MAXIM MAX2065 Technical data

General Description

The MAX2065 high-linearity, analog/digital variable­gain amplifier (VGA) is designed to operate in the
50MHz to 1000MHz frequency range with two indepen­dent attenuators (see the

Typical Application Circuit

).
The digital attenuator is controlled as a slave peripheral
using either the SPI™-compatible interface or a parallel
bus with 31dB total adjustment range in 1dB steps. An
added feature allows “rapid-fire” gain selection
between each of four steps, preprogrammed by the
user through the SPI-compatible interface. The 2-pin
control allows the user to quickly access any one of
four customized attenuation states without reprogram­ming the SPI bus. The analog attenuator is controlled
using an external voltage or through the SPI-compatible
interface using an on-chip 8-bit DAC.

Because each of the three stages has its own RF input
and RF output, this component can be configured to
either optimize NF (amplifier configured first), OIP3 (ampli­fier last), or a compromise of NF and OIP3. The device’s
performance features include 22dB amplifier gain (ampli­fier only), 6.5dB NF at maximum gain (includes attenuator
insertion losses), and a high OIP3 level of +42dBm. Each
of these features makes the MAX2065 an ideal VGA for
numerous receiver and transmitter applications.

In addition, the MAX2065 operates from a single +5V
supply with full performance, or a single +3.3V supply
with slightly reduced performance, and has an
adjustable bias to trade current consumption for linearity
performance. This device is available in a compact 40­pin thin QFN package (6mm x 6mm) with an exposed
pad. Electrical performance is guaranteed over the
extended temperature range (TC= -40°C to +85°C).

Applications

IF and RF Gain Stages
Temperature Compensation Circuits
Cellular Band WCDMA and cdma2000®Base

Stations
GSM 850/GSM 900 EDGE Base Stations
WiMAX and LTE Base Stations and Customer

Premise Equipment
Fixed Broadband Wireless Access
Wireless Local Loop
Military Systems
Video-on-Demand (VOD) and DOCSIS®-

Compliant EDGE QAM Modulation
Cable Modem Termination Systems (CMTS)

Features

♦ 50MHz to 1000MHz RF Frequency Range

♦ Pin-Compatible Family Includes:

MAX2066 (Digital VGA)
MAX2067 (Analog VGA)

♦ +19.4dB (Typ) Maximum Gain

♦ 0.5dB Gain Flatness Over 100MHz Bandwidth

♦ 62dB Gain Range (31dB Analog + 31dB Digital)

♦ Built-in DAC for Analog Attenuation Control

♦ Supports Four “Rapid-Fire” Preprogrammed

Attenuator States

Quickly Access Any One of Four Customized

Attenuation States Without Reprogramming

the SPI Bus
Ideal for Fast-Attack, High-Level Blocker Protection
Prevents ADC Overdrive Condition

♦ Excellent Linearity (Configured with Amplifier

Last)

+42dBm OIP3
+63dBm OIP2
+19dBm Output 1dB Compression Point

-67dBc HD2

-83dBc HD3

♦ 6.5dB Typical Noise Figure (NF)

♦ Fast, 25ns Digital Switching

♦ Very Low Digital VGA Amplitude Overshoot/

Undershoot

♦ Single +5V Supply (Optional +3.3V Operation)

♦ External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/
Reduced-Performance Mode

MAX2065

50MHz to 1000MHz High-Linearity, Serial/

Parallel-Controlled Analog/Digital VGA

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-3131; Rev 0; 3/08

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.

+

Denotes a lead-free package.

*

EP = Exposed pad.

T = Tape and reel.

cdma2000 is a registered trademark of Telecommunications
Industry Association.

DOCSIS and CableLabs are registered trademarks of Cable
Television Laboratories, Inc. (CableLabs®).

SPI is a trademark of Motorola, Inc.

Pin Configuration appears at end of data sheet.

PART TEMP RANGE

MAX2065ETL+ -40°C to +85°C 40 Thin QFN-EP* T4066-3

M AX 2065E TL+ T -40°C to +85°C 40 Thin QFN-EP* T4066-3

PIN­PACKAGE

PKG

CODE

MAX2065

50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

+3.3V SUPPLY DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, high-current (HC) mode, VCC= +3.0V to +3.6V, TC= -40°C to +85°C. Typical values are at VCC= +3.3V

and T

C

= +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.

Note 1: Based on junction temperature TJ= TC+ (θJCx VCCx ICC). This formula can be used when the temperature of the exposed

pad is known while the device is soldered down to a printed-circuit board (PCB). See the

Applications Information

section

for details. The junction temperature must not exceed +150°C.

