SL8052A

SL8052A „ GENERAL DESCRIPTION „ FEATURES The SL8052A is a rail-to- rail dual channels operational amplifier with wide supply range from 4.5V to 16V. 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 SL8052Ato perform more stable than other devices in Internet applications. • 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 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 SL8052A is ideal for the requirements of flat panel Thin Film Transistor Liquid Crystal Displays (TFT-LCD) panel grayscale reference buffers application. Due to insensitive to power supply variation, SL8052A 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 SL8052A is offered in a space saving 8-Pin MSOP package and specified over the -40°C to +85°C temperature range. • GBWP 8MHz • 12 MHz -3dB Bandwidth • Ultra-small Package MSOP-8 „ APPLICATIONS • TFT-LCD Reference Driver • Touch-Screen Display • Wireless LANs • Personal Communication Devices „ PIN ASSIGNMENT • Direct Access Arrangement • Personal Digital Assistant (PDA) • Active Filter • Sampling ADC Amplifier • ADC/DAC Buffer • Electronic Notebook VOUTA 1 VINA- 2 VINA+ 3 Vs- 4 + 8 Vs+ 7 VOUTB 6 VINB- 5 VINB+ + • Office Automation Package Type : MSOP-8 • Portable Electronics www.slkormicro.com 1 SL8052A „ 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. Storage Temperature Operating Temperature Lead Temperature Supply Voltage between VS+ and VS+16V Input Voltage VS- - 0.5V, VS +0.5V Maximum Continuous Output Current 30mA Maximum Die Temperature +125°C -65°C to +150°C -40°C to +85°C 260°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 Condition Typ VCM= 0V [1] VCM= 0V B for VIN from -5.5V to 5.5V -4.5V ≤ VOUT ≤ 4.5V AVOL Open-Loop Gain Output Characteristics VOL Output Swing LowVOH Output Swing High ISC Short Circuit Current IOUT Output Current Power Supply Performance PSRR Power Supply Rejection Ratio IL=-5mA IL=5mA 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 „ Min Max 2 5 2 1 1.35 -5.5 50 70 mV µV/°C nA GΩ pF V dB 75 95 dB 4.85 VS is moved from ±3.75V 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 = 1 MHz 13 12 Units 50 +5.5 -4.92 4.92 ±120 ±30 -4.85 80 1.2 V V mA mA dB 1.5 mA 20 V/µs 200 12 8 60 75 ns MHz MHz Degrees dB ORDERING INFORMATION PART NO TOP MARK SL8052A SL8052A www.slkormicro.com 2 PACKAGE TYPE MSOP8 GREEN PACKAGE SL8052A „ 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 www.slkormicro.com Figure (e) Large Signal Transient Response 3 SL8052A „ TYPICAL PERFORMANCE CURVES RL=10KΩ Av = 1 Vs = ±5V Figure (g) Open Loop Gain & Phase vs. Frequency Figure (h) Frequency Response for Various CL CL=10 pF Av = 1 Vs = ±5V Figure (h) Frequency Response for Various RL www.slkormicro.com 4 SL8052A „ APPLICATIONS INFORMATION 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 continuous current from exceeding +/-30 mA such that the maximum reliability can be well maintained. Product Description The SL8052A rail-to-rail dual channels amplifier is built on an advanced high voltage CMOS process. It’s beyond rails input capability and full swing of output range makes itself an ideal amplifier for use in a wide range of general-purpose applications. The features of 3.2V/µS high slew rate, fast settling time, 3.5MHz of GBWP as well as high output driving capability have proven the SL8052A a good voltage reference buffer in TFT-LCD for grayscale reference applications. High phase margin and extremely low power consumption (500µA per amplifier) make the SL8052A ideal for Connected in voltage follower mode for low power high drive applications Output Phase Reversal The SL8052A 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. Supply Voltage, Input Range and Output Swing The SL8052A can be operated with a single nominal wide supply voltage ranging from 4.5V to 18V 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 70dB of Common Mode Rejection Ratio, the SL8052A 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 SL8052A 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. Figure 2. Operation with Beyond-the Rails Input Power Dissipation The SL8052A is designed for maximum output current capability. Even though momentary output shorted to ground causes little damage to device. For the high drive amplifier SL8052A, 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 = Where: TJmax = Maximum Junction Temperature TAmax= Maximum Ambient Temperature ΘJA = Thermal Resistance of the Package PDmax = Maximum Power Dissipation in the Package. Figure 1. Operation with Rail-to-Rail Input and Output Output Short Circuit Current Limit A +/-120mA short circuit current will be limited by the SL8052A if the output is directly shorted to the positive or the negative supply. For an indefinitely output short www.slkormicro.com TJmax - TAmax Θ JA The maximum power dissipation actually produced by an IC is the total quiescent supply current times the total 5 SL8052A power supply voltage, plus the power in the IC due to the 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 2 SEMI G42-88 Single Layer Test Board VS = Total Supply Voltage Figure 4. Package Power Dissipation vs. Ambient Temperature ISmax = Maximum Supply Current Per Amplifier VO = Maximum Output Voltage of the Application Driving Capacitive Loads The SL8052A 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 SL8052A ideally for applications such as TFT LCD panel grayscale reference voltage buffers, ADC input amplifiers, etc. 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. 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 SL8052A 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. JEDEC JESD 51-7 High Effective Thermal Conductivity Test Board 1V Figure 3. Package Power Dissipation vs. Ambient Temperature www.slkormicro.com 6 SL8052A „ OUTLINE DIMENSIONS (Dimensions shown in millimeters) MSOP-8 0.18 ± 0.05 3.0 ± 0.10 3.0 ± 0.10 4.90 ± 0.15 0.65 typ 0.86 ± 0.05 3° ± 3° 0.10 ± 0.05 0.33 typ 0.55 ± 0.15 „ PACKAGE MARKING INDICATION www.slkormicro.com 7