MAX3600CTL+ ,Laser Driver for ProjectorsELECTRICAL CHARACTERISTICS(V = 3.3V Q5%, T = 0NC to +70NC, T P +125NC, EN_MAIN high, V R 0.9V, unle ..
MAX361CSE ,Precision, Quad, SPST Analog SwitchesGeneral Description ________
MAX361CSE+ ,Precision, Quad, SPST Analog SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = 15V, V- = -15V, GND = 0V, V = 2.4V, V = 0.8V, T = T t ..
MAX361EJE ,Precision, Quad, SPST Analog SwitchesFeatures' Low On Resistance: < 45Ω Typical (85Ω Max)The MAX361/MAX362 are precision, quad, single-p ..
MAX361EPE ,Precision, Quad, SPST Analog SwitchesApplicationsMAX362CPE 0°C to +70°C 16 Plastic DIPSample-and-Hold CircuitsMAX362CSE 0°C to +70°C 16 ..
MAX361ESE ,Precision, Quad, SPST Analog SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = 15V, V- = -15V, GND = 0V, V = 2.4V, V = 0.8V, T = T t ..
MAX7231BFIPL ,Triplexed LCD Decoder/Drivers7 --'----
MAX7231CFEPL ,8-Digit, Triplexed LCD Decoder DriverFeatures
. MAX7231 drives 8 digits/7 segments; parallel
input format; 2 annunciators per digi ..
MAX7231CFIPL ,Triplexed LCD Decoder/DriversGeneral Description
The MAX7231/32/33/34 family of integrated circuits
is a complete line of tr ..
MAX7233AFIPL ,Triplexed LCD Decoder/Driversapplications where power
consumption is a primary concern. Many applica-
tions also take advantag ..
MAX7233BFIPL ,Triplexed LCD Decoder/DriversFeatures
. MAX7231 drives 8 digits/7 segments; parallel
input format; 2 annunciators per digi ..
MAX7234BFIPL ,Triplexed LCD Decoder/Driversapplications where power
consumption is a primary concern. Many applica-
tions also take advantag ..
MAX3600CTL+
Laser Driver for Projectors
Laser Driver for Projectors
General Description
The MAX3600 laser driver for projectors supports video
imaging with red, blue, and green lasers. Each output
includes a 10-bit video digital-to-analog converter (DAC)
with programmable gain and offset. For operation with
synthetic green lasers, the driver includes a periodic off
function and a fourth output with a random-noise generator.
The MAX3600B/R/G are monochrome drivers for blue,
red, and green lasers. The MAX3600A guarantees
higher full-scale output currents than the MAX3600, and
is recommended for new designs.
Applications
RGB Pico Laser Projector
Up to WXGA and 1080p Resolution Projectors
Monochrome Blue, Green, or Red Pico Laser
Projector
FeaturesIntegrates Four Current-Output Laser DriversCompatible with Red, Blue, and Green Lasers10-Bit Video DACs, fCLK = 1MHz to 160MHz8-Bit Gain and Offset DACs2ns Output Switching TimeSerial Port ControlLaser EnableRandom-Noise Generator and Periodic Off5mm x 5mm, 40-Pin TQFN Package (0.4mm Pitch)
19-4720; Rev 2; 8/10
Simplified Functional Diagram
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
†Not recommended for new designs.
††Future product—contact factory for availability.
Typical Operating Circuits and Pin Configuration appear at
end of data sheet.
