SGM8541 SGM8542 SGM8544 1.1MHz, 42µA, Rail-to-Rail I/O CMOS Operational Amplifier FEATURES PRODUCT DESCRIPTION • Low Cost • Rail-to-Rail Input and Output 0.8mV Typical VOS • Unity Gain Stable • Gain Bandwidth Product: : 1.1MHz • Very low input bias currents : 0.5pA • Operates on 2.1 V to 5.5 V Supplies • Input Voltage Range = - 0.1 V to +5.6 V with VS = 5.5 V • Low Supply Current: 42µA/Amplifier • Small Packaging SGM8541 Available in SO-8 and SOT23-5 SGM8542 Available in SO-8 and MSOP-8 SGM8544 Available in SO-16 and TSSOP-16 The SGM8541 (single) ，SGM8542 (dual) and SGM8544 (quad) are rail-to-rail input and output voltage feedback amplifiers offering low cost. They have a wide input common-mode voltage range and output voltage swing, and take the minimum operating supply voltage down to 2.1V and the maximum recommended supply voltage is 5.5 V. All are specified over the extended –40°C to +125°C temperature range. The SGM8541/8542/8544 provide 1.1MHz bandwidth at a low current consumption of 42µA per amplifier. Very low input bias currents of 0.5pA, enable SGM8541/8542 /8544 to be used for integrators, photodiode amplifiers, and piezoelectric sensors. Rail-to-rail inputs and outputs are useful to designers buffering ASIC in single-supply systems. Applications for this amplifiers include safety monitoring, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems. The SGM8541 is available in the tiny SOT23-5 and SO-8 packages. The SGM8542 comes in the miniature SO-8 and MSOP-8 packages. The SGM8544 is offered in TSSOP-16 and SO-16 packages. APPLICATIONS ASIC Input or Output Amplifier Sensor Interface Piezo Electric Transducer Amplifier Medical Instrumentation Mobile Communication Audio Output Portable Systems Smoke Detectors Mobile Telephone Notebook PC PCMCIA cards Battery –Powered equipment Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com PIN CONFIGURATIONS (Top View) SGM8541 SGM8541 NC 1 8 NC -IN 2 7 +VS +IN 3 6 OUT -VS 4 5 NC OUT 1 -VS 2 +IN 3 5 +VS 4 -IN SOT23-5 SO-8 SGM8544 NC = NO CONNECT SGM8542 OUT A 1 16 OUT D -IN A 2 15 -IND +IN A 3 14 +IND +VS 4 13 -VS OUTA 1 8 +VS -INA 2 7 OUT B 3 6 -INB +INB 5 12 +INC 5 +INB -INB 6 11 +INA -VS 4 SO-8 / MSOP-8 OUT B 7 NC 8 10 NC = NO CONNECT 9 -INC OUT C NC SO-16/TSSOP-16 REV. B ELECTRICAL CHARACTERISTICS : VS = +5V (At RL = 100kΩ connected to Vs/2,and VOUT = Vs/2, unless otherwise noted) SGM8541/8542/8544 PARAMETER CONDITION TYP MIN/MAX OVER TEMPERATURE +25℃ +25℃ 0℃ to70℃ -40℃ to 85℃ -40℃ to125℃ UNITS MIN/ MAX Input Offset Voltage (VOS) ±0.8 ±3.5 ±3.7 ±4.1 ±5.4 mV MAX Input Bias Current (IB) 0.5 pA TYP 0.5 pA TYP - 0.1 to + 5.6 V TYP INPUT CHARACTERISTICS Input Offset Current (IOS) Common-Mode Voltage Range (VCM) VS = 5.5V Common-Mode Rejection Ratio(CMRR) VS = 5.5V, VCM = - 0.1V to 4 V 88 72 72 72 72 dB MIN VS = 5.5V, VCM = - 0.1V to 5.6 V 78 60 59 59 57 dB MIN Open-Loop Voltage Gain( AOL) RL = 5KΩ ,Vo = 0.1V to 4.9V 90 80 80 80 78 dB MIN RL =100KΩ ,Vo = 0.035V to 4.965V 94 85 85 85 82 dB MIN 2.7 µV/℃ TYP 0.008 V TYP MIN Input Offset Voltage Drift (∆VOS/∆T) OUTPUT CHARACTERISTICS Output Voltage Swing from Rail RL = 100KΩ Output Current (IOUT) POWER 23 20 19.1 18.8 18 mA 2.1 2.5 2.5 2.5 V MIN 5.5 5.5 5.5 5.5 V MAX SUPPLY Operating Voltage Range Power Supply Rejection Ratio (PSRR) Quiescent Current / Amplifier (IQ) DYNAMIC PERFORMANCE Vs = +2.5 V to + 5.5 V VCM = (-VS) + 0.5 92 76 74 71 70 dB MIN IOUT = 0 42 54 59 60 64 µA