MAX3664 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX3664

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

Maxim Integrated 

622Mbps, Ultra-Low-Power, 3.3V

Transimpedance Preamplifier for SDH/SONET

_____________________________Typical Operating Characteristics (continued)

(VCC = +3.3V, CCOMP = 400pF, TA = +25°C, unless otherwise noted.)

OUTPUT AMPLITUDE

vs. TEMPERATURE

800

INPUT = 300µAp-p

VCC = 3.6V

700

VCC = 3.3V

600

VCC = 3.0V

500

400

10mV/

div

300

200

-40 -20 0 20 40 60 80 100

AMBIENT TEMPERATURE (°C)

EYE DIAGRAM

(INPUT = 10µAp-p)

EYE DIAGRAM

(INPUT = 300µAp-p)

100mV/

div

INPUT: 213 - 1 PRBS

CONTAINS 72 ZEROS

300ps/div

INPUT: 213 - 1 PRBS

CONTAINS 72 ZEROS

300ps/div

_____________________Pin Description

PIN NAME

FUNCTION

1

VCC

+3.3V Supply Voltage

2

IN

Signal Input

3, 4

INREF1, Input References 1 and 2. Connect to

INREF2 photodetector AC ground.

5

GND Ground

Noninverting Voltage Output. Current

6

OUT+ flowing into IN causes VOUT+ to

increase.

7

OUT-

Inverting Voltage Output. Current flow-

ing into IN causes VOUT- to decrease.

External Compensation Capacitor for

DC cancellation loop. Connect 400pF

8

COMP

or more from COMP to GND for nor-

mal operation. Connect COMP directly

to GND to disable the DC cancellation

loop.

Filter Connection. Provides positive

bias for photodiode through a 1kΩ

—

FILT* resistor to VCC. See Step 3:

Designing Filters. (This pad is acces-

sible on the die only.)

* MAX3664E/D (die) only.

IN

INREF1

D1

RF

6k

VCC

Q1

TRANSIMPEDANCE

AMP

Q4

INREF2

DC

CANCELLATION

AMP

VCC

1k

(FILT)

VCC

PARAPHASE

AMP

R3

Q2

R1

OUT+

VCC

Q3

R2 OUT-

R4

MAX3664

( ) ARE FOR MAX3664E/D (DIE) ONLY.

COMP

Figure 1. Functional Diagram

4 _______________________________________________________________________________________

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