Ordering number : ENA1145A
Monolithic Linear IC
LA7796T
Overview
For Digital CATV/Cable Modem Receiver
AGC Amplifier
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 Maximum Supply Voltage Circuit Voltages Circuit Current Symbol VCC max V max I6 I7 Allowable Power Dissipation Operating Temperature Range Storage Temperature Range Specified board: 20.0mm × 10.0mm Pd max Topr Tstg 0.8mm, glass epoxy board. Pin 1 Pin 4 , Pin 5 Pin 6 sink current Pin 7 sink current Ta ≤ 85°C Conditions Ratings 7.0 VCC op 2 2 220 -20 to 85 -55 to 150 Unit V V mA mA mW °C °C
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 Recommended Supply Voltage Operating Supply Voltage Range Symbol VCC VCC op Pin 1 Pin 1 Conditions Ratings 5.0 4.5 to 5.5 Unit V V
Electrical Characteristics at Ta = 25°C, VCC = 5V
Parameter Circuit Current IF Input Frequency Range Noise Figure Symbol Itotal f(in) NF Pin No. 1 2,3 6,7 No Signal fc : -3dB V4 = 3.0V, f = 45MHz V4 = 3.0V, f = 45MHz V4 = 3.0V, f = 45MHz Intermodulation IM3 6/2,3 7/2,3 Total Amplifier Gain G(AGC1) G(AGC2) G(AGC3) AGC Range IF Output Level AGC Control Max. Voltage AGC Control Min. Voltage Input Impedance GR VO(IF)1 V4H V4L Zin 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 4 4 2,3 V4 = 3.0V, f1 = 44MHz, f2 = 45MHz, Output = 104dBμ each V4 = 3.0V, f = 45MHz V4 = 3.0V, f = 45MHz V4 = 3.0V, f = 45MHz IF Output Level < ±1dB f = 45MHz Output Level, f = 45MHz Gain Max. Gain Min. V4 = 0V, f = 45MHz 1 1 1 3 2.5 0 1//6.5 1.0 3 0.5 Vp-p V V kΩ//pF 1 40 dB Pin5: OPEN 1 37.5 40 42.5 dB Pin5: GND 1 40.5 43 45.5 dB Pin5: VCC 1 45.5 48 50.5 dB 1 50 dB Pin5: OPEN 2 5 dB Pin5: GND 2 4 dB Pin5: VCC Conditions Test circuit 1 1 2 min 25 30 3 Ratings typ 30 max 35 100 mA MHz dB Unit
Package Dimensions
unit : mm (typ) 3245B
3.0 8
3.0
4.9
1 (0.53)
2 0.65 0.25
(0.85) 1.1MAX
0.125
SANYO : MSOP8(150mil)
0.08
0.5
No.A1145-2/8
LA7796T
Block Diagram
VCC 1 IF input1 2 8 GND
7 Driver output1
IF input2 3 AGC AGC control 4
6 Driver output2
5 Gain control switch
(Caution) Be sure to connect pin 5 to either VCC or GND or keep it open.
Test Circuit1
1 VCC
TOKO 617DB-1010 B4F 1000pF 1000pF
8
200Ω
2
1000pF
7
1000pF
Spectrum Analyzer
Zo=50Ω 1000pF
Vin
3 AGC 4 AGC Voltage
1000pF
6
200Ω 51Ω
5
1000pF
VCC SW
Output Voltage is divided by 50Ω / (200+50)Ω
Test Circuit2
1 VCC Noise Figure Analyzer: Source
TOKO 617DB-1010 B4F 1000pF 1000pF 1000pF 1000pF
8
200Ω
2
7
Noise Figure Analyzer: Sence
3
1000pF
6 AGC
200Ω 51Ω
4 AGC Voltage
1000pF
5
1000pF
VCC SW
Test Circuit3
1 VCC Network Analyzer
1000pF 51Ω 1000pF 1000pF 1000pF 1000pF
8
200Ω 51Ω
2
7
3 AGC 4
6
200Ω 51Ω
5
1000pF
VCC SW
AGC Voltage
1000pF
No.A1145-3/8
LA7796T
Pin Function
Pin No. 1 2 3 VCC IF input. Function Equivalent circuit
VCC Bias 2 3
4
AGC control.