MAX 1.1 MHz TYP CL = 100pF Gain-Bandwidth Product (GBP) Slew Rate (SR) G = +1 , 2V Output Step 0.52 V/µs TYP Settling Time to 0.1%( tS) G = +1, 2 V Output Step 5.3 µs TYP Overload Recovery Time VIN ·Gain = Vs 2.6 µs TYP f = 1kHz 27 nV/ Hz TYP f = 10kHz 20 nV/ Hz TYP NOISE PERFORMANCE Voltage Noise Density (en) Specifications subject to change without notice. ２ SGM8541/8542/8544 PACKAGE/ORDERING INFORMATION MODEL SGM8541 SGM8542 SGM8544 ORDER NUMBER PACKAGE DESCRIPTION PACKAGE OPTION MARKING INFORMATION SGM8541XN5/TR SOT23-5 Tape and Reel, 3000 8541 SGM8541XS/TR SO-8 Tape and Reel, 2500 SGM8541XS SGM8542XS/TR SO-8 Tape and Reel, 2500 SGM8542XS SGM8542XMS/TR MSOP-8 Tape and Reel, 3000 SGM8542XMS SGM8544XS/TR SO-16 Tape and Reel, 2500 SGM8544XS SGM8544XTS TSSOP-16 Tape and Reel, 3000 SGM8544XTS ABSOLUTE MAXIMUM RATINGS CAUTION Supply Voltage, V+ to V- ........................................... 7.5 V Common-Mode Input Voltage ...........................................(–VS )– 0.5 V to (+VS) +0.5V Storage Temperature Range.................. –65℃ to +150℃ Junction Temperature ............................................... 150℃ Operating Temperature Range ........... –55℃ to +150℃ 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. Package Thermal Resistance @ TA = 25℃ SOT23-5, θJA.............................................................. 190℃/W SO-8, θJA......................................................................125℃/W MSOP-8, θJA.............................................................. 216℃/W SO-16, θJA..................................................................... 82℃/W TSSOP-16, θJA............................................................ 105℃/W Lead Temperature Range (Soldering 10 sec) .....................................................260℃ ESD Susceptibility HBM................................................................................4000V MM....................................................................................400V 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 SGM8541/8542/8544 TYPICAL PERFORMANCE CHARACTERISTICS At TA = +25℃, VS = +5V, and RL = 100kΩ connected to Vs/2,unless otherwise noted. Small-Signal Step Response Large-Signal Step Response G = +1 CL = 100pF RL = 100KΩ 500mV/div 20mV/div G = +1 CL = 100pF RL = 100KΩ 10µs/div 2µs/div Small-Signal Overshoot vs.Load Capacitance Small-Signal Overshoot vs.Load Capacitance 60 G = -5 RFB = 100KΩ 50 Small-Signal Overshoot(%) 40 30 20 10 0 G = -1 RFB = 100KΩ 50 40 30 G = +1 RL = 100KΩ 20 10 0 10 100 1000 Load Capacitance(pF) 10000 10 6 100 1000 Load Capacitance(pF) 10000 Quiescent And Short-Circuit Current vs.Supply Voltage Maximum Output Voltage vs.Frequency 50 30 Quiescent Current(μA) VS = 5.5V 5 Output Voltage(Vp-p) G = -1 RFB = 5KΩ VS = 5V 4 Maximum Output Voltage Without Slew-Rate Induced Distortion 3 VS = 2.5V 2 1 0 1 10 100 1000 Frequency(kHz) 10000 45 25 35 15 ISC 30 10 25 5 2 ４ 20 IQ 40 2.5 3 3.5 4 4.5 Supply Voltage(V) 5 Short-Circuit Current(mA) Small-Signal Overshoot(%) 60 5.5 SGM8541/8542/8544 TYPICAL PERFORMANCE CHARACTERISTICS At TA = +25℃, VS = +5V, and RL = 100kΩ connected to Vs/2,unless otherwise noted. Input Voltage Noise Spectral Density vs.Frequency CMRR And PSRR vs.Frequency 100 1000 Voltage Noise(nV/√Hz) 90 CMRR,PSRR(dB) 80 70 60 CMRR 50 40 PSRR 30 20 100 10 0 0.01 0.1 1 10 100 Frequency(kHz) 1000 10 0.01 10000 Output Voltage Swing vs.Output