AT20-0107-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 product 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.

Digital Attenuator

31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz

Rev. V7

AT20-0107

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

• Attenuation: 0.5 dB Steps to 31.5 dB1

• Temperature Stability: ±0.18 dB from –40ºC to +85ºC

Typ.

• Low DC Power Consumption

• Surface Mount Package

• Integral TTL Driver

• High Intercept Point

• Low Cost/High Performance

• Lead-Free CR-13 Package

• 260°C Reflow Compatible

• RoHS* Compliant

Description

M/A-COM's AT20-0107 is a GaAs FET 6-bit digital

attenuator with a 0.5 dB minimum step size and a

31.5 dB total attenuation. This attenuator and inte-

gral TTL driver is in a ceramic 24-lead surface mount

package. The AT20-0107 is ideally suited for use

where accuracy, fast speed, very low power

consumption and low intermodulation products are

required. Typical applications include dynamic range

setting in precision receiver circuits and other gain/

leveling control circuits. Available with enhanced

performance as fully hermetic version. Environmen-

tally screenable as P/N AT-107-PIN.

Ordering Information

Part Number Package

AT20-0107-PIN Bulk Packaging

AT20-0107-TR 1000 piece reel

AT20-0107-TB Sample Test Board

Note: Reference Application Note M513 for reel size

information.

Functional Schematic

Pin Configuration

Pin No. Function Pin No. Function

1 GND 13 RF2

2 GND 14 GND

3 GND 15 GND

4 C16 16 GND

5 C8 17 GND

6 Vee 18 GND

7 Vcc 19 GND

8 C4 20 GND

9 C2 21 GND

10 C1 22 GND

11 C0.5 23 GND

12 GND 24 RF1

* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.

The metal bottom of the case must be connected to RF and DC

ground.

• 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 product 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.

Digital Attenuator

31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz

Rev. V7

AT20-0107

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°C2

Parameter Frequency Units Min Typ Max

Insertion Loss DC - 2.0 GHz dB — 3.2 3.8

Attenuation Accuracy1,3,4 DC - 2.0 GHz dB — — +(.3 +7% of atten.)

-(.2 +1% of atten.)

VSWR DC - 2.0 GHz Ratio — — 1.8:1

Trise, Tfall

Ton, Toff

Transients

—

150

—

1 dB Compression 5 50 MHz

0.5 - 2.0 GHz

dBm

—

+21

+29

—

Input IP3 5 50 MHz

0.5 - 2.0 GHz

dBm

—

+35

+48

—

Input IP2 5 50 MHz

0.5 - 2.0 GHz

dBm

—

+45

+79

—

Vcc

-Vee

—

4.5

-8.0

5.0

—

5.5

-5.0

Icc — mA — — 6.0

Test Conditions

—

Any Bit or Combination of

Bits

Full Range

10% to 90%

50% Control to 90%/10%

In-band (peak to peak)

Input Power

Two Tone Inputs up to

+5 dBm

Two Tone Inputs up to

+5 dBm

—

Vcc = 4.5 to 5.5V

-Iee -Vee = -5.0 to -8.0V — mA — — 1.0

1. Above reference insertion loss.

2. All specifications apply when operated with bias voltages of +5V for VCC and –5.0 V to –8.0 V for VEE and 50Ω impedance at all ports

unless otherwise stated.

3. This attenuator is guaranteed monotonic.

4. For the attenuator to meet the guaranteed specifications, it is necessary to have a DC return on either RF1 or RF2. The DC return can be

either a 10KΩ resistor, or an RF choke.

5. VEE = -5 V for the typical numbers given.

Absolute Maximum Ratings 6,7

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 2.0 GHz

+27 dBm

+34 dBm

VCC -0.5V ≤ VCC ≤ +7.0V

VCC - VEE -0.5V ≤ VCC - VEE ≤ 14.5V

Vin8 -0.5V ≤ Vin ≤ VCC + 0.5V

Operating Temperature -40°C to +125°C

Storage Temperature -65°C to +150°C

VEE -8.5V ≤ VEE ≤ +0.5V

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

permanent damage to this device.

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

these survivability limits.

8. Standard CMOS TTL interface, latch-up will occur if logic

signal is applied prior to power supply.

Recommended PCB Configuration

• 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 product 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.

Digital Attenuator

31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz

Rev. V7

AT20-0107

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.

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.

Truth Table (Digital Attenuator)

C16 C8 C4 C2 C1 C0.5 Attenuation

0 0 0 0 0 0 Loss, Reference

0 0 0 0 0 1 0.5 dB

0 0 0 0 1 0 1.0 dB

0 0 0 1 0 0 2.0 dB

0 0 1 0 0 0 4.0 dB

0 1 0 0 0 0 8.0 dB

1 0 0 0 0 0 16.0 dB

1 1 1 1 1 1 31.5 dB

0 = TTL Low; 1 = TTL High

Attenuation Accuracy vs. Frequency

Typical Performance Curves

Insertion Loss vs. Frequen cy

0 0.5 1 1.5 2

Frequency (GHz)

Loss (d B)

+85 °C -40 °C+25 °C

-0.6

-0.4

-0.2

0.2

0.4

0.6

0 0.5 1 1.5 2

Frequency (GHz)

Deviation (dB)

1 dB 2 dB 4 dB0.5 dB

RF1 VSWR vs. Frequen cy

Attenuation Accuracy vs. Frequency

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

0 0.5 1 1.5 2

Freq uency (GHz)

Deviation (dB)

3 1.5 dB8 dB16 d B

1. 2

1. 4

1. 6

1. 8

0 0.5 1 1.5 2

Frequency (GHz)

Deviation (dB)

Loss & 0 .5 dB 2 dB 1 dB 4 dB 8 & 16 dB

• 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 product 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.

Digital Attenuator

31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz

Rev. V7

AT20-0107

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.

RF2 VSWR vs. Frequen cy

Typical Performance Curves

1. 2

1. 4

1. 6

1. 8

00.511.52

Fre quency (GHz)

Deviation (dB)

Lo ss & 0 . 5 dB1 & 2 dB 16 d B4 dB 8 dB

Lead-Free, CR-13 Ceramic Package†

† Reference Application Note M538 for lead-free solder reflow

recommendations.