19-3278; Rev 1; 7/04
150Mbps Automotive Fiber Optic Receivers
General Description
The MAX3901/MAX3902 are optimized for low-cost
polymer-clad silica (PCS) and plastic optical fiber (POF)
automotive receivers. These parts operate over an
extended -40°C to +140°C (junction) temperature range.
The MAX3901 features a 1.2µA to 1mA input range, a
+3.3V or +5V supply voltage, operation from 8Mbps to
50Mbps, and a TTL output compatible with common
automotive optical network interfaces.
The MAX3902 features a 1.2µA to 1mA input range,
+3.3V supply voltage, operation from 40Mbps to
150Mbps, and a differential output compatible with
LVDS, PECL, and IEEE 1394b (S100β).
Both circuits provide an input power detect and low-
power standby mode with status output. No filter
capacitors are required in the optical subassembly,
thus enabling a low-cost receiver design. The circuits
are available in die and wafer form.
o
Operation Up to 50Mbps (MAX3901)
o
Operation Up to 150Mbps (MAX3902)
o
+3.3V or +5.0V Power Supply (MAX3901)
o
1.2µA
P-P
Input Sensitivity
o
1mA
P-P
Input Overload
o
Input Power Detect with Power-Reducing Standby
Mode
o
Active Output Pulldown During Standby Mode
(MAX3901)
o
Differential LVDS- or PECL-Compatible Output
(MAX3902)
o
TTL-Compatible Output (MAX3901)
o
No Filter Capacitors Required in the Optical
Subassembly
Features
o
-40°C to +140°C Operating Junction Temperature
MAX3901/MAX3902
Applications
Automotive Fiber Optic Receivers
IEEE 1394b (S100β)
PART
MAX3901E/D
MAX3902E/D
Ordering Information
TEMP RANGE
-40°C to +140°C
-40°C to +140°C
PIN-PACKAGE
Dice*
Dice*
*Dice
are designed to operate over a -40°C to +140°C junction
temperature (T
j
) range, but are tested and guaranteed at T
A
=
+75°C.
Typical Operating Circuits
+5.0V
OPTICAL RECEIVER
V
CC
FILT
STATUS
STATUS
FILT
V
CC
SUPPLY
FILTER
OPTICAL RECEIVER
V
CC
STATUS
SUPPLY
FILTER
+3.3V
+3.3V
SWITCHED
MAX3901
IN
OUT_TTL
RX DATA
TTL INPUT
(SP4 AUTOMOTIVE
NETWORK INTERFACE)
IN
MAX3902
OUT+
OUT-
82Ω
0.1µF
82Ω
PECL
INPUT
0.1µF
130Ω
130Ω
GND
GND
GND
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________
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.
150Mbps Automotive Fiber Optic Receiver
MAX3901/MAX3902
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
) ...............................................-0.5V to +6V
Current into IN ....................................................................±3mA
Voltage at OUT+, OUT- (MAX3902) .............................0V to +6V
Current into OUT_TTL (MAX3901)....................................±10mA
Current into FILT ..................................................................-3mA
Voltage at STATUS .......................................-0.5V to (V
CC
+ 0.5)
Operating Junction Temperature Range ............-55°C to +150°C
Storage Temperature Range .............................-65°C to +175°C
Die Attach Temperature...................................................+400°C
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.
