otherwise noted.)

Operating Supply Current I

Shutdown Supply Current I

Digital Input Logic High V

Digital Input Logic Low V

Input Logic High Current I

Input Logic Low Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

High-gain mode

CC

Low-gain mode

SHDN = low 0.2 1.0 µA

CC

IH

IL

VIN = V

IH

IL

VIN = V

IH

IL

MAX2387 10.7 12.4

MAX2388 9.9 11.7

MAX2389 7.9 9.3

MAX2387 7.2 8.7

MAX2388 6.7 8.1

MAX2389 4.7 5.7

2.0 V

0.6 V

1µA

-20 µA

mA

LNA PERFORMANCE: LOW-GAIN MODE (GAIN = HIGH)

RF Frequency Range (Note 1) f

Gain G

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF

LNA

TA = +25°C 13.5 15 16.5

TA = -40°C to +85°C (Note 2) 12.9 17.0

2110 2170 MHz

dB

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX238_ EV kit, VCC= 2.7V, SHDN = high, f

RF_IN

= f

LNA_IN

= 2140MHz, fLO= 2330MHz (fIF= 190MHz). Mixer, LNA, and LO input

ports are driven with 50Ω sources. R

BIAS

= 24kΩ ±1%, PLO= -10dBm (MAX2387/MAX2388), PLO= -4dBm (MAX2389), PRF=

-30dBm. Typical values are at V

CC

= +2.7V, TA= +25°C, unless otherwise noted.)

Noise Figure (Notes 1, 3) NF

3rd-Order Input Intercept Point
(Note 4)

Input -1dB Compression Point
(Note 1)

LNA PERFORMANCE: LOW-GAIN MODE (GAIN = LOW)

Gain G

Noise Figure (Notes 1, 3) NF

3rd-Order Input Intercept Point
(Note 5)

Input -1dB Compression Point IP

MIXER PERFORMANCE (GAIN = HIGH)

RF Frequency Range (Note 1) f

LO Frequency Range (Note 1) f

IF Frequency Range (Note 1) f

Power Conversion Gain G

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LNA

IIP3

LNA

IP

-1dB

LNA

LNA

IIP3

LNA

-1dB

RF

LO

IF

MXR

MXR

TA = +25°C 1.7 2.2 dB

TA = -40°C to +85°C (Note 2) 4.2 dBm

TA = +25°C

TA = -40°C to +85°C
(Note 2)

TA = +25°C 8.5 10 11.5

TA = -40°C to +85°C (Note 2) 7.5 12.5

TA = +25°C

-19 -13 dBm

MAX2387 -18.5 -16.5 -14.5

MAX2388/
MAX2389

MAX2387 -10.5 -14

MAX2388/
MAX2389

MAX2387 19.2 21.3

MAX2388/
MAX2389

MAX2387 1

MAX2388/
MAX2389

MAX2387 -9.9

MAX2388/
MAX2389

MAX2387 7.2 8.8

MAX2388 6.8 8.2Noise Figure (SSB) (Note 1) NF

MAX2389 7.3 9.5

-4.7 -2.8 -0.9

5.4 -0.7

6.5 8.4

3.4

-7.7

2110 2170 MHz

2250 2600 MHz

150 400 MHz

dB

dB

dBm

dBm

dB

dB

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX238_ EV kit, VCC= 2.7V, SHDN = high, f

RF_IN

= f

LNA_IN

= 2140MHz, fLO= 2330MHz (fIF= 190MHz). Mixer, LNA, and LO input

ports are driven with 50Ω sources. R

BIAS

= 24kΩ ±1%, PLO= -10dBm (MAX2387/MAX2388), PLO= -4dBm (MAX2389), PRF=

-30dBm. Typical values are at V

CC

= +2.7V, TA= +25°C, unless otherwise noted.)

Note 1: Guaranteed by design and characterization.
Note 2: MIN guaranteed by production test, MAX guaranteed by design and characterization.
Note 3: Includes input matching circuit loss.
Note 4: f

IN1

= 2140MHz, f

IN2

= 2141MHz, PIN= -30dBm per tone.

Note 5: f

IN1

= 2140MHz, f

IN2

= 2141MHz, PIN= -25dBm per tone.

