LA7796T-TLM-E [ONSEMI]
IC,AUTOMATIC GAIN CONTROL (AGC) CIRCUIT,TSSOP,8PIN,PLASTIC;
| 型号： | LA7796T-TLM-E |
| 厂家： | 
ONSEMI |
| 描述： | IC,AUTOMATIC GAIN CONTROL (AGC) CIRCUIT,TSSOP,8PIN,PLASTIC 光电二极管 |
| 文件： | 总8页 (文件大小：107K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA1145A
Monolithic Linear IC
For Digital CATV/Cable Modem Receiver
LA7796T
AGC Amplifier
Overview
LA7796T is an AGC amplifier. It is ideally suited for use with Digital CATV, Cable modem receiver and IP Telephony
receiver.
Functions
• IF AGC control
• IF AGC amplifier
• IF Step Gain Controlled Amplifier
• Driver amplifier
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
max
Conditions
Ratings
Unit
V
Maximum Supply Voltage
V
Pin 1
7.0
op
2
CC
Circuit Voltages
Circuit Current
V max
I6
Pin 4 , Pin 5
V
V
CC
Pin 6 sink current
Pin 7 sink current
Ta ≤ 85°C
mA
mA
mW
°C
I7
2
Allowable Power Dissipation
Operating Temperature Range
Storage Temperature Range
Pd max
Topr
Tstg
220
-20 to 85
-55 to 150
°C
Specified board: 20.0mm × 10.0mm ¯ 0.8mm, glass epoxy board.
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.
91008 MS PC/31208 MS 20070626-S00009 No.A1145-1/8
LA7796T
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended Supply Voltage
Operating Supply Voltage Range
V
Pin 1
Pin 1
5.0
CC
V
op
4.5 to 5.5
V
CC
Electrical Characteristics at Ta = 25°C, V
= 5V
CC
Ratings
typ
Pin
Test
Parameter
Symbol
Conditions
Unit
No.
1
circuit
min
max
35
Circuit Current
I
No Signal
fc : -3dB
1
1
2
25
30
30
mA
MHz
dB
total
IF Input Frequency Range
Noise Figure
f(in)
NF
2,3
6,7
100
V4 = 3.0V,
Pin5: V
CC
3
4
5
f = 45MHz
V4 = 3.0V,
f = 45MHz
V4 = 3.0V,
f = 45MHz
V4 = 3.0V,
Pin5: GND
2
2
1
dB
dB
dB
Pin5: OPEN
Intermodulation
IM3
6/2,3
7/2,3
50
f1 = 44MHz, f2 = 45MHz,
Output = 104dBμ each
Total Amplifier Gain
G
6/2,3
7/2,3
6/2,3
7/2,3
6/2,3
7/2,3
6/2,3
7/2,3
6,7
V4 = 3.0V,
f = 45MHz
V4 = 3.0V,
f = 45MHz
V4 = 3.0V,
f = 45MHz
Pin5: V
CC
1
1
1
1
45.5
40.5
37.5
40
48
43
40
50.5
45.5
42.5
dB
dB
dB
dB
(AGC1)
G
Pin5: GND
(AGC2)
G
Pin5: OPEN
(AGC3)
GR
AGC Range
IF Output Level < 1dB
f = 45MHz
IF Output Level
V
(IF)1
4H
Output Level, f = 45MHz
1
1
1
3
1.0
Vp-p
V
O
V
AGC Control Max. Voltage
AGC Control Min. Voltage
Input Impedance
4
4
Gain Max.
2.5
0
3
V
Gain Min.
0.5
V
4L
Zin
2,3
V4 = 0V, f = 45MHz
1//6.5
kΩ//pF
Package Dimensions
unit : mm (typ)
3245B
3.0
8
1
2
(0.53)
0.65
0.25
0.125
SANYO : MSOP8(150mil)
No.A1145-2/8
LA7796T
Block Diagram
V
1
2
3
4
8
7
6
5
GND
CC
IF input1
IF input2
Driver output1
Driver output2
Gain control switch
AGC
AGC control
(Caution) Be sure to connect pin 5 to either V
or GND or keep it open.