MAX3600
MAX3600A
VIDEO1
SYNC
10-BIT VIDEO
3-WIRE BUS
OUTPUT ENABLE
OUT1
OUT2
OUT4
OUT3
VCCD+VCC
BLUE LASER
VCCA
VEE_T, VEE
VA2
VA1
VA4
VA3
+VGREEN
+VRED
+VNOISE
+VBLUEVIDEO DEMULTIPLEXER
SERIAL PORT
CLK
REF
SDA
SCL
CONTROL LOGIC
EN_MAIN
OUTPUT 2
OUTPUT 1
VIDEO2
PRBS NOISE
GENERATOROUTPUT 4
PERIODIC OFF
OUTPUT 3VIDEO3
RED LASER
NOISE DIODE
GREEN LASER
PARTTEMP RANGEPIN-PACKAGE
MAX3600CTL+†0NC to +70NC40 TQFN-EP*
MAX3600ACTL+0NC to +70NC40 TQFN-EP*
MAX3600RCTL+††0NC to +70NC40 TQFN-EP*
MAX3600GCTL+††0NC to +70NC40 TQFN-EP*
MAX3600BCTL+††0NC to +70NC40 TQFN-EP*
Laser Driver for Projectors
MAX3600
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 Range, VCCA, VCCD ...................-0.3V to +4.0V
Voltage Range at VA1, VA2, VA4 ..........................-0.3V to +6.0V
Voltage Range at VA3 ..........................................-0.3V to +8.5V
Voltage Range at OUT1 ........................... -0.3V to (VA1 + 0.3V)
Voltage Range at OUT2 ........................... -0.3V to (VA2 + 0.3V)
Voltage Range at OUT3 ........................... -0.3V to (VA3 + 0.3V)
Voltage Range at OUT4 ........................... -0.3V to (VA4 + 0.3V)
Voltage Range (VA1 - VOUT1), (VA2 - VOUT2),
(VA4 - VOUT4) .........................................................0 to +6.0V
Voltage Range (VA3 - VOUT3) ....................................0 to +7.5V
Voltage Range at D0 to D9, SYNC, CLK, PO, SCL, SDA,
CS, EN_MAIN, VM, REF, VEE_T, RES ..-0.3V to (VCC + 0.3V)
Current at OUT1, OUT2, OUT3, OUT4 ....................See Table 3
Current at D0 to D9, SYNC, CLK, PO, SCL, SDA,
CS, EN_MAIN, VM, REF, VEE_T, RES .........................Q50mA
Current at REF ................................................................Q0.5mA
Continuous Power Dissipation (TA = +70NC)
40-Pin TQFN (derate 35.7mW/NC above +70NC) .......2857mW
Storage Temperature Range ............................-40NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ELECTRICAL CHARACTERISTICS
(VCC = 3.3V Q5%, TA = 0NC to +70NC, TJ P +125NC, EN_MAIN high, VC_ R 0.9V, unless otherwise noted.) (Note 1, Equation 1)
ABSOLUTE MAXIMUM RATINGS
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VIDEO DAC (10 BITS)
Maximum Conversion Rate100160Msps
Settling Time(Note 2)4ns
Rise/Fall Time (20% to 80%)(Note 2)1(4)ns
Analog Supply Voltage
VA1, VA2,
VA4> 3.16.0
VA3OUT3 enabled> 4.08.5
OUT3 disabled> 3.18.5
Compliance VoltageVC_VC_ = VA_ - VOUT_0.5(6.0)V
Analog Supply Current
(IVA - IOUT) (Note 3, Figure 8)
IDAC_G0CLK static
OUT11831
OUT21834
OUT31926
OUT41523
IDAC_G13
IDAC_G2(30)80
GAIN DAC (8 BITS): VIDEO_ = 3FFh
Minimum Full-Scale Current
(gs_ = 00h)GLOW
OUT1(6)12(18)OUT2(15)40(60)
OUT3(3.5)10(15)
OUT4(3)10(25)
Maximum Full-Scale Current:
MAX3600
(gs_ = FFh)
GHIGH +
GLOW
OUT1175227(270)OUT2550690(850)
OUT3140170(200)
OUT4140185(230)
Maximum Full-Scale Current:
MAX3600A/R/G/B
(gs_ = FFh)
GHIGH +
GLOW
OUT1210280(330)OUT2630760(955)
OUT3140170(210)
Laser Driver for Projectors
MAX3600
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.3V Q5%, TA = 0NC to +70NC, TJ P +125NC, EN_MAIN high, VC_ R 0.9V, unless otherwise noted.) (Note 1, Equation 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Settling TimetSGTo 5% of final value10(50)Fs
OFFSET DAC (8 BITS): VIDEO_ = 00h, gs_ = 00h
Maximum Offset:
MAX3600/A/R/G/B OSHIGH
OUT16083(110)OUT2, OUT36583(110)
OUT4120155(200)
Offset ErrorOSLOWVOUT1, VOUT2, VOUT4 = 1.6V;
VOUT3 = 2.5V -25+0.2+25FA
Offset Settling TimetSOTo 5% of final value10(50)Fs
