MAXIM MAX2058 Technical data

General Description

The MAX2058 high-linearity digital-variable-gain ampli­fier (DVGA) is designed to provide 62dB of total gain
range and typical output IP3 and output P1dB levels of
+32.3dBm and +19dBm, respectively. The device is
ideal for a variety of applications, including RFID hand­held and portal readers, as well as single and multicar­rier 700MHz to 1200MHz GSM/EDGE, cdma2000

®

,
WCDMA, and iDEN®base stations. The MAX2058
yields a high level of component integration, which
includes two 5-bit, 31dB digital attenuators, a two-stage
driver amplifier, a loopback mixer, and a serial interface
to control the attenuators.

The MAX2058 is pin compatible with the MAX2059
1800MHz to 2200MHz DVGA, facilitating an easy
design-in for applications where a common PC board
layout is used for both frequency bands.

The MAX2058 is available in a 40-pin thin QFN pack­age with an exposed paddle. Electrical performance is
guaranteed over a -40°C to +85°C temperature range.

Applications

GSM 850/GSM 900 2G and 2.5G EDGE Base­Station Transmitters and Power Amplifiers

Cellular cdmaOne™, cdma2000, and Integrated
Digital Enhanced Network (iDEN) Base-Station
Transmitters and Power Amplifiers

WCDMA 850MHz and Other 3G Base-Station
Transmitters and Power Amplifiers

Transmitter Gain Control

Receiver Gain Control

Broadband Systems

Automatic Test Equipment

Digital and Spread-Spectrum Communication
Systems

Microwave Terrestrial Links

RFID Handheld and Portal Readers

Features

♦ +32.3dBm Typical Output IP3

♦ +19dBm Typical Output 1dB Compression Point

♦ 700MHz to 1200MHz RF Frequency Range

♦ 1800MHz to 2200MHz RF Frequency Range

(MAX2059)

♦ 10.5dB Typical Small-Signal Gain

♦ Includes Two Independent 31dB Attenuator

Stages, Yielding 62dB of Total Gain-Control
Range with 1dB Steps

♦ 3-Wire SPI™/MICROWIRE™-Compatible

♦ Integrated Loopback Mixer for Tx/Rx Self-

Diagnostics

♦ +5V Single-Supply Operation

♦ External Current-Setting Resistors for Scalable

Device Power

♦ Lead-Free Package Available

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-0512; Rev 0; 6/06

**

EP = Exposed paddle.

+

Denotes lead-free package.

T

= Tape-and-reel.

Pin Configuration/Functional Diagram appears at end of data
sheet.

SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
iDEN is a registered trademark of Motorola, Inc.
cdmaOne is a trademark of CDMA Development Group.

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

PART TEMP RANGE PIN-PACKAGE

MAX2058ETL -40°C to +85°C

MAX2058ETL-T -40°C to +85°C

MAX2058ETL+ -40°C to +85°C

MAX2058ETL+T -40°C to +85°C

40 Thi n Q FN - E P **

(6mm x 6mm)

40 Thi n Q FN - E P **

( 6m m x 6m m )

40 Thi n Q FN - E P **

( 6m m x 6m m )

40 Thi n Q FN - E P **

( 6m m x 6m m )

PKG

CODE

T4066-3

T4066-3

T4066-3

T4066-3

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, R1 = 1.2kΩ, R2 = 3.92kΩ, R3 = 2kΩ, TC= -40°C to +85°C. Typical

values are at V

CC

= +5.0V and TC= +25°C, unless otherwise noted.) (Note 1)

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.

V

CC

to GND ...........................................................-0.3V to +5.5V

RSET1, RSET2......................................................+1.2V to +4.0V

LBBIAS .......................................................(V

CC

- 1.5V) to +5.5V

LB_EN, DATA, CS, CLK .............................-0.3V to (V

CC

+ 0.3V)

ATTEN_INA, ATTEN_INB, ATTEN_OUTA, ATTEN_OUTB

Input Power .................................................................+24dBm

AMPIN, Differential LO Input Power ...............................+12dBm

Continuous Power Dissipation (T

A

= +70°C)

40-Pin TQFN (derated 26.3mW/°C above +70°C) ......2100mW

Operating Temperature Range (Note A) .............-40°C to +85°C

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

θ

JC

....................................................................................10°C/W

θ

JA

....................................................................................38°C/W

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

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

AC ELECTRICAL CHARACTERISTICS

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, PLO= -6dBm, fLO=

45MHz, f

LBOUT

= fRF- fLO, and TC= +25°C, unless otherwise noted.) (Note 1)

Note A: TCis the temperature on the exposed paddle of the package.

