ISL59111 ® Data Sheet August 29, 2006 FN6172.3 8MHz Rail-to-Rail Composite Video Driver Features The ISL59111 is a single rail-to-rail 3-pole output reconstruction filter with a -3dB roll-off frequency of 8MHz and a slew rate of 40V/µs, with input signal DC restoration accomplished with an internal sync tip clamp. Operating from single supplies ranging from +2.5V to +3.6V and sinking an ultra-low 2mA quiescent current, the ISL59111 is ideally suited for low power, battery-operated applications. It also features inputs capable of reaching down to 0.15V below the negative rail. Additionally, an enable high pin shuts the part down in under 14ns. • 3rd order 8MHz reconstruction filter The ISL59111 is designed to meet the needs for very low power and bandwidth required in battery-operated communication, instrumentation, and modern industrial applications such as video on demand, cable set-top boxes, DVD players, and HDTV. The ISL59111 is offered in a space-saving CSP package guaranteed to a 0.7mm maximum height constraint and specified for operation from -40°C to +85°C temperature range. • Low supply current = 2mA • Power-down current less than 3µA • Supplies from 2.5V to 3.6V • Rail-to-rail output • Input to 0.15V below VS• Input sync tip clamp • SAG correction reduces AC coupling capacitor size • Pb-free plus anneal available (RoHS compliant) Applications • Video amplifiers • Portable and handheld products • Communications devices Ordering Information PART NUMBER (See Note) • 40V/µs slew rate • Video on demand PART MARKING TAPE & REEL PACKAGE (Pb-Free) PKG. DWG. # • Cable set-top boxes • Satellite set-top boxes ISL59111IZ-T7 111Z 7” (3k pcs) 6 Ld CSP (2x3) MDP0054 • DVD players NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. • HDTV • Personal video recorders Pinout ISL59111 (6 LD CSP)* TOP VIEW A B 1 OUT VDD 2 GND EN 3 SAG IN *0.7mm MAXIMUM HEIGHT GUARANTEED 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2005, 2006. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ISL59111 Absolute Maximum Ratings (TA = +25°C) Supply Voltage from VS+ to GND . . . . . . . . . . . . . . . . . . . . . . . 3.6V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . VS+ +0.3V to GND -0.3V Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +125°C Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +125°C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA Electrical Specifications DESCRIPTION VS+ = 3.3V, TA = +25°C, RL = 150Ω to GND, CL = 0.1µF, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNIT 3.6 V 2.75 mA 3 µA INPUT CHARACTERISTICS VCC Supply Voltage Range 2.5 IDD-ON Quiescent Supply Current VIN = 500mV, EN = VDD, no load IDD-OFF Shutdown Supply Current EN = 0V VOLS Output Level Shift Voltage VIN = 0V, no load 60 130 200 mV VCLAMP Input Voltage Clamp IIN = -1mA -40 -15 +10 mV ICLAMP_CHG Clamp Charge Current VIN = VCLAMP - 100mV -6 -3 mA ICLAMP_DCHG Clamp Discharge Current VIN = 500mV 2.5 5 7.5 µA RIN Input Resistance 0.5V < VIN < 1.0V 0.5 3 AV Voltage Gain RL = 150Ω 1.95 2.0 ASAG SAG Correction DC Gain to VOUT SAG open PSRR DC Power Supply Rejection VDD = 2.7V to 3.3V VOH Output Voltage High Swing VIN = 2V, RL = 150Ω to GND ISC Output Short-Circuit Current VIN = 2V, to GND through 10Ω 2 MΩ 2.04 V/V 2.25 V/V 43 63 dB 2.85 3.2 V -94 VIN = 100mV, out short to VDD through 10Ω 65 115 -3 0 IENABLE Enable Current ±3.3V, enable pin = 0V VIL Disable Threshold VDD = 2.7V to 3.3V VIH Enable Threshold VDD = 2.7V to 3.3V 1.6 ROUT Shutdown Output Impedance EN = 0V DC 3.6 -65 mA mA +3 µA 0.8 V V 4.5 5.9 kΩ EN = 0V, f = 4.5MHz 3.4 kΩ AC PERFORMANCE BW ±0.1dB Bandwidth RL = 150Ω, CL = 5pF 4 MHz BW -3dB Bandwidth RL = 150Ω, CL = 5pF 8 MHz Normalized Stopband Gain f = 27MHz -24.2 dB Differential Gain NTSC and PAL DC coupled 0.10 % NTSC and PAL AC coupled 0.84 % NTSC and PAL DC coupled 0.05 ° NTSC and PAL AC coupled 0.62 ° dG dP Differential Phase D/DT Group Delay Variation f = 100kHz, 5MHz 5.4 ns SNR Signal To Noise Ratio 100% white signal 65 dB TON Enable Time VIN = 500mV, VOUT to 1% 200 ns 2 FN6172.3 August 29, 2006 ISL59111 Electrical Specifications DESCRIPTION VS+ = 3.3V, TA = +25°C, RL = 150Ω to GND, CL = 0.1µF, unless otherwise specified. (Continued) PARAMETER CONDITIONS MIN TYP MAX 14 UNIT TOFF Disable Time VIN = 500mV, VOUT