ALPHA AA264-87

GaAs IC 4 Bit Digital Attenuator
2 dB LSB Positive Control 0.5–2 GHz
AA264-87
Features
TSSOP-16
■ Attenuation 2 dB Steps to 30 dB
with High Accuracy
PIN 16
0.173 (4.40 mm)
± 0.004 (0.10 mm)
■ Single Positive Control for Each Bit
0.252 (6.4 mm)
BSC
PIN 1
INDICATOR
■ Low DC Power Consumption
0.197 (5.00 mm)
± 0.004 (0.10 mm)
PIN 1
■ Small Low Cost TSSOP-16 Plastic
Package
0.0256 (0.65 mm)
BSC
0.047 (1.20 mm)
MAX.
R 0.004 (0.09 mm)
MIN.
Description
The AA264-87 is a 4 bit, single positive control GaAs IC
FET digital attenuator in a low cost TSSOP-16 package.
The attenuator requires external DC blocking capacitors,
positive supply voltage (VS) and four individual positive
control voltages (V1–V4). The AA264-87 is particularly
suited where high attenuation accuracy, low insertion loss
and low intermodulation products are required. Typical
applications include base station, wireless data and
wireless local loop gain control circuits.
0.009 (0.22 mm) REF.
0.035 (0.90 mm)
+ 0.006 (0.15 mm) /
-0.004 (-0.10 mm)
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.024
(0.60 mm)
± 0.006
(0.15 mm)
Electrical Specifications at -40°C to +85°C (0, +5 V)
Parameter1
Condition
Insertion Loss
Typ.
Max.
Unit
0.5–1.0 GHz
0.5–2.0 GHz
Frequency
Min.
1.6
1.8
2.0
2.4
dB
dB
0.5–1.0 GHz
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.3 + 5% of
2–24 dB Setting)
dB
± (0.3 + 6% of
26–30 dB Setting)
dB
Attenuation Range
30
Attenuation Accuracy2
0.5–2.0 GHz
0.5–2.0 GHz
VSWR
(I/O)3
0.5–0.8 GHz
0.8–2.0 GHz
Switching Characteristics4
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Input Power for 1 dB Compression
VS = +3 V
VS = +5 V
0.5–2.0 GHz
0.5–2.0 GHz
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
VS = +3 V
VS = +5 V
0.5–2.0 GHz
0.5–2.0 GHz
Control Voltages
1.8:1
1.5:1
dB
dB
2.2:1
2.0:1
150
300
70
ns
ns
mV
+15
+21
+21
+27
dBm
dBm
+36
+37
+44
+45
dBm
dBm
VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
VS = VHigh ± 0.2 V
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
3. Input/output.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 9/00A
1
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz
AA264-87
Typical Performance Data (0, +5 V)
0
2.2
30 dB
2.0
16 dB
-1.0
1.8
-40˚C
-1.5
VSWR
Insertion Loss (dB)
-0.5
+85˚C
-2.0
+25˚C
8 dB
4 dB
2 dB
1.6
1.4
-2.5
-3.0
1.2
-3.5
1.0
Ins. Loss
0
0.5
1.0
1.5
2.0
2.5
3.0
0
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
VSWR vs. Frequency (25˚C)
3.0
2.2
60
30 dB
+85˚C
2.0
55
+25˚C
50
16 dB
1.8
-40˚C
VSWR
IP3 (dBm)
0.5
45
8 dB
4 dB
2 dB
1.6
1.4
40
1.2
35
1.0
Ins. Loss
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
0.5
1.0
1.5
2.0
2.5
Attenuation (dB)
Frequency (GHz)
IP3 vs. Attenuation and
Temperature (500 MHz)
VSWR vs. Frequency (85˚C)
Compression Point vs. Attenuation,
Voltage, and Temperature
2.2
30 dB
2.0
2 dB
5
28.3
28.1
28.1
4 dB
5
35.2
34.7
35.0
8 dB
5
25.8
25.3
25.4
16 dB
5
21.7
21.3
21.6
30 dB
5
24.4
23.2
27.2
16 dB
8 dB
1.8
VSWR
Input Power @ 1 dB Compression
Attenuation Control
State
Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss
5
29.0
28.9
29.0
4 dB
1.6
2 dB
1.4
1.2
Ins. Loss
1.0
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
VSWR vs. Frequency (-40˚C)
2
3.0
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 9/00A
3.0
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz
85
30 dB
16 dB
0.5
8 dB
0
-0.5
Deviation from Nominal
Insertion Phase (Deg.)