Note 2: Junction temperature T

J

= TA+ (θJAx VCCx ICC). This formula can be used when the ambient temperature of the PCB is

known. The junction temperature must not exceed +150°C.

Note 3: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

.

Note 4: T

C

is the temperature on the exposed pad of the package. TAis the ambient temperature of the device and PCB.

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

VDD_LOGIC, DATA, CS, CLK, SER/PAR, VDAC_EN,

VREF_SELECT.....................................-0.3V to (VCC_ + 0.3V)

STATE_A, STATE_B, D0–D4 ....................-0.3V to (VCC_ + 0.3V)

AMP_IN, AMP_OUT, VREF_IN,

ANALOG_VCTRL ................................-0.3V to (VCC_ + 0.3V)

ATTEN1_IN, ATTEN1_OUT, ATTEN2_IN,

ATTEN2_OUT...................................................-1.2V to + 1.2V

RSET to GND........................................................-0.3V to + 1.2V

RF Input Power (ATTEN1_IN, ATTEN1_OUT,

ATTEN2_IN, ATTEN2_OUT).......................................+20dBm

RF Input Power (AMP_IN)...............................................+18dBm

Continuous Power Dissipation (Note 1) ...............................6.5W

θ

JA

(Notes 2, 3)..............................................................+38°C/W

θ

JC

(Note 3) ...................................................................+10°C/W

Operating Temperature Range (Note 4).....T

C

= -40°C to +85°C

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

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

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

+5V SUPPLY DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= +4.75V to +5.25V, TC= -40°C to +85°C. Typical values are at VCC= +5V and

T

C

= +25°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I
LOGIC INPUTS (DATA, CS, CLK, VDAC_EN, VREF_SELECT, SER/PAR, STATE_A, STATE_B, D0–D4)

Input High Voltage V

Input Low Voltage V

CC

CC

IH

IL

3.0 3.3 3.6 V

Supply Voltage V

Supply Current I

LOGIC INPUTS (DATA, CS, CLK, VDAC_EN, VREF_SELECT, SER/PAR, STATE_A, STATE_B, D0–D4)

Input High Voltage V

Input Low Voltage V

Input Current Logic-High I

Input Current Logic-Low I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

CC

IH

IH

IL

Low-current (LC) mode 73 93

High-current (HC) mode 124 146

IL

4.75 5 5.25 V

3V

-1 +1 µA

-1 +1 µA

60 80 mA

2V

0.8 V

mA

0.8 V

MAX2065

50MHz to 1000MHz High-Linearity, Serial/

Parallel-Controlled Analog/Digital VGA

_______________________________________________________________________________________ 3

+5V SUPPLY AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= +4.75 to +5.25V, HC mode with each attenuator set for maximum gain, 50MHz ≤ fRF≤ 1000MHz,

T

C

= -40°C to +85°C. Typical values are at VCC= +5.0V, HC mode, PIN= -20dBm, fRF= 200MHz, and TC= +25oC, unless otherwise

noted.) (Note 5)

+3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= +3.0V to +3.6V, TC= -40°C to +85°C. Typical values are at VCC= +3.3V, HC mode with attenua-

tors set for maximum gain, P

IN

= -20dBm, fRF= 200MHz, and TC= +25oC, unless otherwise noted.) (Note 5)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF Frequency Range f

Small Signal Gain G 18.8 dB

Output Third-Order Intercept
Point

Noise Figure NF Maximum gain setting 6.7 dB

Total Attenuation Range Analog and digital combined 61.5 dB

RF

OIP3 P

(Notes 6, 7) 50 1000 MHz

= 0dBm/tone, maximum gain setting 37.5 dBm

OUT

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF Frequency Range f

Small Signal Gain G

Gain Variation vs. Temperature -0.006 dB/°C

Gain Flatness vs. Frequency

Noise Figure NF

Total Attenuation Range Analog and digital combined 61.5 dB

Output Second-Order Intercept
Point

Output Third-Order Intercept
Point

RF

OIP2 P

OIP3

(Notes 6, 7) 50 1000 MHz

200MHz 19.4

350MHz, TC = +25°C 17.5 18.7 19.7

450MHz 18.2

750MHz 16.4

900MHz 15.6

Any 100MHz frequency band from 50MHz
to 500MHz

200MHz 6.5

350MHz, TC = +25°C (Note 7) 6.8 8

450MHz 7

750MHz 7.8

900MHz 8.2

= 0dBm/tone, Δf = 1MHz, f1 + f

OUT

P

= 0dBm/tone,

OUT

H C m od e, Δ f = 1M H z

P

= 0dBm/tone,

OUT

LC mode, Δf = 1MHz

200MHz 42

350MHz 40

450MHz 39

750MHz 36

900MHz 35

200MHz 40

350MHz 38

450MHz 37

750MHz 35

900MHz 33

2

0.5 dB

63 dBm

dB

dB

dBm

MAX2065

50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA

4 _______________________________________________________________________________________

