Maxim MAX3664E-D, MAX3664EUA, MAX3664ESA Datasheet

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19-0479; Rev 1; 7/97

________________General Description

The MAX3664 low-power transimpedance preamplifier
for 622Mbps SDH/SONET applications consumes only
85mW. Operating from a single +3.3V 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 60Ω per side.

The transimpedance gain is nominally 6kΩ. For input
signal levels beyond approximately 100µAp-p, the
amplifier will limit the output swing to 900mV. The
MAX3664’s low 55nA input noise provides a typical
sensitivity of -33.2dBm in 1300nm, 622Mbps receivers.

The MAX3664 is designed to be used in conjunction
with the MAX3675 clock recovery and data retiming IC
with limiting amplifier. Together, they form a complete

3.3V, 622Mbps SDH/SONET receiver.
In die form, the MAX3664 is designed to fit on a header

with a PIN diode. It includes a filter connection, which
provides positive bias for the photodiode through a 1kΩ
resistor to VCC. The device is also available in 8-pin SO
and µMAX packages.

________________________Applications

SDH/SONET Receivers
PIN/Preamplifier Receivers
Regenerators for SDH/SONET

____________________________Features

♦ Single +3.3V Supply Operation
♦ 55nA

RMS

Input-Referred Noise

♦ 6kΩ Gain
♦ 85mW Power
♦ 300µA Peak Input Current
♦ 200ps Max Pulse-Width Distortion
♦ Differential Output Drives 100Ω Load
♦ 590MHz Bandwidth

MAX3664

622Mbps, Ultra-Low-Power, 3.3V

Transimpedance Preamplifier for SDH/SONET

________________________________________________________________

Maxim Integrated Products

1

MAX3664

MAX3675

LIMITING

AMP

100pF

INREF2

1k

V

CC

100Ω

0.01µF

47nF

VCC (+3.3V)

DATA

CLK

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

47nF

400pF

OUT+

OUT-

COMP

GND

V

CC

(+3.3V)

(FILT)

INREF1

IN

DATA

AND

CLOCK

RECOVERY

__________________________________________________Typical Application Circuit

PART

MAX3664E/D
MAX3664ESA
MAX3664EUA* -40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

Dice
8 SO
8 µMAX

EVALUATION KIT

AVAILABLE

_______________Ordering Information

Pin Configuration appears at end of data sheet.

* Contact factory for package availability.

MAX3664

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +3.3V ±0.3V, COMP = GND, 100Ω load between OUT+ and OUT-, TA= -40°C to +85°C. Typical values are at TA= +25°C,
unless otherwise noted.) (Notes 1, 2)

AC ELECTRICAL CHARACTERISTICS

(VCC= +3.3V ±0.3V, C

COMP

= 400pF, CIN= 1.1pF, outputs terminated into 50Ω, 8-pin SO package in MAX3664 EV board,

TA= +25°C, unless otherwise noted.) (Notes 3, 4)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Note 3: AC Characteristics are guaranteed by design.
Note 4: C

IN

is the total capacitance at IN.

Note 5: PWD =

|

2 x Pulse width - Period

|

2

Note 6: DC to 470MHz, measured with 3-pole Bessel filter at output.

Note 1: Dice are tested at T

j

= +27°C.

Note 2: µMAX package tested at T

A

= +25°C to +85°C.

V

CC

........................................................................-0.5V to +5.5V

Continuous Current

IN, INREF1, INREF2, COMP, FILT....................................5mA

OUT+, OUT-...................................................................25mA

Continuous Power Dissipation (T

A

= +85°C)

SO (derate 5.88mW/°C above +85°C)........................383mW

µMAX (derate 4.1mW/°C above +85°C) .....................268mW

Operating Junction Temperature (die)..............-40°C to +150°C

Processing Temperature (die).........................................+400°C

Storage Temperature Range.............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