Supply Voltage V

Total Supply Current I

LOGIC INPUTS (DATA, CS, CLK, LB_EN)

Input High Voltage V

Input Low Voltage V

Input Current with Logic-High I

Input Current with Logic-Low I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

CC

IH

IL

Reference to VCC, VCCLB, VCCLOGIC,
VCCBIAS1, VCCBIAS2, VCCAMP

LB mixer disabled (LB_EN = 1) 134 156

LB mixer enabled (LB_EN = 0) 158 186

IH

IL

4.75 5.0 5.25 V

2.4 V

0.8 V

0.01 µA

0.01 µA

mA

RF Frequency (Note 2)

Small-Signal Gain A

Gain Variation vs. Temperature

Output Power P

Output Power Flatness PIN = 0dBm

Attenuation Range 62 dB

Output Third-Order Intercept
Point

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX2058 700 1200

MAX2059 1800 2200

fRF = 940MHz, TC = +25°C 8.4 10.5 12.8 dB

V

-0.014

32.3 dBm

OUT

OIP3

All attenuation
settings

PIN = 0dBm, fRF = 940MHz, TC = +25°C 8.4 10.5 12.8 dBm

Two tones: f
P

OUT1

= P

RF1

OUT2

TC = -40°C to +25°C

T

= +25°C to +85°C -0.021

C

800MHz to 900MHz 0.13

900MHz to 1000MHz -0.52

= 940MHz, f
= +5dBm

= 941MHz,

RF2

MHz

dB/°C

dB

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, PLO= -6dBm, fLO=

45MHz, f

LBOUT

= fRF- fLO, and TC= +25°C, unless otherwise noted.) (Note 1)

Output -1dB Compression Point
(Note 3)

RMS Error Vector Magnitude EVM P

Spurious Emissions in 30kHz
Bandwidth (Note 4)

Noise Figure NF 6.8 dB

Input Return Loss 50Ω source, minimum attenuation setting 18 dB

Output Return Loss 50Ω load, minimum attenuation setting 20 dB

5-BIT DIGITAL ATTENUATORS

Insertion Loss

Input Third-Order Intercept Point IIP3

Control Range 31 dB

Attenuation Step Size Variation
vs. Frequency

Attenuation Variation vs.
Temperature

Step Size 1dB

Relative Step Accuracy 800MHz to 1000MHz

Absolute Step Accuracy 800MHz to 1000MHz

Spurious Emissions in 300kHz
Bandwidth (Note 5)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OP

1dB

= +12dBm, EDGE modulation 0.5 %

OUT

200kHz offset -39.2

P

= +12dBm,

OUT

EDGE modulation

Attenuator measured separately Z
50Ω

Attenuator measured separately Z
50Ω, two tones: f
941MHz, P

800MHz to 900MHz ±0.08

900MHz to 1000MHz ±0.06

800MHz to 1000MHz,
T

= -40°C to +25°C

C

800MHz to 1000MHz,
T

= +25°C to +85°C

C

No RF input, attenuator A stepped from 0 to
2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB,
31dB to 0dB, with attenuator B at 0dB;
attenuator B stepped from 0 to 2dB, 7dB to
9dB, 15dB to 17dB, 0 to 31dB, 31dB to
0dB, with attenuator A at 0dB

IN1

400kHz offset -73.5

600kHz offset -82.7

1.2MHz offset -85.7

= ZL =

S

= ZL =

S

RF2

=

= P

RF1

IN2

= 940MHz, f

= +5dBm

19 dBm

3.3 dB

44 dBm

±0.002

±0.003

-0.2

+0.4

-0.2

+0.5

-85 dBm

dBc

dB

dB/°C

dB

dB

Switching Speed

From chip select transitioning high to the
output settling to within 1dB of steady state
output

0.3 µs

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, PLO= -6dBm, fLO=

45MHz, f

LBOUT

= fRF- fLO, and TC= +25°C, unless otherwise noted.) (Note 1)

Note 1: All limits include external component losses. Output measurements taken at RFOUT or LBOUT ports of the

Typical

Application Circuit

.

Note 2: Operating outside this range is possible, but with degraded performance of some parameters.
Note 3: Compression point characterized. It is advisable not to continuously operate the VGA RF input above +15dBm.
Note 4: Input RF source contribution to spurious emissions (Agilent ESG 4435B, PSA E4443A): 200kHz = -39.2dBc,

400kHz = -73.5dBc, 600kHz = -83.2dBc, 1.2MHz = -85.7dBc

Note 5: No SPI clock input applied.
Note 6: Guaranteed by design and characterization.

