DR65-0002-TR - M/A-COM Technology Solutions, Inc.

• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400

• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588

Visit www.macomtech.com for additional data sheets and prod uct information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

Linear Driver for

PIN Diode Attenuators

Rev. V5

DR65-0002

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Features

• Linearizes PIN Diode Attenuators Ove r a Wide

Attenuation Range

• Output Currents up to 12 mA

• Operates with a Single Supply Voltage of +3V to

+12V

• Low Quiescent Currents

• Single Control Voltage

• Test Boards are Available

• Tape and Reel Packaging Available

• SOW-16 Package

Description

M/A-COM's DR65-0002 is a break point free driver

that produces a logarithmic output current suitable

for linearizing PIN diode based shunt attenuators.

This driver, in conjunction with customer defined

external components, produces a linear transfer

function (dB/V) between the input control voltage of

the driver and the attenuation output of the PIN

attenuator. The DR65-0002 has been optimized for

linearizing M/A-COM’s AT10-0009 or AT10-0017

attenuators, but will function well with most types of

cathode grounded, PIN attenuators. The driver is

packaged in a SOW-16 package for commercial

SMT applications. A typical schematic for a 30 dB,

7.5 dB/V linear attenuator is shown in Figure 1.

Ordering Information

Part Number Package

DR65-0002 Bulk Packaging

DR65-0002TR 1000 piece reel

DR65-0002-TBG Test Board with Circuit per Figure 1

(AT10-0009,

GSM Attenuator)

DR65-0002-TBP Test Board with Circuit per Figure 1

(AT10-0017,

PCS Attenuator)

Note: Reference Application Note M513 for reel size

information.

Circuit Description:

(Reference Figures 1 and 2)

The input divider, R1 and the sum of R2 and R3,

sets the overall transfer function of the circuit. To

increase the transfer function, decrease the Control

Voltage and the value of R1. Varying the value of

R4 will optimize the linearity of the circuit. One can

achieve a very linear transfer functio n (less than

± 1 dB/V) by driving the attenuator over a smaller

portion of its dynamic range. In the case of the

AT10-0009 and AT10-0017 attenuators, this would

be limited to a dynamic range of 28 and 25 dB,

respectively. Temperature compensation is a

function temperature coefficient of the thermistor,

R3, and the ratio of R2 to R3, and can only be

optimized once the transfer function and linearity

component values have been establi sh ed.

Pin Configuration

Pin No. Function Pin No. Function

1 N/C 9 N/C

2 N/C 10 N/C

3 REF 11 N/C

4 INPUT + 12 OUTPUT

5 GND 13 N/C

6 N/C 14 + VCC

7 N/C 15 N/C

8 N/C 16 N/C

• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400

• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588

Visit www.macomtech.com for additional data sheets and prod uct information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

Linear Driver for

PIN Diode Attenuators

Rev. V5

DR65-0002

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Figure 1. Linear Attenuator Schematic

M ADR-007098-000100 Dri ver wi th M AAV -007090-000100 VV A

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

0 3 6 9 12 15 18 21 24 27 30

Attenua tion (dB)

Attenuation Error (dB)

Frequency : 1960 MHz

V con t: 0 to 4 .0V

Figure 2. Typical Attenuation Error

DR65-0002 Driver with AT10-0017 VVA

DR65-0002

REF

R2 680

(PTCT) 330

39K

Vcontrol

(0 to 4V)

ATTENNUATOR

+Vcc

R4 360

.01 µF

1,3,4

5,6,8 9,11,12

16,14,13

NOTES:

TRANSFER FUNCTION IS 7.5 dB/V

Vcontrol IS 0V to 4.0V

+Vcc IS 5.0V ± 5%

R3 IS A POSITIVE TEMPERATURE COEFFICIENT THERMISTO R

ATTENUATOR IS AT10-0009 OR AT10-0017 SCHEMATIC

LINEAR ATTENUATOR

RFin

RFoutput

• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400

• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588

Visit www.macomtech.com for additional data sheets and prod uct information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

Linear Driver for

PIN Diode Attenuators

Rev. V5

DR65-0002

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Electrical Specifications: TA = 25°C, Z0 = 50 Ω

Parameter Test Conditions Units Min Typ Max

Output Drive Current Load Dependent mA 10 — —

+VCC Supply Range — V 3.0 5.0 12

+VCC Supply Tolerance — % — 5 —

+VCC Quiescent Current No Load mA — 1.0 2.0

Linearity Application Dependent dB ± 1 ± 2.5 —

Transfer Function Application Dependent dB/V 3 7.5 10

Settling Time 50% Ctl to 90%/10% RF µs — 50 —

Absolute Maximum Ratings 1,2

Parameter Absolute Maximum

+VCC +20 V

Input + ± 5 V

REF ± 5 V

Output Current 20 mA

Operating Temperature -40ºC to +85ºC

Storage Temperature -65ºC to +125ºC

Package Power Dissipation 150 mW

Lead Temperature 300ºC for 10 seconds

1. Exceeding any one or combination of these limits may cause

permanent damage to this device.

2. M/A-COM does not recommend sustained operation near

these survivability limits.

Handling Procedures

Please observe the following precautions to avoid

damage:

Static Sensitivity

Gallium Arsenide Integrated Circuits are sensitive

to electrostatic discharge (ESD) and can be

damaged by static electricity. Proper ESD control

techniques should be used when handling these

devices.

• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400

• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588

Visit www.macomtech.com for additional data sheets and prod uct information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

Linear Driver for

PIN Diode Attenuators

Rev. V5

DR65-0002

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

SOW-16†

† Reference Application Note M538 for lead-free solder reflow

recommendations.