ELECTRICAL CHARACTERISTICS—MAX3901
(V
CC
= +3.135V to +5.25V, C
PD
= 2pF; T
j
= -40°C to +140°C. Typical values are at V
CC
= +5.0V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
POWER SUPPLY
Operating Power-Supply Current
Standby Current
Power-Up Time
INPUT PARAMETERS
Data Rate
Input Extinction Ratio
Input Sensitivity
Input Overload
Input Bias Voltage
FILT PIN
Voltage at FILT
Filter Resistor
Output High
Output Low
Output Voltage During Standby
Output Switching Time
Pulse-Width Variation
Average Pulse-Width Distortion
Data-Dependent Jitter
Uncorrelated Jitter (Random Jitter)
POWER DETECT (STATUS)
Input for STATUS High
Input for STATUS Low
STATUS Low Voltage
STATUS High Voltage
I
STH
I
STL
V
STATUS-L
V
STATUS-H
Standby mode
Operating mode
I
STATUS
< 1mA
I
STATUS
> -25µA
I
STATUS
> -20µA, V
CC
≥
4.75V
2.4
4
50
160
210
630
0.4
nA
nA
V
V
t
r
, t
f
PWV
PWD
DDJ
RJ
V
FILT
R
FILT
V
OH
V
OL
STATUS = high, I
OUT
= 30µA
10% to 90%, data rate
≤
45Mbps
45Mbps (Notes 1, 3), 1.2µA
P-P
≤
i
IN
≤
1mA
P-P
45Mbps (Notes 1, 3)
(Notes 1, 4)
i
IN
≥
1.2µA
P-P
(Note 1)
0.86
-0.07
0.035
0.007
2.5
I
FILT
= -600µA, referenced to V
CC
-0.35
100
2.7
0.3
0.06
5
0.4
0.4
8.5
1.14
+0.07
0.082
0.015
-0.45
V
kΩ
V
V
V
ns
UI
UI
UI
UI
RMS
V
IN
E
r
Maximum 3 CIDs
10log (P1 / P0)
(Notes 1, 2)
I
IN
≤
600µA
1.0
0.8
1.0
8
3
0.4
1.2
50
Mbps
dB
µA
P-P
mA
P-P
V
I
CC
I
STBY
t
PU
T
J
< +100°C
T
J
< +140°C
T
J
< +85°C
T
J
< +125°C
From valid V
CC
to STATUS low
0.06
10
14
22
28
20
80
1
mA
µA
ms
SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
DATA OUTPUT (OUT_TTL)
R
LOAD
= 50kΩ to GND, C
OUT
= 15pF
2
_______________________________________________________________________________________
150Mbps Automotive Fiber Optic Receiver
ELECTRICAL CHARACTERISTICS—MAX3901 (continued)
(V
CC
= +3.135V to +5.25V, C
PD
= 2pF; T
j
= -40°C to +140°C. Typical values are at V
CC
= +5.0V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
STATUS Resistance
Power-Detect Time
SYMBOL
R
STATUS
t
OP
t
STBY
Transition to operating mode (Note 5)
Transition to standby mode (Note 6)
CONDITION
MIN
10
TYP
16
0.2
16
MAX
24
0.5
100
UNIT
kΩ
ms
µs
MAX3901/MAX3902
Note 1:
Guaranteed by design and characterization.
Note 2:
BER = 1E-9, biphase-coded data containing three consecutive, identical digits. Waveform shaped by 39MHz four-pole filter.
Note 3:
See Figure 1. V
TH
is 1.5V for the MAX3901, 0V for (AC-coupled) differential output from the MAX3902. Data is biphase-coded
with three consecutive, identical digits added. Data input to the MAX3901 is shaped by a 39MHz four-pole filter. Data input to
the MAX3902 is shaped by a 117MHz four-pole filter.
Maximum PWV = MAX [t1
max
, t2
max
- 1UI, t3
max
- 2UI].
Minimum PWV = MIN [t1
min
, t2
min
- 1UI, t3
min
- 2UI].
Minimum PWD = MIN [(t
n-max
+ t
n-min
-2 x n x UI)/2], where n = 1, 2, 3.
Maximum PWD = MAX [(t
n-max
+ t+
n-min
-2 x n x UI)/2], where n = 1, 2, 3.
Note 4:
Data-dependent jitter is measured as shown in
MOST Specification of Physical Layer,
Version 1.1, data rate = 45Mbps.
Note 5:
Time from I
IN
> I
STL
to STATUS = low, C
STATUS
< 10pF.
Note 6:
Time from I
IN
< I
STH
to STATUS = high, C
STATUS
< 10pF.