+5V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, VCC= +4.75 to +5.25V, HC mode with each attenuator set for maximum gain, 50MHz ≤ fRF≤ 1000MHz,

T

C

= -40°C to +85°C. Typical values are at VCC= +5.0V, HC mode, PIN= -20dBm, fRF= 200MHz, and TC= +25oC, unless otherwise

noted.) (Note 5)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output -1dB Compression Point P

Second Harmonic

Third Harmonic

Input Return Loss 50Ω source, maximum gain setting 18 dB

Output Return Loss 50Ω load, maximum gain setting 18 dB

DIGITAL ATTENUATOR

Insertion Loss 2.5 dB

Input Second-Order Intercept
Point

Input Third-Order Intercept Point IIP3 P

Attenuation Range 31.2 dB

Step Size 1dB

Relative Step Accuracy 0.2 dB

Absolute Step Accuracy 0.45 dB

Amplitude Overshoot/Undershoot

Switching Speed

Input Return Loss 50Ω source 19 dB

Output Return Loss 50Ω load 19 dB

ANALOG ATTENUATOR

Insertion Loss 1.2 dB

Input Second-Order Intercept
Point

Input Third-Order Intercept Point IIP3

Attenuation Range Analog control input 31.1 dB

Gain Control Slope Analog control input -12.5 dB/V

Maximum Gain Control Slope Over analog control input range -35 dB/V

Insertion Phase Change Over analog control input range 18 D eg r ees

Group Delay Maximum gain setting 0.98 ns

Group Delay vs. Control Voltage Over analog control input range -0.25 ns

Analog Control Input Range 0.25 2.75 V

1dB

IIP2

IIP2

350MHz, TC = +25°C (Note 8) 17 18.7 dBm

P

= +3dBm, fRF = 200MHz, TC = +25°C

OUT

(Note 7)

P

= +3dBm, fRF = 200MHz, TC = +25°C

OUT

(Note 7)

P

= 0dBm, P

RF1

+ f

f

1

2

= 0dBm, P

RF1

Between any two
states

RF settled to within
±0.1dB

P

= 0dBm, P

RF1

setting, Δf = 1MHz, f

P

= 0dBm, P

RF1

setting, Δf = 1MHz

= 0dBm, Δf = 1MHz,

RF2

= 0dBm, Δf = 1MHz 41 dBm

RF2

0dB to 16dB 4.8

24dB 8Insertion Phase Step fRF = 170MHz

31dB 10.8

ET = 15ns 1.0

ET = 40ns 0.05

31dB to 0dB 25

0dB to 31dB 21

= 0dBm, maximum gain

RF2

+ f

1

2

= 0dBm, maximum gain

RF2

-60 -67 dBc

-71 -83 dBc

52 dBm

D eg r ees

dB

ns

70 dBm

36 dBm

MAX2065

50MHz to 1000MHz High-Linearity, Serial/

Parallel-Controlled Analog/Digital VGA

_______________________________________________________________________________________ 5

+5V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, VCC= +4.75 to +5.25V, HC mode with each attenuator set for maximum gain, 50MHz ≤ fRF≤ 1000MHz,

T

C

= -40°C to +85°C. Typical values are at VCC= +5.0V, HC mode, PIN= -20dBm, fRF= 200MHz, and TC= +25oC, unless otherwise

noted.) (Note 5)

Note 5: All limits include external component losses. Output measurements are performed at RF output port of the

Typical

Application Circuit

.

