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Ordering number: EN 4957A
Monolithic Linear IC
LA7890
RGB Cutoff Adjustment IC
Overview
The LA7890 is a DC-controlled, CRT display RGB cutoff
adjustment IC. It can be used for a wide range of applications,
regardless of whether they employ a Trinitron tube or a
dot-matrix tube display.
Package Dimensions
unit : mm
3043A-SIP10
[LA7890]
24.2
3.25
Function
6.5
.
Operational amplifier
Features
.
DC control
.
Temperature drift stability
.
100 V maximum supply voltage
7.7max
4.9
1.1min
1
1.22.540.67
0.5
10
0.25
1.5
SANYO : SIP10
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Allowable power dissipation Pd max Ta % 75°C 400 mW
Operating temperature Topr –10 to +75 °C
Storage temperature Tstg –55 to +150 °C
max 100 V
CC
Recommended Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage V
Any and all SANYO 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 representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO 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 products described or contained
herein.
CC
op 60 to 90 V
CC
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
80 V
O3096HA(II)/41495TH(ID) No.4957-1/3
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LA7890
Operating Characteristics at Ta = 25°C, VCC=80V
Parameter Symbol Conditions min typ max Unit
Current drain I
Minimum reference voltage V
Maximum reference voltage V
Minimum output voltage
Maximum output voltage
High-level output voltage
Mid-level output voltage
Low-level output voltage
CC
min Reference value 0 V
REF
max Reference value 75 V
REF
V
min (R)
OUT
V
min (G) 0.3 V
OUT
V
min (B) 0.3 V
OUT
V
max (R)
OUT
V
max (G) 77 V
OUT
V
max (B) 77 V
OUT
V
high (R)
OUT
V
high (G) 67 69 71 V
OUT
V
high (B) 67 69 71 V
OUT
mid (R)
V
OUT
V
mid (G) 37 39 41 V
OUT
V
mid (B) 37 39 41 V
OUT
V
low (R)
OUT
V
low (G) 7 9 11 V
OUT
V
low (B) 7 9 11 V
OUT
Internal Equivalent Circuit Block Diagram
When 6 V DC is applied to TP1, TP3 and
TP5, and 9 V is applied to TP7
When 12 V DC is applied to TP1, TP3 and
TP5, and 9 V is applied to TP7
When 0 V DC is applied to TP1, TP3 and
TP5, and 9 V is applied to TP7
When 3 V DC is applied to TP1, TP3 and
TP5, and 9 V is applied to TP7
When 6 V DC is applied to TP1, TP3 and
TP5, and 9 V is applied to TP7
When 9 V DC is applied to TP1, TP3 and
TP5, and 9 V is applied to TP7
1.9 2.2 2.7 mA
0.3 V
77 V
67 69 71 V
37 39 41 V
7911V
Test Circuit
No.4957-2/3
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Sample Application Circuit
LA7890
Braun tube
(CRT)
Specifications of any and all SANYO 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 Electric 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 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 Electric 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 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 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, 1996. Specifications and information herein are subject to
change without notice.
PS No.4957-3/3
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