AT20-0106-PIN - 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

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

Rev. V10

AT20-0106

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: 1 dB steps to 50 dB

• Temperature Stability: ± 0.18 dB from –40°C to

+85°C Typical

• Low DC Power Consumption

• Surface Mount Package

• Integral TTL Driver

• High Intercept Point

• Low Cost/High Performance

• 50 Ohm Nominal Impedance

• Lead-Free CR-13 Package

• 260°C Reflow Compatible

• RoHS* Compliant

Description

M/A-COM’s AT20-0106 is a GaAs FET 6-bit digital

attenuator with a 1 dB minimum step size and 50 dB

total attenuation. This attenuator and integral TTL

driver is in a ceramic 24-lead surface mount pack-

age. The AT20-0106 is ideally suited for use where

accuracy, fast switching, low power consumption

and low intermodulation products are required. Typi-

cal 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-106-PIN.

Ordering Information

Part Number Package

AT20-0106-PIN Bulk Packaging

AT20-0106-TR 1000 piece reel

AT20-0106-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 C32 16 GND

5 C16 17 GND

6 Vee (-5V to -8V) 18 GND

7 Vcc (+5V) 19 GND

8 C8 20 GND

9 C4 21 GND

10 C2 22 GND

11 C1 23 GND

12 GND 24 RF1

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

ground.

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

• 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

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

Rev. V10

AT20-0106

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°C1

Parameter Test Conditio ns Frequency Units Min Typ Max

Reference Insertion Loss — DC - 0.5 GHz

DC - 1.0 GHz

DC - 2.0 GHz

—

3.5

3.9

4.2

3.8

4.2

4.6

Attenuation Accuracy 2 Any Single Bit

Any Combination of Bits

(For attenuation to 26 dB)

Any Combination of Bits

(For attenuation 27 to 50 dB)

DC - 2.0 GHz

DC - 1.5 GHz

± (0.3 +4% of atten. setting)

± (0.4 +4% of atten. setting)

± (0.5 +5% of atten. setting)

VSWR — 0.05 - 0.10 GHz

0.101 - 2.0 GHz

Ratio

—

2.0:1

1.8:1

Trise, Tfall 10% to 90% — ns — — 50

Ton, Toff 50% Control to 90/10% RF — ns — — 150

Transients In-Band (peak-peak) — mV — 50 —

1 dB Compression Input Power

Input Power

0.05 GHz

0.5 - 2.0 GHz

dBm

—

+20

+28

—

Input IP3 For two-tone Input Power

Up to +5 dBm

0.05 GHz

0.5 - 2.0 GHz

dBm

—

+34

+46

—

Input IP2 For two-tone Input Power

Up to +5 dBm

0.05 GHz

0.5 - 2.0 GHz

dBm

—

+45

+79

—

Vcc — — V 4.5 5.0 5.5

Vee — — V -8.0 — -5.0

Icc Vcc = 4.5 to 5.5V

Vctl = 0 to 0.8V, or Vcc –

2.1V to Vcc

— mA — — 6.0

Iee Vee = -5.0 to -8.0V — mA — — 1.0

1. All specifications apply when operated with bias voltages of +5V for Vcc and –5.0V for Vee.

2. This attenuator is guaranteed monotonic.

• 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

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

Rev. V10

AT20-0106

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.

Recommended PCB Configuration

Absolute Maximum Ratings 3,4

Parameter Absolute Maximum

Max Input Power

0.05 GHz

0.5 - 2.0 GHz

+27 dBm

+34 dBm

VCC -0.5V ≤ VCC ≤ +7.0V

VEE -8.5V ≤ VEE ≤ +0.5V

Operating Temperature -40°C to +125°C

Storage Temperature -65°C to +150°C

VCC - VEE -0.5V ≤ VCC - VEE ≤ 14.5V

Vin5 -0.5V ≤ Vin ≤ VCC + 0.5V

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

permanent damage to this device.

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

these survivability limits.

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

signal is applied prior to power supply.

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)

C6 C5 C4 C3 C2 C1 Attenuation

0 0 0 0 0 0 Reference

0 0 0 0 0 1 1 dB

0 0 0 0 1 0 2 dB

0 0 0 1 0 0 4 dB

0 0 1 0 0 0 8 dB

0 1 0 0 0 0 16 dB

1 0 0 0 0 0 32 dB

1 1 1 1 1 1 63 dB

Control Inputs

Attenuation Accuracy vs. Frequency

Typical Performance Curves

Insertion Loss vs. Frequen cy

0.0 0 .5 1.0 1.5 2.0

Freq uency (GHz)

Inse rti on Loss (dB)

+85°C +25°C -55°C

-0.60

-0.40

-0.20

0.00

0.20

0.40

0.60

0.0 0 .5 1.0 1.5 2 .0

Fre que nc y ( G H z)

Deviation from Nominal Atten

(dB)

1 dB 2 dB 4 dB 8 dB

0 = TTL Low; 1 = TTL High

• 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

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

Rev. V10

AT20-0106

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.

RF1 VSWR vs. Frequen cy

RF2 VSWR vs. Frequen cy

Typical Performance Curves

Attenuation Accuracy vs. Frequency

-2.00

-1.00

0.00

1. 0 0

2.00

0.0 0.5 1.0 1.5 2.0

Frequency (GHz)

Deviation from Nominal

Atten (dB)

16 dB 32 dB 40 dB 50 dB

1. 2

1. 4

1. 6

1. 8

0.0 0.5 1.0 1.5 2 .0

Frequency (GHz)

VSWR

1 dB4 dB 8 & 16 dB32 dBRef Loss & 2 dB

1. 2

1. 4

1. 6

1. 8

0.0 0.5 1.0 1.5 2.0

Fre quency (GHz )

VSWR

1 dB2 dB8 dB 16 dB Ref Loss

& 4 d B 32 dB

Lead-Free, CR-13 Ceramic Package†

† Reference Application Note M538 for lead-free solder reflow

recommendations.