Ordering number : EN8130B
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
Maximum Supply voltage
Symbol
VCC max
Conditions
Pin 1
Unit
7.0
V
VCC op
V
Circuit Voltages
V max
Circuit Current
I6
Pin 6 sink current
2
I7
Pin 7 sink current
2
Allowable Power Dissipation
Pd max
Pin 4, Pin 5
Ratings
Ta ≤ 85°C *
220
mA
mW
Operating Temperature
Topr
-20 to +85
°C
Storage Temperature
Tstg
-55 to +150
°C
*Mounted on PCB : 20.0mm × 10.0mm × 0.8 mm, paper phenol.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
71107 MS B8-8772,B8-8399 / 53007 MS IM / 92706 / 22505 TN PC No.8130-1/8
LA8120T
Recommended Operating Conditions at Ta = 25 °C
Parameter
Symbol
Recommended Supply Voltage
Operating Supply Voltage Range
Conditions
Ratings
Unit
VCC
Pin 1
5.0
V
VCC op
Pin 1
4.5 to 5. 5
V
Electrical Characteristics
AC Characteristics at Ta = 25 °C, VCC = 5.0 V
Parameter
Pin
Symbol
Ratings
Conditions
No.
min
typ
Circuit Current
Itotal
1
No Signal
*1
25
IF Input Frequency Range
f(in)
2, 3
fc : -3 dB
*1
30
Noise Figure
NF
6, 7
V4 = 3.0 V,
Unit
max
30
35
mA
100
MHz
Pin 5 : VCC
*2
5
dB
Pin 5 : GND
*2
6
dB
Pin 5 : OPEN
*2
8
dB
f = 45 MHz
V4 = 3.0 V,
f = 45 MHz
V4 = 3.0 V,
f = 45 MHz
Intermodulation
IM3
Total Amplifier Gain
G(AGC1)
G(AGC2)
G(AGC3)
AGC Range 1
GR1
6/2, 3
f1 = 44 MHz, f2 = 45 MHz
7/2, 3
Input = 90 dBµ/Tone, Output = 104 dBµ/Tone
6/2, 3
V4 = 3.0 V,
7/2, 3
f = 45 MHz
6/2, 3
V4 = 3.0 V,
7/2, 3
f = 45 MHz
*1
50
Pin 5 : VCC
*1
45.5
48
50.5
dB
Pin 5 : GND
*1
41.5
44
46.5
dB
Pin 5 : OPEN
*1
33.5
36
38.5
dB
*1
40
6/2, 3
V4 = 3.0 V,
7/2, 3
f = 45 MHz
6/2, 3
IF Output Level < ±1 dB, f = 45 MHz
dBc
dB
7/2, 3
IF Output Level
VO(IF)
Output Level, f = 45 MHz
*1
AGC Control Max. Voltage
V4H
6, 7
4
Gain Max.
*1
2.5
1.0
3
V
AGC Control Min. Voltage
V4L
4
Gain Min.
