Skyworks Solutions, Inc. [781] 376-3000 •Fax [781] 376-3100 •Email sales@skyworksinc.com •www.skyworksinc.com 1
Specifications subject to change without notice. 3/01A
GaAs IC 5 Bit Digital Attenuator With
Serial-to-Parallel Driver DC–2 GHz
Features
■Positive Voltage Operation (+5 V)
■MLF 5 x 5 mm Leadless Package
■Integrated Silicon Serial-to-Parallel Driver
■Attenuation 0.5 dB Steps to 15.5 dB
MLF 5 x 5 (-310)
AA107-310
Description
The AA107-310 is a GaAs FET IC 5 bit digital attenuator
with a serial-to-parallel driver packaged in a 32 leadless
exposed pad plastic package. 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 and RF data and
wireless local loop gain control circuits.
Parameter1Condition Frequency2Min. Typ. Max. Unit
Insertion Loss3DC–1.0 GHz 1.4 1.7 dB
DC–2.0 GHz 1.7 2.2 dB
Attenuation Range4, 5 15.5 dB
Attenuation Accuracy4, 5 DC–1.0 GHz ± (0.2 + 3% of
Attenuation Setting in dB) dB
DC–2.0 GHz ± (0.4 + 3% of
Attenuation Setting in dB) dB
VSWR (I/O) DC–2.0 GHz 1.4:1 1.8:1
Switching Characteristics6Rise, Fall (10/90% or 90/10% RF) 50 ns
On, Off (50% CTL to 90/10% RF) 100 ns
Video Feedthru 50 mV
Input Power for 1 dB Compression 0.50–2.0 GHz +24 +29 dBm
0.05 GHz +17 +22 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm 0.50–2.0 GHz +44 +50 dBm
0.05 GHz +35 +40 dBm
Control Voltages VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = -5 V @ 300 µA Max.
Electrical Specifications at 25°C (VCC = +5 V)
0.001
(0.025 mm)
0.039 (1.00 mm) MAX.
SEATING
PLANE
12˚ MAX.
0.197 (5.00 mm) BSC
0.197
(5.00 mm)
BSC
1
32
0.187
(4.75 mm) BSC
0.187
(4.75 mm)
BSC
PIN 1
INDICATOR
0.122 (3.10 mm)
± 0.006 (0.15 mm)
0.122 (3.10 mm)
± 0.006 (0.15 mm)
32
1
0.138 (3.50 mm) REF.
0.138
(3.50 mm) REF.
0.019 (0.50 mm) BSC
Preliminary
Parameter Symbol Min. Typ. Max. Unit
Input Voltage High VIH (1) 3.5 5.0 V
Input Voltage Low VIL (0) 0 0.5 V
Input Leakage Current IL±0.5 µA
Quiescent Current ICC 500 µA
Supply Voltages VCC 5.0 V
DC Electrical Characteristics at 25°C (VCC = +5 V)
1. All measurements made in a 50 Ωsystem, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/°C.
4. Attenuation value referenced above insertion loss.
5. Exposed pad must be connected to RF ground to obtain specified attenuation.
6. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver DC–2 GHz AA107-310
2Skyworks Solutions, Inc. [781] 376-3000 •Fax [781] 376-3100 •Email sales@skyworksinc.com •www.skyworksinc.com
Specifications subject to change without notice. 3/01A
Truth Table
J1–J2
Reset 0.5 dB 1 dB 2 dB 4 dB 8 dB Attenuation
1 0 0 0 0 0 Insertion Loss
1 1 0 0 0 0 0.5 dB
1 0 1 0 0 0 1 dB
1 0 0 1 0 0 2 dB
1 0 0 0 1 0 4 dB
1 0 0 0 0 1 8 dB
1 1 1 1 1 1 15.5 dB
0 X X X X X Insertion Loss
Characteristic Value
Supply Voltage (VCC) -0.5 to +6 V
Input Voltage (VI) -0.5 – VCC + 0.5 V
Power Dissipation (PD) 500 mW
Storage Temperature (TST) -65°C to +125°C
Operating Temperature (TOP) -40°C to +85°C
Absolute Maximum Ratings
Typical Performance Data (VCC = +5 V)
-2.0
-1.5
-1.0
-0.5
0
0 0.5 1.0 1.5 2.0
Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
-1.0
-0.8
-0.6
-0.4
0.2
-0.2
0
0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy vs. Frequency
0.5 1.0 1.5 2.0
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0 0.5 1.0 1.5 2.0
VSWR
Frequency (GHz)
VSWR vs. Frequency
1.0
1.1
1.2
1.3
1.4
1.5
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Serial Data Input
VIL (0) = 0 to 0.5 V.
VIH (1) = 3.5 to 5 V.
X = Don’t Care.
Dimensions in inches (mm).
0.122
(3.10 mm)
SQ.
0.020 (0.50 mm)
0.020
(0.50 mm)
0.020 (0.50 mm)
0.020
(0.50 mm)
0.013 (0.33 mm)
Surface Mount Land Pattern
5 x 5 mm MLF 32 Lead
GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver DC–2 GHz AA107-310
Skyworks Solutions, Inc. [781] 376-3000 •Fax [781] 376-3100 •Email sales@skyworksinc.com •www.skyworksinc.com 3
Specifications subject to change without notice. 3/01A
J1
GND 0.025 µF
0.01 µF
LE
SCK
SDA
GND
GND
GND
GND
GND
GND
GND
GND
GND
Pin 1
Pin 32
GND
GND
GND
GND
GND
J2
GND
GND
GND
GND
GND
GND
RSTSOUT
VCC
C2
C1
VSS
0.01 µF
Pin Out Pin Symbol Function
1S
OUT Serial Data Output
2–4 GND Ground
5J
1RF Input/Output
6–19 GND Ground
20 J2RF Input/Output
21–23 GND Ground
24 RST Reset
25 LE Latch Enable
26 SDA Serial Data Input
27 SCK Serial Clock Input
28 VSS Low Output Voltage Level
29 GND Ground
30 C2Charge Pump Capacitor
31 C1Charge Pump Capacitor
32 VCC Supply Voltage
Parameter Symbol Min. Typ. Max. Unit
LE Setup Time T115 ns
SDA Setup Time T215 ns
SDA Hold Time T310 ns
LE Hold Time T410 ns
Clock Period T560 ns
Timing Diagram
LE
SCK
SDA
T1T2T3T5T4
