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SP8110

Two-Channel Modulation IC for Laser Diode

Signal Processing Technologies 

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SP8110

INPUT CHARACTERISTICS: IA/IB INPUT CURRENT VS INPUT VOLTAGE

MODE SELECTION

IA current

> 2.65 mA

< 2.5 mA

> 2.65 mA

< 2.5 mA

IB current

< 2.5 mA

> 2.65 mA

> 2.65 mA

< 2.5 mA

Mode

LD_A output active

LD_B output active

Error

Power Save

PIN ASSIGNMENTS

Pin No.

1

2

3

4

5

6

7

8

Pin Name

IA

IB

RFreq

Vcc

LD_B

GND

LD_A

Vcc_out

Function

Amplitude setting for output LD_A

Amplitude setting for output LD_B

Modulation Frequency adjusting pin

(An external resistor is connected between this pin and ground.)

Power supply pin

Output pin of channel B

(Anode of laser diode is connected with this pin.)

Ground pin

Output pin of channel A

(Anode of laser diode is connected with this pin.)

Power supply for LD_A and LD_B outputs

BOARD LAYOUT AND GROUNDING

To obtain the best performance from the SP8110, a printed circuit board with ground plane is

required. High quality, low series resistance ceramic 0.1uF bypass capacitors should be used at

the Vcc and Vcc_out pins (pins 4 and 8). Pin 8 should also have a 0.1uF bypass capacitor.

These capacitors must be located as close to the pins as possible. The traces connecting the

pins and the bypassing capacitors must be kept short and should be made as wide as possible.

Rev 0.1 (12-03-03): SP8110 – Two-Channel Modulation IC

SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-978-667-8700.

SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE

OR COPY

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