SGM9110 8MHz Rail-to-Rail Composite Video Driver with 6dB Gain FEATURES PRODUCT DESCRIPTION The SGM9110 is single rail-to-rail 3-pole output reconstruction filter with a -3dB bandwidth of 8MHz and a slew rate of 40V/µs. Operating from single supplies ranging from +2.5V to +5.5V and sinking an ultra-low 2.65mA quiescent current, the SGM9110 is ideally suited for low power, battery-operated applications. The output swings within 100mV of GND and 170mV to V+ with a standard back-terminated video load (150Ω). SGM9110 employs an internal level shift circuit that avoids sync-pulse clipping and allows DC-coupled output. If AC-coupling is preferred, the SGM9110 offers a sag-correction feature that significantly reduces the size of the output coupling capacitor. SGM9110 has a power-down disable feature that reduces the supply current to 2µA, dramatically reducing power consumption and prolonging battery life. It is specified over the extended –40°C to +125°C temperature range. BLOCK DIAGRAM • • • • • • • • • • Low Cost Excellent Video Performance 3-Pole Reconstruction Filter Internal Gain: 6dB Rail-to-Rail Output SAG Correction Reduces AC Coupling Capacitor size Input Voltage Range Includes Ground AC-Coupled Input Operates on 2.5 V to 5.5 V Single-Supplies Low Power 2.65 mA Typical Supply Current SGM9110 2µA when Disabled Small Packaging SGM9110 Available in SC70-6 APPLICATIONS Video amplifiers Cable and Satellite set top boxes Communications devices Video on demand Portable and handheld products Personal video recorders DVD players HDTV +VS =2.5V to 5.5V PIN CONFIGURATIONS (Top View) +VS 3-Pole Filter SGM9110 Level Shifter +IN 1 GND 2 SAG 3 OUT 6dB SAG SGM9110 9110 IN DISABLE 6 +VS 5 DISABLE 4 OUT SC70-6 GND Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com REV. A ELECTRICAL CHARACTERISTICS: VS = +3.3V (At RL = 150Ω connected to GND, and CIN = 0.1µF, unless otherwise noted) SGM9110 PARAMETER CONDITION TYP MIN/MAX OVER TEMPERATURE +25℃ +25℃ 0℃ to70℃ -40℃ to 85℃ -40℃ to125℃ UNITS MIN/ MAX 106 130 135 145 175 mV MAX pA TYP MIN INPUT CHARACTERISTICS Output Level Shift Voltage (VOLS) VIN = 0V, no load Input Bias Current (IB) Input Voltage Clamp (VCLAMP) IIN = -1mA -61 -65 -70 -73 -80 mV Clamp Charge Current VIN = VCLAMP -100mV -2.7 -2.8 -2.82 -2.84 -2.86 mA MIN Clamp Discharge Current VIN = 500mV 4 5 6 6.5 7 µA MAX Input Resistance (RIN) 0.5V ＜ VIN ＜ 1.0V MΩ MIN Voltage Gain ( AV) RL = 150Ω 2.0 1.97 1.968 1.966 1.93 V/V MIN 2.03 2.032 2.034 2.07 V/V MAX V/V TYP µV/℃ TYP SAG Correction DC Gain to VOUT( ASAG) SAG open Input Offset Voltage Drift (∆VOS/∆T) OUTPUT CHARACTERISTICS Output Voltage High Swing VIN = 2V, RL = 150Ω to GND 3.13 3.1 3.05 3.03 3.0 V MIN Output Short-Circuit Current (ISC) VIN = 2V, to GND through 10Ω 105 100 100 95 90 mA MIN VIN = 100mV, out short to VDD through 10Ω -120 -110 -108 -107 -105 mA MAX 2.5 2.7 2.7 2.7 V MIN 5.5 5.5 5.5 5.5 V MAX POWER SUPPLY Operating Voltage Range Power Supply Rejection Ratio (PSRR) Vs = +2.7 V to + 5.5 V 70 62 61 60 58 dB MIN Quiescent Current (IQ) VIN = 500mV, Disabled = Vs, no load Disabled = 0V 2.65 2.94 3.03 3.12 3.39 mA MAX 2 4 4.5 5 6 µA MAX ±0.1dB Bandwidth RL = 150Ω, CL = 5pF 4.4 MHz TYP -3dB Bandwidth RL = 150Ω, CL = 5pF 8.0 MHz TYP +0.15 dB TYP -22 dB TYP 40 V/µs TYP Supply Current when Disabled DYNAMIC PERFORMANCE Filter Response Normalized Gain: fIN = 4.5MHz fIN = 27MHz Slew Rate 10% to 90%, VIN = 1V Step, Differential