I

IN

= 0

IIN= 0 to 20µA

IIN= 0 to 300µA

IIN= 300µA

Differential output

f < 1MHz, referred to output
IIN= 200µA, C

COMP

= 400pF

CONDITIONS

mA12 25 35I

CC

Supply Current

%±5

V0.8 0.95V

IN

Input Bias Voltage
Gain Nonlinearity

mV950V

OUT

(max)Maximum Output Voltage

Ω40 60 75Z

OUT

Output Impedance (per side)

kΩ4.5 6 7.5z

21

Small-Signal Transimpedance

VVCC- 1.3Output Common-Mode Level

dB20PSRRPower-Supply Rejection Ratio

mV±7∆V

OUT

Differential Output Offset

UNITSMIN TYP MAXSYMBOLPARAMETER

Relative to gain at 10MHz

CIN= 1.1pF (Note 6), IIN= 0

2µA to 100µA peak input current,
50% duty cycle, 1–0 pattern

100µA to 300µA peak input current,
50% duty cycle, 1–0 pattern

CIN= 0.3pF (Note 6), IIN= 0

CONDITIONS

kHz150

MHz590BW

-3dB

Small-Signal Bandwidth
Low-Frequency Cutoff

nA

73 86

i

n

RMS Noise Referred to Input

6 100

ps

80 200

PWD

Pulse-Width Distortion
(Note 5)

55

UNITSMIN TYP MAXSYMBOLPARAMETER

Ω800 1000 1200R

FILT

Filter Resistor (die only)

MAX3664

622Mbps, Ultra-Low-Power, 3.3V

Transimpedance Preamplifier for SDH/SONET

_______________________________________________________________________________________

3

100

0

-40 30 100

INPUT-REFERRED NOISE

vs. TEMPERATURE

30
20

40

10

70

90
80

60

MAX3664-01

JUNCTION TEMPERATURE (°C)

NOISE (nA)

-5 65

50

470MHz BANDWIDTH

CIN = 1.5pF

CIN = 0.5pF

CIN = 1.0pF

CIN IS SOURCE CAPACITANCE
PRESENTED TO DIE. INCLUDES PACKAGE
PARASITIC, PIN DIODE, AND PARASITIC
INTERCONNECT CAPACITANCE

80
78

76

10k 100k 10M 10G

SMALL-SIGNAL GAIN

vs. FREQUENCY

62
60

72
70

74

68

MAX3664-02

FREQUENCY (Hz)

GAIN (dB)

1M 100M

64

66

1G

MAX3664 IN EV BOARD

COMP CONNECTED
TO GROUND

COMP CONNECTED
THROUGH 400pF
TO GROUND

200

-50

-40 25 45 85

PULSE-WIDTH DISTORTION

vs. TEMPERATURE

0

100

150

MAX3664-03

AMBIENT TEMPERATURE (°C)

PWD (ps)

-25

0 65

50

IIN = 100µA

IIN = 300µA

MAX3664 IN EV BOARD

1000

0.1 1 10

100

1000

INPUT-REFERRED RMS NOISE CURRENT

vs. DC INPUT CURRENT

MAX3664-04

DC INPUT CURRENT (µA)

RMS NOISE CURRENT (nA)

10

100

C

STC

= 0.5pF

470MHz BANDWIDTH

300

0

0 80 100 120 160

LOW-FREQUENCY CUTOFF

vs. AVERAGE INPUT CURRENT

50

150

250

200

MAX3664-07

AVERAGE INPUT CURRENT (µA)

LOW-FREQUENCY CUTOFF (kHz)

20 40 60 140

100

C

COMP

= 50pF

C

COMP

= 100pF

C

COMP

= 200pF

C

COMP

= 400pF

C

COMP

= 1000pF

6400

5800

-40 30 100

SMALL-SIGNAL TRANSIMPEDANCE

vs. TEMPERATURE

5900

6000

6200

6300

MAX3664-05

JUNCTION TEMPERATURE (°C)

TRANSIMPEDANCE (Ω)