t
3max
t
2max
t
1max
V
TH
t
1min
t
2min
t
3min
TRIGGER ON RISING EDGE
Figure 1. PWV and PWD Timing Diagrams
_______________________________________________________________________________________
3
150Mbps Automotive Fiber Optic Receiver
MAX3901/MAX3902
ELECTRICAL CHARACTERISTICS—MAX3902
(V
CC
= +3.0V to +3.6V, C
PD
= 2pF; T
j
= -40°C to +140°C. Typical values are at V
CC
= +3.3V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
POWER SUPPLY
Operating Power-Supply Current
Standby Current
Power-Up Time
INPUT PARAMETERS
Data Rate
Input Extinction Ratio
Input Sensitivity
Input Overload
Input Bias Voltage
FILT PIN PARAMETERS
Voltage at FILT
Filter Resistor
DIFFERENTIAL OUTPUT
Differential Signal Output
Output Resistance
Output Switching Time
Deterministic Jitter
V
OUT
R
OUT
t
r
, t
f
DJ
Total signal measured between the
two outputs
Single ended
10% to 90%, i
IN
≥
2µA
P-P
(Notes 1, 8)
i
IN
= 2.0µA
P-P
, E
r
= 3dB,
input filter 117MHz (Note 1)
Random Jitter
RJ
i
IN
= 2µA
P-P
, E
r
= 10dB,
input filter = 117MHz
Pulse-Width Variation
Average Pulse-Width Distortion
Data-Dependent Jitter
POWER DETECT (STATUS)
Input for STATUS High
Input for STATUS Low
STATUS Low Voltage
STATUS High Voltage
STATUS Resistance
Power-Detect Time
I
STH
I
STL
V
STATUS-L
V
STATUS-H
R
STATUS
t
OP
t
STBY
Transition to operating mode (Note 5)
Transition to standby mode (Note 6)
Standby mode
Operating mode
I
STATUS
< 1mA
I
STATUS
> -25µA
2.4
10
16
0.2
16
24
0.5
100
50
160
210
630
0.4
nA
nA
V
V
kΩ
ms
µs
PWV
PWD
DDJ
(Notes 1, 3) 2µA
P-P
≤
i
IN
≤
1mA
P-P
(Notes 1, 3)
(Notes 1, 4)
0.88
-0.045
0.01
122
1.12
+0.042
0.071
UI
UI
UI
600
85
800
100
1.5
0.03
135
1000
115
2.5
0.10
215
ps
RMS
mV
P-P
Ω
ns
UI
V
FILT
R
FILT
I
FILT
= -600µA, referenced to V
CC
-0.35
100
-0.45
V
kΩ
V
IN
E
r
Maximum 5 CIDs
10log (P1 / P0)
(Notes 1, 7)
I
IN
≤
600µA
1.0
0.75
1.0
40
3
1.2
150
Mbps
dB
µA
P-P
mA
P-P
V
I
CC
I
STBY
t
PU
T
J
< +85°C
T
J
< +125°C
From valid V
CC
to STATUS low
0.06
26
9
35
18
80
1
mA
µA
ms
SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
Note 7:
BER = 1E-9, test pattern is K28.5 (00111110101100000101), waveform shaped by a 117MHz four-pole filter.
Note 8:
Tested with K28.5 pattern at 45Mbps and 150Mbps, 2.0µA
P-P
< i
IN
< 1mA
P-P
, waveform shaped by 117MHz four-pole filter.
Deterministic jitter (DJ) is the peak-to-peak deviation from ideal time crossings, measured at the zero-level crossings of the
differential output.
4
_______________________________________________________________________________________
150Mbps Automotive Fiber Optic Receiver
MAX3901/MAX3902
MAX3901 Typical Operating Characteristics
(V
CC
= +5.0V, C
PD
= 2pF, test pattern is biphase-coded data with 3 CIDs at 50Mbps, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. TEMPERATURE
MAX3901/02 toc01
SUPPLY CURRENT DURING STANDBY
vs. TEMPERATURE
MAX3901/02 toc02
STATUS THRESHOLDS
vs. TEMPERATURE
MAX3901/02 toc03
35
30
SUPPLY CURRENT (mA)
25
20
15
10
5
0
-40 -20
0
20
40
60
35
30
SUPPLY CURRENT (µA)
25
20
15
10
5
0
350
300
INPUT CURRENT (nA)
250
200
150
100
50
STATUS = HIGH
STATUS = LOW
80 100 120 140
-40 -20
0
20
40
60
80 100 120 140
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
FILTER VOLTAGE
vs. FILTER CURRENT
MAX3901/02 toc04
OUTPUT VOLTAGE vs. OUTPUT CURRENT
IN STANDBY MODE
350
OUTPUT VOLTAGE (mV)
300
250
200
150
100
50
MAX3901/02 toc05
5.0
400
4.6
FILTER VOLTAGE (V)
4.2
3.8
3.4
3.0
1µ
10µ
100µ
1m
FILTER CURRENT (A)
0
0
20
40
60
80
100
120
OUTPUT CURRENT (µA)
_______________________________________________________________________________________
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