to 1% ns +SR Positive Slew Rate 10% to 90%, VIN = 1V step 20 41 70 V/µs -SR Negative Slew Rate 90% to 10%, VIN = 1V step -15 -30 -70 V/µs tF Fall Time 2.5VSTEP, 80% - 20% 25 ns tR Rise Time 2.5VSTEP, 20% - 80% 22 ns Typical Performance Curves NORMALIZED GAIN (dB) 0.5 VDD=+3.3V RL=150Ω 0.3 CL=5pF -0.1dB BW @ 4MHz 0.1 -0.1 -0.3 -0.5 100K 1M 10M FREQUENCY (Hz) FIGURE 1. GAIN vs FREQUENCY -0.1dB FIGURE 2. GAIN vs FREQUENCY -3dB POINT FIGURE 3. GAIN vs FREQUENCY -3dB FIGURE 4. GAIN vs FREQUENCY FOR VARIOUS RLOAD 3 FN6172.3 August 29, 2006 ISL59111 Typical Performance Curves FIGURE 5. GAIN vs FREQUENCY FOR VARIOUS CLOAD FIGURE 6. MAXIMUM OUTPUT MAGNITUDE vs INPUT MAGNITUDE FIGURE 8. PSRR vs FREQUENCY FIGURE 7. PHASE vs FREQUENCY 100 OUTPUT IMPEDANCE (Ω) VDD=+3.3V 10 1 0.1 0.01 10K 100K 1M 10M 100M FREQUENCY (Hz) FIGURE 9. OUTPUT IMPEDANCE vs FREQUENCY 4 FIGURE 10. ISOLATION vs FREQUENCY FN6172.3 August 29, 2006 ISL59111 Typical Performance Curves FIGURE 11. MAXIMUM OUTPUT vs LOAD RESISTANCE FIGURE 12. SUPPLY CURRENT vs SUPPLY VOLTAGE FIGURE 13. LARGE SIGNAL STEP RESPONSE FIGURE 14. SMALL SIGNAL STEP RESPONSE FIGURE 15. ENABLE TIME FIGURE 16. DISABLE TIME 5 FN6172.3 August 29, 2006 ISL59111 Typical Performance Curves FIGURE 17. HARMONIC DISTORTION vs FREQUENCY FIGURE 18. HARMONIC DISTORTION vs OUTPUT VOLTAGE FIGURE 19. GROUP DELAY vs FREQUENCY FIGURE 20. -3dB BANDWIDTH vs INPUT RESISTANCE FIGURE 21. SLEW RATE vs SUPPLY VOLTAGE 6 FN6172.3 August 29, 2006 ISL59111 SYNC CLAMP VDD VDD VDD SALLEN KEY LOW PASS FILTER C2 + CIN SAG NETWORK R1 IN R2 R3 + – IN RIN 100nF C1 AC COUPLING CAPACITOR VDC OUT + - C3 C5 47µF R6 R7 SAG ROUT 75Ω C4 RL 75Ω 22µF R5 EN EN=GND: SHUTDOWN IDD~0 EN=VDD: ACTIVE IDD~1.5mA GND R4 FIGURE 22. BLOCK DIAGRAM Application Information The ISL59111 is a single supply rail-to-rail output amplifier achieving a -3dB bandwidth of around 8MHz and slew rate of about 40V/µs while demanding only 2mA of supply current. This part is ideally suited for applications with specific micropower consumption and high bandwidth demands. As the performance characteristics above and the features described below, the ISL59111 is designed to be very attractive for portable composite video applications. The ISL59111 features a sync clamp, low pass function, and SAG network at the output facilitating reduction of typically large AC coupling capacitors. See Figure 22. Internal Sync Clamp 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 ISL59111 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 7 stage of the amplifier by setting the signal closer to the best voltage range. The simplified block diagram of the ISL59111 in Figure 22 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. The Sallen Key Low Pass Filter The Sallen Key is a classic low pass configuration illustrated in Figure 22. This provides a very stable low pass function, and in the case of the ISL59111, a three-pole roll-off at around 8MHz. The three-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 threepole roll-off at around 8MHz. If more aggressive, multiplepole roll-offs are needed, multiple ISL59111 can be placed in series. There will, of course, be a loss of bandwidth as additional devices are added. AC Output Coupling and the SAG Network Composite video signals carry viable information at frequencies as low as 30Hz up to 5MHz. When a video system output is AC coupled it is critical that the filter represented by the output coupling capacitor and the FN6172.3 August 29, 2006 ISL59111 surrounding resistance network provide a band pass function with a low pass band low enough to exclude very low frequencies down to DC, and with a high pass band pass sufficiently high to include frequencies at the higher end of the video spectrum. SAG NETWORK AC COUPLING CAPACITOR C5 R6 R7 ROUT RL C4 R5 R4 Output Drive Capability The ISL59111 does not have internal short circuit protection circuitry. If the output is shorted indefinitely, the power dissipation could easily overheat the die or the current could eventually compromise metal integrity. Maximum reliability is maintained if the output current never exceeds ±40mA. This limit is set by the design of the internal metal interconnect. Note that in transient applications, the part is robust. Short circuit protection