www.fairchildsemi.com TMC3033 Triple Video D/A Converter 10 bit, 80 Msps Features Description • • • • • • The TMC3033 is a high-speed triple 10-bit D/A converter especially suited for video and graphics applications. It offers 10-bit resolution, TTL-compatible inputs, low power consumption, and requires only a single +3.3 Volt ±5% power supply. It has single-ended current outputs, SYNC and BLANK control inputs, and a separate current source for adding sync pulses to the Green D/A converter output. It is ideal for generating analog RGB from digital RGB and driving computer display and video monitors. Three speed grades are available: 30, 50, and 80 Msps. 10-bit resolution 80, 50, and 30 megapixels per second Sync and blank controls Sync on green D/A output 1.0V p-p video into 37.5Ω or 75Ω load Enhancement of ADV7122 – Internal bandgap voltage reference – Double-buffered data for low distortion • TTL-compatible inputs • Low glitch energy • Single +3.3 Volt ±5% power supply The TMC3033 triple D/A converter is available in a 44-lead plastic J-leaded PLCC and 48-lead plastic LQFP package. It is fabricated on a sub-micron CMOS process with performance guaranteed from 0°C to 70°C. Applications • Video signal conversion – RGB – YCBCR – Composite, Y, C • Multimedia systems • Image processing • True-color graphics systems (1 billion colors) • Broadcast television equipment • High-Definition Television (HDTV) equipment • Direct digital synthesis Block Diagram SYNC BLANK G9-0 B9-0 R9-0 10 10 bit D/A Converter IOG 10 10 bit D/A Converter IOB 10 10 bit D/A Converter IOR CLK +1.235V Ref COMP RREF VREF 65-3003-01 Rev. 1.0.0 TMC3033 PRODUCT SPECIFICATION Functional Description The TMC3033 is a low-cost triple 10-bit CMOS D/A converter designed to directly drive computer CRT displays and video transmission lines at pixel rates of up to 80 Msps. It comprises three identical 10-bit D/A converters with registered data inputs, common clock, and internal voltage reference. An independent current source allows sync to be added to the green D/A converter output. Digital Inputs All digital inputs are TTL-compatible. Data are registered on the rising edge of the CLK signal. The analog output changes tDO after the rising edge of CLK. There is one stage of pipeline delay on the chip. The guaranteed clock rates of the TMC3033 are 80, 50, and 30 MHz. SYNC and BLANK SYNC and BLANK inputs control the output level (Figure 1 and Table 1) of the D/A converters during CRT retrace intervals. BLANK forces the D/A outputs to the blanking level while SYNC turns off a separate current source which is connected to the green D/A converter. This connection adds a 40 IRE sync pulse to the D/A output and brings that D/A output to 0.0 Volts during the sync tip. SYNC and BLANK are registered on the rising edge of CLK. BLANK gates the D/A inputs and sets the pedestal voltage. If BLANK = HIGH, the D/A inputs are added to a pedestal which offsets the current output. If BLANK = LOW, data inputs and the pedestal are disabled. data: 660 mV max. pedestal: 54 mV sync: 286 mV 65-3003-02 Figure 1. Nominal Output Levels 2 D/A Outputs Each D/A output is a current source. To obtain a voltage output a resistor must be connected to ground. Output voltage of the D/A converters depends upon this resistor, the reference voltage, and the value of the gain-setting resistor connected between RREF and GND. Normally, a source termination resistor of 75 Ohms is connected between the D/A current output pin and GND near the D/A converter. A 75 Ohm coaxial cable may then be connected with another 75 Ohm termination resistor at the far end of the cable. This “double termination” presents the D/A converter with a net resistive load of 37.5 Ohms. The TMC3033 may also be operated with a single 75 Ohm terminating resistor. To lower the output voltage swing to the desired range, the