3rd-Order Input Intercept Point
(Notes 1, 3)

Input -1dB Compression Point
(Note 1)

MIXER PERFORMANCE (GAIN = LOW)

Power Conversion Gain (Note 1) G

3rd-Order Input Intercept Point
(Note 4)

Input -1dB Compression Point
(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

IIP3

MXR

IP

- 1dB,M XRTA

MXR

MXR

IIP3

MXR

IP

- 1dB,M XRTA

= -40°C to +85°C

TA = +25°C 7.5 9.0 10.5

TA = -40°C to +85°C 6.5 12.0

TA = +25°C

TA = +25°C

= -40°C to +85°C

MAX2387 6

MAX2388 6

MAX2389 5

MAX2387 -13.9 -10

MAX2388 -16.3 -10.5

MAX2389 -15.4 -10.5

MAX2387 6.9 8.4

MAX2388 6.1 7.4Noise Figure (SSB) (Note 1) NF

MAX2389 6.6 8.8

MAX2387 0.7

MAX2388 0.2

MAX2389 1.3

MAX2387 -15.0 -10.7

MAX2388 -18.2 -11.3

MAX2389 -17.8 -11.9

dBm

dBm

dB

dB

dBm

dBm

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

_______________________________________________________________________________________ 5

)

)

)

Typical Operating Characteristics

(TA = +25°C, VCC= +2.7V, unless otherwise noted.)

MAX2387

SUPPLY CURRENT vs. TEMPERATURE

MAX2387/88/89 toc01

GAIN (dB)

20

15

10

-5

-10

-15

-20

16

VCC = +2.7V

14

HIGH-GAIN

12

10

VCC = +2.7V
LOW-GAIN

8

SUPPLY CURRENT (mA)

6

4

2

-40 10-15 356085

VCC = +3.3V
LOW-GAIN

TEMPERATURE (°C)

VCC = +4.3V
HIGH-GAIN

VCC = +4.3V
LOW-GAIN

VCC = +3.3V
HIGH-GAIN

MAX2387

MIXER CONVERSION GAIN

vs. LO INPUT POWER

12

10

8

6

4

CONVERSION GAIN (dB)

2

0

-13 -11 -10-12 -9-8-7
LO INPUT LEVEL (dBm)

HIGH-GAIN MODELOW-GAIN MODE

MAX2387/88/89 toc04

30

25

20

15

10

IIP (dBm)

-5

-10

MAX2387

MIXER LO-IF AND LO-RF ISOLATION

vs. LO FREQUENCY

40

35

LO-RF: LOW-GAIN
MODE

30

25

LO-IF: LOW-GAIN

20

MODE

ISOLATION (dB)

15

10

LO-IF: HIGH-GAIN

5

MODE

0

2300 23202310 2330 2340 2350 2360

LO-RF: HIGH-GAIN
MODE

FREQUENCY (MHz

VCC = +2.7V
LO = -10dBm

MAX2387/88/89 toc07

NOISE FIGURE (dB)

25

20

15

10

LNA GAIN vs. TEMPERATURE

5

0

-40 -15 10 35 60 85

MIXER IIP2 AND IIP3 vs. TEMPERATURE

IIP2: HIGH-GAIN
MODE, SINGLE­ENDED LO

5

0

IIP3: HIGH-GAIN
MODE

-40 -15 10 35 60 85

LNA NOISE FIGURE vs. FREQUENCY

5

0

2110 21302120 2140 2150 2160 2170

MAX2387

HIGH-GAIN MODE

LOW-GAIN MODE

TEMPERATURE (°C)

MAX2387

IIP3: LOW-GAIN
MODE

TEMPERATURE (°C)

MAX2387

LOW-GAIN MODE

HIGH-GAIN MODE

FREQUENCY (MHz

IIP2: HIGH-GAIN
MODE, DIFFERENTIAL
LO

10

8

MAX2387/88/89 toc02

6

4

2

0

IIP3 (dBm)

-2

-4

-6

-8

-10

-40 10-15 35 60 85

MIXER INPUT -1dB COMPRESSION POINT

-6

-8

MAX2387/88/89 toc05

-10

-12

-14

-1dB COMPRESSION POINT (dBm)

-16

-40 10-15 35 60 85

MIXER NOISE FIGURE vs. LO POWER

8

MAX2387/88/89 toc08

7

6

NOISE FIGURE (dB)

5

4

-13 -10-12 -11 -9 -8 -7

MAX2387

LNA IIP3 vs. TEMPERATURE

HIGH-GAIN MODE

LOW-GAIN MODE

TEMPERATURE (°C)

MAX2387

vs. TEMPERATURE

TEMPERATURE (°

C

MAX2387

HIGH-GAIN MODE

LOW-GAIN MODE

LO POWER (dB)

MAX2387/88/89 toc03

MAX2387/88/89 toc06

MAX2387/88/89 toc09

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(TA = +25°C, VCC= +2.7V, unless otherwise noted.)