LOGIC I/O: SDA, SCL, CS, VM, EN_MAIN
Input High VoltageVIH1Operating conditionVCC -
VCC +
0.3V
Input Low VoltageVIL1Operating condition-0.3+0.3V
Input CurrentSDA (write), SCL, CS-10Q0.2+10FA
Input Resistance VM to VCCD2560100kIEN_MAIN to VEE2560100
Input CapacitanceSCL, CS, SDA, VM, EN_MAIN(1)pF
Input Hysteresis100mV
Enable/Disable Time
From serial port load < 10VMh to final value < 0.25
EN_MAINh to final value< 0.25
Disable TimetDISEN_MAINi to IOUTi0.01(1)Fs
Sink Current at SDARead mode, VSDA = 0.6V1016mA
VIDEO DATA INPUTS: D0 TO D9, CLK, SYNC, PO
Minimum FrequencyfCLK_MIN0.01(1)MHz
Maximum FrequencyfCLK_MAX(140)> 160MHz
Clock Duty CycleDDR clock, operating condition(45)(55)%Standard clock, operating condition(42)(58)
Setup TimetSUOperating condition(0.8)ns
Hold TimetHOperating condition(0.8)ns
Input Switching Time Operating condition (10% to 90%)1.5ns
Input Voltage RangeVIN-0.3VCC +
0.3V
Input High ThresholdVIH2Relative to VREF+170mV
Input Low ThresholdVIL2Relative to VREF-170mV
Reference VoltageVREFOperating condition0.83VCC/2V
Data Input CapacitanceCD0.4pF
Termination ResistorsRTTFigure 64509001500I
REF Input CurrentIREFVREF = VCC/2-5-1.2+5FA
Propagation DelayD0:D9 to OUT_, pixel clocks3
Laser Driver for Projectors
MAX3600
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.3V Q5%, TA = 0NC to +70NC, TJ P +125NC, EN_MAIN high, VC_ R 0.9V, unless otherwise noted.) (Note 1, Equation 1)
Note 1: Parameters in parentheses ( ) are provided for guidance, but are not tested or guaranteed.
Note 2: Figure 1 shows the AC test circuit. Settling time is defined from the 50% point of a transition to the greater of Q5% of
IFINAL or Q1% of ISWITCH. Control register gs_ ≥ 34. See Figure 18.
Note 3: IDAC ≈ G0 + IDAC_G1 x VD + IOUT/IDAC_G2, where VD is the average video bit density (Dbits/ns) as shown in Table 1.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
PO GENERATOR
Pixel Clock Range for POOperating condition24(102)MHz
Minimum PO Pulse WidthFour subpixels3.5ns
PLL Bandwidth(560)800(1040)kHz
PRBS OSCILLATOR
PRBS Oscillator FrequencyfPRBS1fPIXEL = 24MHz to 102MHz(100)(150)MHz
SERIAL PORT: SDA, SCL, CS (Figure 14)
Maximum Clock FrequencyfSCLWrite mode(25)MHz
Input Edge Time20% to 80%5ns
CS Leading TimetL(4)ns
SCL Pulse-Width HightCH20ns
SCL Pulse-Width LowtCL20ns
SCL to SDA Propagation DelaytD(10)ns
Data In Setup TimetDS(10)ns
Data In Hold TimetDH(10)ns
CS Trailing TimetT(10)ns
POWER SUPPLY: VCCA, VCCD
Supply Current
(IVCCA + IVCCD, gs_ = 80h,
os_ = 80h, fCLK = 75MHz)
IVCC1VIDEO_ = 1F0h, CLK_SEL = 0,
output disabled6280IVCC2CLK_SEL = 1, VIDEO_: 0 n 3FFh
repeating 6590
IVCC2_ENLOOutput disabled60(70)
POWER-ON RESET (Figure 15)
VCC for Chip EnabledVPOR1+2.9V
Power-On Reset Parameters
VPOR2+Voltage for output onVCC -
0.8VPOR2-Voltage for output offVCC -
VPOR3+Voltage for output on3.3
VPOR3-Voltage for output off3.2
IC Power-Up Time200Fs
Laser Driver for Projectors
MAX3600
Table 1. Example Calculation of Video Bit Density
Figure 1. Test Circuit
MAX3600
MAX3600A
VCCA
VCCD
VA1
VA2
VA3
VA4
VCC
ICC
VA1
VA2
VA3
VA4
CLK
SYNC
SDA
SCL
EN_MAIN
DATA
SOURCE
VL1
OUT1
PROBECC
VL2
OUT2
PROBECC
VL3
OUT3
PROBE
20ΩCC
VL4
OUT4
VEE
VEE_T
VL1 = 2.2V, VL2 = 1.2V,
VL3 = 3.5V, VL4 = 1.6V
PROBECC
PIXELTIME (ns)VIDEO CODEDBITSVD01111111111——100000000000101.020011111111190.9301000000000101.040100000000110.1
Laser Driver for Projectors
MAX3600
Typical Operating Characteristics
(VCC = 3.3V, TA = +25NC, EN_MAIN high, unless otherwise noted. VC_ = VA_ - VOUT_.)
