High Slew Rate Rail-to-Rail Quad Operational Amplifiers FEATURES • Wide supply voltage range 4.5V ~ 16V • Input range 500mV beyond the rails • Unity-gain stable • Rail-to-rail output swing • High slew rate 20V/μs • GBWP 8 MHz • 12 MHz -3dB Bandwidth • Ultra-small Package TSSOP-14 APPLICATIONS • TFT-LCD Reference Driver • Touch-Screen Display • Wireless LANs • Personal Communication Devices • Direct Access Arrangement • Personal Digital Assistant (PDA) • Active Filter • Sampling ADC Amplifier • ADC/DAC Buffer • Electronic Notebook • Office Automation EC5420 With features of 20V/μs high slew rate and 200ns of fast settling time, as well as 30mA (sink and source) of high output driving capability, the EC5420 is ideal for the requirements of flat panel Thin Film Transistor Liquid Crystal Displays (TFT-LCD) panel reference buffers application. Due to insensitive to power supply variation, EC5420 offers flexibility of use in multitude of applications such as battery power, portable devices and anywhere low power consumption is concerned. With standard operational amplifier pin assignment, the EC5420 is offered in space saving 14-Pin TSSOP package and specified over the -40°C to +85°C temperature range. PIN ASSIGNMENT V IN A - 2 V IN A+ 3 V s+ 4 V IN B + 5 V IN B- 6 V OUTB 7 - + + + + The EC5420 is a 30mA output current rail-to-rail quad channels operational amplifier with wide supply range from 4.5V to 18V while consumes only 750uA per channel. It provides 0.5V beyond the supply rails of common mode input range and capability of rail-to-rail output swing as well. This enables the amplifier to offer maximum dynamic range at any supply voltage among many applications. A 8MHz gain bandwidth product allows EC5420 to perform more stable than other devices in Internet applications. P 1 / 9 V OUTD 13 V IN D - 12 V IN D + 11 V S- 10 V IN C + 9 V IN C - 8 V OUTC C B GENERAL DESCRIPTION 14 D 1 A V OUTA - - TSSOP-14 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 ABSOLUTE MAXIMUM RATINGS (TA = 25 °C) Values beyond absolute maximum ratings may cause permanent damage to the device. These are stress ratings only; functional device operation is not implied. Exposure to AMR conditions for extended periods may affect device reliability. Supply Voltage between VS+ and VS+16V Storage Temperature -65°C to +150°C Operating Temperature -40°C to +85°C Input Voltage VS-－0.5V, VS +＋0.5V Lead Temperature 260°C Maximum Continuous Output Current 30mA ESD Voltage 2kV Maximum Die Temperature +125°C Important Note: All parameters having Min/Max specifications are guaranteed. Typical 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 CHARACTERISTICS VS+= +5V, VS - = -5V, RL = 10kΩ and CL = 10pF to 0V, TA = 25°C unless otherwise specified. Parameter Description Input Characteristics VOS Input Offset Voltage TCVOS Average Offset Voltage Drift IB Input Bias Current RIN Input Impedance CIN Input Capacitance CMIR Common-Mode Input Range CMRR Common-Mode Rejection Ratio B AVOL Open-Loop Gain Output Characteristics VOL Output Swing Low VOH Output Swing High ISC Short Circuit Current IOUT Output Current Power Supply Performance PSRR Power Supply Rejection Ratio IS Supply Current (Per Amplifier) Dynamic Performance SR Slew Rate [2] tS Settling to +0.1% (AV = +1) BW -3dB Bandwidth GBWP Gain-Bandwidth Product PM Phase Margin CS Channel Separation 1. Measured over operating temperature range 2. Slew rate is measured on rising and falling edges Condition Min Typ VCM= 0V [1] VCM= 0V for VIN from -0.5V to 5.5V 0.5V ≤ VOUT ≤ 4.5V IL=-5mA IL=5mA 2 5 2 1 1.35 Units -0.5 50 70 mV µV/°C nA GΩ pF V dB 75 90 dB 4.85 VS is moved from ±2.25V to ±7.75V No Load 60 -4.0V ≤ VOUT ≤ 4.0V, 20% to 80% (AV = +1), VO=2V Step RL = 10kΩ, CL=10pF RL = 10kΩ, CL=10pF RL = 10kΩ, CL = 10 pF f = 5 MHz 13 P 2 / 9 Max 12 50 +5.5 -4.92 4.92 ±150 ±30 -4.85 80 750 mV V mA mA dB 1000 uA 20 V/µs 200 12 8 50 75 ns MHz MHz Degrees dB Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 TYPICAL PERFORMANCE CURVES Quantity(Amplifiers) 1750 1500 1250 1000 750 500 250 0 -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 7 9 11 13 15 Input Offset(mV) Figure (a) Input Offset Voltage Distribution Figure (b) Rail to Rail Capability Figure (c) Input Beyond the Rails Signal Figure (d) Large Signal Transient Response Figure (e) Large Signal Transient Response P 3 / 9 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 TYPICAL PERFORMANCE CURVES RL=10KΩ Av = 1 Vs = ±5V Figure (f) Open Loop Gain & Phase vs. Frequency Figure (g) Frequency Response for Various CL CL=10 pF Av = 1 Vs = ±5V Figure (h) Frequency Response for Various RL P 4 / 9 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 APPLICATIONS INFORMATION Product Description The EC5420 rail-to-rail quad channels