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MAX3969ETP+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX3969 limiting amplifier with PECL data outputs is
ideal for low-cost ATM, Fast Ethernet, FDDI and ESCON
fiber optic receivers.
The MAX3969 features 1mV
P-P
input sensitivity and an
integrated power detector that senses the input signal
power. It provides a received-signal-strength indicator
(RSSI), which is an analog indication of the power level.
Signal strength is also indicated by the complementary
TTL loss-of-signal (LOS) outputs and the PECL signal-
detect (SD) output, both of which indicate the power
level relative to a programmable threshold.
The threshold can be adjusted to detect signal ampli-
tudes as low as 2.7mV
P-P
. An optional squelch function
disables switching of the data outputs by holding them
at a known state when the signal is below the pro-
grammed threshold.
The MAX3969 is available in die form and a 4mm x
4mm, 20-pin thin QFN package.
Applications
SFP/SFF Transceivers
Fast Ethernet/FDDI Transceivers
155Mbps LAN ATM Transceivers
ESCON Receivers
FTTx Transceivers
Features
♦ 1mV
P-P
Input Sensitivity
♦ Loss-of-Signal Detector with Programmable
Threshold
♦ TTL LOS and PECL Signal Detect
♦ Analog Received-Signal-Strength Indicator
♦ Output Squelch Function
♦ Compatible with 4B/5B Data Coding
MAX3969
200Mbps SFP Limiting Amplifier
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
150Ω 150Ω
V
CC
C
IN
4700pF
C
IN
4700pF
C
AZ
1μF
C
FILTER
0.01μF
TRANSIMPEDANCE
AMPLIFIER
DIAGNOSTIC
MONITOR
SQUELCH
IN-
IN+
CZP CZN FILTER V
CC
V
CCO
INV V
TH
GND
EP*
*EXPOSED PAD (EP) ON MAX3969ETP ONLY.
LOS
LOS
OUT+
OUT-
SD
R2
R1
100kΩ
MAX3969
0.1μF
OUT+
OUT-FILT
IN
0.1μF
0.1μF
+2.97V TO +3.63V
R
LOS
4.7kΩ
TO
10kΩ
SFP OPTICAL RECEIVER WITH DIAGNOSTICS HOST BOARD
Typical Application Circuits
19-3251; Rev 1; 6/06
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.
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-
PACKAGE
PKG CODE
MAX3969ETP
-40°C to +85°C 20 Thin QFN
T2044-2
MAX3969E/D
— Dice* —
*Dice are designed to operate over a -40°C to +100°C junction
temperature (T
J
) range, but are tested and guaranteed only at
T
A
= +25°C.
Typical Application Circuits continued at end of data sheet.
Pin Configuration appears at end of data sheet.
MAX3969
200Mbps SFP Limiting Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Power-Supply Voltage Range (V
CC
, V
CCO
) ..........-0.5V to +7.0V
Voltage at FILTER, RSSI, IN+, IN-, CZP, CZN, SQUELCH,
INV, V
TH
..................................................-0.5V to (V
CC
+ 0.5V)
TTL Output Current (LOS,
LOS) .........................................±9mA
PECL Output Current (OUT+, OUT-, SD) .........................±50mA
Differential Voltage Between CZP and CZN..........-1.5V to +1.5V
Differential Voltage Between IN+ and IN- .............-1.5V to +1.5V
Continuous Power Dissipation (T
A
= +85°C)
20-Pin Thin QFN (derate 16.9mW/°C above +85°C) ....1099mW
Operating Junction Temperature Range (die).....-40°C to +150°C
Die Attach Temperature...................................................+400°C
Storage Temperature Range .............................-50°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.97V to +5.5V, PECL outputs terminated with 50Ω to V
CC
- 2V, R1 = 100kΩ, T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER CONDITIONS
MIN
MAX
UNITS
Supply Current PECL outputs open 22 45 mA
LOS Hysteresis Input = 4.0mV
P-P
(Note 2) 3.0 5 8.0 dB
Squelch Input Current 27 100 µA
PECL Output-Voltage High (Note 3)
-1085 -880
mV
PECL Output-Voltage Low (Note 3)
-1830 -1550
mV
Input = 7mV
P-P
or 90mV
P-P
, 0°C to +85°C
-3.0 +3.0
dB
LOS Assert Accuracy
Input = 7mV
P-P
or 90mV
P-P
, -40°C to +85°C -3.6 +3.6
dB
Minimum LOS Assert Input 2.7
mV
P-P
Maximum LOS Deassert Input
143
mV
P-P
Input Sensitivity (Note 4) 1 4
mV
P-P
Input Overload (Note 4)
1500
mV
P-P
TTL Output High R
LOS
= 4.7kΩ to 10kΩ 2.4 3.0 V
TTL Output Leakage (Note 5) 1 20 µA
TTL Output Low I
OL
= 800µA 0.2 0.5 V
Data Output Transition Time 20% to 80%, Input > 4mV
P-P
(Note 4)
0.35
0.8
1.20
ns
Pulse-Width Distortion Input > 4mV
P-P
(Notes 4, 6) 50 250 ps
LOS, SD Assert/Deassert Time C
FILTER
= 0.01µF 10 µs
Note 1: Dice are tested and guaranteed only at T
A
= +25°C.