Note 6: Operating outside this range is possible, but with degraded performance of some parameters.
Note 7: Guaranteed by design and characterization.
Note 8: It is advisable not to operate continuously the VGA RF input above +15dBm.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Analog Control Input Impedance 80 kΩ

Input Return Loss 50Ω source 22 dB

Output Return Loss 50Ω load 22 dB

D/A CONVERTER

Number of Bits 8 Bits

Output Voltage

SERIAL PERIPHERAL INTERFACE (SPI)

Maximum Clock Speed f

Data-to-Clock Setup Time t

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

CS Positive Pulse Width t
CS Setup Time t

Clock Pulse Width t

DAC code = 00000000 0.25

DAC code = 11111111 2.75

CLK

CS

CH

ES

EW

EWS

CW

20 MHz

2ns

2.5 ns

3ns

7ns

3.5 ns

5ns

V

MAX2065

50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA

6 _______________________________________________________________________________________

Typical Operating Characteristics

(VCC= +5.0V, HC mode, both attenuators set for maximum gain, PIN= -20dBm, fRF= 200MHz, and TC= +25°C, internal DAC refer­ence used, unless otherwise noted.)

150

SUPPLY CURRENT vs. V

140

130

120

SUPPLY CURRENT (mA)

110

100

4.750 5.250

TC = +25°C

TC = -40°C

TC = +85°C

VCC (V)

CC

5.1255.0004.875

MAX2065 toc01

22

21

20

19

18

GAIN (dB)

17

16

15

14

GAIN vs. RF FREQUENCY

TC = -40°C

TC = +25°C

TC = +85°C

50 1050

RF FREQUENCY (MHz)

850450 650250

MAX2065 toc02

22

21

20

19

18

GAIN (dB)

17

16

15

14

GAIN vs. RF FREQUENCY

VCC = 5.25V

VCC = 5.00V

VCC = 4.75V

50 1050

RF FREQUENCY (MHz)

MAX2065 toc03

850450 650250

GAIN OVER DIGITAL ATTENUATOR

SETTING vs. RF FREQUENCY

22

12

2

GAIN (dB)

-8

-18
50 1050

RF FREQUENCY (MHz)

INPUT MATCH OVER DIGITAL ATTENUATOR

SETTING vs. RF FREQUENCY

0

-5
16dB

-10

-15

INPUT MATCH (dB)

-20

-25

-30
0 1000

0dB, 8dB

4dB

31dB

RF FREQUENCY (MHz)

1dB, 2dB

DIGITAL ATTENUATOR RELATIVE

ERROR vs. RF FREQUENCY

1.00

0.75

MAX2065 toc04

0.50

0.25

0

-0.25

RELATIVE ERROR (dB)

-0.50

-0.75

-1.00

850450 650250

50 1050

RF FREQUENCY (MHz)

850450 650250

MAX2065 toc05

OUTPUT MATCH OVER DIGITAL ATTENUATOR

SETTING vs. RF FREQUENCY

0

-5

MAX2065 toc07

-10

-15

-20

OUTPUT MATCH (dB)

-25

800400 600200

-30
0 1000

0dB, 1dB, 2dB, 4dB

8dB

16dB, 31dB

800400 600200

RF FREQUENCY (MHz)

MAX2065 toc08

DIGITAL ATTENUATOR ABSOLUTE

ERROR vs. RF FREQUENCY

1.00

0.75

0.50

0.25
0

-0.25

-0.50

-0.75

-1.00

ABSOLUTE ERROR (dB)

-1.25

-1.50

-1.70

-2.00
50 1050

RF FREQUENCY (MHz)

REVERSE ISOLATION OVER DIGITAL

ATTENUATOR SETTING vs. RF FREQUENCY

-30

-40

DIGITAL ATTENUATOR 0dB

-50

REVERSE ISOLATION (dB)

-60

-70

DIGITAL ATTENUATOR 31dB

50 1050

RF FREQUENCY (MHz)

MAX2065 toc06

850450 650250

MAX2065 toc09

850450 650250

MAX2065

50MHz to 1000MHz High-Linearity, Serial/

Parallel-Controlled Analog/Digital VGA

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(VCC= +5.0V, HC mode, both attenuators set for maximum gain, PIN= -20dBm, fRF= 200MHz, and TC= +25°C, internal DAC refer­ence used, unless otherwise noted.)

