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PDF LA8120T Data sheet ( Hoja de datos )

Número de pieza LA8120T
Descripción AGC Amplifier
Fabricantes Sanyo Electric 
Logotipo Sanyo Electric Logotipo



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No Preview Available ! LA8120T Hoja de datos, Descripción, Manual

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Ordering number : ENN8130
LA8120T Monolithic Linear IC
AGC Amplifier with Step Gain Control
Overview
The LA8120T bipolar monolithic IC is an AGC amplifier with driver amplifier for analog-to-digital converters. It is ideally
suited for use with receiver systems that receive QPSK and/or QAM data transmissions.
Functions
IF AGC control
IF AGC amplifier
IF Step Gain Controlled Amplifier
Driver amplifier
Applications
Digital CATV
Cable modem receivers
IP Telephony receivers
Specitications
Absolute Maximum Ratings at Ta = 25 °C
Parameter
Symbol
Conditions
Maximum Supply voltage
Circuit Voltages
VCC max
V max
Pin 1
Pin 4, Pin 5
Circuit Current
Allowable Power Dissipation
I6
I7
Pd max
Pin 6 sink current
Pin 7 sink current
Ta 85°C
Operating Temperature
Topr
Storage Temperature
Tstg
*Mounted on PCB (paper phenol 20.0 × 10.0 × 0.8 t mm)
Recommended Operating Conditions at Ta = 25 °C
Parameter
Recommended Supply Voltage
Operating Supply Voltage Range
Symbol
VCC
VCC op
Pin 1
Pin 1
Conditions
Ratings
7.0
VCC op
2
2
220*
-20 to +85
-55 to +150
Unit
V
V
mA
mW
°C
°C
Ratings
5.0
4.5 to 5. 5
Unit
V
V
22505 TN PC No.8130-1/8

1 page




LA8120T pdf
www.DataSheet4U.com
LA8120T
Gain - Vagc Characteristic
70
VCC = 5.0 V
60 Frequency = 45 MHz
50 Circuit1
PIN5:GND
PIN5:VCC
40 PIN5:OPEN
30
20
10
0
Noise Figure - Gain Characteristic
40
VCC = 5.0 V
35 Frequency = 45 MHz
Circuit2
30
25
20
15
PIN5:VCC
-10
-20
-30
-40
-0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Vagc - V
10
5
0
10 15 20 25 30 35 40 45
Voltage Gain - dB
Gain - Frequency Characteristic
70 VCC = 5.0 V
Vagc = 2.5 V
60 Circuit2
50
50 PIN5:VCC
PIN5:GND
40
PIN5:OPEN
30
20
10
0
10 20 30 40 50 60 70 80 90 100
Frequency - MHz
Intermodulation Characteristic
0 VCC = 5.0 V, PIN5 : OPEN
3.0
-10 Frequency = 44 MHz, 45 MHz, Circuit4
Output 2.7
-20 Vagc
2.4
-30 Output
-40
-50
Vagc
2.1
1.8
1.5
-60 1.2
-70 IM3 0.9
-80 0.6
-90 0.3
-100
0
-60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Input / Tone - dBm
Intermodulation Characteristic
0 VCC = 5.0 V, PIN5 : VCC
3.0
-10 Frequency = 44 MHz, 45 MHz, Circuit4
Output 2.7
-20 Output
-30
2.4
2.1
-40 1.8
-50 1.5
-60
Vagc
1.2
-70 IM3 0.9
-80 0.6
-90 0.3
-100
0
-60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Input / Tone - dBm
Intermodulation Characteristic
0 VCC = 5.0 V, PIN5 : GND
-10 Frequency = 44 MHz, 45 MHz, Circuit4
Output
-20 Vagc
-30 Output
3.0
2.7
2.4
2.1
-40 1.8
-50
Vagc
1.5
-60 1.2
-70 IM3 0.9
-80 0.6
-90 0.3
-100 0
-60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Input / Tone - dBm
The vertical axis (Output/Tone) on this graph shows
the values displayed by the spectrum analyzer for
circuit 4.
The actual output power for the corresponding pins
is given by the following formula.
{output power [dBm]}=
{displayed value [dBm]}+10 log (250 /50 )
No.8130-5/8

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