VCC
4
10kΩ
5
Gain control Switch.
VCC
35kΩ
5
10kΩ
35kΩ
6 7
Driver output.
VCC
6 7
20Ω 20Ω
8.0mA
8.0mA
8
GND
No.A1145-4/8
LA7796T
60 50 40
Gain -- Vagc Characteristic
VCC = 5.0V f = 45MHz Circuit 1 Pin5 : VCC Pin5 : GND Pin5 : OPEN
Noise Figure – dB
35
Noise Figure -- Gain Characteristic
VCC = 5.0V, f = 45MHz Circuit 2
30
Voltage Gain – dB
30 20 10 0 – 10 – 20 – 30 – 40 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
25
20
15
n5 Pi
n5 Pi
n5 Pi
10
:V
:G ND
:O N PE
CC
5 0 0 15 20 25 30
35
40
45
50
55
Vagc – V
60
Voltage Gain – dB
Gain -- Frequency Characteristic
VCC = 5.0V, Vagc = 2.5V Circuit 1 Pin5 : VCC Pin5 : GND
50
Voltage Gain – dB
40
Pin5 : OPEN
30
20
10
0 10
20
30
40
50
60
70
80
90
100
Frequency – MHz
0 – 10 – 20
Intermodulation Characteristic
VCC = 5.0V, Pin5 : OPEN f = 44MHz, 45MHz, Circuit 1 Vagc put Out
Va g c
3 2.7 2.4
0 – 10 – 20
Intermodulation Characteristic
VCC = 5.0V, Pin5 : GND f = 44MHz, 45MHz, Circuit 1 Vagc t tpu Ou
Va g c
3 2.7 2.4 2.1
Output
Output
Output/Tone – dBm
Output/Tone – dBm
– 30 – 40 – 50 – 60 – 70 – 80 – 90
2.1
– 30 – 40 – 50 – 60 – 70 – 80 – 90
1.5 1.2
Vagc – V
1.5 1.2
IM3
0.9 0.6 0.3
IM3
0.9 0.6 0.3
– 100 0 – 70 – 65 – 60 – 55 – 50 – 45 – 40 – 35 – 30 – 25 – 20 – 15
– 100 0 – 70 – 65 – 60 – 55 – 50 – 45 – 40 – 35 – 30 – 25 – 20 – 15
Input/Tone – dBm
0 – 10 – 20
Input/Tone – dBm
3 2.7 2.4 2.1
Intermodulation Characteristic
VCC = 5.0V, Pin5 : VCC f = 44MHz, 45MHz, Circuit 1 Vagc t tpu Ou Output
Output/Tone – dBm
– 30 – 40 – 50 – 60 – 70 – 80 – 90
Vag c
IM3
1.5 1.2 0.9 0.6 0.3
Vagc – V
1.8
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. {output power [dBm]} = {displayed value [dBm]} + 10 ⋅ log (250Ω/50Ω)
– 100 10
0 – 65 – 60 – 55 – 50 – 45 – 40 – 35 – 30 – 25 – 20 – 15
Input/Tone – dBm
No.A1145-5/8
Vagc – V
1.8
1.8
LA7796T
60 50 40
Gain -- Vagc Characteristic
VCC = 5.0V Pin5 : OPEN, f = 45MHz Circuit 1
Voltage Gain – dB
60 50 40 30
Gain -- Vagc Characteristic
VCC = 5.0V Pin5 : GND, f = 45MHz Circuit 1
Voltage Gain – dB
30 20
25 °C
10 0
10 0 – 10 – 20
– 10 – 20
85 °
85 °
C
C
– 30 – 40
C
– 30 – 40 0
-2
0°
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-2
0.5
0°
1.0
C
25 °C
20
0
1.5
2.0
2.5
3.0
3.5
4.0
Vagc – V
60 50 40
Vagc – V
Gain -- Vagc Characteristic
VCC = 5.0V Pin5 : VCC, f = 45MHz Circuit 1
Voltage Gain – dB
30 20 10
– 10
85
0
– 30 – 40 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
-2
– 20