VIDEO INL OUT3
MAX3600 toc09
LSB
gs3 = FFh, TJ = +125NC, VC_ = 0.9V
gs3 = 20h, TA = -40NC
VIDEO INL OUT2
MAX3600 toc08
LSB
gs2 = FFh, TJ = +125NC, VC_ = 0.9V
gs2 = 20h, TA = -40NC
VIDEO INL OUT1
MAX3600 toc07
LSB
gs1 = FFh, TJ = +125NC, VC_ = 0.9V
gs1 = 20h, TA = -40NC
VIDEO DNL OUT3
(gs3 = 20h, TA = -40°C)
MAX3600 toc06
VIDEO CODE
LSB
VIDEO DNL OUT2
(gs2 = 20h, TA = -40°C)
MAX3600 toc05
VIDEO CODE
LSB
VIDEO DNL OUT1
(gs1 = 20h, TA = -40°C)
MAX3600 toc04
VIDEO CODE
LSB
VIDEO DNL OUT3
(gs3 = FFh, TJ = +125°C, VC_ = 0.9V)
MAX3600 toc03
VIDEO CODE
LSB
VIDEO DNL OUT2
(gs2 = FFh, TJ = +125°C, VC_ = 0.9V)
MAX3600 toc02
VIDEO CODE
LSB
VIDEO DNL OUT1
(gs1 = FFh, TJ = +125°C, VC_ = 0.9V)
MAX3600 toc01
VIDEO CODE
LSB
-1.0
Laser Driver for Projectors
MAX3600
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25NC, EN_MAIN high, unless otherwise noted. VC_ = VA_ - VOUT_.)
TRANSFER FROM VA TO IOUT
MAX3600 toc18
T (%/V)
100k10k1k
1001M
gs_ = FFh, os_ = 0, VIDEO_ = 3FFh
T = DIOUT/IOUT x 100%/DVA_ (%/V)
OUT4
OUT2OUT3
OUT1
TRANSFER FROM VCC TO IOUT
MAX3600 toc17
T (%/V)100k10k1k
10010M
OUT2
OUT3
OUT4OUT1
gs_ = 80h, os_ = 40h, VIDEO_ = 1FFh
T = DIOUT/IOUT x 100%/DVCC (%/V)
OUT2 PO PULSE
(fCLK = 50MHz)
MAX3600 toc16
250mA/div
OFFSET INL
MAX3600 toc15
OFFSET CODE
LSB
OUT2, OUT3, OUT4
OUT1
gs_ = 00h, VIDEO_ = 00h
OFFSET DNL
MAX3600 toc14
OFFSET CODE
LSB
OUT1, OUT2, OUT3, OUT4
gs_ = 00h, VIDEO_ = 00h
GAIN INL
MAX3600 toc13
GAIN CODE
LSB
OUT2, OUT3
VIDEO_ = 3FFh
OUT4
OUT1
GAIN DNL
MAX3600 toc12
GAIN CODE
LSB
OUT1, OUT2, OUT3, OUT4
VIDEO_ = 3FFh
VIDEO INL OUT4
MAX3600 toc11
VIDEO CODE
LSB
gs4 = FFh, TJ = +125°C, VC_ = 0.9V
gs4 = 20h, TA = -40°C
VIDEO DNL OUT4
MAX3600 toc10
VIDEO CODE
LSB
gs4 = FFh
Laser Driver for Projectors
MAX3600
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25NC, EN_MAIN high, unless otherwise noted. VC_ = VA_ - VOUT_.)