LOOPBACK MIXER

LO Frequency (Note 2) f

LO Input Power P

Output Power (Note 6) PIN = +5dBm, fRF = 940MHz, TC = +25°C -14.7 -12.7 -10.8 dBm

Gain Accuracy

Output Third-Order Intercept
Point (Note 6)

Output Noise Floor PIN = +5dBm -137 dBc/Hz

ON/OFF Switching Time

LBOUT to ATTEN_OUTB Isolation

ATTEN_OUTB to LBOUT Isolation Mixer disabled, PIN = 0dBm 50 dB

Output Return Loss

LO Port Return Loss 50Ω source 32 dB

SERIAL PERIPHERAL INTERFACE (SPI)

Maximum Clock Speed 38 MHz

Data to Clock Setup Time t

Data to Clock Hold Time t
Clock to CS Setup Time t

CS Positive Pulse Width t
CS Negative Pulse Width t

CLOCK Pulse Width t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LO

LO

OIP3

CS

CH

ES

EW

EWN

CW

P

= +5dBm, T

IN

= -40°C to +25°C

Tw o tones: f
P

IN 1

LB_EN enable time 0.12

LB_EN disable time 0.12

Mixer enabled, attenuators A and B both set
to 31dB, P

Mixer enabled, 50Ω load 22

Mixer disabled, 50Ω load 23

R F1

= P

= + 2d Bm , TC = + 25°C

IN 2

= +5dBm

IN

800MHz to 900MHz ±1.7

C

900MHz to 1000MHz ±1.7

= 940M H z, f

= 940.2M H z,

R F2

40 100 MHz

-6 0 dBm

10.6 dBm

67 dB

1ns

9ns

4ns

18 ns

24 ns

13 ns

dB

µs

dB

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

_______________________________________________________________________________________

5

Typical Operating Characteristics

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, fLO= 45MHz, f

LBOUT

=

fRF- fLO, and TC= +25°C, unless otherwise noted.)

GAIN vs. RF FREQUENCY

(MAXIMUM GAIN)

13

12

11

10

GAIN (dB)

TC = +5°C

9

TC = +25°C

8

7

6

700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

TC = -40°C

TC = +85°C

MAX2058 toc01

GAIN (dB)

ATTEN A ABS ACCURACY vs. RF FREQUENCY

1.0

0.5

MAX2058 toc04

GAIN vs. RF FREQUENCY

(MAXIMUM GAIN)

13

12

11

10

9

8

7

6

700 900800 1000 1100 1200

ATTEN A REL ACCURACY vs. RF FREQUENCY

1.0

0.5

VCC = 5.25V

VCC = 5.0V

VCC = 4.75V

RF FREQUENCY (MHz)

MAX2058 toc02

MAX2058 toc05

GAIN vs. RF FREQUENCY

ADJUSTING ATTEN A

15

5

-5

GAIN (dB)

-15

-25
700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

GAIN vs. RF FREQUENCY

ADJUSTING ATTEN B

15

5

MAX2058 toc03

MAX2058 toc06

0

ERROR (dB)

-0.5

-1.0
700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

ATTEN B ABS ACCURACY vs. RF FREQUENCY

1.0

0.5

0

ERROR (dB)

-0.5

-1.0
700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

MAX2058 toc07

0

ERROR (dB)

-0.5

-1.0
700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

ATTEN B REL ACCURACY vs. RF FREQUENCY

1.0

0.5

0

ERROR (dB)

-0.5

-1.0
700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

MAX2058 toc08

-5

GAIN (dB)

-15

-25
700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

OUTPUT IP3 vs. RF FREQUENCY

34

TC = +5°C

33

32

31

OUTPUT IP3 (dBm)

30

29

800 850 900 950 1000

TC = +25°C

RF FREQUENCY (MHz)

TC = -40°C

TC = +85°C

MAX2058 toc09

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, fLO= 45MHz, f

LBOUT

=

fRF- fLO, and TC= +25°C, unless otherwise noted.)

OUTPUT IP3 vs. RF FREQUENCY

34

VCC = 5.25V

33

32

31

OUTPUT IP3 (dBm)

30

29

800 850 900 950 1000

22

21

20

19

(dBm)

1dB

18

17

OUTPUT P

16

15

14

700 800 900 1000 1100 1200

VCC = 5.0V

OUTPUT P

TC = -40°C

TC = +85°C

VCC = 4.75V

RF FREQUENCY (MHz)

vs. RF FREQUENCY

1dB

TC = +5°C

TC = +25°C

RF FREQUENCY (MHz)

NOISE FIGURE vs. RF FREQUENCY

10

9

8

7

6

NOISE FIGURE (dB)

5

4

700 800 900 1000 1100 1200

VCC = 5.0V

VCC = 4.75V

RF FREQUENCY (MHz)

MAX2058 toc10

NOISE FIGURE vs. RF FREQUENCY

10

9

8

7

6

NOISE FIGURE (dB)

