Preliminary
GaAs IC 3 Bit Digital Attenuator
4 dB LSB Positive Control 0.75鈥? GHz
AA100-59
Features
s
Attenuation in 4 dB Steps to 28 dB
with High Accuracy
s
Single Positive Control Voltage
for Each Bit
s
+3 V to +5 V Operation
s
Small Low Cost MSOP-8 Plastic Package
MSOP-8
0.0256 (0.65 mm) TYP.
PIN 1
INDICATOR
0.118 (3.00 mm)
鹵 0.004 (0.1 mm)
SQ.
0.193 (4.90 mm)
REF.
PIN 1
0.012 (0.30 mm)
+ 0.006 (0.15 mm)
- 0.002 (0.05 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.
7.0藲
0.038 (0.95 mm) TYP.
0.030 (0.75 mm)
0.017
(0.43 mm)
0.007 (0.18 mm)
鹵 0.005 (0.12 mm)
8.0藲
MAX.
0.006 (0.15 mm)
0.002 (0.05 mm)
0.028 (0.70 mm)
0.016 (0.40 mm)
Electrical Specifications at 25擄C (0, +3 V)
Parameter
1
Insertion Loss
2
Attenuation Range
Attenuation Accuracy
3
Frequency
0.75鈥?.0 GHz
0.75鈥?.0 GHz
0.75鈥?.0 GHz
0.75鈥?.0 GHz
VSWR (I/O)
0.75鈥?.0 GHz
Min.
Typ.
1.8
28
鹵 (0.2 + 3% of
Attenuation Setting in dB)
鹵 (0.3 + 3% of
Attenuation Setting in dB)
1.5:1
2.0:1
Max.
2.1
Unit
dB
dB
dB
dB
Operating Characteristics at 25擄C (0, +3 V)
Parameter
Switching Characteristics
4
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
V
S
= +3 V
V
S
= +5 V
For Two-tone Input Power +10 dBm
V
S
= +3 V
V
S
= +5 V
0.75鈥?.0 GHz
0.75鈥?.0 GHz
0.75鈥?.0 GHz
0.75鈥?.0 GHz
Frequency
Min.
Typ.
0.7
1.0
50
+20
+26
+32
+45
Max.
Unit
碌s
碌s
mV
dBm
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
V
Low
= 0 to 0.2 V @ 20 碌A(chǔ) Max.
V
High
= +3 V @ 100 碌A(chǔ) Max. to +5 V @ 200 碌A(chǔ) Max.
V
S
= V
High
鹵 0.2 V
1. All measurements made in a 50
鈩?/div>
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/擄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
鈥?/div>
Fax
[617] 824-4579
鈥?/div>
Email
sales@alphaind.com
鈥?/div>
www.alphaind.com
Specifications subject to change without notice. 3/99A
1
1
2