SUPPLY CURRENT vs. TEMPERATURE

16

14

VCC = +2.7V
HIGH-GAIN

12

10

8

SUPPLY CURRENT (mA)

6

VCC = +2.7V

4

LOW-GAIN

2

-40 10-15 35 60 85

MAX2388

VCC = +3.3V
HIGH-GAIN

VCC = +4.3V
LOW-GAIN

VCC = +3.3V
LOW-GAIN

TEMPERATURE (°C)

VCC = +4.3V
HIGH-GAIN

MAX2387/88/89 toc10

GAIN (dB)

LNA GAIN vs. TEMPERATURE

20

15

10

5

0

-5

-40 10-15 35 60 85

HIGH-GAIN MODE

LOW-GAIN MODE

TEMPERATURE (°C)

MAX2388

MAX2387/88/89 toc11

IIP3 (dBm)

MAX2388

LNA IIP3 vs. TEMPERATURE

10

8

6

4

2

0

-2

-4

-6

-8

-10

-40 10-15 356085

HIGH-GAIN MODE

LOW-GAIN MODE

TEMPERATURE (°C)

MAX2387/88/89 toc12

MAX2388

MIXER CONVERSION GAIN

12

vs. LO INPUT POWER

10

8

6

4

CONVERSION GAIN (dB)

2

0

-13 -11 -10-12 -9-8-7
LO INPUT LEVEL (dBm)

HIGH-GAIN MODELOW-GAIN MODE

MAX2387/88/89 toc13

MIXER IIP2 AND IIP3 vs. TEMPERATURE

30

25

IIP2: HIGH-GAIN

20

MODE,
SINGLE-ENDED LO

15

10

IIP (dBm)

5

0

IIP3: HIGH-GAIN

-5
MODE

-10

-40 -15 10 35 60 85

MAX2388

IIP2: HIGH-GAIN
MODE, DIFFERENTIAL LO

IIP3: LOW-GAIN
MODE

TEMPERATURE (°C)

MAX2388

MIXER LO-IF AND LO-RF ISOLATION

vs. LO FREQUENCY

40

35

LO-RF: LOW-GAIN
MODE

30

25

LO-IF: LOW-GAIN

20

MODE

ISOLATION (dB)

15

10

LO-IF: HIGH-GAIN

5

MODE

0

2300 23202310 2330 2340 2350 2360

FREQUENCY (MHz)

LO-RF: HIGH-GAIN
MODE

VCC = +2.7V
LO = -10dBm

MAX2387/88/89 toc16

NOISE FIGURE (dB)

LNA NOISE FIGURE vs. FREQUENCY

10

8

6

4

2

0

2110 21302120 2140 2150 2160 2170

MAX2388

LOW-GAIN MODE

HIGH-GAIN MODE

FREQUENCY (MHz)

MIXER INPUT -1dB COMPRESSION POINT

-6

-8

MAX2387/88/89 toc14

-10

-12

-14

-1dB COMPRESSION POINT (dBm)

-16

-40 10-15 35 60 85

MIXER NOISE FIGURE vs. LO POWER

8

MAX2387/88/89 toc17

7

6

NOISE FIGURE (dB)

5

4

-13 -10-12 -11 -9 -8 -7

MAX2388

vs. TEMPERATURE

MAX2387/88/89 toc15

TEMPERATURE (°C)

MAX2388

HIGH-GAIN MODE

MAX2387/88/89 toc18

LOW-GAIN MODE

LO POWER (dB)

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(TA = +25°C, VCC= +2.7V, unless otherwise noted.)

