RS8558XM

RS8557,RS8558,RS8559 Zero-Drift, Rail-to-Rail I/O CMOS Operational Amplifiers Features • • • • • • • • • • • • Description The RS8557,RS8558,RS8559 series of CMOS operational amplifiers use auto-zero techniques to simultaneously provide very low offset voltage (50μV max) and near-zero drift over time and temperature. This family of amplifiers has ultralow noise, offset and power. Low Offset Voltage: 20uV Input Offset Drift: 0.03μV/°C High Gain Bandwidth Product: 4.3MHz Rail-to-Rail Input and Output High Gain, CMRR, PSRR:120dB High Slew Rate: 2.5V/μs Low Noise: 0.93uVp-p (0.01~10Hz) Low Power Consumption: 650μA /op amp Overload Recovery Time:1us Low Supply Voltage: +2.7 V to +5.5 V No External Capacitors Required Extended Temperature: -40°C to +125°C This miniature, high-precision operational amplifiers offset high input impedance and rail-to-rail input and rail-to-rail output swing. With high gain-bandwidth product of 4.3MHz and slew rate of 2.5V/μs. Single or dual supplies as low as +2.7V (±1.35V) and up to +5.5V (±2.75V) may be used. The RS8557/RS8558/RS8559 are specified for the extended industrial and automotive temperature range (-40°C to 125°C). The RS8557 single amplifier is available in 5-lead SOT23, 8-lead MSOP8 and 8-lead SOIC packages, The RS8558 dual amplifier is available in 8-lead SOIC and 8-lead MSOP narrow surface mount packages, The RS8559 quad amplifier is available in 14-lead SOIC and 14-lead narrow TSSOP packages. Applications • • • • • • • • Temperature Sensors Medical/Industrial Instrumentation Pressure Sensors Battery-Powered Instrumentation Active Filtering Weight Scale Sensor Strain Gage Amplifiers Power Converter/Inverter REV B.2 1 www.run-ic.com RS8557, RS8558, RS8559 PIN CONFIGURATIONS 1 V- 2 +IN 3 5 + - NC 1 -IN 2 +IN 3 V- 4 8 NC - OUT 7 V+ + RS8557 RS8557 6 OUT 5 NC V+ 4 -IN SOT23-5 SOIC-8(SOP8),MSOP-8 RS8559 RS8558 OUT A 1 8 V+ -IN A 2 7 OUTB +IN A 3 6 -IN B 5 +IN B V- 4 + A B+ SOIC-8(SOP8),MSOP-8 OUT A 1 -IN A 2 +IN A 14 OUT D 13 -IN D 3 12 +IN D V+ 4 11 V- +IN B 5 10 +IN C 9 -IN C 8 OUT C -IN B 6 OUT B 7 A - + - + B D + - + C SOIC-14(SOP14),TSSOP-14 Note: NC indicates no internal connection 2 www.run-ic.com RS8557, RS8558, RS8559 ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage, V+ to V-...............................................7.0V Input Terminals, Voltage (2) …………... – 0.5 to (V+) + 0.5V Current (2)…………………....…..... ±10mA Storage Temperature ……….…………… −65°C to +150°C Operating Temperature ……….………… −40°C to +125°C Junction Temperature................................................150°C Package Thermal Resistance @ TA = +25°C SOT23-5, SOT23-6………………….………………200°C/W MSOP-10, SOIC-8 …………………….…………... 150°C/W SOIC-14, TSSOP-14………….……….……………100°C/W Lead Temperature (Soldering, 10s) ……………........260°C ESD Susceptibility HBM …......................................................................5000V MM ……………………….........………………...……….400V ESD SENSITIVITY CAUTION 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. (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. (2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails should be current-limited to 10mA or less. PACKAGE/ORDERING INFORMATION °C °C °C °C °C °C °C °C °C °C °C °C °C °C 3 www.run-ic.com RS8557, RS8558, RS8559 ELECTRICAL CHARACTERISTICS Boldface limits apply over the specified temperature range, TA = –40°C to +125°C. (At TA = +250C, Vs=5V, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.) PARAMETER CONDITION RS8557,RS8558, RS8559 MIN TYP UNIT MAX OFFSET VOLTAGE Input Offset Voltage VS Temperature VS Power Supply Vos VCM = Vs/2 dVos/dT PSRR VS = +2.7V to +5.5V, VCM = 0 105 Channel Separation, dc 20 50 μV 0.03 0.2 μV/0C 120 dB 0.13 μV/V 50 pA 10 pA INPUT BIAS CURRENT Input