ALPHA AA260-85

GaAs IC 5 Bit Digital Attenuator
1 dB LSB DC–2 GHz
AA260-85
(Previously AD260-85)*
Features
SSOP-20
■ Attenuation 1.0 dB Steps to 31 dB
with High Accuracy
PIN 20
0.209 (5.30 mm)
±0.012 (0.30 mm)
■ Low DC Power Consumption
0.307 (7.80 mm)
±0.016 (0.307 mm)
■ Low Cost SSOP-20 Plastic Package
PIN 1
INDICATOR
PIN 1
0.283 (7.20 mm)
±0.012 (0.30 mm)
Description
The AA260-85 is a 5 bit, GaAs IC FET digital attenuator
in a low cost SSOP-20 package. This attenuator has an
LSB of 1 dB and a total attenuation of 31 dB. The
AA260-85 is particularly suited where high attenuation
accuracy, low insertion loss and low intermodulation
products are required. Typical applications include
cellular radio, wireless data, wireless local loop and other
gain level control circuits.
0.069
(1.75 mm)
±0.004
(0.10 mm)
0.0256
0.078
(0.65 mm)
(2.00 mm)
BSC
MAX.
0.012
(0.30 mm)
REF.
0.010 (0.25 mm)
0.004 (0.090 mm)
8˚ MAX.
0.008 (0.20 mm) MAX.
0.002 (0.05 mm) MIN.
0.030 (0.75 mm)
±0.008 (0.10 mm)
Electrical Specifications at -40°C to +85°C (0, -5 V)
Parameter1
Frequency2
Condition
Insertion Loss
Min.
Typ.
Max.
Unit
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
1.4
1.6
2.0
1.7
2.0
2.3
dB
dB
dB
DC–1.0 GHz
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.4 + 5% of
Attenuation Setting in dB)
± (0.5 + 6% of
Attenuation Setting in dB)
Attenuation Range
31
Attenuation Accuracy3
DC–1.8 GHz
DC–2.0 GHz
VSWR (I/O)
DC–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
VHigh = -5 V
0.5–2.0 GHz
0.05 GHz
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
VHigh = -5 V
0.5–2.0 GHz
0.05 GHz
Control Voltages
VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = -5 V @ 300 µA Max.
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. DC = 300 kHz.
1.4:1
dB
dB
dB
dB
1.7:1
15
25
25
nS
nS
mV
+25
+18
+29
+22
dBm
dBm
+42
+30
+48
+36
dBm
dBm
3. Attenuation referenced to insertion loss.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
*Due to conflict with another company’s product numbering system, Alpha’s attenuator products starting with the letters “AD” are being changed to “AA”.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 12/00A
1
GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz
AA260-85
Typical Performance Data (0, -5 V)
2.00
-1.2
1.75
+25˚C
-1.4
+85˚C
VSWR
Insertion Loss (dB)
-1.0
-40˚C
-1.6
1.50
31 dB
8 dB
16 dB
1.25
-1.8
2 dB
4 dB
1 dB
-2.0
Ins. Loss
1.00
0
0.5
1.0
1.5
2.0
0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
VSWR vs. Frequency (25˚C)
60
2.00
58
+25˚C
1.75
54
VSWR
IP3 (dBm)
56
-40˚C
52
+85˚C
1.50
31 dB
50
1.25
Ins. Loss
46
4 dB
1 dB
44
2 dB
1.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
0
0.5
1.0
1.5
2.0
Attenuation (dB)
Frequency (GHz)
IP3 vs. Attenuation and
Temperature (500 MHz)
VSWR vs. Frequency (85˚C)
Compression Point vs. Attenuation,
Voltage, and Temperature
2.00
-5
30.1
29.8
30.5
2 dB
-5
29.5
29.4
29.6
4 dB
-5
34.0
32.7
32.9
8 dB
-5
29.5
29.3
29.8
16 dB
-5
28.6
28.6
28.3
31 dB
-5
32.1
31.6
31.3
1.75
VSWR
Input Power @ 1 dB Compression
Attenuation Control
State
Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss
-5
29.6
29.4
29.9
1 dB
8 dB
16 dB
48
1.50
Ins. Loss
31 dB
16 dB
8 dB
1.25
2 dB
4 dB
1 dB
1.00
0
0.5
1.0
1.5
Frequency (GHz)
Frequency = 0.5–2.0 GHz
VSWR vs. Frequency (-40˚C)
2
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 12/00A
2.0
GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz
AA260-85
0.5
Deviation from Nominal
Insertion Phase (Deg.)
Deviation from Nominal
Attenuation (dB)
60
4 dB
8 dB
16 dB
0
1 dB
-0.5
2 dB
31 dB
-1.0
-1.5
-2.0
50
40
31 dB
30
16 dB
20
8 dB
10
0
4 dB
-2.5
0
0.5
1.0
1.5
2.0
0
0.5
1.0
1.5
2.0
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (25˚C)
Attenuation Phase Accuracy
vs. Frequency (25˚C)
60
8 dB
4 dB
Deviation from Nominal
Insertion Phase (Deg.)