Current 10 100 Output Voltage Swing vs.Output Current 135℃ Sourcing Current 135℃ Output Voltage(V) 25℃ -50℃ 2 VS = 5V 25℃ 4 VS = 3V 1 -50℃ 25℃ 135℃ Sinking Current -50℃ Sourcing Current 3 2 Sinking Current -50℃ 1 25℃ 135℃ 0 0 0 4 8 12 16 20 0 5 10 Output Current(mA) 55 110 Open–Loop Gain(dB) 120 VS = 5V 45 VS = 3V VS = 2.5V 40 20 25 30 Open-Loop Gain vs.Temperature 60 50 15 Output Current(mA) Supply Current vs.Temperature Supply Current(μA) 1 Frequency(kHz) 5 3 Output Voltage(V) 0.1 35 30 RL = 5kΩ RL = 100kΩ 100 90 80 70 60 -50 -30 -10 10 30 50 70 Temperature(℃) 90 110 130 -50 -30 -10 ５ 10 30 50 70 Temperature(℃) 90 110 130 SGM8541/8542/8544 TYPICAL PERFORMANCE CHARACTERISTICS At TA = +25℃, VS = +5V, and RL = 100kΩ connected to Vs/2,unless otherwise noted. Common-Mode Rejection Ratio vs.Temperature Power-Supply Rejection Ratio vs.Temperature 120 120 -Vs < VCM < (+Vs)-1.5V 110 110 100 90 PSRR(dB) -Vs < VCM <(+Vs) 80 90 80 70 70 60 60 -50 -30 -10 10 30 50 70 Temperature(℃) -50 -30 -10 10 30 50 70 Temperature(℃) 90 110 130 Overload Recovery Time Offset Voltage Production Distribution Vs = 5V G = -5 VIN = 500mV Percent of Amplifiers(%) 0V 500mV 0V 24 21 Typical production distribution of packaged units. 18 15 12 9 6 3 3 2 2.5 1.5 1 0 0.5 -1 -0.5 Time(2µs/div) -2 -3 0 -1.5 2.5V 90 110 130 27 -2.5 CMRR(dB) 100 Offset Voltage(mV) ６ SGM8541/8542/8544 Power-Supply Bypassing and Layout APPLICATION NOTES The SGM854X family operates from either a single +2.5V to +5.5V supply or dual ±1.25V to ±2.75V supplies. For single-supply operation, bypass the power supply VDD with a 0.1µF ceramic capacitor which should be placed close to the VDD pin. For dual-supply operation, both the VDD and the VSS supplies should be bypassed to ground with separate 0.1µF ceramic capacitors. 2.2µF tantalum capacitor can be added for better performance. Driving Capacitive Loads The SGM854X can directly drive 250pF in unity-gain without oscillation. The unity-gain follower (buffer) is the most sensitive configuration to capacitive loading. Direct capacitive loading reduces the phase margin of amplifiers and this results in ringing or even oscillation. Applications that require greater capacitive drive capability should use an isolation resistor between the output and the capacitive load like the circuit in Figure 1. The isolation resistor RISO and the load capacitor CL form a zero to increase stability. The bigger the RISO resistor value, the more stable VOUT will be. Note that this method results in a loss of gain accuracy because RISO forms a voltage divider with the RLOAD. VDD VDD 10µF 10µF 0.1µF 0.1µF RISO Vn VOUT SGM8541 VIN Vn CL SGM8541 VOUT VOUT SGM8541 Vp 10µF Vp Figure 1. Indirectly Driving Heavy Capacitive Load An improvement circuit is shown in Figure 2, It provides DC accuracy as well as AC stability. RF provides the DC accuracy by connecting the inverting signal with the output, CF and RIso serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the amplifier’s inverting input, thereby preserving phase margin in the overall feedback loop. 0.1µF VSS(GND) VSS Figure 3. Amplifier with Bypass Capacitors CF RF RISO SGM8541 VIN VOUT CL RL Figure 2. Indirectly Driving Heavy Capacitive Load with DC Accuracy For no-buffer configuration, there are two others ways to increase the phase margin: (a) by increasing the amplifier’s gain or (b) by placing a capacitor in parallel with the feedback resistor to counteract