*1
0
0.5
V
Input impedance
Zin
2, 3
V4 = 0 V, f = 45 MHz
*3
1 // 4.9
Vp-p
kΩ // pF
*1 : Measurement circuit 1, *2 : Measurement circuit 2, *3 : Measurement circuit 3
Package Dimensions
unit : mm (typ)
3245B
3.0
0.5
3.0
4.9
8
2
0.65
0.125
1.1MAX
(0.85)
0.25
0.08
1
(0.53)
SANYO : MSOP8(150mil)
No.8130-2/8
LA8120T
Pin Functions
Pin Number
Pin Name
1
VCC
2
IF Input
Equivalent Circuit
Bias
3
1kΩ
1kΩ
2
3
AGC Control
4
VCC
1kΩ
4
5
Gain Control Switch
VCC
80kΩ
10kΩ
5
6
Driver Output
VCC
7
20Ω
6
20Ω
7
8.0mA
8
8.0mA
GND
Block Diagram
VCC
1
8
Gnd
IF Input1
2
7
Driver Output1
IF Input2
3
6
Driver Output2
AGC Control
4
5
Gain Control Switch
AGC
No.8130-3/8
LA8120T
LA8120T Gain, Measurement Circuit 1
VCC
1
8
2
7
1000pF
TOKO
200 Ω
617DB-1010 B4F
SG
SG
1000pF
Spectrum
Analyzer
1000pF
200 Ω
3
51 Ω
6
1000pF
1000pF
AGC
4
AGC Voltage
VCC
5
1000pF
1000pF
SW
LA8120T Noise Figure Measurement Circuit 2
VCC
1
8
2
7
1000pF
TOKO
Noise Figure
Analyzer (Source)
200 Ω
617DB-1010 B4F
1000pF
Noise Figure
Analyzer (Sense)
1000pF
200 Ω
3
51 Ω
6
1000pF
1000pF
AGC
4
AGC Voltage
VCC
5
1000pF
1000pF
SW
LA8120T Input Impedance Measurement Circuit 3
VCC
1
8
2
7
1000pF
Network Analyzer
1000pF
200Ω
51Ω
200Ω
51Ω
1000pF
51Ω
3
6
1000pF
1000pF
AGC
4
AGC Voltage
VCC
5
1000pF
1000pF
SW
LA8120T Intermodulation Measurement Circuit 4
VCC
1
8
2
7
1000pF
TOKO
SG
SG
Input
617DB-1010 B4F
1000pF
200 Ω
Output
200 Ω
51 Ω
1000pF
3
Spectrum
Analyzer
6
1000pF
1000pF
AGC
4
AGC Voltage
1000pF
VCC
5
1000pF
SW
No.8130-4/8
LA8120T
Gain - Vagc Characteristic
70
60
50
VCC = 5.0 V
Frequency = 45 MHz
Circuit1
35
PIN5:GND
C
PIN5:VC
40
VCC = 5.0 V
Frequency = 45 MHz
Circuit2
30
30
20
10
-10
20
PI
N5
15
10
:V
CC
5:G
PIN
0
25
ND
N
PE
:O
Noise Figure - dB
PIN5:OPEN
N5
PI
Voltage Gain - dB
Noise Figure - Gain Characteristic
40
-20
5
-30
-40
-0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
10
4.0
15
20
Vagc - V
25
30
35
40
45
50
Voltage Gain - dB
Gain - Frequency Characteristic
70
60
VCC = 5.0 V
Vagc = 2.5 V
Circuit2
Voltage Gain - dB
50
PIN5:VCC
PIN5:GND
40
PIN5:OPEN
30
20
10
0
10
20
30
40
50
60
70
80
90
100
Frequency - MHz
Output
Vagc
-20
Output / Tone - dBm
Intermodulation Characteristic
-30
Out
put
3.0
0
2.7
-10
2.4
-20
2.1
-40
1.8
Vag
c
-50
1.5
-60
1.2
-70
0.9
IM3
Vagc - V
Output / Tone - dBm
-10
VCC = 5.0 V, PIN5 : OPEN
Frequency = 44 MHz, 45 MHz, Circuit4
-30
3.0
VCC = 5.0 V, PIN5 : GND
Frequency = 44 MHz, 45 MHz, Circuit4
2.7
Output
Vagc
put
Out
2.4
2.1
-40
1.8
Vag
c
-50
1.5
-60
1.2
-70
0.9
IM3
-80
0.6
-80
0.6
-90
0.3
-90
0.3
-100
-60
-55
-50
-45
-40
-35
-30
-25
-20
-100
-60
0
-15
Input / Tone - dBm
-55
-50
-45
-40
-35
Vagc - V
Intermodulation Characteristic
0
-30
-25
-20
0
-15
Input / Tone - dBm
Intermodulation Characteristic
-10
-20
Output / Tone - dBm
3.0
VCC = 5.0 V, PIN5 : VCC
Frequency = 44 MHz, 45 MHz, Circuit4
Output
2.7
2.4
put
Out
-30
2.1
-40
1.8
1.5
-50
Vagc
-60
-70
1.2
0.9
IM3
-80
0.6
-90
0.3
-100
-60
-55
-50
-45
-40
-35
-30
-25
-20
Vagc - V
0
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 Ω/50 Ω)
0