0° C
°C
25 °C
Vagc – V
35
Noise Figure -- Gain Characteristic
VCC = 5.0V Pin5 : OPEN, f = 45MHz Circuit 2
Noise Figure – dB
35
Noise Figure -- Gain Characteristic
VCC = 5.0V Pin5 : GND, f = 45MHz Circuit 2
30
30
Noise Figure – dB
25
-2
85
85
0° C
°C
°C
25 °C
25
-2
0° C
25
20
20
°C
15
15
10
10
5 0 10
5 0 10
15
20
25
30
35
40
45
50
55
15
20
25
30
35
40
45
50
55
Voltage Gain – dB
35
Voltage Gain – dB
Noise Figure -- Gain Characteristic
85 °C
0° C
30
VCC = 5.0V Pin5 : VCC, f = 45MHz Circuit 2
25 °C
Noise Figure – dB
25
-2
20
15
10
5 0 10
15
20
25
30
35
40
45
50
55
Voltage Gain – dB
No.A1145-6/8
LA7796T
60
Gain -- Frequency Characteristic
VCC = 5.0V Pin5 : OPEN Vagc = 2.5V Circuit 1
-20°C 85°C
60
Gain -- Frequency Characteristic
VCC = 5.0V Pin5 : GND Vagc = 2.5V Circuit 1
50
25°C
Voltage Gain – dB
50
25°C
-20°C 85°C
Voltage Gain – dB
40
40
30
30
20
20
10
10
0 10
20
30
40
50
60
70
80
90
100
0 10
20
30
40
50
60
70
80
90
100
Frequency – MHz
60
Frequency – MHz
Gain -- Frequency Characteristic
25°C
-20°C 85°C
50
Voltage Gain – dB
40
30
20
10
0 10
VCC = 5.0V Pin5 : VCC Vagc = 2.5V Circuit 1
20 30 40 50 60 70 80 90 100
Frequency – MHz
0 – 10 – 20
Intermodulation Characteristic
VCC = 5.0V, Pin5 : OPEN f = 44MHz, 45MHz, Circuit 1 Output
Output/Tone – dBm
0 – 10 – 20
Intermodulation Characteristic
VCC = 5.0V, Pin5 : GND f = 44MHz, 45MHz, Circuit 1 Output
Output/Tone – dBm
– 30 – 40 – 50 – 60 – 70 – 80 – 90
°C
-20
°C
-20
– 40 – 50 – 60 – 70 – 80 – 90
85
° 25
C
25
°C
IM3
IM3
– 100 – 70 – 65 – 60 – 55 – 50 – 45 – 40 – 35 – 30 – 25 – 20
– 15
– 100 – 70 – 65 – 60 – 55 – 50 – 45 – 40 – 35 – 30 – 25 – 20 – 15
Input/Tone – dBm
0 – 10 – 20
Input/Tone – dBm
Intermodulation Characteristic
VCC = 5.5V, Pin5 : VCC f = 44MHz, 45MHz, Circuit 1 °C -20 C 25° C 85° Output
Output/Tone – dBm
– 30 – 40 – 50 – 60 – 70 – 80 – 90
°C 25
85
-20 °C °C
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. {output power [dBm]} = {displayed value [dBm]} + 10 ⋅ log (250Ω/50Ω)
IM3
– 100 – 70 – 65 – 60 – 55 – 50 – 45 – 40 – 35 – 30 – 25 – 20 – 15
Input/Tone – dBm
No.A1145-7/8
85
°C
°C
°C -20 5°C 8
25°
C
– 30
°C -20 C 85°
C 25°
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. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or 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 September, 2008. Specifications and information herein are subject to change without notice. PS No.A1145-8/8
