ALPHA AT001D6-25 Datasheet

Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com 1

Specifications subject to change without notice. 3/99A

Parameter Condition Frequency Min. Typ. Max. Unit

Switching Characteristics

5

Rise, Fall (10/90% or 90/10% RF) 10 ns
On, Off (50% CTL to 90/10% RF) 20 ns
Video Feedthru 20 mV

Input Power for 1 dB Compression 0.50–1.0 GHz +24 dBm

0.05 GHz +14 dBm

Intermodulation Intercept Point (IP3) For Two-tone Input Power +13 dBm 0.50–1.0 GHz +43 dBm

0.05 GHz +32 dBm

Control Voltages V

Low

= 0 to -0.2 V @ 20 µA Max.

V

High

= -5 V @ 50 µA to -8 V at 200 µA Max.

GaAs IC 4 Bit Digital Attenuator
3 dB LSB DC–1 GHz

Features

■ Attenuation in 3 dB Steps to 45 dB

■ Low DC Power Consumption

■ Low Cost SOIC-16 Plastic Package

SOIC-16

AT001D6-25

0.158 (4.00 mm)

0.150 (3.80 mm)

0.068

(1.73 mm) MAX.

0.244 (6.20 mm)

0.228 (5.80 mm)

0.049 (1.24 mm)

0.016 (0.41 mm)

0.016 MAX.
(0.41 mm)

x 45˚

CHAMFER

0.020 (0.51 mm)

0.013 (0.33 mm)

0.050

(1.27 mm) BSC

PIN 16

PIN 1

PIN 1

INDICATOR

0.394 (10.00 mm)

0.386 (9.80 mm)

0.010 (0.25 mm)

0.004 (0.10 mm)

0.0098 (0.25 mm)

0.0075 (0.19 mm)

8˚ MAX.

Description

The AT001D6-25 is an IC FET digital attenuator consisting
of four monolithic attenuators with LSB of 3 dB and a total
attenuation of 45 dB with all attenuators connected.

The attenuator is packaged in the plastic 16 lead surface
mount package for low cost commercial cellular radio
applications.

Parameter

1

Frequency

2

Min. Typ. Max. Unit

Insertion Loss

3

DC–0.5 GHz 2.5 3.2 dB
DC–1.0 GHz 3.5 4.0 dB

Attenuation Range

4

DC–1.0 GHz 10% or ± 0.5 dB

Whichever is Greater
12% for 45 dB Attenuation

VSWR (I/O) DC–0.5 GHz 1.4:1 1.6:1

DC–1.0 GHz 1.6:1 1.8:1

Electrical Specifications at 25°C (0, -5 V)

Operating Characteristics at 25°C (0, -5 V)

1.All measurements made in a 50 Ω system, unless otherwise specified.

2. DC = 300 kHz.

3. Insertion loss changes by 0.003 dB/°C.

4. Attenuation referenced to insertion loss.

5.Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.

2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com

Specifications subject to change without notice. 3/99A

GaAs IC 4 Bit Digital Attenuator 3 dB LSB DC–1 GHz AT001D6-25

V1V2V3V

4

V5V6V7V

8

Attenuation

12 dB 3 dB 6 dB 24 dB J1–J

2

-5 0 -5 0 0 -5 0 -5 Reference I.L.

-5 0 0 -5 0 -5 0 -5 3 dB

-5 0 -5 0 -5 0 0 -5 6 dB
0 -5 -5 0 0 -5 0 -5 12 dB

-5 0 -5 0 0 -5 -5 0 24 dB
0 -5 0 -5 -5 0 -5 0 45 dB

5

4

3

2

1

DC 0.5 1.0

Frequency (GHz)

Insertion Loss vs. Frequency

dB

0

+85˚C

-40˚C

Frequency (GHz)

dB

45

40

35

30

25

20

DC 0.5 1.0

24, 36, 45 dB States

Frequency (GHz)

dB

15

DC 0.5 1.0

12

9

6

3

0

3, 6, 12 dB States

Typical Performance Data (0, -5 V)

J

1

J

2GND GND GND GND GND GND

V

1

V

2

V

3V4

V

5V6

V

7V8

1 2 3 4 5 6 7 8

16 15

14

13 12 11 10 9

24 dB 6 dB 3 dB 12 dB

Characteristic Value

RF Input Power 2 W > 500 MHz 0/-8 V

0.5 W @ 50 MHz 0/-8 V

Control Voltage +0.2 V, -8 V
Operating Temperature -40°C to +85°C

Storage Temperature -65°C to +150°C

Θ

JC

25°C/W

Absolute Maximum Ratings Pin Out

Frequency (GHz)

VSWR vs. Frequency (All States)

2.5

2.2

1.9

1.6

1.3

1.0

1.00.5DC

Truth Table

Note: Exceeding these parameters may cause irreversible damage.