the parasitic capacitance associated with inverting node. ７ SGM8541/8542/8544 Typical Application Circuits C Differential Amplifier R2 The circuit shown in Figure 4 performs the difference function. If the resistors ratios are equal ( R4 / R3 = R2 / R1 ), then VOUT = ( Vp – Vn ) × R2 / R1 + Vref. R1 VIN R2 Vn SGM8541 VOUT R1 VOUT SGM8541 R3 = R1 // R2 Vp R3 Figure 6. Low Pass Active Filter R4 Vref Figure 4. Differential Amplifier Instrumentation Amplifier The circuit in Figure 5 performs the same function as that in Figure 4 but with the high input impedance. R2 R1 SGM8541 Vn VOUT SGM8541 Vp SGM8541 R3 R4 Vref Figure 5. Instrumentation Amplifier Low Pass Active Filter The low pass filter shown in Figure 6 has a DC gain of ( - R2 / R1 ) and the –3dB corner frequency is 1/2πR2C. Make sure the filter is within the bandwidth of the amplifier. The Large values of feedback resistors can couple with parasitic capacitance and cause undesired effects such as ringing or oscillation in high-speed amplifiers. Keep resistors value as low as possible and consistent with output loading consideration. ８ SGM8541/8542/8544 PACKAGE OUTLINE DIMENSIONS SOT23-5 D θ b 0.20 Symbol L E E1 e C A1 e1 Min Max Min Max 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.400 0.012 0.016 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 e1 L A A2 Dimensions In Inches 1.050 e ９ Dimensions In Millimeters A L 0 0.950TYP 1.800 2.000 0.700REF 0.037TYP 0.071 0.079 0.028REF L1 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8° SGM8541/8542/8544 PACKAGE OUTLINE DIMENSIONS SO-8 D C E E1 L Symbol θ e Min Max Min Max 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 B 0.330 0.510 0.013 0.020 C 0.190 0.250 0.007 0.010 D 4.780 5.000 0.188 0.197 E 3.800 4.000 0.150 0.157 E1 5.800 6.300 0.228 0.248 A1 1.270TYP 0.050TYP L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° A A2 Dimensions In Inches A e B Dimensions In Millimeters １０ SGM8541/8542/8544 PACKAGE OUTLINE DIMENSIONS MSOP-8 C E θ e A2 A A1 E1 L b Symbol Dimensions In Millimeters Min Max Dimensions In Inches Min Max A A1 A2 b c D e E E1 L θ 0.800 1.200 0.000 0.200 0.760 0.970 0.30 TYP 0.15 TYP 2.900 3.100 0.65 TYP 2.900 3.100 4.700 5.100 0.410 0.650 0° 6° 0.031 0.047 0.000 0.008 0.030 0.038 0.012 TYP 0.006 TYP 0.114 0.122 0.026 TYP 0.114 0.122 0.185 0.201 0.016 0.026 0° 6° D １１ SGM8541/8542/8544 PACKAGE OUTLINE DIMENSIONS SO-16 D L C E A A1 A2 b c D E E1 e L θ θ A1 A e A2 E1 Symbol Dimensions In Millimeters Min Max Dimensions In Inches Min Max 1.350 1.750 0.100 0.250 1.350 1.550 0.330 0.510 0.170 0.250 9.800 10.20 3.800 4.000 5.800 6.200 1.270 (BSC) 0.400 1.270 0° 8° 0.053 0.069 0.004 0.010 0.053 0.061 0.013 0.020 0.007 0.010 0.386 0.402 0.150 0.157 0.228 0.244 0.050 (BSC) 0.016 0.050 0° 8° b １２ SGM8541/8542/8544 PACKAGE OUTLINE DIMENSIONS TSSOP-16 A b E E1 Symbol PIN #1 IDENT. A2 A e C θ A L D D E b c E1 A A2 A1 e L H θ Dimensions In Millimeters Min Max 4.900 4.300 0.190 0.090 6.250 5.100 4.500 0.300 0.200 6.550 1.100 0.800 1.000 0.020 0.150 0.65 (BSC) 0.500 0.700 0.25(TYP) 1° 7° Dimensions In Inches Min Max 0.193 0.169 0.007 0.004 0.246 0.201 0.177 0.012 0.008 0.258 0.043 0.031 0.039 0.001 0.006 0.026 (BSC) 0.020 0.028 0.01(TYP) 1° 7° H A1 １３ SGM8541/8542/8544 REVISION HISTORY Location Page 11/06— Data Sheet changed from REV.A to REV.B Changes to ABSOLUTE MAXIMUM ATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 １４ SGM8541/8542/8544