Gain Error (DG) NTSC & PAL DC coupled 0.46 % TYP NTSC & PAL AC coupled 1.2 % TYP NTSC & PAL DC coupled 0.8 ° TYP NTSC & PAL AC coupled 1.0 ° TYP Differential Phase Error (DP) Group Delay Variation (D/DT) f = 100KHz, 5MHz 8 ns TYP Fall Time 2.5VSTEP, 80% to 20% 30 ns TYP Rise Time 2.5VSTEP, 80% to 20% 40 ns TYP MAX POWER-DOWN DISABLE Disabled (logic-LOW Threshold) Vs = +2.7 V to + 3.3 V 0.8 V Disabled (logic-HIGH Threshold) Disable Time Vs = +2.7 V to + 3.3 V 1.6 V MIN VIN = 500mV, VOUT to 1% 360 ns TYP Disable Time Disable Current VIN = 500mV, VOUT to 1% 90 ns TYP Disable pin = 0V 20 nA MAX Specifications subject to change without notice. ２ SGM9110 PACKAGE/ORDERING INFORMATION ORDER NUMBER PACKAGE DESCRIPTION TEMPERATURE RANGE PACKAGE OPTION MARKING INFORMATION SGM9110XC6/TR SC70-6 -40℃ to +125℃ Tape and Reel, 3000 9110 ABSOLUTE MAXIMUM RATINGS CAUTION Supply Voltage, V+ to V- . . . . . . . . . . . . . . . . . . . . . 7.5 V Input Voltage . . . . . . . . . . . . . . . . . . . . GND – 0.3 V to (+VS) +0.3V Storage Temperature Range . . . . . . . . .–65℃ to +150℃ Junction Temperature . . . . . . . . . . . . . . . .. . . . . . . .160℃ Operating Temperature Range . . . . . . –40℃ to +125℃ Power Dissipation, PD @ TA = 25℃ SC70-6 ..........................................................................0.3W Package Thermal Resistance SC70-6, θJA............................................................ 330℃/W Lead Temperature Range (Soldering 10 sec) . . . . . . . . . . .. . . . . . . . . . . . . . . . 260℃ ESD Susceptibility HBM...........................................................................1000V MM...............................................................................400V This integrated circuit can be damaged by ESD. Shengbang Micro-electronics recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. NOTES 1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ３ SGM9110 TYPICAL PERFORMANCE CHARACTERISTICS At VS = +3.3V, TA = +25℃, RL = 150Ω, CL = 5pF unless otherwise noted. 270 0 180 Phase(degree) Normalized Gain(dB) Frequency Response 3 -3 -6 -9 Phase vs. Frequency 90 0 -90 -180 -12 -15 0.01 -270 0.1 1 10 0.1 100 1 PSRR vs. Frequency 45 -50 40 Group Delay (ns) PSRR(dB) -55 -60 -65 -70 -75 -80 35 30 25 20 15 -85 0.1 1 10 10 0.01 100 Frequency(MHz) Gain vs. Frequency -3dB 30 0.1 1 10 Frequency(MHz) Large-Signal Disable/Enable Response 2 SAG Open -3dB BW @ 10.7MHz Enable Signal 1.5 Output Voltage(500mV/div) Output Voltage(500mV/div) 20 10 0 Gain(dB) Group Delay vs. Frequency 50 -45 -90 0.01 100 Frequency(MHz) Frequency(MHz) -40 10 1 0.5 -10 SAG Close -3dB BW @ 8MHz -20 -30 0 Output Signal -0.5 -1 -40 Disable Signal -1.5 -50 -60 -2 0.1 1 10 100 1000 -3 Frequency(MHz) ４ -2 -1 0 1Time(1µs/div) 2 3 4 Time(1µs/div) 5 6 7 SGM9110 TYPICAL PERFORMANCE CHARACTERISTICS At VS = +3.3V, TA = +25℃, RL = 150Ω, CL = 5pF unless otherwise noted. Small Signal Step Response Large Signal Step Response 0.4 1.25 Output Voltage(V/) Output Voltage(V/) 1 0.75 0.5 0.25 0.3 0.2 0.1 0 -0.25 0 0 100 200 300 400 500 600 0 100 200 Time (ns) Quiescent Current vs. Supply Voltage 5 600 0.8 3.5 3 2.5 2 1.5 0.7 0.6 0.5 0.4 0.3 1 0.2 0.5 0.1 0 0 2 2.5 3 3.5 4 4.5 5 -50 5.5 -25 0 Supply Voltage(V) 25 50 75 100 125 Temperature(℃) Quiescent Current vs. Temperature 5 Shutdown Current vs. Temperature 3 Shutdown Current (µA) 4.5 Quiescent Current (mA) 500 0.9 Gain Error(%) Quiescent Current (mA) 4 400 Gain Error vs. Temperature 1 No Load VIN = 500mV 4.5 300 Time (ns) 4 3.5 3 2.5 2 1.5 2.5 2 1.5 1 0.5 0 1 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Temperature(℃) Temperature(℃) ５ SGM9110 TYPICAL PERFORMANCE CHARACTERISTICS At VS = +3.3V, TA = +25℃, RL = 150Ω, CL = 5pF unless otherwise noted. 