value of the resistor on RREF should be increased. Voltage Reference The TMC3033 has an internal bandgap voltage reference of +1.235 Volts. An external voltage reference may be connected to the VREF pin, overriding the internal voltage reference. All three D/A converters are driven from the same reference. A 0.1µF capacitor must be connected between the COMP pin and VDD to stabilize internal bias circuitry and ensure low-noise operation. Power and Ground The TMC3033 D/A converter requires a single +3.3 Volt power supply. The analog (VDD) power supply voltage should be decoupled to GND to reduce power supply induced noise. 0.1µF decoupling capacitors should be placed as close as possible to the power pins. The high slew-rate of digital data makes capacitive coupling to the outputs of any D/A converter a potential problem. Since the digital signals contain high-frequency components of the CLK signal, as well as the video output signal, the resulting data feedthrough often looks like harmonic distortion or reduced signal-to-noise performance. All ground pins should be connected to a common solid ground plane for best performance. PRODUCT SPECIFICATION TMC3033 Table 1. Output Voltage versus Input Code, SYNC, and BLANK VREF = 1.235 V, RREF = 572 Ω, RL = 37.5 Ω Red and Blue D/As Green D/A RGB9-0 (MSB...LSB) SYNC BLANK VOUT SYNC BLANK VOUT 11 1111 1111 X 1 0.7140 1 1 1.0000 11 1111 1110 X 1 0.7134 1 1 0.9994 11 1111 1101 X 1 0.7127 1 1 0.9987 • • • • • • • • • • • • • • 10 0000 0000 X 1 0.3843 1 1 0.6703 01 1111 1111 X 1 0.3837 1 1 0.6697 • • • • • • • • • • • • • • 00 0000 0010 X 1 0.0553 1 1 0.3413 00 0000 0001 X 1 0.0546 1 1 0.3406 00 0000 0000 X 1 0.0540 1 1 0.3400 xx xxxx xxxx X 0 0.0000 1 0 0.2860 xx xxxx xxxx X 0 0.0000 0 0 0.0000 9 37 10 36 PLCC 35 11 TMC3033 12 34 28 27 26 25 24 29 23 30 17 22 31 16 21 32 15 20 14 19 33 18 13 RREF VREF COMP IOR IOG VDD VDD IOB GND GND CLK G1 G2 G3 G4 G5 G6 G7 G8 G9 BLANK SYNC VDD 1 2 3 4 5 6 7 8 9 10 11 12 LQFP TMC3033 36 35 34 33 32 31 30 29 28 27 26 25 RREF VREF COMP IOR IOG OV DD VDD IOB GND GND CLOCK NC 13 14 15 16 17 18 19 20 21 22 23 24 38 NC B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 NC 39 8 48 47 46 45 44 43 42 41 40 39 38 37 40 41 42 43 1 44 2 3 4 7 VDD B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 G1 G2 G3 G4 G5 G6 G7 G8 G9 BLANK SYNC 5 6 G0 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0 G0 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0 NC Pin Assignments 3 TMC3033 PRODUCT SPECIFICATION Pin Descriptions Pin Number Pin Name PLCC LQFP Value Description Clock and Pixel I/O CLK 29 26 TTL Clock. The clock input is TTL-compatible and all pixel data is registered on the rising edge of CLK. It is recommended that CLK be driven by a dedicated TTL buffer to avoid reflection induced jitter, overshoot, and undershoot. R9-0 5, 4, 3, 2, 1, 44, 43, 42, 41, 40 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37 TTL Red pixel data inputs. The Red digital input is TTLcompatible and registered on the rising edge of CLK. G9-0 15, 14, 13, 48, 9, 8, 7, 6, 12, 11, 10, 9, 5, 4, 3, 2, 1 8, 7, 6 TTL Green pixel data inputs. The Green digital input is TTLcompatible and registered on the rising edge of CLK. B9-0 28, 27, 26, 25, 24, 23, 22, 21, 20, 19 23, 22, 21, 20, 19, 18, 17, 16, 15, 14 TTL Blue pixel data inputs. The Blue digital input is TTLcompatible and registered on the rising edge of CLK. 17 11 TTL Sync pulse Input. Bringing SYNC LOW, turns off a 40 IRE (7.62 mA) current source which forms a sync pulse on the Green D/A converter output. SYNC is registered on the rising edge of CLK along with pixel data and has the same pipeline latency as BLANK and pixel data. SYNC does not override any other data and should be used only during the blanking interval. Controls SYNC Since this is a single-supply D/A and all signals are positive-going, sync