02050-DSH-002-F

Mindspeed Technologies™

8

Mindspeed Proprietary and Confidential

3.0 Functional Description

3.1

Overview

The M02050-15 is an integrated high-gain limiting amplifier. The M2050 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.

Figure 3-1.

Block Diagram Example

Level

Detect

Limiting

Amplifier

Comparator

Level

Shift

RSSI

PP

LOS

DINN

RSSI

AVG

DINP

PECLN

PECLP

Offset cancel

Output

Buffer

Threshold

Setting

Circuit

Regulator

Biasing

I

REF

Jam

V

TT