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ARA1400S12 Datasheet

  • ARA1400S12

  • CATV Reverse Amplifier with step Attenuator

  • 8頁

  • ANADIGICS   ANADIGICS

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A
FEATURES
路
路
路
路
路
路
Low cost integrated monolithic GaAs
amplifier and step attenuator with output
disconnect switch.
Meets DOCSIS distortion requirements at
+60 dBmV
Frequency range: 5 聳 100 MHz
Attenuation Range: 0 聳 56 dB, variable in
4 dB steps
5 Volt operation
Low distortion & Low noise figure
APPLICATIONS
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路
路
MCNS/DOCSIS Compliant Cable Modems
CATV Interactive Set-Top Box
Telephony over Cable Systems
ARA1400S12
CATV Reverse Amplifier with Step Attenuator
Advanced Product Information
Rev. 2
28
1
S12
28 PIN SSOP PACKAGE
DESCRIPTION
The ARA1400S12 is a GaAs IC designed to perform the reverse path amplification and output level control
functions in a CATV Set-Top Box or Cable Modem. It incorporates a digitally controlled precision step
attenuator that is preceded by an ultra low noise amplifier stage, and followed by an ultra-linear output driver
amplifier. It is capable of meeting the MCNS/DOCSIS harmonic distortion specifications while only requiring
a single polarity +5V supply. This
part is a single ended design
that does not require an output
ABSOLUTE MAXIMUM RATINGS
balun to achieve 聳52 dBc 2
nd
harmonic performance at +60
PARAMETER
PARAMETER
dBmV output levels. Both the
V
DD
(P INS 4,12,17)
9
VD C
input and output are matched to
75 ohms.
The precision
V
RFIN
(P INS 10, 26)
0 to -3
VD C
attenuator provides up to 56 dB
of attenuation in 4 dB
ATT
IN
(3) ATT
OUT
(28)V
5
VD C
increments. The ARA1400S12
V
ISET
(P INS 11, 27)
2
VD C
is supplied in a 28-pin SSOP
package featuring a thermal heat
RF Input Voltage (P INS 10, 26)*
+ 60
dB mV
slug on the bottom of package.
Storage T mperature
e
- 55 to +200
擄C
Soldering this heat slug to the
ground plane of the PC board
S olderi ng T mperature
e
260
擄C
ensures the lowest possible
S olderi ng Ti me
5
S ec
thermal resistance for the device
resulting in a long MTF.
Operati ng C ase T mperature
e
0 to + 85
擄C

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