GS6044-TR

GS6041/6042/6043/6044 600nA 15KHZ CMOS Rail-to-Rail IO Opamp with RF Filter Features  Single-Supply Operation from +1.4V ~ +5.5V  Small Package:  Rail-to-Rail Input / Output GS6041 Available in SOT23-5 and SC70-5 Packages  Gain-Bandwidth Product: 15KHz (Typ.) GS6042 Available in SOP-8, MSOP-8 and DFN-8  Low Input Bias Current: 1pA (Typ.) Packages  Low Offset Voltage: 2.5mV (Max.) GS6043 Available in SOP-8 and MSOP-8 Packages  Quiescent Current: 600nA per Amplifier (Typ.) GS6044 Available in SOP-14 and TSSOP-14 Packages  Operating Temperature: -40°C ~ +125°C  Embedded RF Anti-EMI Filter General Description The GS6041 family has a high gain-bandwidth product of 15KHz, a slew rate of 4.5V/ms, and a quiescent current of 600nA/amplifier at 5V. The GS6041 family is designed to provide optimal performance in low voltage and low noise systems. They provide rail-to-rail output swing into heavy loads. The input common mode voltage range includes ground, and the maximum input offset voltage is 2.5mV for GS6041 family. They are specified over the extended industrial temperature range (-40℃ to +125℃). The operating range is from 1.4V to 5.5V. The GS6041 single is available in Green SC70-5 and SOT23-5 packages. The GS6042 Dual is available in Green SOP-8, MSOP-8 and DFN-8 packages. The GS6044 Quad is available in Green SOP-14 and TSSOP-14 packages. Applications  ASIC Input or Output Amplifier  Audio Output  Sensor Interface  Piezoelectric Transducer Amplifier  Medical Communication  Medical Instrumentation  Smoke Detectors  Portable Systems Pin Configuration Figure 1. Pin Assignment Diagram V1 1/17 GS6041/6042/6043/6044 Absolute Maximum Ratings Condition Min Max -0.5V +7.5V Analog Input Voltage (IN+ or IN-) Vss-0.5V VDD+0.5V PDB Input Voltage Vss-0.5V +7V -40°C +125°C Power Supply Voltage (VDD to Vss) Operating Temperature Range Junction Temperature Storage Temperature Range Lead Temperature (soldering, 10sec) +160°C -55°C +150°C +260°C Package Thermal Resistance (TA=+25℃) SOP-8, θJA 125°C/W MSOP-8, θJA 216°C/W SOT23-5, θJA 190°C/W SC70-5, θJA 333°C/W ESD Susceptibility HBM 6KV MM 300V Note: Stress greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions outside those indicated in the operational sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. V1 2/17 GS6041/6042/6043/6044 Package/Ordering Information MODEL GS6041 GS6042 CHANNEL Single Dual GS6043 Single GS6044 Quad V1 PACKAGE PACKAGE MARKING DESCRIPTION OPTION INFORMATION GS6041-CR SC70-5 Tape and Reel,3000 6041 GS6041-TR SOT23-5 Tape and Reel,3000 6041 GS6041-SR SOP-8 Tape and Reel,4000 GS6041 GS6041-MR MSOP-8 Tape and Reel,3000 GS6041 GS6042-SR SOP-8 Tape and Reel,4000 GS6042 GS6042-MR MSOP-8 Tape and Reel,3000 GS6042 GS6042-FR DFN-8 Tape and Reel,3000 GS6042 GS6043-SR SOP-8 Tape and Reel,4000 GS6043 GS6043-MR MSOP-8 Tape and Reel,3000 GS6043 GS6044-TR TSSOP-14 Tape and Reel,3000 GS6044 GS6044-SR SOP-14 Tape and Reel,2500 GS6044 ORDER NUMBER 3/17 GS6041/6042/6043/6044 Electrical Characteristics (At VS = +5V, RL = 1MΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.) GS6041/6042/6044 PARAMETER SYMBOL CONDITIONS TYP MIN MAX UNITS 0.4 -2.5 2.5 mV INPUT CHARACTERISTICS Input Offset Voltage VOS VCM = VS/2 Input Bias Current IB 1 pA Input Offset Current IOS 1 pA Common-Mode Voltage Range VCM -0.1 to +5.6 V Common-Mode Rejection Ratio CMRR Open-Loop Voltage Gain Input Offset Voltage Drift VS = 5.5V VS = 5V, VCM = -0.1V to 2.5V 84 70 VS = 5V, VCM = -0.1V to 5.1V 83 67 Vs=1.4V, RL = 50kΩ, VO = Vs-0.1V 80 75 Vs=5V, RL = 50kΩ, VO = Vs-0.1V 93 84 dB AOL dB ΔVOS/ΔT 2.5 μV/℃ OUTPUT CHARACTERISTICS VOH 1.395 1.39 V Vs=1.4V, RL = 50kΩ VOL 4.5 10 mV Output Voltage Swing from Rail VOH 4.997 4.990 V Vs=5V, RL = 50kΩ VOL 3.5 ISOURCE Output Current 10 60 45 84 60 45 75 RL = 10Ω to VS/2 ISINK mV mA POWER SUPPLY 1.4 V 5.5 V Operating Voltage Range Power Supply Rejection Ratio PSRR Quiescent Current / Amplifier IQ VS = +1.4V to +5.5V, VCM = +0.5V 80 77 dB 600 nA 15 KHz 4.5 V/ms DYNAMIC PERFORMANCE (CL = 100pF) Gain-Bandwidth Product Slew Rate V1 GBP SR G = +1, 2V Output Step 4/17 GS6041/6042/6043/6044 Typical Performance characteristics o At TA=+25 C, VS=+5V, and RL=100KΩ connected to VS/2, unless otherwise noted. Small Signal Inverting Pulse Response Small Signal Non-Inverting Pulse Response VOUT(20mV/div) Time(4ms/div) VOUT(20mV/div) Time(4ms/div) Time(4ms/div) V1 Large Signal Non-Inverting Pulse Response VOUT(1V/div) VOUT(1V/div) Large Signal Inverting Pulse Response Time(4ms/div) 5/17 GS6041/6042/6043/6044 Typical Performance characteristics o At TA=+25 C, VS=+5V, and RL=100KΩ connected to VS/2, unless otherwise noted. Slew Rate vs. Temperature Slew Rate(V/ms) Input,Output Voltage(V) No Phase Reversal