is added to the bottom of the Green D/A range. So turning SYNC OFF means turning the current source ON. When a sync pulse is desired, the current source is turned OFF. If the system does not require sync pulses from the Green D/A converter, SYNC should be connected to GND. BLANK 16 10 TTL Blanking Input. When BLANK is LOW, pixel inputs are ignored and the D/A converter outputs are driven to the blanking level. BLANK is registered on the rising edge of CLK and has the same pipeline latency as SYNC. IOR 36 33 0.714 Vp-p Red D/A output. The current source outputs of the D/A converters are capable of driving RS-343A/SMPTE-170M compatible levels into doubly-terminated 75 Ohm lines. IOG 35 32 1 V p-p Green D/A output. The current source outputs of the D/A converters are capable of driving RS-343A/SMPTE-170M compatible levels into doubly-terminated 75 Ohm lines. Sync pulses may be added to the Green D/A output. IOB 32 29 0.714 Vp-p Blue D/A output. The current source outputs of the D/A converters are capable of driving RS-343A/SMPTE-170M compatible levels into doubly-terminated 75 Ohm lines. Video Outputs 4 PRODUCT SPECIFICATION TMC3033 Pin Descriptions (continued) Pin Number Pin Name PLCC LQFP Value Description Voltage Reference VREF 38 35 +1.235 V Voltage Reference output/input. An internal voltage source of +1.235 Volts is output on this pin. An external +1.235 Volt reference may be applied here which overrides the internal reference. Decoupling VREF to GND with a 0.1µF ceramic capacitor is required. RREF 39 36 572 Ω Current-setting resistor. The full-scale output current of each D/A converter is determined by the value of the resistor connected between RREF and GND. The nominal value for RREF is found from: RREF = 9.1( VREF/IFS), but is optimized to be 572 Ω. IFS is the full-scale (white) output current (in amps) from an output without sync. Sync current is 0.4 * IFS. D/A full-scale (white) current may also be calculated from: IFS = VFS/ RL Where VFS is the white voltage level and RL is the total resistive load (in ohms) on each D/A converter. VFS is the blank to full-scale voltage. COMP 37 34 0.1 µF Compensation capacitor. A 0.1 µF ceramic capacitor must be connected between COMP and VDD to stabilize internal bias circuitry. Power and Ground VDD 18, 33, 34 12, 30, 31 +3.3 V Power supply GND 30, 31 27, 28 0.0 V Ground Equivalent Circuits VDD VDD p Digital Input n p VDD n OUT GND GND 27014C Figure 2. Equivalent Digital Input Circuit 27013B Figure 3. Equivalent Analog Output Circuit 5 TMC3033 PRODUCT SPECIFICATION Equivalent Circuits (continued) VDD p p RREF VREF 27012B GND Figure 4. Equivalent Analog Input Circuit Absolute Maximum Ratings (beyond which the device may be damaged)1 Parameter Min Typ Max Unit -0.5 7.0 V -0.5 VDD + 0.5 V -10.0 10.0 mA Applied Voltage (measured to GND)2 -0.5 VDD + 0.5 V Forced Current3,4 -60.0 60.0 mA infinite second 110 °C Junction 150 °C Lead Soldering (10 seconds) 300 °C Vapor Phase Soldering (1 minute) 220 °C 150 °C Power Supply Voltage VDD (Measured to GND) Inputs Applied Voltage (measured to GND)2 Forced Current3,4 Outputs Short Circuit Duration (single output in HIGH state to ground) Temperature Operating, Ambient Storage -20 -65 Notes: 1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if Operating Conditions are not exceeded. 2. Applied voltage must be current limited to specified range. 3. Forcing voltage must be limited to specified range. 4. Current is specified as conventional current flowing into the device. 