Deviation from Nominal
Attenuation (dB)
1.0
4 dB
2 dB
-1.0
-1.5
-2.0
-2.5
-3.0
0
1.0
0.5
1.0
1.5
2.0
2.5
65
55
45
30 dB
35
16 dB
25
8 dB
15
4 dB
5
-15
3.0
2 dB
1.0
1.5
2.0
2.5
Attenuation Accuracy
vs. Frequency (25˚C)
Attenuation Phase Accuracy
vs. Frequency (25˚C)
0.5
8 dB
75
4 dB
0
2 dB
-1.0
-1.5
-2.0
-2.5
65
55
45
2.5
4 dB
5
-5
2.0
8 dB
15
-15
1.5
16 dB
25
-3.5
1.0
30 dB
35
-3.0
0.5
3.0
85
16 dB
0
0.5
Frequency (GHz)
30 dB
-0.5
0
Frequency (GHz)
Deviation from Nominal
Insertion Phase (Deg.)
Deviation from Nominal
Attenuation (dB)
75
-5
-3.5
3.0
2 dB
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (85˚C)
Attenuation Phase Accuracy
vs. Frequency (85˚C)
3.0
85
0.5
30 dB
Deviation from Nominal
Insertion Phase (Deg.)
1.0
Deviation from Nominal
Attenuation (dB)
AA264-87
16 dB
0
8 dB
-0.5
2 dB
-1.0
4 dB
-1.5
-2.0
-2.5
75
65
55
45
35
30 dB
16 dB
25
8 dB
15
4 dB
5
2 dB
-5
-3.0
-15
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40˚C)
Attenuation Phase Accuracy
vs. Frequency (-40˚C)
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 9/00A
3.0
3
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz
AA264-87
0
1.0
-0.5
0.5
Deviation from Nominal
Attenuation (dB)
Insertion Loss (dB)
Typical Performance Data (0, +3 V)
-1.0
-1.5
-40˚C
+85˚C
-2.0
+25˚C
-2.5
-3.0
0.5
1.0
1.5
2.0
2.5
-1.0
4 dB
-1.5
-2.0
30 dB
-2.5
-3.0
3.0
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
Attenuation Accuracy
vs. Frequency (25˚C)
2.2
2.0
Deviation from Nominal
Attenuation (dB)
30 dB
16 dB
8 dB
1.8
VSWR
8 dB
2 dB
-4.0
0
4 dB
2 dB
1.6
1.4
1.2
Ins. Loss
1.0
0
0.5
1.0
1.5
2.0
2.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
2 dB
16 dB
4 dB
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
VSWR vs. Frequency (25˚C)
Attenuation Accuracy
vs. Frequency (85˚C)
1.0
80
0.5
70
60
50
40
30 dB
8 dB
6 dB
20
10
3.0
8 dB
Frequency (GHz)
90
30
30 dB
0
3.0
Deviation from Nominal
Attenuation (dB)
Deviation from Nominal
Insertion Phase (dB)
-0.5
-3.5
-3.5
3.0
30 dB
0
8 dB
-0.5
2 dB
16 dB
-1.0
4 dB
-1.5
-2.0
-2.5
-3.0
0
2 dB
4 dB
-10
0
4
16 dB
0
0.5
1.0
1.5
2.0
2.5
-3.5
3.0
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (25˚C)
Attenuation Accuracy
vs. Frequency (-40˚C)
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 9/00A
3.0
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz
57
+25˚C
53
IP3 (dBm)
Compression Point vs. Attenuation,
Voltage, and Temperature
+85˚C
55
51
AA264-87
Input Power @ 1 dB Compression
Attenuation Control
State
Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss
3
21.7
21.6
22.6
-40˚C
49
47
2 dB
3
21.2
20.7
21.4
4 dB
3
34.3
31.0
34.3
41
8 dB
3
33.6
23.0
32.9
39
16 dB
3
18.0
17.0
21.4
37
30 dB
3
22.4
21.2
24.1
45
43
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Attenuation (dB)
Absolute Maximum Ratings
IP3 vs. Attenuation and
Temperature (500 MHz)
Characteristic
Value
RF Input Power
Truth Table
V1
V2
V3
V4
16 dB
8 dB
4 dB
2 dB
Attenuation
J1–J2
VHigh
VHigh
VHigh
VHigh
Reference I.L.
VHigh
VHigh
VHigh
0
2 dB
VHigh
VHigh
0
VHigh
4 dB
VHigh
VHigh
8 dB
VHigh
VHigh
VHigh
16 dB
0
0
0
0
30 dB Max. Atten.
-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.
Pin Out
GND
V1
V2
4
V3
8 dB
5
4 dB
7
GND
8
2 dB
CBL
J1
GND
GND
GND
GND
GND
GND
VS
9
6
GND
11 10
V4
15 14 13 12
GND
3
16 dB
2
VHigh = +3 to +5 V (VS = VHigh ± 0.2 V).
+8 V
Control Voltage
16
0
0
Supply Voltage
1
VHigh
1 W > 500 MHz 0/8 V
0.5 W @ 50 MHz 0/8 V
10 kΩ
CBL
J2
DC blocking capacitors (CBL) and biasing resistor must be supplied externally
for positive voltage operation.
CBL = 47 pF for operation >500 MHz.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 9/00A
5