AA264-87
器件描述：GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5-2 GHz
器件厂商：ALPHA [Alpha Industries]
文件大小：244.94KB，共5页
Sponsor by e络盟器件资料摘要：
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator
2 dB LSB Positive Control 0.5–2 GHz
Features
a73 Attenuation 2 dB Steps to 30 dB
with High Accuracy
a73 Single Positive Control for Each Bit
a73 Low DC Power Consumption
a73 Small Low Cost TSSOP-16 Plastic
Package
TSSOP-16
AA264-87
0.173 (4.40 mm)
± 0.004 (0.10 mm)
0.197 (5.00 mm)
± 0.004 (0.10 mm)
0.252 (6.4 mm)
BSC
PIN 16
PIN 1
INDICATOR
PIN 1
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.047 (1.20 mm)
MAX.
0.035 (0.90 mm)
+ 0.006 (0.15 mm) /
-0.004 (-0.10 mm)
0.0256 (0.65 mm)
BSC
0.009 (0.22 mm) REF.
R 0.004 (0.09 mm)
MIN.
0.024
(0.60 mm)
± 0.006
(0.15 mm)
Description
The AA264-87 is a 4 bit, single positive control GaAs IC
FET digital attenuator in a low cost TSSOP-16 package.
The attenuator requires external DC blocking capacitors,
positive supply voltage (V
S
) and four individual positive
control voltages (V
1
–V
4
). The AA264-87 is particularly
suited where high attenuation accuracy, low insertion loss
and low intermodulation products are required. Typical
applications include base station, wireless data and
wireless local loop gain control circuits.
Parameter
1
Condition Frequency Min. Typ. Max. Unit
Insertion Loss 0.5–1.0 GHz 1.6 2.0 dB
0.5–2.0 GHz 1.8 2.4 dB
Attenuation Range 30 dB
Attenuation Accuracy
2
0.5–1.0 GHz ± (0.2 + 3% of
Attenuation Setting in dB) dB
0.5–2.0 GHz ± (0.3 + 5% of
2–24 dB Setting) dB
0.5–2.0 GHz ± (0.3 + 6% of
26–30 dB Setting) dB
VSWR (I/O)
3
0.5–0.8 GHz 1.8:1 2.2:1
0.8–2.0 GHz 1.5:1 2.0:1
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF) 150 ns
On, Off (50% CTL to 90/10% RF) 300 ns
Video Feedthru 70 mV
Input Power for 1 dB Compression V
S
= +3 V 0.5–2.0 GHz +15 +21 dBm
V
S
= +5 V 0.5–2.0 GHz +21 +27 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
V
S
= +3 V 0.5–2.0 GHz +36 +44 dBm
V
S
= +5 V 0.5–2.0 GHz +37 +45 dBm
Control Voltages V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
V
S
= V
High
± 0.2 V
Electrical Specifications at -40°C to +85°C (0, +5 V)
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
3. Input/output.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator
2 dB LSB Positive Control 0.5–2 GHz
Features
a73 Attenuation 2 dB Steps to 30 dB
with High Accuracy
a73 Single Positive Control for Each Bit
a73 Low DC Power Consumption
a73 Small Low Cost TSSOP-16 Plastic
Package
TSSOP-16
AA264-87
0.173 (4.40 mm)
± 0.004 (0.10 mm)
0.197 (5.00 mm)
± 0.004 (0.10 mm)
0.252 (6.4 mm)
BSC
PIN 16
PIN 1
INDICATOR
PIN 1
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.047 (1.20 mm)
MAX.
0.035 (0.90 mm)
+ 0.006 (0.15 mm) /
-0.004 (-0.10 mm)
0.0256 (0.65 mm)
BSC
0.009 (0.22 mm) REF.
R 0.004 (0.09 mm)
MIN.
0.024
(0.60 mm)
± 0.006
(0.15 mm)
Description
The AA264-87 is a 4 bit, single positive control GaAs IC
FET digital attenuator in a low cost TSSOP-16 package.
The attenuator requires external DC blocking capacitors,
positive supply voltage (V
S
) and four individual positive
control voltages (V
1
–V
4
). The AA264-87 is particularly
suited where high attenuation accuracy, low insertion loss
and low intermodulation products are required. Typical
applications include base station, wireless data and
wireless local loop gain control circuits.
Parameter
1
Condition Frequency Min. Typ. Max. Unit
Insertion Loss 0.5–1.0 GHz 1.6 2.0 dB
0.5–2.0 GHz 1.8 2.4 dB
Attenuation Range 30 dB
Attenuation Accuracy
2
0.5–1.0 GHz ± (0.2 + 3% of
Attenuation Setting in dB) dB
0.5–2.0 GHz ± (0.3 + 5% of
2–24 dB Setting) dB
0.5–2.0 GHz ± (0.3 + 6% of
26–30 dB Setting) dB
VSWR (I/O)
3
0.5–0.8 GHz 1.8:1 2.2:1
0.8–2.0 GHz 1.5:1 2.0:1
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF) 150 ns
On, Off (50% CTL to 90/10% RF) 300 ns
Video Feedthru 70 mV
Input Power for 1 dB Compression V
S
= +3 V 0.5–2.0 GHz +15 +21 dBm
V
S
= +5 V 0.5–2.0 GHz +21 +27 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
V
S
= +3 V 0.5–2.0 GHz +36 +44 dBm
V
S
= +5 V 0.5–2.0 GHz +37 +45 dBm
Control Voltages V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
V
S
= V
High
± 0.2 V
Electrical Specifications at -40°C to +85°C (0, +5 V)
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
3. Input/output.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.