SUPPLY CURRENT vs. TEMPERATURE

12

10

8

VCC = +2.7V

6

HIGH-GAIN

4

SUPPLY CURRENT (mA)

2

0

-40 10-15 356085

12

10

8

6

4

CONVERSION GAIN (dB)

2

0

-13 -11 -10-12 -9-8-7

MIXER LO-IF AND LO-RF ISOLATION

50

45

LO-RF: LOW-GAIN

40

MODE

35

LO-IF: LOW-GAIN
MODE

30

ISOLATION (dB)

25

20

LO-IF: HIGH-GAIN
MODE

15

10

2300 23202310 2330 2340 2350 2360

MAX2389

VCC = +3.3V
HIGH-GAIN

VCC = +2.7V
LOW-GAIN

TEMPERATURE (°C)

VCC = +4.3V
HIGH-GAIN

VCC = +4.3V
LOW-GAIN

VCC = +3.3V
LOW-GAIN

MAX2389

MIXER CONVERSION GAIN

vs. LO INPUT POWER

HIGH-GAIN MODELOW-GAIN MODE

LO INPUT LEVEL (dBm)

MAX2389

vs. LO FREQUENCY

LO-RF: HIGH-GAIN
MODE

VCC = +2.7V
LO = -4dBm

FREQUENCY (MHz)

MAX2387/88/89 toc19

GAIN (dB)

MAX2387/88/89 toc22

IIP (dBm)

MAX2387/88/89 toc25

NOISE FIGURE (dB)

20

15

10

-5

30

25

20

15

10

5

0

-5

-10

10

8

6

4

2

0

LNA GAIN vs. TEMPERATURE

MAX2389

HIGH-GAIN MODE

5

0

-40 10-15 35 60 85

LOW-GAIN MODE

TEMPERATURE (°C)

MAX2389

MIXER IIP2 AND IIP3 vs. TEMPERATURE

IIP2: HIGH-GAIN
MODE,
SINGLE-ENDED LO

IIP3: HIGH-GAIN
MODE

-40 -15 10 35 60 85
TEMPERATURE (°C)

IIP2: HIGH-GAIN
MODE,
DIFFERENTIAL LO

IIP3: LOW-GAIN
MODE

MAX2389

LNA NOISE FIGURE vs. FREQUENCY

LOW-GAIN MODE

HIGH-GAIN MODE

2110 21302120 2140 2150 2160 2170

FREQUENCY (MHz)

10

8

MAX2387/88/89 toc20

6

4

2

0

IIP3 (dBm)

-2

-4

-6

-8

-10

-40 10-15 356085

MIXER INPUT -1dB COMPRESSION POINT

-6

-8

MAX2387/88/89 toc23

-10

-12

-14

-1dB COMPRESSION POINT (dBm)

-16

-40 10-15 35 60 85

MIXER NOISE FIGURE vs. LO POWER

9

MAX2387/88/89 toc26

8

7

6

NOISE FIGURE (dB)

5

4

-7 -5-6 -4 -3 -2 -1

LNA IIP3 vs. TEMPERATURE

MAX2389

HIGH-GAIN MODE

LOW-GAIN MODE

TEMPERATURE (°C)

MAX2389

vs. TEMPERATURE

TEMPERATURE (°C)

MAX2389

HIGH-GAIN MODE

LOW-GAIN MODE

LO POWER (dB)

MAX2387/88/89 toc21

MAX2387/88/89 toc24

MAX2387/88/89 toc27

MAX2387/MAX2388/MAX2389

Detailed Description

The MAX2387/MAX2388/MAX2389 include an LNA
and downconverter mixer. These devices feature a
shutdown mode to power down the IC during the front­end receiver’s idle periods. Each IC operates from a
+2.7V to +3.3V single supply and is housed in a 12-pin
ultra-small QFN (3mm ✕3mm) leadless package.

The MAX2387/MAX2388/MAX2389 are fabricated using
an advanced high-frequency silicon germanium
process. The LNA and mixer NF and IIP3 have been
optimized to provide excellent RF performance in the
2110MHz to 2170MHz band, while drawing minimal
current.

For the MAX2387/MAX2388, the mixer’s performance is
optimized for a -10dBm typical drive at the LO buffer
input port. The MAX2389’s mixer performance is opti­mized for a -4dBm typical drive at the LO input port.
The LO port for all versions can be driven either single­ended or differentially.

LNA High/Low-Gain Mode

These devices offer two modes of operation for the LNA:
high-gain mode and low-gain mode, selectable with a
GAIN select pin. The MAX2387 has a gain of 15dB in
high-gain mode and -16.6dB in low-gain mode. The
MAX2388/MAX2389 have a gain of 15dB in high-gain
mode and -2.8dB in low-gain mode. Matching LNA in
high-gain mode will ensure matching in low-gain mode.