3.3 3.2 3.1 3 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 Output Voltage Swing to The Negative Rail vs. Output Current 1 0.9 VIN = 0V 0.8 Output Voltage(v) Output Voltage(v) Output Voltage Swing to The Positive Rail vs. Output Current +85℃ +25℃ -40℃ 0.7 0.6 0.5 0.4 -40℃ 0.3 +25℃ 0.2 +85℃ 0.1 0 0 0.02 0.04 0.06 0.08 0.1 0 Output Current(A) 0.02 0.04 0.06 0.08 0.1 Output Current(A) ６ SGM9110 Application Information Internal Sync Clamp The SGM9110 low cost, integrated, 3-pole, video filter is intended to replace passive LC filters and drivers in low voltage portable video applications. The 3-pole filter provides better image quality compared to typical 2-pole solutions. The typical embedded video DAC operates from a ground referenced single supply. This becomes an issue because the lower level of the sync pulse output may be at a 0V reference level to some positive level. The problem is presenting a 0V input to most single supply driven amplifiers will saturate the output stage of the amplifier resulting in a clipped sync tip and degrading the video image. A larger positive reference may offset the input above its positive range. The SGM9110 input must be AC-coupled because the input capacitor stores the clamp voltage. It needs a typical value of 0.1µF for the input clamp to meet the Line Droop specification. The SGM9110 output can drive an AC or DC-coupled doubly terminated coax (150Ω) load（see Figure 1 ）. DC-coupling the output removes the need for an expensive and large output coupling capacitor（see Figure 2）. If an AC-coupled output is needed, the SAG correction circuit can be used to reduce the AC output coupling capacitor value. The SGM9110 features an internal sync clamp and offset function to level shift the entire video signal to the best level before it reaches the input of the amplifier stage. These features are also helpful to avoid saturation of the output stage of the amplifier by setting the signal closer to the best voltage range. Offering SAG correction, fixed gain of 6dB, and a 3-pole low pass filter in a tiny space saving package makes the SGM9110 well suited for space sensitive applications such as digital cameras,cellular phones and other portable devices. The typical Application diagram of the SGM9110 in Figure 1 is divided into four sections. The first, Section A is the Sync Clamp. The AC coupled video sync signal is pulled negative by a current source at the input of the comparator amplifier. When the sync tip goes below the comparator threshold the output comparator is driven negative, The PMOS device turns on clamping sync tip to near ground level. The network triggers on the sync tip of video signal. Enable/Shutdown The SGM9110 has a shutdown feature that disables the output and reduces the quiescent current to 2µA. This feature is particularly useful in portable applications, such as video cameras, hand held gaming devices, cellular phones and requiring video filtering and drive capability. +VS +VS +VS C3 IN VDC 0.1µF IN RIN R1 CIN R2 C1 SYNC CLAMP OUT R3 C4 = 47µF ROUT 75Ω R4 C2 SAG SALLEN KEY LOW PASS FILTER R6 R5 RL 75Ω C5 = 22µF AC COUPLING CAPACITOR DISABLE R7 DISABLE = GND: SHUTDOWN I+ ~ 0 DISABLE = +VS: ACTIVE I+ ~ 2.65mA GND SAG NETWORK Figure 1. Typical Application Diagram ７ SGM9110 +VS +VS +VS C3 IN VDC 0.1µF IN RIN R1 CIN R2 C1 C2 SALLEN KEY LOW PASS FILTER SYNC CLAMP DISABLE OUT R3 DISABLE = GND: SHUTDOWN I+ ~ 0 DISABLE = +VS: ACTIVE I+ ~ 2.65mA 75Ω R4 SAG R6 ROUT RL 75Ω R5 R7 GND SAG NETWORK Figure 2. AC-Coupled Input/DC-Coupled Output SAG Correction Layout and Power-Supply Bypassing The SGM9110 can use the SAG configuration if an AC-coupled output video signal is needed. SAG correction refers to the low-frequency compensation for the high pass filter formed by the 150Ω load and the output capacitor. In video applications, the cutoff frequency must be low enough to pass the vertical sync interval to avoid field tilt. This cutoff frequency should be less than 5Hz, and the coupling capacitor must be very large in normal configuration, typically is 220µF. In SAG configuration, the SGM9110 removes the need for large coupling capacitors, and instead needs one 22µF and one 47uF capacitors (Figure 1) to reach the same performance as the large capacitor. The SGM9110 operates from single 2.5V to 5.5V supply. Bypass the supply with a 0.1µF capacitor as close to the pin as possible. SGMC recommends using microstrip and stripline techniques to obtain full bandwidth. To ensure that the PC board does not degrade the device’s performance, design it for a frequency greater than 1GHz. Pay careful attention to inputs and outputs to avoid large parasitic capacitance. Whether or not you use a constant-impedance board, observe the following design guidelines: • Do not use IC sockets; they increase parasitic capacitance and inductance. • Do not use wire-wrap boards; they are too inductive. The Sallen Key Low Pass Filter • Use surface-mount instead of through-hole components for better, high-frequency performance. • Use a PC board with at least two layers; it should be as free from voids as possible. • Keep signal lines as short and as straight as possible. Do not make 90° turns; round all corners. The Sallen Key in a classic low pass configuration illustrated in Figure 1. The filter provides a very stable low pass function, and in the case of the SGM9110, a 3-pole roll-off at around 8MHz. The 3-pole function is accomplished with an RC low pass network placed in series with and before the Sallen Key. One pole provided by the RC network and poles two and three provided by the Sallen Key for a nice 3-pole roll-off at around 8MHz. ８ SGM9110 PACKAGE OUTLINE DIMENSIONS SC70-6 D Symbol θ e1 L1 E E1 L e A 0.900 1.100 0.035 0.043 0.000 0.100 0.000 0.004 A2 0.900 1.000 0.035 0.039 b 0.150 0.350 0.006 0.014 c 0.080 0.150 0.003 0.006 D 2.000 2.200 0.079 0.087 E 1.150 1.350 0.045 0.053 E1 2.150 2.450 0.085 0.096 e1 L A A2 A1 C 0.20 ９ Dimensions In Inches Min Max A1 e b Dimensions In Millimeters Min Max 0.650TYP 1.200 1.400 0.525REF 0.026TYP 0.047 0.055 0.021REF L1 0.260 0.460 0.010 0.018 θ 0° 8° 0° 8° SGM9110 REVISION HISTORY Location Page 11/06— Data Sheet changed from preliminary to REV. A Changes to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Shengbang Microelectronics Co, Ltd Unit 3, ChuangYe Plaza No.5, TaiHu Northern Street, YingBin Road Centralized Industrial Park Harbin Development Zone Harbin, HeiLongJiang 150078 P.R. China Tel.: 86-451-84348461 Fax: 86-451-84308461 www.sg-micro.com １０ SGM9110