5

4

TC = +85°C

TC = +25°C

TC = +5°C

TC = -40°C

700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

MAX2058 toc11

INPUT RETURN LOSS vs. RF FREQUENCY

MAX2058 toc13

OUTPUT P

22

21

VCC = 5.25V

20

19

(dBm)

1dB

18

17

OUTPUT P

16

15

14

VCC = 4.75V

700 800 900 1000 1100 1200

vs. RF FREQUENCY

1dB

VCC = 5.0V

RF FREQUENCY (MHz)

0

MAX2058 toc14

5

10

15

20

INPUT RETURN LOSS (dB)

25

30

ATTEN A VARIED

0dB

16dB, 31dB

700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

2dB

8dB

4dB

1dB

VCC = 5.25V

MAX2058 toc12

MAX2058 toc15

INPUT RETURN LOSS vs. RF FREQUENCY

ATTEN B VARIED

0

5

10

15

20

INPUT RETURN LOSS (dB)

25

30

700 800 900 1000 1100 1200

31dB

0dB, 1dB

RF FREQUENCY (MHz)

MAX2058 toc16

OUTPUT RETURN LOSS vs. RF FREQUENCY

ATTEN A VARIED

0

10

31dB

20

30

OUTPUT RETURN LOSS (dB)

40

700 800 900 1000 1100 1200

0dB

RF FREQUENCY (MHz)

OUTPUT RETURN LOSS vs. RF FREQUENCY

0

MAX2058 toc17

10

20

30

OUTPUT RETURN LOSS (dB)

40

700 800 900 1000 1100 1200

ATTEN B VARIED

4dB

1dB

RF FREQUENCY (MHz)

2dB

0dB

16dB, 31dB

8dB

MAX2058 toc18

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

_______________________________________________________________________________________

7

Typical Operating Characteristics (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, fLO= 45MHz, f

LBOUT

=

fRF- fLO, and TC= +25°C, unless otherwise noted.)

GAIN (dB)

CONVERSION LOSS (dB)

REVERSE GAIN vs. RF FREQUENCY

ADJUSTING ATTEN A AND B

-30

-40
ATTEN A AND B, 0dB

-50

-60

-70

-80

700 800 900 1000 1100 1200

ATTEN A, 31dB

ATTEN B, 31dB

RF FREQUENCY (MHz)

MIXER CONV LOSS vs. RF FREQUENCY

20

19

18

17

16

15

PLO = -6dBm

PLO = -3dBm

PLO = 0dBm

20

19

MAX2058 toc19

18

17

16

CONVERSION LOSS (dB)

15

14

13

12

MAX2058 toc22

11

10

OUTPUT IP3 (dBm)

MIXER CONV LOSS vs. RF FREQUENCY

TC = +85°C

TC = +5°C

800 850 900 950 1000

RF FREQUENCY (MHz)

TC = +25°C

TC = -40°C

MIXER OUTPUT IP3 vs. RF FREQUENCY

TC = +5°C

9

TC = +25°C

8

TC = -40°C

TC = +85°C

20

19

MAX2058 toc20

18

17

16

CONVERSION LOSS (dB)

15

14

13

12

MAX2058 toc23

11

10

OUTPUT IP3 (dBm)

MIXER CONV LOSS vs. RF FREQUENCY

VCC = 4.75V

VCC = 5.0V

800 850 900 950 1000

RF FREQUENCY (MHz)

VCC = 5.25V

MIXER OUTPUT IP3 vs. RF FREQUENCY

VCC = 5.25V

VCC = 4.75V

9

8

VCC = 5.0V

MAX2058 toc21

MAX2058 toc24

14

800 850 900 950 1000

RF FREQUENCY (MHz)

MIXER OUTPUT IP3 vs. RF FREQUENCY

13

12

11

10

9

OUTPUT IP3 (dBm)

8

7

800 850 900 950 1000

PLO = -3dBm, 0dBm

PLO = -6dBm

RF FREQUENCY (MHz)

PLO = 0dBm

7

800 850 900 950 1000

vs. RF FREQUENCY (MIXER ENABLED)

0

MAX2058 toc25

10

20

30

MIXER OUT RETURN LOSS (dB)

40

700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

MIXER OUTPUT RETURN LOSS

TC = +5°C

TC = +85°C

RF FREQUENCY (MHz)

TC = -40°C

TC = +25°C

7

800 850 900 950 1000

vs. RF FREQUENCY (MIXER ENABLED)

0

MAX2058 toc26

10

20

30

MIXER OUT RETURN LOSS (dB)

40

700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

MIXER OUTPUT RETURN LOSS

MAX2058 toc27

VCC = 4.75V, 5.0V, 5.25V

RF FREQUENCY (MHz)

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, fLO= 45MHz, f

LBOUT

=

fRF- fLO, and TC= +25°C, unless otherwise noted.)

