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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]
Function
.
Operational amplifier
Features
.
DC control
.
Temperature drift stability
.
100 V maximum supply voltage
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
CC
op 60 to 90 V
CC
80 V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
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
min (R)
V
OUT
V
min (G) 0.3 V
OUT
V
min (B) 0.3 V
OUT
max (R)
V
OUT
V
max (G) 77 V
OUT
V
max (B) 77 V
OUT
high (R)
V
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
low (R)
V
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)
No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like,
the failure of which may directly or indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility andindemnifyand defend SANYO ELECTRIC CO., LTD.,its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation
and all damages, cost and expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
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.
No. 4957-3/3
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