atr0881 ATMEL Corporation, atr0881 Datasheet - Page 2

• Manufacturer Part Number: atr0881
• Description: Atr0881 3-output Laser Driver With 5 Channels And Serial Interface
• Manufacturer: ATMEL Corporation

1. Description
The ATR0881 is a laser diode driver designed to operate two grounded red laser diodes for CD
and DVD and one floating blue laser diode for HD-DVD/Blu-ray. The floating blue laser diode
needs an extra supply voltage V
. Its 3-wire serial interface makes it very flexible and config-
H
urable for a wide range of applications. Five channels can be assigned to one of the two
reference current inputs IR and IW. Their gains can be individually set by DACs. Prescalers with
2 bits are provided to increase the resolution. Overcurrent protection circuits supervise the refer-
ence current inputs. The channel enable inputs can be configured as single ended or LVDS. In
SyncDrive mode, channels 3, 4, and 5 are synchronized to channel 2. The on-chip spread spec-
trum HFM with low EMI reduces laser mode hopping noise. All HFM frequency and swing
parameters can be set by the serial interface. A high frequency-accuracy can be achieved by the
frequency counter feature. HFM enable can be configured as single ended or LVDS or automat-
ically-disabling by write channels.
ATR0881 [Preliminary]
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9105AS–DVD–06/07