6 PRODUCT SPECIFICATION TMC3033 Operating Conditions Parameter VDD Power Supply Voltage fS Conversion Rate Min Nom Max 3.135 3.3 Units 3.465 V TMC3033-30 30 Msps TMC3033-50 50 Msps TMC3033-80 80 Msps tPWH CLK Pulsewidth, HIGH 5.2 ns tPWL CLK Pulsewidth, LOW 5.2 ns ts Input Data Setup Time 3.6 ns th Input Date Hold Time 2 ns VREF Reference Voltage, External CC Compensation Capacitor RL Output Load VIH Input Voltage, Logic HIGH 2.0 VDD V VIL Input Voltage, Logic LOW GND 0.8 V TA Ambient Temperature, Still Air 0 70 °C Max Units TMC3033-30 90 mA TMC3033-50 95 TMC3033-80 132 1.0 1.235 1.5 V µF 0.1 Ω 37.5 Electrical Characteristics Conditions3 Parameter IDD PD Power Supply Total Power Current2 Dissipation2 Min Typ1 VDD = Max VDD = Max TMC3033-30 300 TMC3033-50 315 TMC3033-80 435 100 mW RO Output Resistance kΩ CO Output Capacitance IOUT = 0mA 30 pF IIH Input Current, HIGH VDD = Max, VIN = 2.4V -1 µA IIL Input Current, LOW VDD = Max, VIN = 0.4V 1 µA IREF VREF Input Bias Current ±100 µA VREF Reference Voltage Output VOC Output Compliance CDI Digital Input Capacitance 0 1.235 Referred to VDD -0.4 V 0 +1.5 V 4 10 pF Notes: 1. Values shown in Typ column are typical for VDD = +3.3V and TA = 25°C. 2. Minimum/Maximum values with VDD = Max and TA = Min. 3. VREF = 1.235V, RLOAD = 37.5Ω, RREF = 572Ω 7 TMC3033 PRODUCT SPECIFICATION Switching Characteristics Parameter Conditions2 VDD = Min Min Typ1 Max Units 10 15 ns 1 2 ns tD Clock to Output Delay tSKEW Output Skew tR Output Risetime 10% to 90% of Full Scale 3 4 ns tF Output Falltime 90% to 10% of Full Scale 3 4 ns tSET Output Settling Time to 3%/FS 15 ns Notes: 1. Values shown in Typ column are typical for VDD = +3.3V and TA = 25°C. 2. VREF = 1.235V, RLOAD = 37.5Ω, RREF = 572Ω. System Performance Characteristics Conditions2 Parameter Typ1 Max Units VDD, VREF = Nom ±0.1 ±0.25 %/FS Min ELI Integral Linearity Error ELD Differential Linearity Error VDD, VREF = Nom ±0.1 ±0.25 %/FS EDM DAC to DAC Matching VDD, VREF = Nom 7 10 % VOF Output Offset Current VDD = Max, R, G, B = 000h 20 mA PSR Power Supply Rejection 0.05 %/% Notes: 1. Values shown in Typ column are typical for VDD = +3.3V and TA = 25°C. 2. VREF = 1.235V, RLOAD = 37.5Ω, RREF = 572Ω. Timing Diagram t PWL 1/f S t PWH CLK tH tS PIXEL DATA & CONTROLS DataN DataN+1 DataN+2 3%/FS 90% tD OUTPUT 50% t SET tF tR 10% 65-3003-03 8 PRODUCT SPECIFICATION TMC3033 Applications Discussion Figure 4 illustrates a typical TMC3033 interface circuit. In this example, an optional 1.2 Volt bandgap reference is connected to the VREF output, overriding the internal voltage reference source. Grounding It is important that the TMC3033 power supply is wellregulated and free of high-frequency noise. Careful power supply decoupling will ensure the highest quality video signals at the output of the circuit. The TMC3033 has separate analog and digital circuits. To keep digital system noise from the D/A converter, it is recommended that power supply voltages (VDD) come from the system analog power source and all ground connections (GND) be made to the analog ground plane. Power supply pins should be individually decoupled at the pin. the power supply for the TMC3033 is the same as that of the system's digital circuitry, power to the TMC3033 should be decoupled with 0.1µF and 0.01µF capacitors and isolated with a ferrite bead. 3. The ground plane should be solid, not cross-hatched. Connections to the ground plane should have very short leads. 4. If the digital power supply has a dedicated power plane layer, it should not be placed under the TMC3033, the voltage reference, or the analog outputs. Capacitive coupling of digital power supply noise from this layer to the TMC3033 and its related analog circuitry can have an adverse effect on performance. 5. CLK should be handled carefully. Jitter and noise on this clock will degrade performance. Terminate the clock line carefully to eliminate overshoot and ringing. Printed Circuit Board Layout Designing with high-performance mixed-signal circuits demands printed circuits with ground planes. Overall system performance is strongly influenced by the board layout. Capacitive coupling from digital to analog circuits may result in poor D/A conversion. Consider the following suggestions when doing the layout: 1. Keep the critical analog traces (VREF, IREF, COMP, IOR, IOG, IOB) as short as possible and as far as possible from all digital signals. The TMC3033 should be located near the board edge, close to the analog output connectors. 