MACOM AT-220TR, AT-220RTR, AT-220 Datasheet

AT-220 11/15/96 1:49 PM Page 1 (Black plate)

Digital Attenuator, 30 dB, 4-Bit
DC - 2 GHz

Features

●

Attenuation 2-dB Steps to 30 dB

●

High Accuracy +/-3%

●

Temperature Stability +/-0.15 dB from -40°C to +85°C

●

Low Intermodulation Product: +50 dBm IP3

●

Low DC Power Consumption: 50 mW

●

Low Cost SOIC 16 Plastic Package

●

Tape and Reel Packaging Available1

Description

M/A-COM’s AT-220 is a 4-bit, 2-dB step GaAs MMIC
digital attenuator in a low cost SOIC 16-lead surface
mount plastic package. The AT-220 is ideally suited for
use where high accuracy, fast switching, very low power
consumption and low intermodulation products are
required. Typical applications include radio and cellular
equipment, wireless LANs, GPS equipment and other

SO-16

Pin #16

.1497-.1574

(3.80-4.00)

-B-

Pin #1

Orientation

Mark

0.3859-0.3937
(9.80-10.00)

-A-


.004 (0.10)

0.050(1.27) BSC.
.013-.020 TYP

(0.33-0.51)





.010(0.25) M C A M B S



16-Lead SOP outline dimensions

(All dimensions per JEDEC No. MS-012-AC, Issue C)

Unless Otherwise Noted: .xxx = ± 0.010 (.xx = ± 0.25)

Dimensions in ( ) are in mm.



.0532-.0688

(1.35-1.75)

-C-

.0040-.0098

(0.10-0.25)

Narrow body .150

.xx = ± 0.02 (.x = ±0.5)

.2284-.2440

(5.80-6.20)



.010(0.25) M B M

.0099-.0196 x 45°

Chamfer

(0.25-0.50)

0°-8°

.016-.050

(0.40-1.27)

AT-220

V3.00

.0075-.0098

(0.19-0.25)

Gain/Level Control circuits.

Ordering Information

The AT-220 is fabricated with a monolithic GaAs MMIC
using a mature 1-micron process. The process features
full chip passivation for increased performance and
reliability.

Electrical Specifications, T

Parameter Test Conditions

Reference Insertion Loss DC – 0.1 GHz dB 1.2 1.4

Attenuation Accuracy

VSWR 1.2:1

Trise, Tfall 10% to 90% RF, 90% to 10% RF nS 12

Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS 18

Transients In Band mV 25

1 dB Input Power 0.05 GHz dBm 20

Compression Input Power 0.5 – 2.0 GHz dBm 28

IP

IP

1. Refer to “Tape and Reel Packaging” Section, or contact factory.

2. All measurements at 1 GHz in a 50Ω system, unless otherwise specified.

3. Attenuation accuracy specifications apply with negative bias control and low inductance grounding.

M/A-COM, Inc.

North America: Tel. [phone] ■ Asia/Pacific: Tel. [phone] ■ Europe: Tel. [phone]

3

Measured Relative 0.05 GHz dBm 45

2

3

to Input Power 0.5 – 2.0 GHz dBm 68
(For two-tone Input Power Up to +5 dBm)

Measured Relative 0.05 GHz dBm 40
to Input Power 0.5 – 2.0 GHz dBm 50
(For two-tone Input Power Up to +5 dBm)

Specifications Subject to Change Without Notice.

Fax [phone] Fax [phone] Fax [phone]

= 25°C

A

2

Part Number Package

AT-220 PIN SOIC 16-Lead Plastic Package
AT-220TR Forward Tape & Reel
AT-220RTR Reverse Tape & Reel

Unit Min. Typ. Max

DC – 0.1 GHz dB 1.5 1.7
DC – 1.0 GHz dB 1.6 1.8
DC – 2.0 GHz dB 1.8 2.1

DC – 1.0 GHz ±(0.15 dB + 3% of Attenuation Setting in dB) dB
DC – 2.0 GHz ±(0.30 dB + 3% of Attenuation Setting in dB) dB

1

AT-220 11/15/96 1:49 PM Page 2 (Black plate)

Digital Attenuator, 30 dB, 4-Bit AT-220

Absolute Maximum Ratings

Parameter Absolute Maximum

Max. Input Power

50 MHz +27 dBm

500-2000 MHz +34 dBm
Control Voltage +5V, -8.5V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C

1. Operation of this device above any one of these parameters may
cause permanent damage.

1

Pin Configuration

Pin Description Pin No. Description

1 VC1 9 RF2
2 VC1 10 GND
3 VC2 11 GND
4 VC2 12 GND
5 VC3 13 GND
6 VC3 14 GND
7 VC4 15 GND
8 VC4 16 RF1

Typical Performance

INSERTION LOSS vs FREQUENCY

3.0

2.0

LOSS (dB)

1.0
+ 25˚C

0

0

VSWR vs FREQUENCY

2.0

1.8

4 dB ATTEN

1.6

VSWR

1.4

1.2

1.0

0 0.5

2

Specifications Subject to Change Without Notice.

North America: Tel. [phone] ■ Asia/Pacific: Tel. [phone] ■ Europe: Tel. [phone]

+ 85˚C

- 40˚C

0.5 1.0 1.5 2.0

FREQUENCY (GHz)

2 dB ATTEN

16 dB ATTEN

INSERTION LOSS

8 dB ATTEN

1.0 1.5 2.0

FREQUENCY (GHz)

Fax [phone] Fax [phone] Fax [phone]

Functional Schematic

RF1 GNDGND GNDGNDGND RF2GND

16 15 14 13 12 11 10 9

8 dB 4 dB 2 dB 1 dB

2

1

1

2

VC1 VC1VC2 VC3 VC3 VC4 VC4VC2

3

0

76543

8

Truth Table

Control Inputs

VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1

1 0 1 0 1 0 1 0 Reference
01101010 2 dB
10011010 4 dB
10100110 8 dB

1 0 1 0 1 0 0 1 16 dB

0 1 0 1 0 1 0 1 30 dB

"0" = Vin Low, Vin Low = 0V, "1" = Vin High, Vin High = -5V

"0" = 0 to -0.2V @ 20mA Max
"1" = -5V @ 10 mA typ to -8V @ 200 mA Max

ATTENUATION ACCURACY vs FREQUENCY

1.5
1

2 dB ATTEN

0.5

0

-0.5

DEVIATION FROM

-1

-1.5

NOMINAL ATTENUATION (dB)

0.0 0.5

16 dB ATTEN

30 dB ATTEN

1.0 1.5 2.0

FREQUENCY (GHz)

ATTENUATION vs FREQUENCY

0

-2

-4

-6

-8

-10

-12

-14

-16

LOSS (dB)

-18

-20

-22

-24

-26

-28

-30

-32

0.0

0.5 1.0 1.5 2.0

FREQUENCY (GHz)

Attenuation

(dB)

8 dB ATTEN

4 dB ATTEN

M/A-COM, Inc.

V3.00