OUTPUT FALL TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc23
VC_ (V)
FALL TIME (ns)
gs_ = FFh, os_ = 0
OUT1
OUT2OUT3
OUT4
OUTPUT FALL TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc22
VC_ (V)
FALL TIME (ns)
gs_ = 40h, os_ = FFh
OUT2
OUT3
OUT1OUT4
OUTPUT RISE TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc21
VC_ (V)
RISE TIME (ns)
gs_ = FFh, os_ = 0
OUT3
OUT2
OUT4
OUT1
OUTPUT RISE TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc20
VC_ (V)
RISE TIME (ns)
gs_ = 40h, os_ = FFh
OUT1OUT2
OUT3OUT4
NORMALIZED OUTPUT CURRENT
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc19
VC_ (V)
NORMALIZED AMPLITUDE (%)
gs_ = FFh, os_ = 0
VIDEO IS SQUARE WAVE: 3FFh (HIGH), 0 (LOW)
OUT2
OUT3
OUT4
OUT1
Laser Driver for Projectors
MAX3600
Pin Description
PINNAMEFUNCTIOND0
Synchronous Video Data Inputs. D0 is the LSB; D9 is the MSB.D1D2D3D4D5D6D7D8D9SYNCPixel Clock Input in Configuration 1. See the Typical Operating Circuits.CLKVideo Clock InputRESReserved for Future Use. Leave open. OUT3Connect to Blue Laser Anode. If unused leave open. Available on the MAX3600/A/B only.VA3Blue Laser Supply Voltage
16, 24, 32VEEGround Connections. Connect to 0V. SDAData I/O for Serial PortCSActive-Low Chip SelectSCLClock Input for Serial PortEN_MAINLaser Enable Input. When low, laser current is reduced (3.3V CMOS input with 60kI resistor to VEE). VEE_TTest. Connect to VEE for normal operation.VA4Noise Diode Supply VoltageOUT4Connect to Noise Diode Anode. If unused, leave open. Available on the MAX3600/A/G only.
25, 27, 29VA2Green Laser Supply Voltage
26, 28, 30OUT2Connect to Green Laser Anode. If unused, leave open. Available on the MAX3600/A/G only.N.C.No Connection. There is no connection from the package to the IC. VMVideo Marker Input. 3.3V CMOS input with 60kI pullup to VCCD.VCCA3.3V Analog Supply. Connect directly to VCCD.
35, 37VA1Red Laser Supply VoltageOUT1Connect to Red Laser Anode. If unused, leave open. Available on the MAX3600/A/R only.VCCD3.3V Digital Supply. Connect directly to VCCA. REFReference Threshold Voltage for Synchronous InputsPO
Periodic Off Video Data Input. If the periodic off feature is not used, connect the PO pin to ground
through a resistor. For periodic off on every pixel, connect PO to VCC through a resistor. (RPO ≈
2.2kI is suitable for all configurations. The resistor is optional, but reduces power.) EPExposed Pad. The exposed pad must be connected to VEE.
Laser Driver for Projectors
MAX3600
Detailed Description
The laser driver for projectors supports video imaging
with red, blue, and green lasers. Each output includes
a 10-bit video DAC with programmable gain and offset.
OUTPUT1, OUTPUT2, and OUTPUT3 support opera-
tion with red, green, and blue lasers. OUTPUT4 and
the PRBS generator provide noise as required for cer-
tain synthetic green lasers. The MAX3600R (Figure 3),
MAX3600G (Figure 4), and MAX3600B (Figure 5) are
monochrome laser drivers.
Figure 2. MAX3600/MAX3600A Functional Diagram
REF
CLK
SYNC
CLK
SYNC
MAX3600
MAX3600A
VIDEO
OFFSET
GAIN
os1
gs1VSEL1EN1
OUTPUT1
(RED)OUT1
VIDEO
OFFSET
GAIN
os3
gs3fPIXEL
fPRBS
VSEL3EN3
OUTPUT3
(BLUE)OUT3
CLK_SEL
PRBS_SEL
VIDEO
OFFSET
GAIN
os4
gs4
VM_ENiENi
PORi
OUT_ENi
VSEL4
PRBS
EN4
EN2
EN1
fPIXEL
EN3
EN4
fPIXEL
PO_M
po_srt
po_stp
PO_DIS
POR1
POR2
POR3
POR4
OUTPUT4
(NOISE)OUT4
EN_MAIN
VEE_T
VEE
os2
gs2
EN2
PERIODIC_OFF
PERIODIC_OFF
VIDEO
OFFSET
GAINAND
AND
ENABLE LOGIC (i = 1, 2, 3, 4)
