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PDF LA7795T Data sheet ( Hoja de datos )

Número de pieza LA7795T
Descripción AGC Amplifier
Fabricantes Sanyo Semiconductor 
Logotipo Sanyo Semiconductor Logotipo



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No Preview Available ! LA7795T Hoja de datos, Descripción, Manual

Ordering number : ENN8268
LA7795T Monolithic Linear IC
AGC Amplifier with Step Gain Control
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The LA7795T 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
190*
-20 to +85
-55 to +150
Unit
V
V
mA
mW
°C
°C
Ratings
5.0
4.5 to 5. 5
Unit
V
V
33005 TN PC No.8268-1/8

1 page




LA7795T pdf
LA7795T
Gain - Vagc Characteristic
70
VCC = 5.0 V
60 Frequency = 45 MHz
PIN5:VCC
50 Circuit1
PIN5:GND
40 PIN5:OPEN
30
20
10
0
Noise Figure - Gain Characteristic
40
VCC = 5.0 V
Frequency = 45 MHz
35
Circuit2
30
25
20
15
-10
-20
-30
-40
-0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
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Vagc - V
Gain - Frequency Characteristic
70
VCC = 5.0 V, Vagc = 2.5 V
Circuit2
60
PIN5:VCC
10
5
0
10 15 20 25 30 35 40 45 50 55 60 65 70
Voltage Gain - dB
50 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
-10 Frequency = 44 MHz, 45 MHz, Circuit4
Vagc
-20 Output
-30
Output
3.0
2.7
2.4
2.1
-40 Vagc 1.8
-50 1.5
-60 1.2
-70
IM3
0.9
-80 0.6
-90 0.3
-100
0
-70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15
Input / Tone - dBm
Intermodulation Characteristic
0 VCC = 5.0 V, PIN5 : VCC
-10 Frequency = 44 MHz, 45 MHz, Circuit4
3.0
2.7
-20
Output
2.4
-30 2.1
-40 1.8
-50
Vagc
-60
-70 IM3
1.5
1.2
0.9
-80 0.6
-90 0.3
-100
0
-70 -65 -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
Vagc
-20 Output
-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
-70 -65 -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.8268-5/8

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