MIXER OUTPUT RETURN LOSS

vs. RF FREQUENCY (MIXER DISABLED)

0

MIXER OUTPUT RETURN LOSS

vs. RF FREQUENCY (MIXER DISABLED)

0

LO RETURN LOSS vs. LO FREQUENCY

(MIXER ENABLED)

0

10

TC = +5°C

20

30

MIXER OUT RETURN LOSS (dB)

TC = +85°C

40

700 800 900 1000 1100 1200

RF FREQUENCY (MHz)

LO RETURN LOSS vs. LO FREQUENCY

0

10

20

LO RETURN LOSS (dB)

30

40

0 200

(MIXER ENABLED)

VCC = 4.75V, 5.0V, 5.25V

LO FREQUENCY (MHz)

ATTEN A ONLY

ABS ACCURACY vs. RF FREQUENCY

2.0

1.5

1.0

0.5

0

ERROR (dB)

-0.5

-1.0

-1.5

-2.0

RF FREQUENCY (MHz)

TC = -40°C

TC = +25°C

MAX2058 toc28

10

20

30

MIXER OUT RETURN LOSS (dB)

40

700 800 900 1000 1100 1200

VCC = 4.75V, 5.0V, 5.25V

RF FREQUENCY (MHz)

MAX2058 toc29

10

20

LO RETURN LOSS (dB)

30

40

TC = +85°C

TC = +25°C

TC = -40°C

TC = +5°C

0 50 100 150 200

LO FREQUENCY (MHz)

MAX2058 toc30

ATTEN A ONLY

ATTEN A ONLY

0

MAX2058 toc31

-10

-20

GAIN (dB)

-30

15010050

-40

GAIN vs. RF FREQUENCY

700 1200

RF FREQUENCY (MHz)

1000 1100900800

MAX2058 toc32

-10

-20

GAIN (dB)

-30

-40

GAIN vs. RF FREQUENCY

0

300

(NMT 450MHz BAND)

MAX2058 toc33

500 550350 400 450

RF FREQUENCY (MHz)

ATTEN A ONLY

ABS ACCURACY vs. RF FREQUENCY

2.0

1.5

MAX2058 toc34

1.0

0.5

0

ERROR (dB)

-0.5

-1.0

-1.5

-2.0

11001000900800700

1200

300

(NMT 450MHz BAND)

MAX2058 toc35

550500450400350

RF FREQUENCY (MHz)

REL ACCURACY vs. RF FREQUENCY

1.0

0.5

0

ERROR (dB)

-0.5

-1.0

ATTEN A ONLY

1000900700 800

RF FREQUENCY (MHz)

MAX2058 toc36

12001100

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, fLO= 45MHz, f

LBOUT

=

fRF- fLO, and TC= +25°C, unless otherwise noted.)

ATTEN A ONLY

REL ACCURACY vs. RF FREQUENCY

1.0

0.5

0

ERROR (dB)

-0.5

-1.0

(NMT 450MHz BAND)

RF FREQUENCY (MHz)

2.0

1.5

1.0

0.5

0

ERROR (dB)

-0.5

-1.0

-1.5

-2.0

MAX2058 toc37

-10

-20

GAIN (dB)

-30

500450400350300

550

-40

ATTEN B ONLY

ABS ACCURACY vs. RF FREQUENCY

RF FREQUENCY (MHz)

ATTEN B ONLY

0

GAIN vs. RF FREQUENCY

700 1200

RF FREQUENCY (MHz)

1000 1100900800

ABS ACCURACY vs. RF FREQUENCY

2.0

MAX2058 toc40

11001000900800700

1200

1.5

1.0

0.5

0

ERROR (dB)

-0.5

-1.0

-1.5

-2.0
300

0

MAX2058 toc38

-10

-20

GAIN (dB)

-30

-40
300

ATTEN B ONLY

(NMT 450MHz BAND)

RF FREQUENCY (MHz)

ATTEN B ONLY

GAIN vs. RF FREQUENCY

(NMT 450MHz BAND)

RF FREQUENCY (MHz)

MAX2058 toc41

550500450400350

500 550350 400 450

MAX2058 toc39

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

10 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX2058

Typical Application Circuit

, VCC= +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF≤ 1200MHz,

40MHz ≤ f

LO

≤ 100MHz, TC= -40°C to +85°C. Typical values are at VCC= 5.0V, PIN= 0dBm, fRF= 940MHz, fLO= 45MHz, f

LBOUT

=

f

RF

- fLO, and TC= +25°C, unless otherwise noted.)

