AGERE 2611A Datasheet

2611A Broadband Photodiode Module

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Description

The 2611A is a packaged impedance-matched pho­todiode module with internal gain designed for use in
optical broadband receivers in fiber-optic networks.
The patented impedance-match technology results in
improved gain-bandwidth product compared to exter­nal circuits due to control of parasitics between the
photodiode and the transformer.

Data Sheet

August 2000

Features

■

Flat response, ±0.5 dB

■

Frequency response up to 1 GHz

■

High responsivity:
— >0.85 A/W at 1310 nm
— 0.95 A/W at 1550 nm

■

Internal current gain, 6 dB (typ.)

■

Up to 3 dBm max. continuous received power
(6 dBm max.)

■

75 Ω impedance-matched

Applications

■

Broadband CATV receivers requiring high input
power for improved performance

Additionall
tortion performance at up to 6 dBm

, the 2611A is designed for superior dis-

received) input

power.

Pin Information

Table 1. Pin Descriptions

Pin No. Description

1 Ground
2 Ground
3 Ground
4 Ground
5 Ground
6 Ground
7Open
8Open

9RF Out
10 Ground
11 Bias
12 Ground
13 Open
14 Ground

Data Sheet

2611A Broadband Photodiode Module August 2000

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso­lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.

Parameter Symbol Min Max Unit

Operating Case Temperature Range T

C

Storage Temperature Range Tstg –40 85 °C
Optical Input Power P
dc Bias Voltage V
Forward Current I

IN

PD

F

–40 85 °C

—4mW
—30V
—10mA

Characteristics

.

Table 2. Electrical/Optical Characteristics

Parameter Symbol Min Typ Max Unit

Optical Wavelength

λ 1310—1550 ± 20 — —nm

Range
Responsivity — —

—

Optical Return Loss

1

RL — >45 — dB

>0.85 at 1310 nm,

>0.95 at 1550 nm

—
—

mA/mW
mA/mW

Bias Voltage — — 20 (nominal) — V
Dark Current I

1. Without connector

D

— 200 at 20 °C—nA

Table 3. RF Characteristics

Parameter Symbol Min Typ Max Unit

Frequency Range F 40 — 1000 MHz
Gain

1

G— >5 —dB
Frequency Response — — <± 0.5 — dB
Receiver Noise — See Figure 1.

2

Distortion Products

Second Order
Third Order

1. Current gain of internal transformer circuit.

2. Two laser test. Each laser has 40% modulation index. Total received optical power is 3 dBm. Distortion products measured at 80 MHz,
450 MHz, 600 MHz, 850 MHz, and 1000 MHz.

:

CSO

CTB

—
—
—

<–68 above 550 MHz

<–70 below 55 MHz

<–80

—
—
—

dBc
dBc
dBc

2

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