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 PRELIMINARY DATA SHEET
SKY12322-86: GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.5-2.5 GHz
Features
Attenuation 0.5 dB steps to 15.5 dB with high accuracy Single positive control (+3 to +5 V) for each bit Low DC power consumption Miniature low cost MSOP-10 plastic package
MSOP-10
Pin 10 0.118 (3.00 mm) 0.006 (0.15 mm) 0.193 (4.90 mm) 0.006 (0.15 mm)
Pin 1 Indicator Pin 1
Description
The SKY12322-86 is a 5 bit, single positive control GaAs IC FET digital attenuator in a low cost MSOP-10 package. This attenuator has an LSB of 0.5 dB and a total attenuation of 15.5 dB. The attenuator requires external DC blocking capacitors, positive supply voltage (VS) and five individual bit control voltages (V1-V5). The SKY12322-86 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include cellular radio, wireless data, and wireless local loop gain level control circuits.
0.034 (0.86 mm) 0.004 (0.10 mm) 0.0197 (0.500 mm) BSC 0.118 (3.00 mm) 0.006 (0.15 mm) 8-16 0-6 0.043 (1.09 mm) Max. 0.022 (0.55 mm) 0.006 (0.15 mm)
0.009 (0.23 mm) Ref.
0.006 (0.15 mm) Max. 0.002 (0.05 mm) Min.
Electrical Specifications at 25C (0, +3 V), (0, +5 V)
Parameter1 Insertion loss2 Frequency 0.5-1.0 GHz 1.0-2.5 GHz 0.5-1.0 GHz 1.0-2.5 GHz VSWR (I/O) 0.5-2.5 GHz Min. Typ. 2.0 3.0 15.5 (0.2 + 3% of attenuation setting in dB) (0.3 + 5% of attenuation setting in dB) 1.5:1 2.0:1 Max. 2.4 3.4 Unit dB dB dB dB dB
Attenuation range Attenuation accuracy3
Operating Characteristics at 25C (0, +5 V)
Parameter Switching characteristics4 Condition Rise, fall (10/90% or 90/10% RF) On, off (50% CTL to 90/10% RF) Video feedthru VS = +3 V VS = +5 V For two-tone input power +5 dBm VS = +3 V VS = +5 V 0.9-2.5 GHz 0.9-2.5 GHz 0.9-2.5 GHz 0.9-2.5 GHz Frequency Min. Typ. 150 300 70 +21 +27 +41 +45 Max. Unit ns ns mV dBm dBm dBm dBm
Input power for 1 dB compression Intermodulation intercept point (IP3)
Control voltages
VLOW = 0 to 0.2 V @ 20 A max. VHIGH = +3 V @ 100 A max. to +5 V @ 200 A max. VS = VHIGH 0.2 V
3. Attenuation referenced to insertion loss. 4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
1. All measurements made in a 50 system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/C.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * Nov. 25, 2003
1
PRELIMINARY DATA SHEET * SKY12322-86
Typical Performance Data (0, +3 V), (0, +5 V)
-0.5 -1.0 2.0 8 dB 1.8 1.6 15.5 dB 1.4 1.2 4 dB -3.0 0 0.5 1.0 1.5 2.0 2.5 1.0 0 0.5 1.0 1.5 2.0 2.5 Ins. Loss 0.5 dB 1 dB 2 dB
Insertion Loss (dB)
J1-J2 -2.0 -2.5
Frequency (GHz)
VSWR
-1.5
Frequency (GHz)
Insertion Loss vs. Frequency
0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 0 30 25
VSWR vs. Frequency
Deviation from Nominal Attenuation (dB)
Deviation from Nominal Insertion Phase (Deg.)
15.5 dB 20 15 10 5 0 -5 0.5 dB 1 dB 0 0.5 1.0 1.5 2 dB 4 dB 8 dB
8 dB 0.5 dB 2 dB
1 dB 4 dB 15.5 dB 0.5 1.0 1.5 2.0 2.5
-10 2.0 2.5
Frequency (GHz)
Frequency (GHz)
Attenuation Accuracy vs. Frequency
Attenuation Phase Accuracy vs. Frequency
Truth Table
V1 0.5 dB VHIGH 0 VHIGH VHIGH VHIGH VHIGH 0 V2 1 dB VHIGH VHIGH 0 VHIGH VHIGH VHIGH 0 V3 2 dB VHIGH VHIGH VHIGH 0 VHIGH VHIGH 0 V4 4 dB VHIGH VHigh VHIGH VHIGH 0 VHIGH 0 V5 8 dB VHIGH VHIGH VHIGH VHIGH VHIGH 0 0 Attenuation J1-J2 Reference I.L. 0.5 dB 1 dB 2 dB 4 dB 8 dB 15.5 dB max. atten.
Pin Out
J1
V1 V2 V3 V4 V5
1
0.5 dB 1 dB 2 dB 4 dB 8 dB
CBL
10
GND GND GND
CBL VS J2
2
9
3
8
4
7
5
10 k
VHIGH = +3 to +5 V (VS = VHIGH 0.2 V).
DC blocking capacitors (CBL) and biasing resistor must be supplied externally for positive voltage operation. CBL = 47 pF for operation >500 MHz.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 2
Nov. 25, 2003 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice.
6
PRELIMINARY DATA SHEET * SKY12322-86
Absolute Maximum Ratings
Characteristic RF input power Supply voltage Control voltage Operating temperature Storage temperature Value 1 W > 500 MHz 0/8 V 0.5 W @ 50 MHz 0/8 V +8 V -0.2 V, +8 V -40 C to +85 C -65 C to +150 C
Test Board
VS VS J1 J1 J2 J2
C1
R6
C2 SK40249 REV 2
Note: Exceeding these parameters may cause irreversible damage.
1 GND R1 V1 V2 U1 R2 R3 V3 R4 V4
EVAL BOARD AA101-86
C1, C2 = 47 pF
R5 V5
R1-R5 = 100 R6 = 10 K
V1
V2
V3
V4
V5
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * Nov. 25, 2003
3


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