MAX3812USA+T

General Description
The MAX3812 is a multirate SMPTE cable driver
designed to operate at data rates up to 1.485Gbps,
driving one or two 75 coaxial cables. Two selectable
slew rates are provided for compliance to SMPTE 292M,
SMPTE 344M, and SMPTE 259M. The MAX3812 is pin
compatible with the Gennum GS1528.
The MAX3812 inputs are internally biased and compatible
with differential swings of CML, LVPECL, and LVDS.
Output voltage swing is adjustable with a single
external resistor.
The MAX3812 operates over a 0°C to +85°C temperature
range. It typically consumes 106mW with a +3.3V power
supply and is available in an 8-pin SO package.
Applications
SMPTE 292M, SMPTE 344M, SMPTE 259M, and
DVB-ASI Coaxial Cable Serial Digital Interfaces
Professional Digital Video Switchers and Routers
Professional Digital Video Cameras and
Recording Devices
Features
SMPTE 292M, SMPTE 344M, SMPTE 259M, and
DVB-ASI Compliant
106mW Power Consumption Using a +3.3V Power
Supply
Smooth Rise/Fall Transitions for Low EMI
Selectable Slew Rate for HD and SD Rates
Pin Compatible with Gennum GS1528
Dual Coaxial Cable Driving Outputs
Adjustable Output Voltage Swing
Input Compatibility with Differential Swings of
CML, LVPECL, and LVDS
0°C to +85°C Operating Temperature Range
MAX3812
Multirate SMPTE SD/HD Cable Driver
with Selectable Slew Rate
________________________________________________________________ Maxim Integrated Products 1
SD/HD
V
CC
RSET
1
2
8
7
OUT+
OUT-IN-
GND
IN+
SO
TOP VIEW
3
4
6
5
MAX3812
Pin Configuration
Ordering Information
MAX3812
+3.3V
+3.3V
+3.3V
MAX3811
MULTIRATE
SMPTE
RECLOCKER
50
50
75
75
TRACE
TRACE
CABLE
CABLE
10nF
10nF
4.7µF
10nF
4.7µF
75
75
75
75
6.8nH*
6.8nH*
*TYPICAL VALUE VARIES WITH LAYOUT.
IN-
IN+
OUT-
OUT+
RSET
GND
V
CC
SD/HD
R
SET
750
FUTURE PRODUCT
CML
50
50
Typical Application Circuit
19-3571; Rev 0; 2/05
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.
+Denotes lead-free package. Contact factory for availability.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX3812USA 0°C to +85°C 8 SO
MAX3812USA+ 0°C to +85°C 8 SO
MAX3812
Multirate SMPTE SD/HD Cable Driver
with Selectable Slew Rate
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
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.
Supply Voltage (V
CC
) ............................................-0.5V to +4.0V
Voltage at IN+, IN-, RSET, SD/HD,
OUT+, OUT- ...........................................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +85°C)
8-Pin SO (derate 5.9mW/°C above +85°C)..................384mW
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
Supply Current I
CC
R
SET
= 750 32 45 mA
Power Consumption R
SET
= 750 106 mW
Output Common-Mode Voltage V
CMOUT
Figure 1, AC-coupled output
V
CC
-
V
OUT
V
Input Common-Mode Voltage V
CMIN
Figure 1
1.6 +
V
INDIFF
/ 4
V
CC
-
V
INDIFF
/ 4
V
SD/HD Input-High Voltage V
IH
2.0 V
SD/HD Input-Low Voltage V
IL
0.8 V
SD/HD Input-High Current I
IH
2.0V V
SD/HD
V
CC
-110 -40 µA
SD/HD Input-Low Current I
IL
0V V
SD/HD
0.8V -150 -90 µA
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
Serial Input Data Rate 19 1485 Mb/s
60Hz f
NOISE
27MHz 100
Supply-Noise Tolerance
27MHz < f
NOISE
1.5GHz 40
mV
P-P
1.485Gb/ 0.03 0.05
540Mb/s 0.04 0.07
Total Intrinsic Jitter (Notes 1, 2) TJ
19Mb/s, 143Mb/s, 177Mb/s, 270Mb/s,
360Mb/s
0.02 0.05
UI
P-P
20% to 80%, SD/HD = low 145 220
Output Rise/Fall Time t
r
, t
f
20% to 80%, SD/HD = high 450 675 750
ps
Mismatch in Rise/Fall Time (Notes 1, 3) 5 30 ps
Duty-Cycle Distortion (Notes 1, 3) 2 ps
Output Return Loss 5MHz to 1.485GHz (Note 4) 19 dB
Single-ended, R
SET
= 750, Figure 1 750 800 850
Single-ended, R
SET
= 570, Figure 1 1050Output Voltage Swing V
OUT
Single-ended, R
SET
= 1000, Figure 1 600
mV
P-P
Input Voltage Swing V
INDIFF
Differential, Figure 1 300 2000 mV
P-P
Input Rise/Fall Time 20% to 80% (Note 5) 230 ps
MAX3812
Multirate SMPTE SD/HD Cable Driver
with Selectable Slew Rate
_______________________________________________________________________________________ 3
Note 1: Guaranteed by design and characterization.
Note 2: Total intrinsic jitter is defined as the summation of deterministic jitter (DJ) and random jitter (RJ) using the formula:
TJ(UI
P-P
) = DJ(UI
P-P
) + 14.1 x RJ(UI
RMS
)
Note 3: Measured at 1.485Gb/s using a 0011 pattern.
Note 4: See the Output Return Loss graph in the Typical Operating Characteristics.
Note 5: Input signals must reach the full amplitude levels within the unit interval.
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, R
SET
= 750, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX3812 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
807050 6020 30 4010
10
20
30
40
50
60
70
80
90
100
0
090
SD/HD = LOW
SD/HD = HIGH
OUTPUT EYE DIAGRAM
(270Mb/s, SD/HD = HIGH)
MAX3812 toc02
0.8V
P-P
620ps/div
USING TYPICAL APPLICATION CIRCUIT
OUTPUT EYE DIAGRAM
(1.485Gb/s, SD/HD = LOW)
MAX3812 toc03
0.8V
P-P
112ps/div
USING TYPICAL APPLICATION CIRCUIT
150mV
P-P
MIN
1000mV
P-P
MAX
300mV
P-P
MIN
2000mV
P-P
MAX
800mV
P-P
(R
SET
= 750)
V
IN+
V
CMIN
V
INDIFF
= (V
IN+
) - (V
IN-
)
V
OUT+
V
CMOUT
V
OUT-
V
IN-
INPUT
VOLTAGE
OUTPUT
VOLTAGE
TIME
Figure 1. Definition of Input and Output Voltage

MAX3812USA+T

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Buffers & Line Drivers Integrated Circuits (ICs)
Lifecycle:
New from this manufacturer.
Delivery:
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