LA7784 [SANYO]
Downconverter IC for Digital CATV; 下变频器IC为数字CATV
| 型号： | LA7784 |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Downconverter IC for Digital CATV |
| 文件： | 总7页 (文件大小：163K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENN8386
Monolithic Linear IC
LA7784
Downconverter IC
for Digital CATV
Overview
The LA7784 is a downconverter IC for digital CATV. It accepts RF input frequencies from 50 to 150MHz and supports the
DOCSIS (USA) and Euro-DOCSIS (Europe) standards.
Features
• RF Mixer.
• Attenuation control for RF Mixer.
• Driver for SAW filter.
• IF AGC amplifier.
• IF Driver amplifier for ADC.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Pin 8, 14, 19, 20, 21, 22, 26, 27
Pin 9
Ratings
Unit
V
max
Maximum supply voltage
Circuit voltages
6.0
V
V
CC
V max
V
CC
2
Circuit current
I
Pin 12, 13 sink current
Ta≤70°C
V
12, 13
Allowable power dissipation
Operating temperature range
Storage temperature range
* On the board (114.3×76.1×1.6mm)
P
d max
opr
stg
900*
-20 to +70
-55 to +150
mA
mW
°C
T
T
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
V
Recommended supply voltage
Operating supply voltage range
Pin 8, 14, 19, 20, 21, 22, 26, 27
Pin 8, 14, 19, 20, 21, 22, 26, 27
5.0
CC
V
4.5 to 5.5
V
CC op
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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
products described or contained herein.
92706 / O2505 MS OT B8-6337 No.8386-1/7
LA7784
AC Characteristics at Ta = 25°C, V
CC
= 3.3V
Ratings
typ
Parameter
Symbol
Pin No.
Conditions
Unit
min
80
max
130
Circuit current
I
8, 14, 19, 20, 21, 22, 26, 27
No Signal
fc:-3dB
105
mA
MHz
dB
total
RF input frequency range
RF AGC range
f
23, 24
26, 27
50
45
19
150
(RF)
GR1
CG1
V
9
9
= 2.5 to 0V
= 2.5V
53
22
Mixer conversion gain
26/23, 24
27/23, 24
26/23, 24
27/23, 24
4, 5
V
25
dB
Mixer inter modulation 1
IM3 1
Input = 75dBµ
= 2.5V
fc:-3dB
= 2.5V
40
50
dB
V
9
IF input frequency range
IF amplifier gain
f
30
51
100
59
MHz
dB
(IF)
G
12/4, 5
13/4, 5
12/4, 5
13/4, 5
12, 13
V
9
55
50
(AGC)
IF inter modulation 2
IM3 2
Output = 110dBµ
40
3
dB
dB
Range
GR2
IF Output Level < ±1dB
Single output
5
1.0
1.0
IF AGC output level
IF output level
V
o
o
1
2
12
13
V
p-p
p-p
(IF)
(IF)
V
Single output
V
Package Dimensions
unit: mm
3222A
No. 8386-2/7
LA7784
Pin Assignment
1
2
3
4
5
6
7
28
27
26
25
24
23
22
DRIVER GND
NC
DRIVER OUTPUT
DRIVER OUTPUT
RF ATT GND
NC
IF AGC AMP GND
IF AGC AMP INPUT
IF AGC AMP INPUT
RF ATT INPUT
RF ATT INPUT
NC
IF AGC AMP GND
RF ATT V
CC
GND
GND
8
21
20
19
18
17
16
15
IF AGC AMP V
CC
LNA V
CC
9
AGC CONTROL
NC
DRIVER V
CC
10
11
12
13
14
MIXER/LO V
NC
CC
IF DRIVER AMP GND
IF DRIVER AMP OUTPUT
IF DRIVER AMP OUTPUT
LO INPUT
LO INPUT
IF DRIVER AMP V
MIXER/LO GND
CC
Block Diagram
No. 8386-3/7
LA7784
Pin Description
(unit: Ω)
Pin Number
Description
Equivalent circuit
1
2
3
No Connection
No Connection
AGC Amp GND
AGC Amp Input
4
5
6
7
8
9
No Connection
AGC Amp GND
AGC Amp V
CC
AGC Control
10
11
No Connection
Post Amp GND
Continued on next page.
No. 8386-4/7
LA7784
Continued from preceding page.
(unit: Ω)
Pin Number
Description
Equivalent circuit
12
13
Post Amp Outputs
14
15
Post Amp V
CC
Mixer/LO GND
LO Input
16
17
18
19
20
No Connection
Mixer/LO V
CC
Driver V
CC
Continued on next page.
No. 8386-5/7
LA7784
Continued from preceding page.
(unit: Ω)
Pin Number
Description
Equivalent circuit
21
22
LNA V
CC
23
24
LNA Inputs
25
LNA GND
26
27
Driver Outputs
28
Driver Gnd
No. 8386-6/7
LA7784
Test Circuit
Specifications of any and all SANYO Semiconductor 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.
SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any
and all semiconductor products fail with some probability. It is possible that these probabilistic failures
could give rise to accidents or events that could endanger human lives, that could give rise to smoke or
fire, or 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 products (including technical data,services) described
or contained herein are controlled under any of applicable local export control laws and regulations, such
products must not be exported without obtaining 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 permission 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 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. SANYO Semiconductor believes information herein is accurate and
reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual
property rights or other rights of third parties.
This catalog provides information as of October, 2005. Specifications and information herein are subject
to change without notice.
PS No.8386-7/7
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