Downconverter Mixer

The receive mixer is a wideband, single-balanced
design with exceptional noise figure and linearity. The
LO input frequency range is 2330MHz to 2360MHz and
the RF input frequency range is 2110MHz to 2170MHz.
The mixer is internally matched to 50Ω, thus eliminating
any external matching components.

LO Input Buffers

The MAX2387/MAX2388 feature open-collector LO
buffers to increase isolation between the LO and the
rest of the system. The MAX2389 offers a lower current
consumption for applications that do not require an LO
buffer.

RF Inputs

The MIX_IN input is typically connected to the LNA out­put through an off-chip filter providing image rejection
and out-of-band interferers filtering. The LNA input and
output require an external matching network to 50Ω.
Note that the mixer input is internally matched to 50Ω.
See Figure 1, Typical Application Circuits for 2.14GHz.

LO Inputs

The LO+ and LO- pins are internally terminated with
100Ω resistors. AC-couple the local-oscillator signal to
these pins. If a single-ended LO source is used, con­nect LO+ to ground using an AC-coupling capacitor.

W-CDMA LNA/Mixer ICs

8 _______________________________________________________________________________________

Pin Description

PIN NAME FUNCTION

1 LNA_OUT RF Output Port for LNA. Requires external matching.

2 GAIN LNA/Mixer Gain Control Input

3 MIX_IN RF Input Port for Mixer. Internally matched to 50Ω.

4 SHDN

5 LO+

6 LO-

7 IF- Inverting Mixer’s IF Open-Collector Output

8 IF+ Noninverting Mixer’s IF Open-Collector Output

9VCCSupply Voltage (+2.7V to +3.3V). Capacitively bypass to GND near the IC.

10 LNA_IN RF Input Port for LNA. Requires external matching.

11 GND Ground

12 BIAS LNA/Mixer Bias Pin. For nominal bias, connect 24kΩ ±1% resistor to GND.

Shutdown Input. Drive low to enable shutdown mode. Drive high or connect to V
operation.

Noninverting LO Input for LO Buffer (MAX2387/MAX2388) or Mixer (MAX2389). Differential input
impedance is 200Ω. AC-couple to GND when the LO is driven single-endedly.

Inverting LO Input for LO Buffer (MAX2387/MAX2388) or Mixer (MAX2389). Differential input
impedance is 200Ω.

for normal

CC

IF Output Port

The mixer output appears on the differential IF+ and IF­pins. These open-collector outputs require an external
inductor to VCCfor DC biasing. This port typically
requires a matching network for coupling to an external
IF filter. Figures 1 and 2 show examples of differential
and single-ended IF port connections.

Applications Information

Layout

A properly designed PC board is essential to any
RF/microwave circuit. Keep RF signal lines as short as
possible to minimize losses and radiation. Always use
controlled impedance lines on all high-frequency inputs
and outputs and use low-inductance connections to
ground on all GND pins. At the mixer outputs, keep the
differential lines together and of the same length to
ensure signal balance.

For the best gain and noise performance, use high­quality components for the LNA input matching circuit,
and solder the slug evenly to the board ground plane.

For the power supplies, a star topology works well to
isolate between different sections of the device. Each
V

CC

node has its own path to a central VCC. Place
decoupling capacitors that provide low impedance at
the RF frequency of interest close to all VCCconnec­tions. The central VCCshould have a large decoupling
capacitor as well. (Use MAX2387/MAX2388/MAX2389
EV kit as an example.)

Chip Information

TRANSISTOR COUNT: 208

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

_______________________________________________________________________________________ 9

Figure 1. MAX2387/MAX2388/MAX2389 Differential IF Load; Single-Ended VCO

Typical Application Circuits

2.2nH

RX

24kΩ

GND

RX BPF

0.8pF

2.2nH

6800pF

0.8pF

TX

LNA_OUT

10nF

10kΩ

GAIN

20Ω

V

CC

MIX_IN

1

2

3

10nF

BIAS_SET

10kΩ

SHDN

12

11

MAX2387
MAX2388
MAX2389

45

82pF

LO+

BIAS

LNA_IN

10

6

LO-

82pF

VCO

V

CC V

6800pF

9

8

IF+

10kΩ

7

IF-

27nH

27nH

22pF

39pF

39pF

10µF

CC

IF

SAW

Z

L

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

10 ______________________________________________________________________________________