Bias Current IB Input Offset Current Ios VCM = Vs/2 NOISE PERFORMANCE Input Voltage Noise enp-p f=0.01Hz to 10Hz 0.93 μVpp Input Voltage Noise enp-p f=0.01Hz to 1Hz 0.32 μVpp Input Voltage Noise Density en f=1KHz 45 nV/√Hz Input Current Noise Density in f=10Hz 2.3 fA/√Hz INPUT VOLTAGE RANGE Common-Mode Voltage Range VCM (V-)-0.2 Common-Mode Rejection Ratio CMRR (V–) – 0.2V < VCM < (V+)+ 0.2V 105 (V+)+0.2 V 120 dB Differential 1 pF Common-Mode 5 pF 120 dB 2.5 V/μs 4.3 MHz 1 us INPUT CAPACITANCE OPEN-LOOP GAIN Open-Loop Voltage Gain AOL RL=10KΩ, VO=0.3V to 4.7V, -40°C~125°C SR G=+1 105 DYNAMIC PERFORMANCE Slew Rate Gain-Bandwidth Product GBW Overload Recovery Time OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Current VOH VOL RL=100 KΩ to GND 4.99 4.998 V RL=10 KΩ to GND 4.95 4.98 V RL=100 KΩ to V+ 1 10 mV RL=10 KΩ to V+ 10 30 mV ISC 48 mA POWER SUOOLY Operating Voltage Range Quiescent Current/ Amplifier 2.7 IQ 650 4 5.5 V 900 uA www.run-ic.com RS8557, RS8558, RS8559 TYPICAL CHARACTERISTICS At TA = +25C, Vs=5V, RL = 10kΩ connected to VS/2, VOUT = VS/2, unless otherwise noted. OFFSET VOLTAGE PRODUCTION DISTRIBUTION Population Number Of Amplifiers 6 OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION 5 4 3 2 1 0 -50 -40 -30 -20 -10 0 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 10 20 30 40 50 Offset Voltage (uV) Input Offset Drift (nV/℃) OPEN−LOOP GAIN AND PHASE vs FREQUENCY Open-Loop Gain(dB) 120 Phase 100 130 110 90 80 70 60 50 40 30 20 Input Bias Current(pA) Gain Phase Margin (°) 140 INPUT BIAS CURRENT vs TEMPERATURE 10K 100 10 0 -20 10 1K 10 -10 10M 100K Frequency(Hz) -40 -20 0 20 40 60 80 100 120 140 Temperature(℃) POWER−SUPPLY REJECTION RATIO vs FREQUENCY 140 140 120 COMMON−MODE REJECTION RATIO vs FREQUENCY 120 100 100 CMRR(dB) PSRR(dB) 1K 80 60 40 80 60 40 20 20 0 100 1K 10K 100K 1M 0 10M 100 Frequency(Hz) 5 1K 10K 100K Frequency(Hz) 1M 10M www.run-ic.com RS8557, RS8558, RS8559 TYPICAL CHARACTERISTICS At TA = +25C, Vs=5V, RL = 10kΩ connected to VS/2, VOUT = VS/2, unless otherwise noted. QUIESCENT CURRENT vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 660 650 Quiescent Current(uA) Quiescent Current(uA) 660 640 630 620 610 650 640 630 620 610 600 -40 -20 0 -40 -20 0 20 40 60 80 100 120 140 Temperature(℃) Vs=2.7V 20 40 60 80 100 120 140 Temperature(℃) Vs=5V SINK CURRENT vs TEMPERATURE 70 65 65 Sink Current(mA) 70 60 55 50 60 55 50 45 45 40 40 -40 -20 0 -40 -20 0 20 40 60 80 100 120 140 Temperature(℃) 20 40 60 80 100 120 140 Temperature(℃) LARGE−SIGNAL STEP RESPONSE SMALL−SIGNAL STEP RESPONSE CL=100PF CL=100PF 1V/div 50mV/div Source Current(mA) SOURCE CURRENT vs TEMPERATURE 200ns/div 1us/div 6 www.run-ic.com RS8557, RS8558, RS8559 TYPICAL CHARACTERISTICS At TA = +25C, Vs=5V, RL = 10kΩ connected to VS/2, VOUT = VS/2, unless otherwise noted. 0V 0V VS=±2.5V G=-100 VS=±2.5V G=-100 VOUT 200ns/DIV 200ns/DIV 0.01Hz TO 10Hz NOISE AT Vs=2.7V 200nV/div 400nV/div 0.01Hz TO 10Hz NOISE AT Vs=5V 10s/div 10s/div 0.01Hz TO 1Hz NOISE AT Vs=5V 200nV/div 0.01Hz TO 1Hz NOISE AT Vs=2.7V 100nV/div 0V 1V/div VOUT 200mV/div VIN VIN 1V/div 0V NEGATIVE OVERVOLTAGE RECOVERY 200mV/div POSITIVE OVERVOLTAGE RECOVERY 10s/div 10s/div 7 www.run-ic.com RS8557, RS8558, RS8559 APPLICATION NOTES OPERATING VOLTAGE The RS8557, RS8558, RS8559 series op amps are unity-gain stable and free from unexpected output phase reversal. They use auto-zeroing techniques to provide low offset voltage and very low drift over time and temperature. The RS8557, RS8558, RS8559 series op amps operate over a power-supply range of +2.7V to +5.5V (±1.35V to ±2.75V). Supply voltages higher than 7V (absolute maximum) can permanently damage the amplifier. Parameters that vary over supply voltage or temperature are shown in