ATTEN B ONLY

REL ACCURACY vs. RF FREQUENCY

MAX2058 toc42

RF FREQUENCY (MHz)

ERROR (dB)

1000900700 800

-0.5

0

0.5

1.0

-1.0
12001100

ATTEN B ONLY

REL ACCURACY vs. RF FREQUENCY

(NMT 450MHz BAND)

MAX2058 toc43

RF FREQUENCY (MHz)

ERROR (dB)

500450400350300

-0.5

0

0.5

1.0

-1.0
550

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(MIXER DISABLED)

VCC (V)

SUPPLY CURRENT (mA)

MAX2058 toc44

4.750 4.875 5.000 5.125 5.250

110

120

130

140

150

TC = +25°C

TC = +5°C

TC = -40°C

TC = +85°C

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(MIXER ENABLED)

VCC (V)

SUPPLY CURRENT (mA)

MAX2058 toc45

4.750 4.875 5.000 5.125 5.250

130

140

150

160

170

180

TC = +85°C

TC = +5°C

TC = -40°C

TC = +25°C

MAX2058

Pin Description

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

______________________________________________________________________________________ 11

PIN NAME FUNCTION

1 LO+ Loopback Mixer Local Oscillator Positive Input

2 LO- Loopback Mixer Local Oscillator Negative Input

3 VCCLB

4 LBOUT Loopback Mixer RF Output. Internally matched to 50Ω. AC-couple with a capacitor.

5 LB_EN Loop b ack M i xer Log i c Inp ut. S et to l og i c- l ow 0 to enab l e the m i xer . S et to l og i c- hi g h 1 to d i sab l e the m i xer .

6 DATA SPI Digital Data Input

7 CLK SPI Clock Input
8 CS SPI Chip-Select Input

9 VCCLOGIC

10, 11, 13,
14, 16, 17,
19, 22, 24,
25, 26, 30,
32, 34, 35,

37, 38

12 ATTEN_OUTB Attenuator B Output. Internally matched to 50Ω.

15 V

18 ATTEN_INB Attenuator B Input. Internally matched to 50Ω.

20 RSET2

21 VCCBIAS2

23 AMPOUT RF Amplifier Output. Internally matched to 50Ω.

27 VCCAMP

28 AMPIN RF Amplifier Input. Internally matched to 50Ω.

29 VCCBIAS1

31 RSET1

33 ATTEN_OUTA Attenuator A Output. Internally matched to 50Ω.

36 V

39 ATTEN_INA Attenuator A Input. Internally matched to 50Ω.

40 LBBIAS

EP GND Exposed Ground Paddle. Solder the exposed paddle to GND using multiple vias.

GND Ground

CC

CC

Loopback Mixer Supply Voltage. +5V supply for the internal loopback mixer. Bypass to GND with
100pF and 0.1µF capacitors as close as possible to the pin.

Logic Supply Voltage. +5V supply for the internal logic circuitry. Bypass to GND with 100pF and

0.1µF capacitors as close as possible to the pin.

Attenuator B Supply. +5V supply for attenuator B. Bypass to GND with 100pF and 0.01µF capacitors
as close as possible to the pin.

Output Amplifier Bias-Current-Setting Resistor. Sets the bias current for the output amplifier stage.
Connect a 3.92kΩ resistor to ground.

Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF
and 0.1µF capacitors as close as possible to the pin.

RF Amplifier Supply Voltage. +5V supply for the RF amplifier. Bypass to GND with 1000pF and 0.1µF
capacitors as close as possible to the pin.

Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF
and 0.1µF capacitors as close as possible to the pin.

Input Amplifier Bias-Current-Setting Resistor. Sets the bias current for the input amplifier stage.
Connect a 1.2kΩ resistor to ground.

Attenuator A Supply Voltage. +5V supply for attenuator A. Bypass to GND with 100pF and 0.01µF
capacitors as close as possible to the pin.

Loopback Mixer Bias-Current-Setting Resistor. Sets the bias current for the mixer. Connect a 2kΩ
resistor to ground.

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

12 ______________________________________________________________________________________

Detailed Description

The MAX2058 high-linearity DVGA consists of two 5-bit,
31dB digital attenuators, a fixed-gain two-stage driver
amplifier, a loopback mixer, and a serial interface to
control the attenuators. This high level of component
integration makes the MAX2058 ideal for base-station
transmitter applications. The MAX2058 is designed to
operate in the 700MHz to 1200MHz frequency ranges.
The overall cascaded performance of the MAX2058
produces a typical 10.5dB gain, a +32.3dBm OIP3, a
19dBm OP1dB, and a total 62dB gain-control range.