Time(4ms/div) Temperature(℃) Input(2V/div) Output(2V/div) Output Settling Time Time(100us/div) V1 6/17 GS6041/6042/6043/6044 Application Note Size GS6041 family series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The small footprints of the GS6041 family packages save space on printed circuit boards and enable the design of smaller electronic products. Power Supply Bypassing and Board Layout GS6041 family series operates from a single 1.4V to 5.5V supply or dual ±0.7V to ±2.75V supplies. For best performance, a 0.1μF ceramic capacitor should be placed close to the VDD pin in single supply operation. For dual supply operation, both VDD and VSS supplies should be bypassed to ground with separate 0.1μF ceramic capacitors. Low Supply Current The low supply current (typical 500nA per channel) of GS6041 family will help to maximize battery life. They are ideal for battery powered systems Operating Voltage GS6041 family operates under wide input supply voltage (1.4V to 5.5V). In addition, all temperature specifications apply from o o -40 C to +125 C. Most behavior remains unchanged throughout the full operating voltage range. These guarantees ensure operation throughout the single Li-Ion battery lifetime Rail-to-Rail Input The input common-mode range of GS6041 family extends 100mV beyond the supply rails (VSS-0.1V to VDD+0.1V). This is achieved by using complementary input stage. For normal operation, inputs should be limited to this range. Rail-to-Rail Output Rail-to-Rail output swing provides maximum possible dynamic range at the output. This is particularly important when operating in low supply voltages. The output voltage of GS6041 family can typically swing to less than 10mV from supply rail in light resistive loads (>50kΩ). Capacitive Load Tolerance The GS6041 family is optimized for bandwidth and speed, not for driving capacitive loads. Output capacitance will create a pole in the amplifier’s feedback path, leading to excessive peaking and potential oscillation. If dealing with load capacitance is a requirement of the application, the two strategies to consider are (1) using a small resistor in series with the amplifier’s output and the load capacitance and (2) reducing the bandwidth of the amplifier’s feedback loop by increasing the overall noise gain. Figure 2. shows a unity gain follower using the series resistor strategy. The resistor isolates the output from the capacitance and, more importantly, creates a zero in the feedback path that compensates for the pole created by the output capacitance. Figure 2. Indirectly Driving a Capacitive Load Using Isolation Resistor The bigger the RISO resistor value, the more stable VOUT will be. However, if there is a resistive load RL in parallel with the capacitive load, a voltage divider (proportional to RISO/RL) is formed, this will result in a gain error. The circuit in Figure 3 is an improvement to the one in Figure 2. RF provides the DC accuracy by feed-forward the VIN to RL. CF V1 7/17 GS6041/6042/6043/6044 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 the phase margin in the overall feedback loop. Capacitive drive can be increased by increasing the value of CF. This in turn will slow down the pulse response. Figure 3. Indirectly Driving a Capacitive Load with DC Accuracy V1 8/17 GS6041/6042/6043/6044 Typical Application Circuits Differential amplifier The differential amplifier allows the subtraction of two input voltages or cancellation of a signal common the two inputs. It is useful as a computational amplifier in making a differential to single-end conversion or in rejecting a common mode signal. Figure 4. shown the differential amplifier using GS6041 family. Figure 4. Differential Amplifier VOUT ( RR13RR24 ) RR14 VIN  RR12 VIP ( RR13RR24 ) RR31 VREF If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then VOUT  R2 R1 (VIP  VIN )  VREF Low Pass Active Filter The low pass active filter is shown in Figure 5. The DC gain is defined by –R2/R1. The filter has a -20dB/decade roll-off after its corner frequency ƒC=1/(2πR3C1). Figure 5. Low Pass Active Filter V1 9/17 GS6041/6042/6043/6044 Instrumentation Amplifier The triple GS6041 family can be used to build a three-op-amp instrumentation amplifier as shown in Figure 6. The amplifier in Figure 6 is a high input impedance differential amplifier with gain of R2/R1. The two differential voltage followers assure the high input impedance of the amplifier. Figure 6. Instrument Amplifier . V1 10/17 GS6041/6042/6043/6044 Package Information MSOP-8 V1 11/17 GS6041/6042/6043/6044 SOP-8 V1 12/17 GS6041/6042/6043/6044 SOT23-5 V1 13/17 GS6041/6042/6043/6044 TSSOP-14 V1 14/17 GS6041/6042/6043/6044 SC70-5 V1 15/17 GS6041/6042/6043/6044 SOP-14 V1 16/17 GS6041/6042/6043/6044 DFN-8 V1 17/17