CC
Test Circuit1
1
8
V
1000pF
CC
1000pF
TOKO
617DB-1010 B4F
200Ω
2
7
Spectrum Analyzer
1000pF
1000pF
Vin
1000pF
Zo=50Ω
200Ω 51Ω
3
6
AGC
4
5
V
CC
AGC Voltage
1000pF
1000pF
SW
Output Voltage is divided by 50Ω / (200+50)Ω
Test Circuit2
1
8
V
1000pF
CC
1000pF
TOKO
617DB-1010 B4F
200Ω
Noise Figure
Noise Figure
Analyzer: Source
2
3
7
Analyzer: Sence
1000pF
1000pF
1000pF
200Ω 51Ω
6
AGC
4
5
V
CC
AGC Voltage
1000pF
1000pF
SW
Test Circuit3
1
8
7
6
5
V
1000pF
CC
1000pF
200Ω 51Ω
200Ω 51Ω
Network Analyzer
2
3
1000pF
1000pF
51Ω
1000pF
AGC
4
V
CC
AGC Voltage
1000pF
1000pF
SW
No.A1145-3/8
LA7796T
Pin Function
Pin No.
Function
Equivalent circuit
1
V
CC
2
3
IF input.
V
CC
Bias
2
3
4
AGC control.
V
CC
10kΩ
4
5
Gain control Switch.
V
CC
35kΩ
10kΩ
5
35kΩ
6
7
Driver output.
V
CC
20Ω
6
7
20Ω
8.0mA
8.0mA
8
GND
No.A1145-4/8
LA7796T
Gain -- Vagc Characteristic
Noise Figure -- Gain Characteristic
60
50
40
30
20
10
35
30
V
= 5.0V
f = 45MHz
Circuit 1
V
= 5.0V, f = 45MHz
CC
CC
Pin5 : V
CC
Pin5 : GND
Circuit 2
Pin5 : OPEN
25
20
15
10
0
–
10
–
–
–
20
30
40
5
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
15
20
25
30
35
40
45
50
55
Vagc – V
Voltage Gain – dB
Gain -- Frequency Characteristic
60
50
40
V
= 5.0V, Vagc = 2.5V
CC
Circuit 1
Pin5 : V
CC
Pin5 : GND
30
20
10
0
10
20
30
40
50
60
70
80
90
100
3
Frequency – MHz
Intermodulation Characteristic
Intermodulation Characteristic
= 5.0V, Pin5 : GND
0
0
10
20
30
40
50
60
70
80
90
3
V
= 5.0V, Pin5 : OPEN
f = 44MHz, 45MHz, Circuit 1
V
CC
CC
–
–
–
–
–
–
–
–
–
–
2.7
2.7
2.4
2.1
1.8
1.5
1.2
10
20
30
40
50
60
70
80
90
f = 44MHz, 45MHz, Circuit 1
Output
Output
Vagc
Vagc
–
–
–
–
–
–
–
–
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.9
0.6
0.3
0
0.3
0
–
–
100
–
100
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
20 15
70
65
60
55
50
45
40
35
30
25
20
15
70
65
60
55
50
45
40
35
30
25
Input/Tone – dBm
Input/Tone – dBm
Intermodulation Characteristic
0
3
V
= 5.0V, Pin5 : V
CC
CC
–
2.7
The vertical axis (Output/Tone) on this graph shows
the values displayed by the spectrum analyzer for
circuit 1.
The actual output power for the corresponding pins is
given by the following formula.