2. The power plane for the TMC3033 should be separate from that which supplies the digital circuitry. A single power plane should be used for all of the VDD pins. If Related Products • • • • • • • • • • • TMC3503 Triple 8-bit 80 Msps D/A Converters TMC1175A 40 Msps CMOS 8-bit A/D Converter TMC1275 40 Msps CMOS 8-bit A/D Converter TMC22091, TMC22191 Digital Video Encoders TMC2242C/TMC2243/TMC2246A Video Filters TMC2249A Digital Mixer TMC2250A Matrix Multiplier TMC2272A Colorspace Converter TMC2302 Image Manipulation Sequencer TMC2340A Digital Synthesizer TMC2081 Digital Video Mixer +3.3V 10µF 0.1µF VDD RED PIXEL INPUT R9-0 GREEN PIXEL INPUT G9-0 BLUE PIXEL INPUT CLOCK SYNC BLANK B9-0 GND Red IO R IO G TMC3033 IO B ZO=75Ω 75Ω Green 75Ω Blue ZO=75Ω 75Ω 75Ω 75Ω Triple 10-bit D/A Converter +3.3V COMP CLK SYNC BLANK ZO=75Ω 75Ω 0.1µF 3.3kΩ 572Ω LM185-1.2 (Optional) VREF RREF 0.1µF 65-3033-04 Figure 4. Typical Interface Circuit 9 TMC3033 PRODUCT SPECIFICATION Mechanical Dimensions – 44-Lead PLCC Package Inches Symbol Min. A A1 A2 B B1 D/E D1/E1 D3/E3 e J ND/NE N ccc Max. .165 .180 .090 .120 .020 — .013 .021 .026 .032 .685 .695 .650 .656 .500 BSC .050 BSC .042 .056 11 44 — .004 Millimeters Min. Notes: Notes 1. All dimensions and tolerances conform to ANSI Y14.5M-1982 Max. 4.19 4.57 2.29 3.05 .51 — .33 .53 .66 .81 17.40 17.65 16.51 16.66 12.7 BSC 1.27 BSC 1.07 1.42 11 44 — 0.10 2. Corner and edge chamfer (J) = 45° 3. Dimension D1 and E1 do not include mold protrusion. Allowable protrusion is .101" (.25mm) 3 2 E E1 D J D1 D3/E3 B1 J e A A1 A2 B –C– LEAD COPLANARITY ccc C 10 PRODUCT SPECIFICATION TMC3033 Mechanical Dimensions – 48-Lead LQFP Package Inches Symbol Min. A A1 A2 B D/E D1/E1 e L N ND α ccc Millimeters Max. .055 .063 .001 .005 .053 .057 .006 .010 .346 .362 .268 .284 .019 BSC .017 .029 48 12 0° 7° .004 Min. Notes: Notes 1. All dimensions and tolerances conform to ANSI Y14.5M-1982. Max. 1.40 1.60 .05 .15 1.35 1.45 .17 .27 8.8 9.2 6.8 7.2 .50 BSC .45 .75 48 12 0° 7° 0.08 2. Dimensions "D1" and "E1" do not include mold protrusion. Allowable protrusion is 0.25mm per side. D1 and E1 are maximum plastic body size dimensions including mold mismatch. 3. Pin 1 identifier is optional. 7 8 2 4. Dimension ND: Number of terminals. 5. Dimension ND: Number of terminals per package edge. 6. "L" is the length of terminal for soldering to a substrate. 7. Dimension "B" does not include dambar protrusion. Allowable dambar protrusion shall not cause the lead width to exceed the maximum B dimension by more than 0.08mm. Dambar can not be located on the lower radius or the foot. Minimum space between protrusion and an adjacent lead is 0.07mm for 0.4mm and 0.5mm pitch packages. 6 4 5 8. To be determined at seating place —C— D D1 e PIN 1 IDENTIFIER E E1 C L α 0.063" Ref (1.60mm) See Lead Detail A Base Plane A2 B A1 Seating Plane -CLEAD COPLANARITY ccc C 11 TMC3033 PRODUCT SPECIFICATION Ordering Information Product Number Conversion Rate (Msps) Temperature Range Screening Package Package Marking TMC3033R2C30 30 Msps TA = 0°C to 70°C Commercial 44-Lead PLCC 3033R2C30 TMC3033R2C50 50 Msps TA = 0°C to 70°C Commercial 44-Lead PLCC 3033R2C50 TMC3033R2C80 80 Msps TA = 0°C to 70°C Commercial 44-Lead PLCC 3033R2C80 TMC3033KRC30 30 Msps TA = 0°C to 70°C Commercial 48-Lead LQFP 3033KRC30 TMC3033KRC50 50 Msps TA = 0°C to 70°C Commercial 48-Lead LQFP 3033KRC50 TMC3033KRC80 80 Msps TA = 0°C to 70°C Commercial 48-Lead LQFP 3033KRC80 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 3/3/99 0.0m 001 Stock#DS30003033 1999 Fairchild Semiconductor Corporation