SANYO SMA4201 User Manual
PRODUCT INFORMATION
Vol. 76
Optical Pickup High-Frequency Superposition IC Developed
Industry’s smallest device achieved by integration on a single chip
SMA4201
Background
Due to their short wavelengths and high outputs, single mode lasers are widely used as the lasing element in the optical pickups used in DVD, MD, CD-R, and similar equipment to read and write signals
from the recording media. The high-frequency superposition technique is used as a means for reducing the laser noise associated with these devices. Until now, high-frequency superposition circuits
have been implemented either as modules consisting of discrete transistors or as gallium arsenide
(GaAs) ICs. However, due to desires for further miniaturization and reduced costs in these products,
there are now strong desires for more compact high-frequency superposition circuits implemented as
silicon-based ICs.
Overview
Sanyo’s high-performance microwave silicon bipolar transistor and MMIC (monolithic microwave
integrated circuits) products, which are based on Sanyo’s unique silicon high-frequency device technology, have been well received in the market. Now, Sanyo has succeeded in developing and releasing
as a commercial product the SMA4201 ultraminiature optical pickup high-frequency superposition IC,
which is based on Sanyo’s unique high-frequency device circuit technology and Sanyo’s 16-GHz high
fT (cutoff frequency) silicon bipolar fabrication process.
Sanyo is committed to an active and forward-looking program of developing oscillator circuit device
products using this unique silicon high-frequency device technology and expanding its business in this
area. These products will be optimal for portable digital equipment applications, and will range from
the optical pickup device mentioned above to devices for use in portable telephones and notebook personal computers.
SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division
TOKYO OFFICE: Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
1
查询SMA4201供应商
SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division
2
Features
• Extreme miniaturization achieved by adopting a miniature molded package
(MCP6: 2.0
× 1.25 mm)
This IC integrates an oscillator circuit and an output amplifier circuit on a single chip packaged in
the MCP6 package for ultracompact surface mounting. Thus this IC can contribute to
miniaturization of optical pickup systems.
• Low-voltage operation: V
CC
= 3.0 to 3.5 V
This device achieves 3-V low-voltage operation and aims at improved reliability by adopting gold
electrodes (a gold, platinum, and titanium alloy) and Sanyo’s unique high-performance silicon
bipolar process that features a transistor cell with a high-precision submicron emitter, an extremely
shallow junction formation technology, and a process that reduces parasitic capacitances.
• Allows the selection of an oscillator frequency in the 200-MHz to 700-MHz range
Since the SMA4201 supports oscillator frequencies in the 200-MHz to 700-MHz range, it supports
the optical pickups used in MD, CD-R, DVD and DVD-ROM players and drives.
Specifications
Electrical Characteristics at Ta = 25°C
Sample Availability
Sample of the SMA4201 will be available in March 1999; production quantities will be anticipated in
the end of 1999.
MARCH 3, 1999
PRODUCT INFORMATION
Item Symbol Test condition Typical value Unit
Circuit current I
CC
VCC= 3 V 11 mA
Output power P
OSC
VCC= 3 V, f
OSC
= 450 MHz, RL= 50 Ω –3 dBm
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