ALPHA AA100-59

Preliminary
GaAs IC 3 Bit Digital Attenuator
4 dB LSB Positive Control 0.75–2 GHz
AA100-59
Features
MSOP-8
■ Attenuation in 4 dB Steps to 28 dB
with High Accuracy
0.0256 (0.65 mm) TYP.
PIN 1
INDICATOR
■ Single Positive Control Voltage
for Each Bit
■ +3 V to +5 V Operation
PIN 1
■ Small Low Cost MSOP-8 Plastic Package
7.0˚
0.038 (0.95 mm) TYP.
0.030 (0.75 mm)
Description
The AA100-59 is a 3 bit, single positive control, 4 dB step
GaAs IC FET digital attenuator in a low cost MSOP-8
plastic package. For positive operation external DC
blocking capacitors are required on all RF ports. The
AA100-59 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.
0.118 (3.00 mm)
± 0.004 (0.1 mm)
SQ.
0.012 (0.30 mm)
0.017
(0.43 mm)
0.193 (4.90 mm)
REF.
+ 0.006 (0.15 mm)
- 0.002 (0.05 mm)
0.007 (0.18 mm)
± 0.005 (0.12 mm)
0.006 (0.15 mm)
0.002 (0.05 mm)
8.0˚
MAX.
0.028 (0.70 mm)
0.016 (0.40 mm)
Electrical Specifications at 25°C (0, +3 V)
Parameter1
Typ.
Max.
Unit
Insertion Loss2
0.75–2.0 GHz
1.8
2.1
dB
Attenuation Range
0.75–2.0 GHz
28
dB
0.75–1.0 GHz
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.3 + 3% of
Attenuation Setting in dB)
dB
Attenuation
Frequency
Accuracy3
0.75–2.0 GHz
VSWR (I/O)
Min.
0.75–2.0 GHz
1.5:1
2.0:1
Typ.
Max.
dB
Operating Characteristics at 25°C (0, +3 V)
Parameter
Switching
Characteristics4
Condition
Frequency
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Min.
Unit
0.7
1.0
50
µs
µs
mV
Input Power for 1 dB Compression
VS = +3 V
VS = +5 V
0.75–2.0 GHz
0.75–2.0 GHz
+20
+26
dBm
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +10 dBm
VS = +3 V
VS = +5 V
0.75–2.0 GHz
0.75–2.0 GHz
+32
+45
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.
VS = VHigh ± 0.2 V
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation referenced to insertion loss.
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. 3/99A
1
GaAs IC 3 Bit Digital Attenuator 4 dB LSB Positive Control 0.75–2 GHz
AA100-59
Typical Performance Data (0, +3 V)
2.0
6
5
1.5
dB
4
3
1.0
2
0.5
1
0
0
0.5
1.0
1.5
2.0
0.5
2.5
1.5
2.0
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
VSWR vs. Frequency (All States)
30
Absolute Maximum Ratings
25
Characteristic
Value
RF Input Power
20
dB
1.0
15
10
5
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.
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Pin Out
VS
Attenuation vs. Frequency (All States)
10 kΩ
CBL
VHigh
VHigh
Ins. Loss
VHigh
0
VHigh
4 dB
VHigh
VHigh
0
8 dB
VHigh
0
0
12 dB
0
VHigh
VHigh
16 dB
0
0
VHigh
20 dB
0
VHigh
0
24 dB
0
0
0
28 dB
16
dB
V1
GND
5
VHigh
GND
V3
6
8 dB
4
dB
GND
7
4 dB
V2
8
16 dB
Attenuation
J1–J2
4
V3
3
V2
8
dB
2
V1
1
J1
Truth Table
J2
DC blocking capacitors (CBL) and biasing resistor must be supplied externally
for positive operation.
CBL = 100 pF for operation >.75 GHz.
VHigh = +3 to +5 V (VS = VHigh ± 0.2 V).
2
CBL
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 3/99A