the Typical Characteristics section of this data sheet. Good layout practice mandates use of a 0.1µF capacitor placed closely across the supply pins. For lowest offset voltage and precision performance, circuit layout and mechanical conditions should be optimized. Avoid temperature gradients that create thermoelectric (Seebeck) effects in thermocouple junctions formed from connecting dissimilar conductors. These thermally-generated potentials can be made to cancel by assuring that they are equal on both input terminals. LAYOUT GUIDELINES Attention to good layout practices is always recommended. Keep traces short. When possible, use a PCB ground plane with surface-mount components placed as close to the device pins as possible. Place a 0.1µF capacitor closely across the supply pins. These guidelines should be applied throughout the analog circuit to improve performance and provide benefits such as reducing the EMI (electromagnetic-interference) susceptibility. • Use low thermoelectric-coefficient connections (avoid dissimilar metals). • Thermally isolate components supplies or other heat-sources. from power • Shield op amp and input circuitry from air currents, such as cooling fans. Following these guidelines will reduce the likelihood of junctions being at different temperatures, which can cause thermoelectric voltages of 0.1µV/°C or higher, depending on materials used. Figure 1. The Layout of Guard Ring 8 www.run-ic.com RS8557, RS8558, RS8559 PACKAGE OUTLINE DIMENSIONS SOT23-5 D 1.90 b 2.59 E1 E 0.99 0.95 0.69 e e1 RECOMMENDED LAND PATTERN (Unit: mm) 0.2 A A2 L A1 Symbol c θ Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.050 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 0.500 0.012 0.020 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 e 0.950(BSC) 0.037(BSC) e1 1.800 2.000 0.071 0.079 L 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8° 9 www.run-ic.com RS8557, RS8558, RS8559 MSOP-8 b e E E1 4.8 1.02 D 0.65 0.41 RECOMMENDED LAND PATTERN (Unit: mm) A2 c A A1 L Symbol Dimensions In Millimeters θ Dimensions In Inches Min Max Min Max A 0.820 1.100 0.032 0.043 A1 0.020 0.150 0.001 0.006 A2 0.750 0.950 0.030 0.037 b 0.250 0.380 0.010 0.015 c 0.090 0.230 0.004 0.009 D 2.900 3.100 0.114 0.122 e 0.650(BSC) 0.026(BSC) E 2.900 3.100 0.114 0.122 E1 4.750 5.050 0.187 0.199 L 0.400 0.800 0.016 0.031 θ 0° 6° 0° 6° 10 www.run-ic.com RS8557, RS8558, RS8559 TSSOP-14 e b 5.6 E1 E 1.78 D 0.65 0.42 RECOMMENDED LAND PATTERN (Unit: mm) A2 A A1 Symbol H C θ L Dimensions In Millimeters Min Max A Dimensions In Inches Min Max 1.200 0.047 A1 0.050 0.150 0.002 0.006 A2 0.800 1.050 0.031 0.041 b 0.190 0.300 0.007 0.012 c 0.090 0.200 0.004 0.008 D 4.860 5.100 0.191 0.201 E 4.300 4.500 0.169 0.177 E1 6.250 6.550 0.246 0.258 e L 0.650(BSC) 0.500 H θ 0.026(BSC) 0.700 0.020 0.25(TYP) 1° 0.028 0.01(TYP) 7° 11 1° 7° www.run-ic.com RS8557, RS8558, RS8559 SOIC-8(SOP8) b e 5.2 E E1 2.2 D 1.27 0.6 RECOMMENDED LAND PATTERN (Unit: mm) A2 c A A1 L Symbol Dimensions In Millimeters θ Dimensions In Inches Min Max Min Max A 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 0.170 0.250 0.007 0.010 D 4.800 5.000 0.189 0.197 e 1.270(BSC) 0.050(BSC) E 5.800 6.200 0.228 0.244 E1 3.800 4.000 0.150 0.157 L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° 12 www.run-ic.com RS8557, RS8558, RS8559 SOIC-14(SOP14) e b 5.2 1.27 E E1 0.6 D 1.27 RECOMMENDED LAND PATTERN (Unit: mm) A2 A1 A c θ L Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 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 0.310 0.510 0.012 0.020 c 0.100 0.250 0.004 0.010 D 8.450 8.850 0.333 0.348 e 1.270(BSC) 0.050(BSC) E 5.800 6.200 0.228 0.244 E1 3.800 4.000 0.150 0.157 L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° 13 www.run-ic.com