5-Bit Attenuators

The MAX2058 integrates two 5-bit digital attenuators to
achieve a high dynamic range. Each attenuator has a
31dB control range, a 1dB step size, and is pro­grammed with the 3-wire SPI. See the

Applications

Information

section and Table 1 for attenuator program­ming details. The attenuators can be used for both stat­ic and dynamic power control.

Driver Amplifier

The MAX2058 includes a two-stage medium power
amplifier with a fixed 17.5dB gain. The driver amplifier
circuit is optimized for high linearity and medium output
power capability for the 800MHz to 1000MHz frequen­cy range. The driver amplifier is intended to amplify a
modulated signal and drive a high-power amplifier in
base-station transmitters. In a typical application, the
driver amplifier is cascaded in between the two digital
attenuators. See the

Typical Application Circuit.

The two-stage amplifier stage can be disabled for
applications where only the digital attenuators and/or
loopback mixer are used. To disable the two-stage
amplifier, ground or leave unconnected the amplifier
supplies VCCBIAS2, VCCAMP, VCCBIAS1, and also
the inputs for setting the amplifier bias currents RSET1,
RSET2. This reduces the supply current by approxi­mately 132mA under typical conditions.

Loopback Mixer

The MAX2058 loopback mixer uses a double-balanced
active architecture designed to operate with a 700MHz
to 1200MHz RF frequency range, and a 40MHz to
100MHz LO frequency range. The RF port of the mixer is
connected internally (with an on-chip switch) to the input
of the first attenuator stage. The mixer’s IF port is
matched for a single-ended 50Ω impedance, while the
LO port requires a differential input impedance of 100Ω.

The loopback mixer facilitates a self-diagnostic mode
for cellular transceivers, whereby the Tx band signal at
the input of the mixer can be translated up or down to
the corresponding Rx band. This translated signal can
then be fed back to the radio’s receiver for complete
Tx/Rx loop diagnostics. The loopback mixer is enabled
and disabled with LB_EN. Set LB_EN to a logic-low 0 to
enable the mixer, set LB_EN to a logic-high 1 to disable
the mixer.

Applications Information

SPI Interface and Attenuator Settings

The two 5-bit attenuators are programmed with the 3­wire SPI/MICROWIRE-compatible serial interface using
10-bit words. Bit 9 of the 10-bit data is shifted in first,
along with all remaining data bits, on the rising edge of
the clock regardless of CS being high or low. Once all
the data bits are shifted in, all will be sent to the attenua­tors on the rising edge of CS, thus changing the attenua­tion state. For standard SPI operation, pull CS low for the
duration of a valid 10-bit data set (t

EWN

). This CS nega-

tive pulse width includes the setup time of the rising
clock edge to CS transitioning high (tES). See Figure 1.

Table 1. Attenuator Programming

Figure 1. SPI Timing Diagram

ATTENUATOR A (5 MSBs) ATTENUATOR B (5 LSBs)

Bit 9 = 16dB step Bit 4 = 16dB step

Bit 8 = 8dB step Bit 3 = 8dB step

Bit 7 = 4dB step Bit 2 = 4dB step

Bit 6 = 2dB step Bit 1 = 2dB step

Bit 5 = 1dB step Bit 0 = 1dB step

MSBDATA

BIT 9 BIT 8 BIT 1 BIT 0 LSB

CLOCK

CS

NOTES:
DATA ENTERED ON CLOCK RISING EDGE.
ATTENUATOR STATE CHANGE ON CS RISING EDGE.

t

CS

t

t

CH

CW

t

EWN

t

ES

t

EW

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

______________________________________________________________________________________ 13

Figure 2. Direct Conversion Transmitter for GSM/EDGE Basestations

The 5 MSBs of the 10-bit word program attenuator A,
and the 5 LSBs of the 10-bit word program attenuator
B. Each bit sets the attenuators to a corresponding
attenuation level. For example, logic-low 0 for bit 5 and
bit 0 of attenuator A and B, respectively, sets both
attenuators at 1dB. 00000 configures both attenuators
for 31dB attenuation and 11111 sets for 0dB attenua­tion. See Table 1 for programming details.

External Bias

Bias currents for the two-stage amplifier and the loop­back mixer are set and optimized with external resistors.
Resistor R1 (pin 31) sets the bias current for the input
amplifier, R2 (pin 20) sets the bias current for the output
amplifier, and R3 (pin 40) sets the bias for the loopback
mixer. The external biasing resistor values can be
increased for reduced current operation at the expense
of performance. Contact the factory for details.

Board Layout

The pin configuration of the MAX2058 has been opti­mized to facilitate a very compact physical layout of the
device and its associated discrete components.

The exposed paddle (EP) of the MAX2058’s thin QFN­EP package provides a low thermal-resistance path to
the die. It is important that the PC board on which the
MAX2058 is mounted be designed to conduct heat

from the EP. In addition, provide the EP with a low­inductance path to electrical ground. The EP MUST be
soldered to a ground plane on the PC board, either
directly or through an array of plated via holes.