S21 PHASE CHANGE OVER DIGITAL

ATTENUATOR SETTING vs. RF FREQUENCY

60

50

40

30

20

10

S21 PHASE CHANGE (DEG)

0

REFERENCED TO HIGH GAIN STATE

POSITIVE PHASE = ELECTRICALLY SHORTER

-10
50 1050

RF FREQUENCY (MHz)

GAIN vs. ANALOG ATTENUATOR SETTING

22

17

12

7

2

GAIN (dB)

-3

-8

-13

-18

TC = -40°C, +25°C, +85°C

0 256

DAC CODE

RF = 200MHz

12864 96 224160 19232

MAX2065 toc10

850450 650250

MAX2065 toc13

GAIN OVER ANALOG ATTENUATOR

SETTING vs. RF FREQUENCY

22

17

12

DAC CODE 32

7

2

GAIN (dB)

-3
DAC CODE 128

-8

-13

-18
50 1050

RF FREQUENCY (MHz)

DAC CODE 0

DAC CODE 64

DAC CODE 256

GAIN vs. ANALOG ATTENUATOR SETTING

22

17

12

7

2

GAIN (dB)

-3

-8

-13

-18

0 256

VCC = 4.75V, 5.00V, 5.25V

12864 96 224160 19232

DAC CODE

850450 650250

RF = 200MHz

MAX2065 toc11

GAIN (dB)

MAX2065 toc14

INPUT MATCH (dB)

GAIN vs. ANALOG ATTENUATOR SETTING

22

17

12

7

2

1000MHz

-3

-8

-13

-18
0 256

50MHz

200MHz

450MHz

12864 96 224160 19232

DAC CODE

INPUT MATCH

vs. ANALOG ATTENUATOR SETTING

0

-5

-10

-15

-20

-25

-30
0 256

50MHz

1000MHz

200MHz

12864 96 224160 19232

DAC CODE

450MHz

MAX2065 toc12

MAX2065 toc15

OUTPUT MATCH

vs. ANALOG ATTENUATOR SETTING

0

-5
450MHz

-10

-15

-20

OUTPUT MATCH (dB)

50MHz

-25

-30
0 256

1000MHz

200MHz

12864 96 224160 19232

DAC CODE

ATTENUATOR SETTING vs. RF FREQUENCY

-30

MAX2065 toc16

-40

-50

REVERSE ISOLATION (dB)

-60

-70

REVERSE ISOLATION OVER ANALOG

DAC CODE 0

DAC CODE 255

250 450 650 850

50 1050

RF FREQUENCY (MHz)

80

70

MAX2065 toc17

60

50

40

30

20

S21 PHASE CHANGE (DEG)

10

0

-10
0 258

S21 PHASE CHANGE

vs. ANALOG ATTENUATOR SETTING

REFERENCED TO HIGH GAIN STATE

POSITIVE PHASE = ELECTRICALLY SHORTER

1000MHz

32 64 96 128 160 224192

DAC CODE

450MHz

200MHz

50MHz

MAX2065 toc18

MAX2065

50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= +5.0V, HC mode, both attenuators set for maximum gain, PIN= -20dBm, fRF= 200MHz, and TC= +25°C, internal DAC refer­ence used, unless otherwise noted.)

NOISE FIGURE vs. RF FREQUENCY

MAX2065 toc19

RF FREQUENCY (MHz)

NOISE FIGURE (dB)

250 450 650 850

11

4

8

6

10

9

7

5

50 1050

TC = +85°C

TC = +25°C

TC = -40°C

NOISE FIGURE vs. RF FREQUENCY

MAX2065 toc20

RF FREQUENCY (MHz)

NOISE FIGURE (dB)

250 450 650 850

11

4

8

6

10

9

7

5

50 1050

VCC = 5.25V

VCC = 4.75V

VCC = 5.00V

OUTPUT P1dB vs. RF FREQUENCY

MAX2065 toc21

RF FREQUENCY (MHz)

OUTPUT P1dB (dBm)

250 450 650 850

21

15

17

20

19

18

16

50 1050

TC = -40°C

TC = +25°C

TC = +85°C

OUTPUT P1dB vs. RF FREQUENCY

MAX2065 toc22

RF FREQUENCY (MHz)

OUTPUT P1dB (dBm)

250 450 650 850

21

15

17

20

19

18

16

50 1050

VCC = 4.75V

VCC = 5.00V

VCC = 5.25V

OUTPUT IP3 vs. RF FREQUENCY

MAX2065 toc23

RF FREQUENCY (MHz)

OUTPUT IP3 (dBm)

250 450 650 850

50

30

45

40

35

50 1050

TC = -40°C

TC = +25°C

TC = +85°C

P

OUT

= 0dBm/TONE

OUTPUT IP3 vs. RF FREQUENCY

MAX2065 toc24

RF FREQUENCY (MHz)

OUTPUT IP3 (dBm)

250 450 650 850

50

30

45

40

35

50 1050

VCC = 4.75V

VCC = 5.25V

VCC = 5.00V

P

OUT

= 0dBm/TONE

OUTPUT IP3

vs. DIGITAL ATTENUATOR STATE

MAX2065 toc25

DIGITAL ATTENUATOR STATE (dB)

