MAX3665 查看數據表（PDF） - Maxim Integrated

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MAX3665

622Mbps, Ultra-Low-Power, 3.3V Transimpedance Preamplifier for SDH/SONET

Maxim Integrated 

19-1601; Rev 2; 11/05

EVAALVUAAILTAIOBNLEKIT

622Mbps, Ultra-Low-Power, 3.3V

Transimpedance Preamplifier for SDH/SONET

________________General Description

The MAX3665 low-power transimpedance preamplifier

for 622Mbps SDH/SONET applications consumes only

70mW at VCC = 3.3V. Operating from a single +3.3V or

+5.0V supply, it converts a small photodiode current to a

measurable differential voltage. A DC cancellation circuit

provides a true differential output swing over a wide

range of input current levels, thus reducing pulse-width

distortion. The differential outputs are back-terminated

with 50Ω per side.

The overall transimpedance gain is nominally 8kΩ. For

input signal levels beyond approximately 50µAp-p, the

amplifier will limit the output swing to 250mV. The

MAX3665’s low 55nA input noise provides a typical

sensitivity of -33.2dBm in 1300nm, 622Mbps receivers.

The MAX3665 is designed to be used in conjunction

with the MAX3676 clock recovery and data retiming IC

with limiting amplifier. Together they form a complete

3.3V or 5.0V 622Mbps SDH/SONET receiver.

In die form, the MAX3665 is designed to fit on a header

with a PIN diode. It includes a filter connection that pro-

vides positive bias for the photodiode through a 1.5kΩ

resistor to VCC. The device is available in an 8-pin

µMAX® package.

____________________________Features

♦ +3.3V or +5.0V Single-Supply Operation

♦ 55nARMS Input-Referred Noise

♦ 70mW Power Consumption at VCC = 3.3V

♦ 8kΩ Gain

♦ 450µA Peak Input Current

♦ 260ps (max) Deterministic Jitter

♦ Differential Output Drives 100Ω Load

♦ 470MHz Bandwidth

_______________Ordering Information

PART

MAX3665EUA

MAX3665E/D

TEMP RANGE

-40°C to +85°C

(see Note)

PIN-PACKAGE

8 µMAX

Dice

Note: Dice are designed to operate over a -40°C to +140°C

junction temperature (Tj) range, but are tested and guaranteed

at TA = +25°C.

________________________Applications Pin Configuration appears at end of data sheet.

SDH/SONET Receivers

PIN Photodiode Preamplifiers and Receivers

µMAX is a registered trademark of Maxim Integrated Products, Inc.

Regenerators for SDH/SONET

__________________________________________________Typical Application Circuit

3.3V

0.01µF

RFILT

1.5kΩ

VCC

MAX3665

FILT

CFILT

IN

50Ω

OUT+

50Ω

OUT-

GND

0.1µF

0.1µF

3.3V

LIMITING

AMP

MAX3676

CLOCK

AND

DATA

RECOVERY

CLK

DATA

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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