Table 2. Component List Referring to the
Typical Application Circuit

COMPONENT VALUE DESCRIPTION

C1, C4, C10, C13,

C16

C2, C5, C8, C17 100pF Microwave capacitors (0402)

C3, C6, C14, C19 47pF Microwave capacitors (0402)

C7, C18 0.01µF Microwave capacitors (0402)

C9, C12, C15 1000pF Microwave capacitors (0402)

C11 3.9pF Microwave capacitor (0402)

R1 1.2kΩ

R2 3.92kΩ

R3 2.0kΩ ±1% resistor (0402)

R4 110Ω ±1% resistor (0402)

T1 2:1

U1 —

0.1µF Microwave capacitors (0603)

±1% resistor (0402)

±1% resistor (0402)

RF transformer (100:50)
Mini-Circuits TC2-1T

MAX2058 MAXIM IC

MAX2021/MAX2022/MAX2023*

MAX5873 MAX4395

DUAL DAC QUAD AMP

I

12

Q

12

*FUTURE PRODUCTS—CONTACT FACTORY FOR SAMPLES

ZERO-IF

MODS/DEMODS

0°

90°

∑

MAX9491*

VCO + PLL

45, 80,

OR

95MHz

LO

MAX2058/MAX2059*

RF DIGITAL VGAs

17.5dB31dB

LOOPBACK

OUT

(FEEDS BACK

INTO Rx CHAIN

FRONT-END)

Rx

OFF

31dB

RF OUT

SPI

LOGIC

SPI

CONTROL

MAX2058

700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer

14 ______________________________________________________________________________________

Typical Application Circuit

Direct-Conversion Base-Station

Transmitter

The MAX2058/MAX2059 are designed to interface
directly with Maxim’s direct-conversion quadrature
modulators and high-speed DACs to provide a com­plete solution for GSM/EDGE base-station transmitter
applications. See Figure 2. The MAX2058/MAX2059,

together with the MAX2021/MAX2022/MAX2023* direct­conversion modulators/demodulators, the MAX5873
dual-channel DAC, and the MAX4395 quad amplifier,
form an ideal total transmitter lineup. This overall sys­tem is highly efficient and low cost, while maintaining
high linearity and low noise performance.

RF INPUT

C19

R3

ATTN_INA

LBBIAS

40 39 38 37

1

2

3

4

5

6

7

8

9

10

GND

C6

SPI

ATTEN_OUTB

LO INPUT

LBOUT

T1

V

CC

C1 C2

V

CC

C4 C5

R4

C3

LO+

LO-

VCCLB

LBOUT

LB_EN

DATA

CLK

CS

VCCLOGIC

GND

RF OUTPUT

GND

GND

5-BIT ATTENUATOR

5-BIT ATTENUATOR

GND

GND

V

CC

C17 C18

R1

CC

V

GND

GND

36 35 34 33 32 31

A

MAX2058

DRIVER AMP

B

15 16 17 18 19 2011 12 13 14

CC

V

GND

GND

C8

C7

GND

ATTEN_OUTA

GND

ATTEN_INB

E.P.

RSET1

RSET2

30

29

28

27

26

25

24

23

22

21

R2

GND

VCCBIAS1

AMPIN

VCCAMP

GND

GND

GND

AMPOUT

GND

VCCBIAS2

C9

C14

C13C12

C10

C11

V

CC

C16C15

V

CC

V

CC

MAX2058

700MHz to 1200MHz High-Linearity,

SPI-Controlled DVGA with Integrated Loopback Mixer

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 ____________________

15

© 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Package Information

For the latest package outline information, go to

www.maxim-ic.com/packages

.

MAX2058

30

29

28

27

26

36 35 34 33 32 31

40 39 38 37

15 16 17 18 19 2011 12 13 14

25

23

21

24

22

5

4

3

2

9

8

10

7

6

1

DRIVER AMP

5-BIT ATTENUATOR

B

SPI

5-BIT ATTENUATOR

A

GND

GND

GND

GND

GND

AMPOUT

V

CC

GND

GND

GND

GND

GND

RSET1

ATTEN_OUTB

ATTEN_INB

ATTEN_INA

ATTEN_OUTA

LBBIAS

LO+

LO-

VCCLB

VCCLOGIC

VCCBIAS2

LBOUT

LB_EN

DATA

CLK

CS

GND

GND

GND

RSET2

GND

GND

GND

GND

V

CC

VCCAMP

AMPIN

VCCBIAS1

Pin Configuration/Functional Diagram

Chip Information

PROCESS: SiGe BiCMOS