OUTPUT IP3 (dBm)

4 8 12 16 20 24 28

42

38

41

40

39

032

TC = +25°C LSB, USB

TC = +85°C LSB, USB

TC = -40°C LSB, USB

P

OUT

= -3dBm/TONE

RF = 200MHz

OUTPUT IP3

vs. ANALOG ATTENUATOR STATE

MAX2065 toc26

DAC CODE

OUTPUT IP3 (dBm)

32 64 96 128 160 192 224

45

25

40

35

30

0 256

TC = -40°C, +25°C, +85°C TONE = LSB, USB

P

OUT

= -3dBm/TONE

RF = 200MHz

2nd HARMONIC vs. RF FREQUENCY

MAX2065 toc27

RF FREQUENCY (MHz)

2nd HARMONIC (dBc)

250 450 650 850

80

40

70

60

50

50 1050

P

OUT

= 3dBm

TC = -40°C

TC = +25°C

TC = +85°C

MAX2065

50MHz to 1000MHz High-Linearity, Serial/

Parallel-Controlled Analog/Digital VGA

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(VCC= +5.0V, HC mode, both attenuators set for maximum gain, PIN= -20dBm, fRF= 200MHz, and TC= +25°C, internal DAC refer­ence used, unless otherwise noted.)

2nd HARMONIC

vs. ANALOG ATTENUATOR STATE

P

= 0dBm

OUT

RF = 200MHz

TC = +25°C

TC = +85°C

32 64 96 128 160 192 224

TC = -40°C

DAC CODE

3rd HARMONIC

vs. DIGITAL ATTENUATOR STATE

P

= 0dBm

OUT

TC = +25°C

TC = +85°C

TC = -40°C

RF = 200MHz

2nd HARMONIC vs. RF FREQUENCY

80

VCC = 5.25V

70

60

2nd HARMONIC (dBc)

50

40

VCC = 4.75V

250 450 650 850

50 1050

RF FREQUENCY (MHz)

VCC = 5.00V

3rd HARMONIC vs. RF FREQUENCY

110

100

90

80

3rd HARMONIC (dBc)

70

TC = +85°C

TC = +25°C

TC = -40°C

2nd HARMONIC

vs. DIGITAL ATTENUATOR STATE

MAX2065 toc28

2nd HARMONIC (dBc)

80

TC = -40°C

75

70

TC = +85°C

65

60

4 8 12 16 20 24 28

032

DIGITAL ATTENUATOR STATE (dB)

TC = +25°C

P

= 3dBm

OUT

P

= 0dBm

OUT

RF = 200MHz

MAX2065 toc29

2nd HARMONIC (dBc)

80

75

70

65

60

0 256

3rd HARMONIC vs. RF FREQUENCY

100

MAX2065 toc32

3rd HARMONIC (dBc)

95

90

85

80

75

MAX2065 toc31

3rd HARMONIC (dBc)

110

100

P

= 3dBm

OUT

VCC = 5.25V

VCC = 5.00V

90

80

70

VCC = 4.75V

P

= 3dBm

OUT

MAX2065 toc30

MAX2065 toc33

60

50 1050

250 450 650 850

RF FREQUENCY (MHz)

3rd HARMONIC

vs. ANALOG ATTENUATOR STATE

100

95

90

85

80

3rd HARMONIC (dBc)

75

70

TC = +25°C

TC = +85°C

TC = -40°C

32 64 96 128 160 192 224 256

0

DAC CODE

P

= 0dBm

OUT

RF = 200MHz

MAX2065 toc34

60

50 1050

250 450 650 850

RF FREQUENCY (MHz)

OIP2 vs. RF FREQUENCY

75

70

65

60

55

OIP2 (dBm)

50

45

40

50

TC = -40°C

TC = +25°C

250 450 650 850 1050

RF FREQUENCY (MHz)

P

OUT

TC = +85°C

= 0dBm/TONE

MAX2065 toc35

70

4 8 12 16 20 24 28 32

0

DIGITAL ATTENUATOR STATE (dB)

OIP2 vs. RF FREQUENCY

75

70

65

60

55

OIP2 (dBm)

50

45

40

VCC = 4.75V

50 1050

250 450 650 850

RF FREQUENCY (MHz)

VCC = 5.00V

P

OUT

VCC = 5.25V

= 0dBm/TONE

MAX2065 toc36