Figure 2. MAX2387/MAX2388/MAX2389 Differential IF Load; Differential VCO

2.2nH

RX BPF

0.8pF

2.2nH

6800pF

10nF

BIAS

1

2

3

10kΩ

SHDN

24kΩ

MAX2387
MAX2388
MAX2389

RX

0.8pF

TX

LNA_OUT

10nF

10kΩ

GAIN

20Ω

V

CC

MIX_IN

GND

12

11

45

LO+

82pF

5.6nH

BIAS

9

IF+

8

IF-

7

V

CC

6800pF

27nH

10kΩ 27nH

IF

OUT

39pF

39pF

V

10nF

22pF

CC

IF

SAW

Z

L

LNA_IN

10

6

LO-

82pF

VCO

MAX2387/MAX2388/MAX2389

W-CDMA LNA/Mixer ICs

Table 1. LNA Input/Output S-Parameters (VCC= +2.7V, High-Gain Mode)

Package Information

For the latest package outline information, go to
www.maxim-ic.com/packages.

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.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11

© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

S-PARAMETERS LNA (S11) LNA (S21) LNA (S12) LNA (S22)

FREQUENCY

(MHZ)

600 0.83287 -41.655 5.2176 146.82 0.020023 79.051 0.92461 -15.535

700 0.81889 -43.792 5.0791 145.33 0.021153 78.88 0.9171 -16.23

800 0.80364 -46.486 4.9464 143.26 0.022406 78.412 0.91098 -17.187

900 0.78522 -49.489 4.7767 141.09 0.023962 79.181 0.90108 -18.177

1000 0.76638 -53.118 4.6109 138.2 0.025913 78.989 0.8914 -19.536

1100 0.74542 -56.424 4.4363 135.68 0.027189 79.621 0.87913 -20.759

1200 0.72614 -59.477 4.2861 133.2 0.028484 79.666 0.86957 -22.045

1300 0.70338 -62.232 4.1209 130.93 0.030015 80.686 0.85623 -23.156

1400 0.68291 -64.933 4.0146 128.4 0.030979 81.41 0.84504 -24.46

1500 0.66114 -67.298 3.8951 126.82 0.032236 82.856 0.83313 -25.525

1600 0.63958 -69.782 3.7818 124.53 0.033056 83.763 0.82095 -26.882

1700 0.61641 -72.041 3.6761 122.88 0.03398 85.56 0.80875 -28.147

1800 0.59303 -74.571 3.5823 120.51 0.035009 86.377 0.79497 -29.825

1900 0.56989 -76.974 3.5198 118.87 0.036332 88.572 0.78338 -31.503

2000 0.54509 -79.651 3.4376 116.77 0.036887 89.686 0.76891 -33.44

2100 0.52084 -82.452 3.3691 115.17 0.038318 91.409 0.75735 -35.559

2200 0.49554 -85.891 3.2858 112.47 0.039355 93.409 0.74365 -38.175

2300 0.47232 -89.473 3.2544 110.28 0.040817 94.973 0.73415 -41.034

2400 0.44892 -93.529 3.195 108.05 0.042049 97.086 0.72262 -44.165

2500 0.42766 -98.164 3.1347 105.62 0.043438 98.58 0.71335 -47.828

2600 0.40833 -103.42 3.06 102.94 0.044844 100.14 0.70474 -51.733

2700 0.39421 -109.16 2.9818 100.13 0.046899 101.7 0.70067 -56.04

2800 0.38321 -115.32 2.9149 96.964 0.048389 103.31 0.69795 -60.397

2900 0.37608 -121.52 2.821 94.462 0.049426 104.62 0.69514 -64.899

3000 0.37573 -128.03 2.7086 91.479 0.05079 106.39 0.69504 -69.425

3100 0.38123 -134.23 2.5802 88.528 0.051657 108.22 0.69915 -73.798

3200 0.39208 -139.73 2.4696 85.584 0.053915 110.43 0.70504 -77.625

3300 0.40626 -144.57 2.3296 83.264 0.055483 113.29 0.71095 -81.166

3400 0.42512 -148.8 2.2157 80.95 0.05783 115.29 0.71819 -84.4

3500 0.44708 -152.13 2.0519 79.588 0.060614 118.09 0.72516 -87.06

3600 0.47302 -154.7 1.9382 77.337 0.065129 119.23 0.73416 -89.168

3700 0.49849 -156.57 1.8048 76.594 0.069104 120.99 0.73997 -90.676

MAGNITUDE PHASE MAGNITUDE PHASE MAGNITUDE PHASE MAGNITUDE PHASE