ALPHA AA104-73

GaAs IC 1 Bit Digital Attenuator
32 dB 2.5 GHz
AA104-73
Features
SOT-6
■ 1 Bit Attenuation of 32 dB DC–1 GHz, 27 dB
1–2 GHz, 24 dB 2–2.5 dB
0.074
(1.90 mm REF.)
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
■ Combine with AA260-85 or AA101-80 for
63 dB 6 Bit Solution
0.071 (1.80 mm)
0.052 (1.30 mm)
PIN 1
INDICATOR
PIN 1
■ Tune with One Capacitor and/or Resistor
to Desired Operating Frequency
and Attenuation
0.020 (0.51 mm)
0.014 (0.350 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
■ Ideal for Both IF and RF Applications Including Cable, GSM, PCS, EDGE, 3G and ISM
0.037 (0.95 mm) REF.
0.012
(0.30 mm)
TYP.
5.0˚ ± 1˚
0.014
(0.26 mm)
0.004
(0.10 mm)
5.0˚ ± 1˚
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
0.122 (3.10 mm)
0.106 (2.70 mm)
0.022 (0.61 mm)
0.004 (0.10 mm)
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.
Electrical Specifications at -40 to 85°C (0, +3 V), (0, +5 V)
Parameter1
Frequency2
Typ.
Max.
Unit
Insertion Loss
DC–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
0.8
0.9
1.0
1.0
1.2
1.3
dB
dB
dB
Attenuation Range
DC–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
32
27
24
Attenuation Accuracy3, 4
DC–0.5 GHz
0.85–0.95 GHz
1.7–2.0 GHz
2.0–2.5 GHz
VSWR (Insertion Loss State)5
VSWR (Attenuation
State)5
Parameter
Switching
Characteristics6
Min.
±
±
±
±
(0.4
(0.4
(0.5
(0.6
+
+
+
+
dB
dB
dB
10% of Attenuation Setting in dB)
5% of Attenuation Setting in dB)
6% of Attenuation Setting in dB)
7% of Attenuation Setting in dB)
DC–2.5 GHz
1.2:1
1.5:1
DC–2.5 GHz
1.5:1
2.0:1
Condition
Frequency
Min.
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Typ.
dB
dB
dB
dB
Max.
Unit
50
100
25
ns
ns
mV
Input Power for 1 dB Compression
VS = +3 V
VS = +5 V
0.5–2.5 GHz
0.5–2.5 GHz
14
18
+21
+23
dBm
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +10 dBm
VS = +3 V
VS = +5 V
0.5–2.5 GHz
0.5–2.5 GHz
36
38
+41
+44
dBm
dBm
Control Voltages
VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = +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, CBP not required.
3. Attenuation value set by CBP.
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.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 5/00A
1
GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz
AA104-73
0
-27
-0.25
-28
-0.50
Max Attenuation (dB)
Insertion Loss (dB)
Typical Performance Data at -40 to 85°C (0, +5 V) CBP = 12 pF, CBL = 47 pF
IL 25˚C
-0.75
IL -40˚C
-1.00
IL 85˚C
-1.25
-1.50
0.0
0.5
1.0
1.5
2.0
2.5
-30
32 dB 85˚C
-31
32 dB 25˚C
-32
-33
0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20
3.0
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
32 dB State vs. Frequency
2.0
3.0
S11 -40˚C
1.8
2.5
S11 -40˚C
VSWR
S22 -40˚C
1.6
VSWR
32 dB -40˚C
-29
S11 85˚C
1.4
S11 25˚C
S22 25˚C
S22 25˚C
1.0
1.5
S22 -40˚C
1.5
1.0
0.5
S11 25˚C
2.0
S22 85˚C
S22 85˚C
1.2
0
S11 85˚C
2.0
2.5
1.0
0
3.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR vs. Frequency
Insertion Loss State
VSWR vs. Frequency
32 dB State
Compression Point vs.
Voltage and Temperature
3.0
IP3 vs. Voltage and Temperature
Control Voltage
(V)
Temperature
(°C)
1 dB
Compression
Insertion Loss
State (dBm)
1 dB
Compression
32 dB State
(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
Control Voltage
(V)
Temperature
(°C)
IP3 @ +10 dBm
each tone (dBm)
3
-40
41
3
25
42
3
85
40
5
-40
43
5
25
44
5
85
42
Two tone input power: +10 dBm each tone.