16 dB
0
1 dB
-0.5
2 dB
31 dB
-1.0
-1.5
-2.0
50
40
31 dB
30
20
16 dB
8 dB
10
0
1 dB
-2.5
2 dB
4 dB
-10
0
0.5
1.0
1.5
2.0
0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (85˚C)
Attenuation Phase Accuracy
vs. Frequency (85˚C)
60
0.5
8 dB
4 dB
2 dB
0
1 dB
31 dB
-0.5
-1.0
-1.5
-2.0
Deviation from Nominal
Insertion Phase (Deg.)
16 dB
Deviation from Nominal
Attenuation (dB)
1 dB
Frequency (GHz)
0.5
Deviation from Nominal
Attenuation (dB)
2 dB
-10
50
31 dB
40
30
16 dB
20
10
4 dB
0
2 dB
1 dB
1.0
1.5
8 dB
-10
-2.5
0
0.5
1.0
1.5
2.0
0
0.5
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. 12/00A
2.0
3
GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz
AA260-85
Typical Performance Data (0, -3 V)
-1.0
0.5
Deviation from Nominal
Attenuation (dB)
16 dB
Insertion Loss (dB)
-1.2
+25˚C
-40˚C
+85˚C
-1.4
-1.6
-1.8
-2.0
0.5
1.0
1.5
1 dB
-1.0
31 dB
-1.5
-2.0
-2.5
0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
Attenuation Accuracy
vs. Frequency (25˚C)
Deviation from Nominal
Attenuation (dB)
0.5
1.75
1.50
31 dB
16 dB
8 dB
1.25
2 dB
4 dB
1 dB
Ins. Loss
1.00
0
0.5
1.0
16 dB
0
8 dB
4 dB
2 dB
1 dB
-0.5
31 dB
-1.0
-1.5
-2.0
-2.5
-3.0
1.5
2.0
0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR vs. Frequency (25˚C)
Attenuation Accuracy
vs. Frequency (85˚C)
60
0.5
50
0
31 dB
40
30
20
16 dB
8 dB
10
0
1 dB
4 dB
2 dB
-10
Deviation from Nominal
Attenuation (dB)
16 dB
Deviation from Nominal
Insertion Phase (Deg.)
2 dB
-0.5
2.0
2.00
8 dB
4 dB
1 dB
-0.5
2 dB
-1.0
31 dB
-1.5
-2.0
-2.5
-3.0
0
4
4 dB
-3.0
0
VSWR
8 dB
0
0.5
1.0
1.5
2.0
0
0.5
1.0
1.5
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. 12/00A
2.0
GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz
Compression Point vs. Attenuation,
Voltage, and Temperature
60
58
+25˚C
IP3 (dBm)
56
54
+85˚C
52
50
-40˚C
48
46
44
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Attenuation (dB)
25.9
25.7
2 dB
-3
24.7
24.5
24.6
4 dB
-3
29.3
28.7
29.0
8 dB
-3
32.3
31.7
32.3
16 dB
-3
21.6
21.2
21.7
31 dB
-3
24.5
24.4
24.9
V7
V8
V9
-5
0
-5
0
-5
0
-5
0
1 dB
-5
0
-5
-5
0
-5
0
-5
0
2 dB
-5
-5
0
0
-5
-5
0
-5
0
4 dB
-5
-5
0
-5
0
0
-5
-5
0
8 dB
-5
-5
0
-5
0
-5
0
0
-5
16 dB
0
0
-5
0
-5
0
-5
0
-5
31 dB Max. Atten.
V3
V2
NC
V1
2 dB
1 dB
11
0
4 dB
12
Reference I.L.
13
0
14
-5
15
0
16
-5
10
0
9
-5
8
0
7
-5
8 dB
6
-5
V6
V5
V4
17
Attenuation
J1-J2
5
16 dB
Bit
4
8 dB
Bit
18
V6
16 dB
19
V5
4 dB
Bit
V8
V7
20
V9
3
V4
26.2
2
2 dB
Bit
-3
1
V2 V3
1 dB
Pin Out
Truth Table
V1
Input Power @ 1 dB Compression
Attenuation Control
State
Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss
-3
24.8
24.7
24.7
Frequency = 0.5–2.0 GHz
IP3 vs. Attenuation and
Temperature (500 MHz)
1 dB
Bit
AA260-85
J1
GND
GND
GND
GND
GND
GND
GND
GND
J2
Absolute Maximum Ratings
Characteristic
RF Input Power
Value
2.0 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
ΘJC
85°C/W
Note: Exceeding these ratings may cause irreversible damage.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 12/00A
5