02050-DSH-002-F

Mindspeed Technologies™

August 2005

Mindspeed Proprietary and Confidential

M02050-15

3.3/5V Limiting Amplifier for Applications to 2.5 Gbps

Applications

• 2.5 Gbps STM-16/OC-48 SDH/SONET

• 1.06, 2.12 and 4.24 Gbps Fibre Channel

• 1.25 Gbps Ethernet

• 1.25 Gbps SDH/SONET

• 2.67 Gbps SDH/SONET with FEC

The M02050-15 is an integrated high-gain limiting amplifier. The M02050-15 features PECL outputs and is intended

for use in applications to 2.5 Gbps. Full output swing is achieved even at minimum input sensitivity. The M02050-15

can operate with a 3.3V or 5V supply.

Rate select is supported for SFP applications and/or to achieve optimum sensitivity at data rates

≤ 1.25 Gbps.

When rate select is high, optimum sensitivity is achieved at 2.5 Gbps.

The M02050-15 also includes two analog RSSI outputs proportional to either the average or peak to peak input sig-

nal and a programmable signal-level detector allowing the user to set thresholds at which the logic outputs are

enabled.

Other available solutions: M02049-15 3.3/5V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)

M02040-15 3.3/5V Limiting Amplifier for Applications to 2.125 Gbps (PECL outputs)

M02043-15 3.3/5V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)

1.25 Gbps and 4.25 Gbps SFP reference designs available on Mindspeed.com

Typical Applications Diagram

optional

Level

Detect

Limiting

Amplifier

Comparator

Level

Shift

PECLN

PECLP

Offset cancel

Threshold

Setting

Circuit

Regulator

V

CC

ST

SET

V

CC3

Biasing

Jam

LOS

R

ST

12.1 k

Ω

T I A

Photodiode

+3.3 V

DINN

RSSI

AVG

DINP

AC-Coupled

to TIA

R

EXT

MON

M02013

Output

Buffer

AC or DC Coupled

(as described in

Applications Information)

Clock Data

Recovery

Unit

RATE

Features

• Operates with a 3.3V or 5V supply

• 3.5 mV typical input sensitivity at 2.5 Gbps

• PECL outputs

• Rate Selection for

≤ 1.25 Gbps operation

• On-chip DC offset cancellation circuit

• Low power (< 180 mW at 3.3V)

• Output Jam Function

• 16 pin 3x3 QFN package