Tone frequencies: 500 and 501 MHz.
Frequency: 500 MHz.
2
2.5
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 5/00A
GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz
AA104-73
2.0
0
2.2 pF
1.8
-10
2.7 pF
2.2 pF
1.6
VSWR
Attenuation (dB)
-5
-15
2.7 pF
-20
1.4
-25
Ins. Loss
3.3 pF
12 pF
3.3 pF
1.2
-30
12 pF
1.0
-35
0
0.5
1.0
1.5
2.0
2.5
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Attenuation vs. Frequency DC–2.5 GHz
CBP = 2.2, 2.7, 3.3 and 12 pF
VSWR vs. Frequency DC–2.5 GHz
CBP = 2.2, 2.7, 3.3 and 12 pF
-15.0
2.0
-17.5
1.8
-20.0
-22.5
2.2 pF
VSWR
Attenuation (dB)
220 pF
1.6
1.4
1500 pF
-25.0
3.3 pF
-27.5
1000 pF
2.7 pF
1.2
Ins. Loss
-30.0
1.50
1.0
1.75
2.00
2.25
0
2.50
0.1
0.2
0.3
0.4
0.5
Frequency (GHz)
Frequency (GHz)
Attenuation vs. Frequency 1.5–2.5 GHz
CBP = 2.2, 2.7, and 3.3 pF
VSWR vs. Frequency DC–0.5 GHz
CBP = 220, 1000, 1500 pF
-20
220 pF
Attenuation (dB)
-24
1000 pF
-28
-32
1500 pF
-36
-40
0
0.1
0.2
0.3
0.4
CBL (pF)
CBP (pF)
Operating Frequency (GHz)
47
2.2
2.00–2.30
47
2.7
1.80–2.00
47
3.3
1.60–1.80
47
12
0.90–1.05
47
15
0.80–0.90
330
220
0.20–0.35
1500
1000
0.07–0.20
10000
1500
0.015–0.25
0.5
Frequency (GHz)
Attenuation vs. Frequency DC–0.5 GHz
CBP = 220, 1000, 1500 pF
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 5/00A
3
GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz
Pin Out
AA104-73
Absolute Maximum Ratings
Positive Voltage
Characteristic
Value
RF Input Power
V2
6
1
J1
CBL
5
2
32
NC/GND
CBP
4
J2
3
RF
GND
V1
1 W > 500 MHz 0/8 V
0.5 W @ 50 MHz 0/8 V
Supply Voltage
+8 V
Control Voltage
-0.2 V, +8 V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
Note: Exceeding these parameters may cause irreversible damage.
CBL
CBL = 47 pF for frequencies >500 MHz. See Table on previous page for
CBP value.
See application notes APN2013 and APN2014 for 6 bit attenuator requirements.
Truth Table
Positive Control
V2
Attenuation
J1–J2
VHigh
0
Reference I.L.
0
VHigh
32 dB
V1
VHigh = +3 to +5 V.
Application: AA104-73 used as 1 Bit 20 dB Attenuator 25°C (0, +5 V)
2.50
6
V2
5
1
J1
NC/GND
CBL
2.25
2
20
CBP RBP
4
VSWR
2.00
3
RF
GND
J2
V1
CBL
CBL = 220 pF, CBP = 100 pF, RBP = 15 Ω, fC = 400 MHz with select values of
CBP and RBP, center frequency and attenuation value respectively
can be varied.
1.75
1.50
S22 25˚C
1.25
1.00
-15
0
-16
Max Attenuation (dB)
S11 25˚C
0.2
0.4
0.6
0.8
Frequency (GHz)
-17
VSWR vs. Frequency
20 dB State
-18
-19
-20
-21
-22
20 dB 25˚C
-23
-24
-25
0
0.2
0.4
0.6
0.8
1.0
Frequency (GHz)
20 dB State vs. Frequency
CBP = 100 pF, CBL = 220 pF, RBP = 15 Ω
4
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 5/00A
1.0