can be provided externally with a back match resistor in series with the output placed close as possible to the output pin. In video applications this would be a 75Ω resistor and will provide adequate short circuit protection to the device. Care should still be taken not to stress the device with a short at the output. Power Dissipation FIGURE 23. SAG NETWORK AND AC COUPLING CAPACITORS Typically this is accomplished with 220µF coupling capacitor, a large and somewhat costly solution providing a low frequency pole around 5Hz. If the size of this capacitor is even slightly reduced we have found that the accompanying phase shift in the 50Hz to 100Hz frequency range results in field tilt resulting in a degraded video image. The internal SAG network of the ISL59111 replaces the 220µF AC coupling capacitor with a network of two smaller capacitors as shown in Figure 23. Additionally, the network is designed to place a zero in the ~30Hz range, providing a small amount of peaking to compensate the phase response associated with field tilt. With the high output drive capability of the ISL59111, it is possible to exceed the +125°C absolute maximum junction temperature under certain load current conditions. Therefore, it is important to calculate the maximum junction temperature for an application to determine if load conditions or package types need to be modified to assure operation of the amplifier in a safe operating area. The maximum power dissipation allowed in a package is determined according to: T JMAX – T AMAX PD MAX = -------------------------------------------Θ JA Where: TJMAX = Maximum junction temperature DC Output Coupling TAMAX = Maximum ambient temperature The ISL59111 internal sync clamp makes it possible to DC couple the output to a video load, eliminating the need for any AC coupling capacitors, saving board space and additional expense for capacitors making the ISL59111 is designed to be extremely attractive for portable video applications Additionally, this solution completely eliminates the issue of field tilt in the lower frequency. The trade off is greater demand of supply current. Typical load current for AC coupled is around 3mA compared to typical 6mA used when DC coupling. ΘJA = Thermal resistance of the package The maximum power dissipation actually produced by an IC is the total quiescent supply current times the total power supply voltage, plus the power in the IC due to the load, or: for sourcing: V OUT PD MAX = V S × I SMAX + ( V S – V OUT ) × ---------------R L for sinking: ENABLE + - ROUT PD MAX = V S × I SMAX + ( V OUT – V S ) × I LOAD TELEVISION OR VCR FIGURE 24. DC COUPLE 8 FN6172.3 August 29, 2006 ISL59111 Where: VS = Supply voltage ISMAX = Maximum quiescent supply current VOUT = Maximum output voltage of the application RLOAD = Load resistance tied to ground ILOAD = Load current By setting the two PDMAX equations equal to each other, we can solve the output current and RLOAD to avoid the device overheat. Power Supply Bypassing Printed Circuit Board Layout As with any modern operational amplifier, a good printed circuit board layout is necessary for optimum performance. Lead lengths should be as short as possible. The power supply pin must be well bypassed to reduce the risk of oscillation. For normal single supply operation, a single 4.7µF tantalum capacitor in parallel with a 0.1µF ceramic capacitor from VS+ to GND will suffice. Printed Circuit Board Layout For good AC performance, parasitic capacitance should be kept to minimum. Use of wire wound resistors should be avoided because of their additional series inductance. Use of sockets should also be avoided if possible. Sockets add parasitic inductance and capacitance that can result in compromised performance. 9 FN6172.3 August 29, 2006 ISL59111 3x2 Chip Scale Package (CSP) MDP0054 3x2 CHIP SCALE PACKAGE E SYMBOL MIN NOMINAL MAX A 0.54 0.65 0.70 A1 0.27 0.29 0.31 D PIN 1 ID 0.36 REF A2 TOP VIEW b θ 0.34 D 0.94 A2 0.99 1.04 1.44 E1 A θ 0.40 0.50 BASIC D1 E θ 0.37 1.49 e 0.50 BASIC SD 0.25 BASIC SE 0.00 BASIC A1 NOTE: SIDE VIEW 1.54 1.00 BASIC Rev. 0 6/05 1. All dimensions are in millimeters. E1 e SE B SD D1 A PIN A1 INDICATOR 1 2 3 b BOTTOM VIEW All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 10 FN6172.3 August 29, 2006