Preliminary
GaAs IC 5 Bit Digital Attenuator with Driver
1 dB LSB Positive Control DC鈥? GHz
AA110-85
Features
s
Attenuation 1 dB Steps to 31 dB With
High Accuracy
s
Single Positive Control (+5 V) for Each Bit
s
Low DC Power Consumption
s
CMOS Integrated Silicon Driver
s
Designed for Use at IF Frequencies
SSOP-20
PIN 20
0.209 (5.30 mm)
鹵0.012 (0.30 mm)
0.307 (7.80 mm)
鹵0.016 (0.307 mm)
PIN 1
INDICATOR
PIN 1
0.283 (7.20 mm)
鹵0.012 (0.30 mm)
Description
The AA110-85 is a 5 bit, single positive control GaAs IC
FET digital attenuator with driver. It is particularly suited
at IF frequencies where high attenuation accuracy, low
insertion loss and low intermodulation products are
required. Typical applications include base station,
wireless data, broadband and wireless local loop gain
control circuits.
0.069
(1.75 mm)
鹵0.004
(0.10 mm)
0.0256
0.078
(0.65 mm)
(2.00 mm)
BSC
MAX.
0.010 (0.25 mm)
0.004 (0.090 mm)
8藲 MAX.
0.012
(0.30 mm)
REF.
0.008 (0.20 mm) MAX.
0.002 (0.05 mm) MIN.
0.030 (0.75 mm)
鹵0.008 (0.10 mm)
Electrical Specifications at 25擄C (0, +5 V)
Parameter
1
Insertion Loss
2
Frequency
DC鈥?.5 GHz
DC鈥?.0 GHz
DC鈥?.0 GHz
DC鈥?.5 GHz
DC鈥?.0 GHz
DC鈥?.0 GHz
VSWR (I/O)
4
DC鈥?.0 GHz
Min.
Typ.
1.4
1.7
2.2
31
鹵 (0.2 + 2% of
Attenuation Setting in dB)
鹵 (0.25 + 3% of
Attenuation Setting in dB)
鹵 (0.4 + 6% of
Attenuation Setting in dB)
1.5:1
1.8:1
Max.
1.7
2.1
2.6
Unit
dB
dB
dB
dB
dB
dB
dB
Attenuation Range
Attenuation Accuracy
3
Operating Characteristics at 25擄C (0, +5 V)
Parameter
Switching
Characteristics
5
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
V
CC
= +5 V
For Two-tone Input Power +5 dBm
V
CC
= +5 V
V
CC
= 5 V @ 700 碌A(chǔ) Typ.
C
TL1
, C
TL2
, C
TL4
, C
TL8
, C
TL16
,
Low
= 0 to 0.8 V @ 20 碌A(chǔ) Typ.
C
TL1
, C
TL2
, C
TL4
, C
TL8
, C
TL16
,
High
= 3.5 to 5.0 V @ 20 碌A(chǔ) Typ.
4. Input/output.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Frequency
Min.
Typ.
30
50
50
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Supply Voltage
Control Voltages
0.5鈥?.0 GHz
0.05 GHz
0.5鈥?.0 GHz
0.05 GHz
+25
+18
+42
+30
+29
+22
+48
+36
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.
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. 2/01A
1
1
2
