ALPHA AA104-73 Datasheet

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

Specifications subject to change without notice. 5/00A

Features

■ 1 Bit Attenuation of 32 dB DC–1 GHz, 27 dB
1–2 GHz, 24 dB 2–2.5 dB

■ Combine with AA260-85 or AA101-80 for
63 dB 6 Bit Solution

■ Tune with One Capacitor and/or Resistor
to Desired Operating Frequency
and Attenuation

■ Ideal for Both IF and RF Applications Includ­ing Cable, GSM, PCS, EDGE, 3G and ISM

SOT-6

AA104-73

Description

The AA104-73 is a 1 bit, GaAs IC FET digital attenuator in
a low cost SOT-6 package. This attenuator has up to
32 dB total attenuation.The attenuator requires two lines of
voltage control.The AA104-73 is particularly suited where
high attenuation accuracy, low insertion loss and low

Parameter

1

Frequency

2

Min. Typ. Max. Unit

Insertion Loss DC–1.0 GHz 0.8 1.0 dB

1.0–2.0 GHz 0.9 1.2 dB

2.0–2.5 GHz 1.0 1.3 dB

Attenuation Range DC–1.0 GHz 32 dB

1.0–2.0 GHz 27 dB

2.0–2.5 GHz 24 dB

Attenuation Accuracy

3, 4

DC–0.5 GHz ± (0.4 + 10% of Attenuation Setting in dB) dB

0.85–0.95 GHz ± (0.4 + 5% of Attenuation Setting in dB) dB

1.7–2.0 GHz ± (0.5 + 6% of Attenuation Setting in dB) dB

2.0–2.5 GHz ± (0.6 + 7% of Attenuation Setting in dB) dB

VSWR (Insertion Loss State)

5

DC–2.5 GHz 1.2:1 1.5:1

VSWR (Attenuation State)

5

DC–2.5 GHz 1.5:1 2.0:1

Electrical Specifications at -40 to 85°C (0, +3 V), (0, +5 V)

0.074

(1.90 mm REF.)

0.071 (1.80 mm)

0.052 (1.30 mm)

0.037 (0.95 mm) REF.

0.122 (3.10 mm)

0.106 (2.70 mm)

0.006

(0.15 mm)

0.000

(0.00 mm)

0.057 (1.45 mm)

0.035 (0.90 mm)

0.020 (0.51 mm)

0.014 (0.350 mm)

0.126 (3.20 mm)

0.087 (2.20 mm)

PIN 6

PIN 1

PIN 1

INDICATOR

0.022 (0.61 mm)

0.004 (0.10 mm)

0.014

(0.26 mm)

0.004

(0.10 mm)

0.012

(0.30 mm)

TYP.

5.0˚ ± 1˚

5.0˚ ± 1˚

Parameter Condition Frequency Min. Typ. Max. Unit

Switching Characteristics

6

Rise, Fall (10/90% or 90/10% RF) 50 ns
On, Off (50% CTL to 90/10% RF) 100 ns
Video Feedthru 25 mV

Input Power for 1 dB Compression VS= +3 V 0.5–2.5 GHz 14 +21 dBm

VS= +5 V 0.5–2.5 GHz 18 +23 dBm

Intermodulation Intercept Point (IP3) For Two-tone Input Power +10 dBm

VS= +3 V 0.5–2.5 GHz 36 +41 dBm
VS= +5 V 0.5–2.5 GHz 38 +44 dBm

Control Voltages V

Low

= 0 to 0.2 V @ 20 µA Max.

V

High

= +3 V @ 100 µA Max.to +5 V @ 200 µA Max.

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

2. Operates to DC when controlled with negative voltage, C

BP

not required.

3. Attenuation value set by C

BP

.

4. Attenuation referenced to insertion loss.

5. Input/output. In band.

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

7. DC = 30 KHz.

GaAs IC 1 Bit Digital Attenuator
32 dB 2.5 GHz

intermodulation products are required.Typical application
is as a sixth bit value for the AA260-85 and AA101-80.A total
attenuation of 63 dB in 1 dB steps can be obtained by
combining the two attenuators.

GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz AA104-73

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

Specifications subject to change without notice. 5/00A

Typical Performance Data at -40 to 85°C (0, +5 V) CBP= 12 pF, CBL= 47 pF

-1.50

-0.25

-0.50

-0.75

-1.00

-1.25

0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Insertion Loss (dB)

Frequency (GHz)

Insertion Loss vs. Frequency

IL 85˚CIL -40˚C

IL 25˚C

-33

-27

-28

-29

-30

-31

-32

0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20

Max Attenuation (dB)

Frequency (GHz)

32 dB State vs. Frequency

32 dB -40˚C

32 dB 85˚C

32 dB 25˚C

1.0

1.2

1.4

1.6

1.8

2.0

0 0.5 1.0 1.5 2.0 2.5 3.0

VSWR

Frequency (GHz)

VSWR vs. Frequency

Insertion Loss State

S11 25˚C

S22 25˚C

S22 85˚C

S11 -40˚C

S22 -40˚C

S11 85˚C

1.0

3.0

2.5

2.0

1.5

0 0.5 1.0 1.5 2.0 2.5 3.0

VSWR

Frequency (GHz)

VSWR vs. Frequency

32 dB State

S22 25˚C

S11 25˚C

S22 85˚C

S

11

-40˚C

S22 -40˚C

S11 85˚C

Control Voltage Temperature IP3 @ +10 dBm

(V) (°C) each tone (dBm)

3 -40 41
325 42
385 40
5 -40 43
525 44
585 42

IP3 vs. Voltage and Temperature

1 dB 1 dB

Compression Compression

Control Voltage Temperature Insertion Loss 32 dB State

(V) (°C) State (dBm) (dBm)

3 -40 21 16.5
3 25 21 15.0
3 85 21 14.0
5 -40 22 22.5
5 25 22 22.5
5 85 22 22.5

Compression Point vs.
Voltage and Temperature

Frequency:500 MHz.

Two tone input power: +10 dBm each tone.
Tone frequencies: 500 and 501 MHz.