amplifier is built on an advanced high voltage CMOS process. It’s beyond rails input capability and full swing of output range made itself an ideal amplifier for use in a wide range of general-purpose applications. The features of 20V/µS high slew rate, fast settling time, 8MHz of GBWP as well as high output driving capability have proven the EC5420 a good voltage reference buffer for TFT-LCD for applications. High phase margin make the EC5420 ideal for Connected in voltage follower mode for high drive applications Supply Voltage, Input Range and Output Swing The EC5420 can be operated with a single nominal wide supply voltage ranging from 4.5V to 16V with stable performance over operating temperatures of -40 °C to +85 °C. With 500mV greater than rail-to-rail input common mode voltage range and 80dB of Common Mode Rejection Ratio, the EC5420 allows a wide range sensing among many applications without having any concerns over exceeding the range and no compromise in accuracy. The output swings of the EC5420 typically extend to within 80mV of positive and negative supply rails with load currents of 5mA. The output voltage swing can be even closer to the supply rails by merely decreasing the load current. Figure 1 shows the input and output waveforms for the device in the unity-gain configuration. The amplifier is operated under ±5V supply with a 10kΩ load connected to GND. The input is a 10Vp-p sinusoid. An approximately 9.985 Vp-p of output voltage swing can be easily achieved. continuous current from exceeding +/-30 mA such that the maximum reliability can be well maintained. Output Phase Reversal The EC5420 is designed to prevent its output from being phase reversal as long as the input voltage is limited from VS-－0.5V to VS+ ＋0.5V. Figure 2 shows a photo of the device output with its input voltage driven beyond the supply rails. Although the phase of the device's output will not be reversed, the input's over-voltage should be avoided. An improper input voltage exceeds supply range by more than 0.6V may result in an over stress damage. Figure 2. Operation with Beyond-the Rails Input Power Dissipation The EC5420 is designed for maximum output current capability. Even though momentary output shorted to ground causes little damage to the device. For the high drive amplifier EC5420, it is possible to exceed the 'absolute-maximum junction temperature' under certain load current conditions. Therefore, it is important to calculate the maximum junction temperature for the application to determine if load conditions need to be modified for the amplifier to remain in the safe operating area. The maximum power dissipation allowed in a package is determined according to: PDmax = TJmax - TAmax ΘJA Where: Figure 1. Operation with Rail-to-Rail Input and Output Output Short Circuit Current Limit A +/-150mA short circuit current will be limited by the EC5420 if the output is directly shorted to the positive or the negative supply. For an indefinitely output short circuit, the power dissipation could easily increase such that the device may be damaged. The internal metal interconnections are well designed to prevent the output TJmax = Maximum Junction Temperature TAmax= Maximum Ambient Temperature ΘJA = Thermal Resistance of the Package PDmax = Maximum Power Dissipation in 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 P 5 / 9 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 loads, or: PDmax =∑i[VS * ISmax + (VS+ – VO) * IL] When sourcing, and PDmax = ∑i[VS * ISmax + (VO – VS-) * IL] When sinking. Where: i = 1 to 4 VS = Total Supply Voltage SEMI G42-88 Single Layer Test Board ISmax = Maximum Supply Current Per Amplifier Figure 4. Package Power Dissipation vs. Ambient Temperature VO = Maximum Output Voltage of the Application IL= Load current RL= Load Resistance = (VS+ – VO)/IL = (VO – VS-)/ IL A calculation for RL to prevent device from overheat can be easily solved by setting the two PDmax equations equal to each other. Figure 3 and Figure 4 show the relationship between package power dissipation and ambient temperature under the JEDEC JESD 51-7 high effective thermal conductivity test board and SEMI G42-88 single layer test board respectively. From these charts, conditions of the device overheat then can be easily found. The maximum safe power dissipation can be found graphically, based on the package type and the ambient temperature. By using the previous equation, it is a simple matter to see if PDMAX exceeds the device's power de-rating curves. To ensure proper operation, it is important to observe the recommended de-rating curves shown in Figure 3 and Figure 4. JEDEC JESD 51-7 High Effective Thermal Conductivity Test Board 1V Figure 3. Package Power Dissipation vs. Ambient Temperature Driving