SANYO LA7784

Ordering number : ENN8386
LA7784
Monolithic Linear IC
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
Maximum supply voltage
Symbol
VCC max
Conditions
Pin 8, 14, 19, 20, 21, 22, 26, 27
Circuit voltages
V max
Pin 9
Circuit current
I12, 13
Pin 12, 13 sink current
Allowable power dissipation
Pd max
Ratings
Ta≤70°C
Unit
6.0
V
VCC
V
2
V
900*
mA
Operating temperature range
Topr
-20 to +70
mW
Storage temperature range
Tstg
-55 to +150
°C
* On the board (114.3×76.1×1.6mm)
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
Pin 8, 14, 19, 20, 21, 22, 26, 27
5.0
V
Operating supply voltage range
VCC op
Pin 8, 14, 19, 20, 21, 22, 26, 27
4.5 to 5.5
V
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, VCC = 3.3V
Parameter
Symbol
Pin No.
Ratings
Conditions
min
typ
Circuit current
Itotal
8, 14, 19, 20, 21, 22, 26, 27
No Signal
80
RF input frequency range
f(RF)
23, 24
fc:-3dB
50
Unit
max
105
RF AGC range
GR1
26, 27
V9 = 2.5 to 0V
45
53
Mixer conversion gain
CG1
26/23, 24
V9 = 2.5V
19
22
Mixer inter modulation 1
IM3 1
40
50
130
mA
150
MHz
25
dB
dB
27/23, 24
IF input frequency range
IF amplifier gain
f(IF)
G(AGC)
26/23, 24
Input = 75dBµ
27/23, 24
V9 = 2.5V
4, 5
fc:-3dB
30
12/4, 5
V9 = 2.5V
51
55
Output = 110dBµ
40
50
dB
100
MHz
59
dB
13/4, 5
IF inter modulation 2
IM3 2
12/4, 5
dB
13/4, 5
Range
12, 13
IF Output Level < ±1dB
IF AGC output level
Vo(IF) 1
GR2
12
Single output
3
1.0
5
Vp-p
dB
IF output level
Vo(IF) 2
13
Single output
1.0
Vp-p
Package Dimensions
unit: mm
3222A
No. 8386-2/7
LA7784
Pin Assignment
NC
1
28
DRIVER GND
NC
2
27
DRIVER OUTPUT
IF AGC AMP GND
3
26
DRIVER OUTPUT
IF AGC AMP INPUT
4
25
RF ATT GND
IF AGC AMP INPUT
5
24
RF ATT INPUT
NC
6
23
RF ATT INPUT
IF AGC AMP GND
7
22
RF ATT VCC
GND
GND
IF AGC AMP VCC
8
21
LNA VCC
AGC CONTROL
9
20
DRIVER VCC
NC
10
19
MIXER/LO VCC
IF DRIVER AMP GND
11
18
NC
IF DRIVER AMP OUTPUT
12
17
LO INPUT
IF DRIVER AMP OUTPUT
13
16
LO INPUT
IF DRIVER AMP VCC
14
15
MIXER/LO GND
Block Diagram
No. 8386-3/7
LA7784
Pin Description
Pin Number
(unit: Ω)
Description
1
No Connection
2
No Connection
3
AGC Amp GND
4
AGC Amp Input
Equivalent circuit
5
6
No Connection
7
AGC Amp GND
8
AGC Amp VCC
9
AGC Control
10
No Connection
11
Post Amp GND
Continued on next page.
No. 8386-4/7
LA7784
(unit: Ω)
Continued from preceding page.
Pin Number
12
Description
Equivalent circuit
Post Amp Outputs
13
14
Post Amp VCC
15
Mixer/LO GND
16
LO Input
17
18
No Connection
19
Mixer/LO VCC
20
Driver VCC
Continued on next page.
No. 8386-5/7
LA7784
(unit: Ω)
Continued from preceding page.
Pin Number
21
Description
Equivalent circuit
LNA VCC
22
23
LNA Inputs
24
25
LNA GND
26
Driver Outputs
27
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
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accordance with the above law.
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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