Note 2: LOS hysteresis = 20log(V
LOS-DEASSERT
/ V
LOS-ASSERT
).
Note 3: Relative to supply voltage (V
CCO
).
Note 4: AC characteristics are guaranteed by design and characterization.
Note 5: Input < LOS threshold (LOS = HIGH), V
LOS
= 2.4V.
Note 6: Pulse-width distortion = [(width of wider pulse) - (width of narrower pulse)] / 2, measured with 100Mbps 1-0 pattern.
MAX3969
200Mbps SFP Limiting Amplifier
_______________________________________________________________________________________ 3
Typical Operating Characteristics
(V
CC
= +3.3V, PECL outputs terminated with 50Ω to V
CC
- 2V, R1 = 100kΩ, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
(PECL OUTPUTS OPEN)
MAX3969 toc01
AMBIENT TEMPERATURE (°C)
SUPPLY CURRENT (mA)
603510-15
5
10
15
20
25
30
35
40
45
50
55
60
0
-40 85
1ns/div
OUTPUT EYE DIAGRAM
(V
IN
= 2mV
P-P
, 155Mbps, 2
23
- 1 PRBS)
200mV/div
MAX3969 toc02
1ns/div
OUTPUT EYE DIAGRAM
(V
IN
= 1500mV
P-P
, 155Mbps, 2
23
- 1 PRBS)
200mV/div
MAX3969 toc03
TRANSFER FUNCTION
MAX3969 toc04
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
DIFFERENTIAL OUTPUT VOLTAGE (mV
P-P
)
10001001010.1
800
1000
1200
1400
1600
1800
600
0.01 10,000
BIT ERROR RATIO vs. DIFFERENTIAL
INPUT VOLTAGE
MAX3969 toc05
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
BIT ERROR RATIO
0.4
10-03
0
10-04
10-05
10-06
10-07
10-08
10-09
10-10
10-11
10-12
0.1
0.2
0.3
0.5
0.6
0.7
0.8
155Mbps
2
23
- 1 PRBS
RSSI VOLTAGE vs. DIFFERENTIAL
INPUT VOLTAGE
MAX3969 toc06
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
V
RSSI
(V)
10010
1.20
1.40
1.60
1.80
2.00
2.20
2.40
2.60
2.80
3.00
1.00
11000
RSSI LOAD > 10kΩ
155Mbps
2
23
- 1 PRBS
LOS LOW
LOS HIGH
1.4
1.6
1.5
1.9
1.8
1.7
2.2
2.1
2.0
2.3
-40 0 20-20 40 60 80 100
RSSI VOLTAGE vs. TEMPERATURE
(LOS LOW, RSSI LOAD > 10kΩ)
MAX3969 toc07
AMBIENT TEMPERATURE (°C)
V
RSSI
(V)
INPUT = 100mV
P-P
INPUT = 50mV
P-P
INPUT = 10mV
P-P
INPUT = 5mV
P-P
POWER-DETECT THRESHOLD vs. R2
(R1 = 100kΩ)
MAX3969 toc08
R2 (kΩ)
DIFFERENTIAL INPUT VOLTAGE (mV
P-P
)
1101009080706050403020
10
100
1000
1
10 120
SD LOW/
LOS HIGH
SD HIGH/
LOS LOW
155Mbps
2
23
- 1 PRBS
0
3
2
1
4
5
6
7
8
9
10
-40 10-15 35 60 85
LOSS-OF-SIGNAL HYSTERESIS
vs. TEMPERATURE
MAX3969 toc09
AMBIENT TEMPERATURE (°C)
20log (V
DEASSERT
/ V
ASSERT
) (dB)
155Mbps
2
23
-1 PRBS
R2 = 10kΩ
R2 = 50kΩ
P1-P3P4-P6P7-P9P10-P11

MAX3969ETP+T

Mfr. #:
Buy MAX3969ETP+T
Manufacturer:
Maxim Integrated
Description:
Limiting Amplifiers 270Mbps SFP LED
Lifecycle:
New from this manufacturer.
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