Capacitive Loads The EC5420 is designed to drive a wide range of capacitive loads. In addition, the output current handling capability of the device allows for good slewing characteristics even with large capacitive loads. The combination of these features make the EC5420 ideally for applications such as TFT LCD panel buffers, ADC input amplifiers, etc. As load capacitance increases, however, the -3dB bandwidth of the device will decrease and the peaking increase. The amplifiers drive 10pF loads in parallel with 10 kΩ with just 1.5dB of peaking, and 100pF with 6.4dB of peaking. If less peaking is desired in these applications, a small series resistor (usually between 5 Ω and 50 Ω) can be placed in series with the output. However, this will obviously reduce the gain slightly. Another method of reducing peaking is to add a "snubber" circuit at the output. A snubber is a shunt load consisting of a resistor in series with a capacitor. Values of 150Ω and 10nF are typical. The advantage of a snubber is that it improves the settling and overshooting performance while does not draw any DC load current or reduce the gain. Power Supply Bypassing and Printed Circuit Board Layout With high phase margin, the EC5420 performs stable gain at high frequency. Like any high-frequency device, good layout of the printed circuit board usually comes with optimum performance. Ground plane construction is highly recommended, lead lengths should be as short as possible and the power supply pins must be well bypassed to reduce the risk of oscillation. For normal single supply operation, where the VS- pin is connected to ground, a 0.1 µF ceramic capacitor should be placed from VS+ pin to VS- pin as a bypassing capacitor. A 4.7µF tantalum capacitor should then be connected in parallel, placed in the region of the amplifier. One 4.7µF capacitor may be used for multiple devices. This same capacitor combination should be placed at each supply pin to ground if split supplies are to be used. P 6 / 9 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 OUTLINE DIMENSIONS (Dimensions shown in millimeters) TSSOP (Thin-Shrink Small Outline Package) 5.0 ± 0.10 0.09 - 0. 20 4.4 ± 0.10 6.4 ± 0.10 0.65 Typ 0.9 Typ 0° - 8° 0.6 ± 0.10 0.10 ± 0.05 0.19 -0.30 Typ P 7 / 9 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 PACKAGE MARKING INDICATION TSSOP 14 EC5420-F Date code Lot No. ORDERING INFORMATION PART NUMBER EC5420I-F EC5420I-G TOP MARK EC5420-F EC5420-G P 8 / 9 PACKAGE Lead free 14-pin TSSOP Green mode TSSOP-14 Rev 0.1 15/5/2006 High Slew Rate Rail-to-Rail Quad Operational Amplifiers EC5420 General Disclaimer: 1. Product information and specifications furnished by E-CMOS in this data sheets are in effect as of the publication date shown and are believed to be accurate and reliable. However, no responsibility is assumed by E-CMOS for the use of any information shown herein, nor for any patent or other rights infringement. 2. No license is granted by implication or otherwise under any patent or industrial properties owned by E-CMOS or any third party through this document. 3. The information herein is subject to change at any time without notice. 4. Neither reproduction nor duplication of this document, in any form, the whole or part is allowed without the prior written approval from E-CMOS. 5. Products of E-CMOS Corp., unless otherwise specified, are not authorized for use as critical components of any device or equipment in applications that demand extremely high reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aircraft, vehicles, nuclear power, radiation resistant system, transportation, disaster prevention equipment, gas related equipment, physical exercise equipment, safety equipment and medical equipment for life support, etc. 6. Although E-CMOS makes every attempt to ensure that its products are of high quality and reliability, thorough consideration of safety design and operating within the ranges guaranteed are strongly recommended to prevent any accident and damage that may ensue. E-CMOS bares no responsibility for failure or damage when abused or used beyond the guaranteed ranges. 7. Products applied to life support devices and systems are strongly requested to contact E-CMOS Corporation headquarter for the written approval to establish suitable terms & conditions. E-CMOS’ warranty is limited to replacement of defective components. Any personal injury or death or any other consequential damages of property are not covered. Copyright © 2002 by E-CMOS Corporation. E-CMOS CORPORATION IC DATASHEET ADDRESS: NO.1, CREATION RD. 2ND, SCIENCE-BASED INDUSTRIAL PARK, HSIN-CHU 300, TAIWAN, R.O.C. WEBSITE: http://www.ecmos.com.tw E-MAIL: mailto:[email protected] TEL: 886-3-5785888 FAX: 886-3-5783630 P 9 / 9 Rev 0.1 15/5/2006