CONTROL LOGICVIDEO
BUFFERS
OUTPUT2
(GREEN)OUT2
VCCD
VCCA
VA2
VA1
VA3
VA4
+VCC
+VCC
+VGREEN
+VRED
+VBLUE
+VNOISE
VIDEO1
fPIXEL
PRBS_N
PO_M
VIDEO
DEMULTIPLEXER
GENERATOR
PRBS
GENERATORPRBS
OSCILLATOR
SERIAL PORTPOWER-ON
RESETVIDEO2
VIDEO3
PO_M
PRBS_N
PO_DIS
po_stp
po_srt
VSEL1,3,4
OUT_EN1,2,3,4
gs1,2,3,4
os1,2,3,4
VM_EN1,2,3,4
fPRBS1
SDA
SCL
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.D0:D9
fCLKfPIXEL
Laser Driver for Projectors
MAX3600
Figure 3. MAX3600R Functional Diagram
Figure 5. MAX3600B Functional Diagram
MAX3600RD0
OUT1
EN_MAIN
VEE_T, VEE
VA3
VA2
VA1+VRED
+3.3V
VA4
VCCA
VCCD
VIDEO
BUFFERS
SERIAL PORTCONTROL
LOGICSDA
SCL
SYNC
CLK
REF
RED
LASERVIDEO
OUTPUT1
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
OFFSET
GAIN
os1
gs1
EN1
MAX3600G
OUT2
EN_MAIN
VEE_T, VEE
VA3
VA1
VA2+VGREEN
+3.3V
VA4
VCCA
VCCD
VIDEO
BUFFERS
SERIAL PORT
PRBS NOISE GENERATOR
CONTROL
LOGICSDA
SCL
SYNC
CLK
REF
GREEN
LASERVIDEO
OUTPUT2
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
OFFSET
GAIN
os2
gs2
EN2
OUT4
NOISE
LASEREN
OUTPUT4OFFSET
GAIN
VIDEO
os4
gs4
EN4
MAX3600BD0
OUT3
EN_MAIN
VEE_T, VEE
VA2
VA1
VA3+VBLUE
+3.3V
VA4
VCCA
VCCD
VIDEO
BUFFERS
SERIAL PORTCONTROL
LOGICSDA
SCL
SYNC
CLK
REF
BLUE
LASERVIDEO
OUTPUT3
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
OFFSET
GAIN
os3
gs3
EN3
Laser Driver for Projectors
MAX3600
Video Input Buffers
The synchronous video data inputs (D0 to D9, SYNC,
CLK, and PO) are pseudo-differential. Each input is com-
pared to VREF, as shown in Figure 6.
D0 to D9, PO, and SYNC can be left open. SYNC can
be connected to REF if not used (for reduced power
consumption).
Video Demultiplexer
The video demultiplexer (Figure 7) can accommo-
date configurations as shown in the Typical Operating
Circuits. In Configuration 1 (Figure 19), 10-bit red, green,
and blue video data is time multiplexed. The SYNC sig-
nal is used to demultiplex the video data.
In Configuration 2 (Figure 21), each output driver uses
VIDEO2 as a data source.
Driver Outputs
The driver outputs provide currents to the lasers as
shown in Figure 8.
The transfer characteristic of the driver outputs is shown
in Figure 10 and Equation 1.
Equation 1:
HIGHHIGHOUTLOWLOWGgsOSosVIDEOIGOS3FFhFFhFFh××−=+++
where:
• Current into the laser driver is positive (out is negative)
• VIDEO is the 10-bit video input
• gs is the 8-bit gain setting register
• os is the 8-bit offset setting register
• GLOW is the minimum gain (mA)
• (GLOW + GHIGH) is the maximum gain (mA)
• OSHIGH is the maximum offset (mA)
• OSLOW is the minimum offset (mA)
The output compliance voltage (VC_ = VA_ - VOUT_,
Figure 9) defines the output voltage required to obtain
low overshoot and fast settling time.
Table 2 summarizes the typical output current capability
for each driver output. Table 3 summarizes the maximum
ratings for each driver output.
Table 2. Driver Output Typical Parameter
Summary
Table 3. Driver Output Absolute
Maximum Ratings (Current Out of Part)
VDDQ
VIDEO DATA
(LVCMOS)
RTT2RTT
RTT
REFVDDQ/2
D0–D9,
CLK, PO,
SYNC
VIDEO BUFFER
VIDEO
PROCESSORMAX3600
MAX3600A
MAX3600R
MAX3600G
MAX3600B
PARAMETEROUT1
(mA)
OUT2
(mA)
OUT3
(mA)
OUT4
(mA)
Minimum Gain (GLOW)12401010
Maximum Gain
(GLOW + GHIGH)227690170185
Maximum Offset
(OSHIGH)838383155
PARAMETEROUT1
(mA)
OUT2
(mA)
OUT3
(mA)
OUT4
(mA)
DC Current
(TJ = +125NC)320735245310
DC Current
(TJ = +110NC)4801100382465
Peak Current
(t < 1Fs, TJ = +125NC)6401470490620
