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General Information: (949) 579-3000

Headquarters – Newport Beach

4000 MacArthur Blvd., East Tower

Newport Beach, CA 92660-3007

02013-BRF-001-A

© 2005 Mindspeed Technologies, Inc. All rights reserved. Mindspeed and the Mindspeed

logo are trademarks of Mindspeed Technologies. All other trademarks are the prop-

erty of their respective owners. Although Mindspeed Technologies strives for accu-

racy in all its publications, this material may contain errors or omissions and is subject

to change without notice. This material is provided as is and without any express or

implied warranties, including merchantability, fitness for a particular purpose and

non-infringement. Mindspeed Technologies shall not be liable for any special, indirect,

incidental or consequential damages as a result of its use.

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• ATM/SDH/SONET

• OC-48 with FEC

• L4 Modules

• 2x Fiber Channel

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• M02013-A3: wafle pack (WP)

• M02013-QSPBG: quarter wafer

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Another feature of the AGC is that it only operates on

signals greater than –17.5 dBm (@ 0.9 A/W). This knee in the

gain response is important when setting “signal detect”

functions in the following post amplifier. It also aids in active

photodiode alignment.

The AGC pad allows the AGC to be disabled during photo-

diode alignment by grounding the pad through a low imped-

ance. The AGC control voltage can be monitored during

circuit.

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The signal from the TIA enters a phase splitter followed by a

DC-shift stage and a pair of voltage follower outputs. These

stable for driving capacitive loads, such as interstage filters.

Each output has its own GND pad, all four GND pads on the

chip should be connected for proper operation. Since the

M02013 exhibits rapid roll-off (3 pole), simple external

filtering is sufficient.

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High impedance O/P sinks replicate average photodiode

current for monitoring purposes.

DOUT

DOUT

MON

AGC

PINK

PINA

DC Shift

Phase

Splitter

1 V

DC

Restore

2.6 V

Vcc

Rm

Monitor output

DOUTB

DOUT

PINA

PINK

1 nf

470 pf

M02013 Block Diagram

Recommended Circuit