10
20
30
40
50
60
70
80
90
f = 44MHz, 45MHz, Circuit 1
Vagc
Output
–
–
–
–
–
–
–
–
2.4
2.1
1.8
1.5
1.2
{output power [dBm]} =
{displayed value [dBm]} + 10 ⋅ log (250Ω/50Ω)
0.9
0.6
0.3
0
–
100
10
–
–
–
–
–
–
–
–
–
–
–
20 15
65
60
55
50
45
40
35
30
25
Input/Tone – dBm
No.A1145-5/8
LA7796T
Gain -- Vagc Characteristic
= 5.0V
Pin5 : OPEN, f = 45MHz
Circuit 1
Gain -- Vagc Characteristic
= 5.0V
Pin5 : GND, f = 45MHz
Circuit 1
60
50
40
30
20
10
0
60
50
40
30
20
10
0
V
V
CC
CC
–
–
–
–
10
20
10
20
–
–
–
–
30
40
30
40
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.0
55
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Vagc – V
Gain -- Vagc Characteristic
Vagc – V
60
50
40
30
20
10
0
V
= 5.0V
CC
Pin5 : V , f = 45MHz
CC
Circuit 1
–
–
10
20
–
–
30
40
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Vagc – V
Noise Figure -- Gain Characteristic
Noise Figure -- Gain Characteristic
35
30
25
20
15
10
35
30
25
20
15
10
V
= 5.0V
V
= 5.0V
CC
CC
Pin5 : OPEN, f = 45MHz
Circuit 2
Pin5 : GND, f = 45MHz
Circuit 2
5
0
5
0
10
15
20
25
30
35
40
45
50
10
15
20
25
30
35
40
45
50
55
Voltage Gain – dB
Voltage Gain – dB
Noise Figure -- Gain Characteristic
35
30
25
20
15
10
V
= 5.0V
CC
Pin5 : V , f = 45MHz
CC
Circuit 2
5
0
10
15
20
25
30
35
40
45
50
55
Voltage Gain – dB
No.A1145-6/8
LA7796T
Gain -- Frequency Characteristic
Gain -- Frequency Characteristic
60
50
40
30
20
60
50
40
30
20
V
= 5.0V
V
= 5.0V
CC
CC
Pin5 : OPEN
Vagc = 2.5V
Circuit 1
Pin5 : GND
Vagc = 2.5V
Circuit 1
25°C
25°C
°C
-20
°C
-20
85°C
85°C
10
0
10
0
10
20
30
40
50
60
70
80
90
100
10
20
30
40
50
60
70
80
90
100
Frequency – MHz
Frequency – MHz
Gain -- Frequency Characteristic
60
50
40
30
20
25°C
°C
-20
85°C
V
= 5.0V
CC
Pin5 : V
10
0
CC
Vagc = 2.5V
Circuit 1
10
20
30
40
50
60
70
80
90
100
Frequency – MHz
Intermodulation Characteristic
Intermodulation Characteristic
0
10
20
0
10
20
V
= 5.0V, Pin5 : OPEN
V
= 5.0V, Pin5 : GND
CC
f = 44MHz, 45MHz, Circuit 1
CC
f = 44MHz, 45MHz, Circuit 1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Output
Output
30
40
50
60
70
80
90
30
40
50
60
70
80
90
IM3
IM3
–
–
100
–
100
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
20 15
70
65
60
55
50
45
40
35
30
25
20
15
70
65
60
55
50
45
40
35
30
25
Input/Tone – dBm
Input/Tone – dBm
Intermodulation Characteristic
0
V
= 5.5V, Pin5 : V
CC
CC
–
The vertical axis (Output/Tone) on this graph shows
the values displayed by the spectrum analyzer for
circuit 1.
The actual output power for the corresponding pins is
given by the following formula.
10
20
30
40
50
60
70
80
90
f = 44MHz, 45MHz, Circuit 1
Output
–
–
–
–
–
–
–
–
{output power [dBm]} =
{displayed value [dBm]} + 10 ⋅ log (250Ω/50Ω)
IM3
–
100
–
–
–
–
–
–
–
–
–
–
–
–
20 15
70
65
60
55
50
45
40
35
30
25
Input/Tone – dBm
No.A1145-7/8
LA7796T
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
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intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of September, 2008. Specifications and information herein are subject
to change without notice.
PS No.A1145-8/8
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