-15
Input / Tone - dBm
No.8130-5/8
LA8120T
Gain - Vagc Characteristic
60
50
Voltage Gain - dB
40
30
20
10
25
Voltage Gain - dB
40
VCC = 5.0 V
PIN5 : GND, Frequency = 45 MHz
Circuit1
0
20
10
0
-10
85
-10
30
25
50
VCC = 5.0 V
PIN5 : OPEN, Frequency = 45 MHz
Circuit1
-20
20
-20
-30
-40
-0.5
0
20
60
Gain - Vagc Characteristic
70
85
70
-30
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-40
-0.5
4.0
0
0.5
1.0
Vagc - V
1.5
2.0
2.5
3.0
3.5
4.0
Vagc - V
Gain - Vagc Characteristic
70
60
50
VCC = 5.0 V
PIN5 : VCC, Frequency = 45 MHz
Circuit1
30
25
20
10
0
85
Voltage Gain - dB
40
20
-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
Noise Figure - Gain Characteristic
35
30
Noise Figure - dB
Noise Figure - Gain Characteristic
40
PIN5 : OPEN, Frequency = 45 MHz
Circuit2
35
25
25
20
20
15
25
5
5
20
25
30
35
40
45
50
Voltage Gain - dB
25
15
10
15
85
20
20
10
0
10
PIN5 : GND, Frequency = 45 MHz
Circuit2
30
85
Noise Figure - dB
40
0
10
15
20
25
30
35
40
45
50
Voltage Gain - dB
Noise Figure - Gain Characteristic
40
35
PIN5 : VCC, Frequency = 45 MHz
Circuit2
Noise Figure - dB
30
25
85
20
20
25
15
10
5
0
10
15
20
25
30
35
40
45
50
Voltage Gain - dB
No.8130-6/8
LA8120T
Gain - Frequency Characteristic
70
VCC = 5.0 V
PIN5 : OPEN
Vagc = 2.5 V
Circuit2
65
60
VCC = 5.0 V
PIN5 : GND
Vagc = 2.5 V
Circuit2
65
60
55
Voltage Gain - dB
Voltage Gain - dB
Gain - Frequency Characteristic
70
50
45
40
25
20
35
85
30
55
50
45
20
40
85
25
35
30
25
25
20
10
20
30
40
50
60
70
80
90
20
10
100
20
30
Frequency - MHz
40
50
60
70
80
100
90
Frequency - MHz
Gain - Frequency Characteristic
70
VCC = 5.0 V
PIN5 : VCC
Vagc = 2.5 V
Circuit2
65
Voltage Gain - dB
60
55
50
25
20
45
85
40
35
30
25
20
10
20
30
40
50
60
70
80
90
100
Frequency - MHz
Intermodulation Characteristic
-10
-40
-50
25
-60
IM3
-70
VCC = 5.0 V, PIN5 : GND
Frequency = 44 MHz, 45 MHz, Circuit4
-20
20
85
-30
-10
Output
20
Output / Tone - dBm
-20
Intermodulation Characteristic
0
VCC = 5.0 V, PIN5 : OPEN
Frequency = 44 MHz, 45 MHz, Circuit4
25
Output / Tone - dBm
0
85
-80
-30
20
85
Output
25
-40
-50
20
-60
25
85
IM3
-70
-80
-90
-90
-100
-60
-100
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
Input / Tone - dBm
-55
-50
-45
-40
-35
-30
-25
-20
-15
Input / Tone - dBm
Intermodulation Characteristic
0
-10
VCC = 5.0 V, PIN5 : VCC
Frequency = 44 MHz, 45 MHz, Circuit4
Output / Tone - dBm
-20
Output
20
25
85
-30
-40
20
25
85
-50
-60
-70
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 Ω/50 Ω)
IM3
-80
-90
-100
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
Input / Tone - dBm
No.8130-7/8
LA8120T
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the authorities concerned in accordance with the above law.
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mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise,
without the prior written consent of SANYO Semiconductor Co.,Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of July, 2007. Specifications and information herein are subject
to change without notice.
PS No.8130-8/8