-5 65

6100

VCC = 3V

MEASUREMENT FREQUENCY = 20MHz

VCC = 3.6V

650

400

-40 30 100

BANDWIDTH vs. TEMPERATURE

450

500

550

600

MAX3664-06

JUNCTION TEMPERATURE (°C)

BANDWIDTH (MHz)

-5 65

CIN = 0.5pF

CIN = 1.0pF

CIN = 1.5pF

CIN IS SOURCE CAPACITANCE
PRESENTED TO DIE. INCLUDES PACKAGE
PARASITIC, PIN DIODE, AND PARASITIC
INTERCONNECT CAPACITANCE

120

0

0 150 200 300

DATA-DEPENDENT JITTER

vs. INPUT SIGNAL AMPLITUDE

20

60

100

80

MAX3664-08

PEAK-TO-PEAK AMPLITUDE (µA)

PEAK-TO-PEAK JITTER (ps)

50 100 250

40

C

COMP

= 100pF

C

COMP

= 200pF

C

COMP

= 400pF

C

COMP

= 800pF

EXTINCTION RATIO > 10

INPUT: 213 - 1 PRBS
CONTAINS 72 ZEROS

__________________________________________Typical Operating Characteristics

(VCC= +3.3V, C

COMP

= 400pF, TA= +25°C, unless otherwise noted.)

-1.15

-1.40

-40 40 60 100

OUTPUT COMMON-MODE VOLTAGE

(REFERENCED TO V

CC

) vs. TEMPERATURE

-1.35

-1.30

-1.20

-1.25

MAX3664-09

AMBIENT TEMPERATURE (°C)

COMMON-MODE VOLTAGE (V)

-20 0 20 80

VCC = 3.0V

VCC = 3.3V

VCC = 3.6V

MAX3664

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

4 _______________________________________________________________________________________

_____________________________Typical Operating Characteristics (continued)

(VCC= +3.3V, C

COMP

= 400pF, TA= +25°C, unless otherwise noted.)

800

200

-40 40 60 100

OUTPUT AMPLITUDE

vs. TEMPERATURE

300

500

700

600

MAX3664-10

AMBIENT TEMPERATURE (°C)

AMPLITUDE (mV)

-20 0 20 80

400

INPUT = 300µAp-p

VCC = 3.6V

VCC = 3.3V

VCC = 3.0V

EYE DIAGRAM

(INPUT = 10µAp-p)

10mV/

div

MAX3664-11

300ps/div

INPUT: 213 - 1 PRBS
CONTAINS 72 ZEROS

EYE DIAGRAM

(INPUT = 300µAp-p)

100mV/

div

MAX3664-12

300ps/div

INPUT: 213 - 1 PRBS
CONTAINS 72 ZEROS

DC

CANCELLATION

AMP

PARAPHASE

AMP

V

CC

V

CC

V

CC

V

CC

D1

Q2

Q3

R3

R4

R2

R1

OUT+

(FILT)

OUT-

1k

6k

Q1

INREF2

INREF1

IN

Q4

TRANSIMPEDANCE
AMP

COMP

MAX3664

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

R

F

_____________________Pin Description

NAME FUNCTION

1

V

CC

+3.3V Supply Voltage

2 IN Signal Input

PIN

3, 4

INREF1,

INREF2

Input References 1 and 2. Connect to
photodetector AC ground.

5 GND Ground

— FILT*

Filter Connection. Provides positive
bias for photodiode through a 1kΩ
resistor to VCC. See

Step 3:

Designing Filters

. (This pad is acces-

sible on the die only.)

8 COMP

External Compensation Capacitor for
DC cancellation loop. Connect 400pF
or more from COMP to GND for nor­mal operation. Connect COMP directly
to GND to disable the DC cancellation
loop.

7 OUT-

Inverting Voltage Output. Current flow­ing into IN causes V

OUT-

to decrease.

6 OUT+

Noninverting Voltage Output. Current
flowing into IN causes V

OUT+

to

increase.

* MAX3664E/D (die) only.

Figure 1. Functional Diagram