GS8042-MR

GS8041/8042/8043 600nA 14.5KHZ CMOS Rail-to-Rail IO Opamp with RF Filter Features • Single-Supply Operation from +1.4V ~ +5.5V • Operating Temperature: -40°C ~ +125°C • Rail-to-Rail Input / Output • Embedded RF Anti-EMI Filter • Gain-Bandwidth Product: 14.5KHz (Typ) • Small Package: • Low Input Bias Current: 1pA (Typ) GS8041 Available in SOT23-5 and SC70-5 Packages • Low Offset Voltage: 3mV (Max) GS8042 Available in SOP-8 and MSOP-8 Packages • Quiescent Current: 600nA per Amplifier (Typ) GS8043NH Available in SOT23-6 and SC70-6 Packages • Chip Select with GS8043NH( active High ) and GS8043NL Available in SOT23-6 and SC70-6 Packages GS8043NL(active Low ) General Description The GS804X family has a high gain-bandwidth product of 14.5KHz, a slew rate of 6V/ms, and a quiescent current of 600nA/amplifier at 5V. The GS804X 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 3mV for GS804X family. They are specified over the extended industrial temperature range (-40 ℃ to +125℃). The operating range is from 1.4V to 5.5V. The GS8041 single is available in Green SC70-5 and SOT23-5 packages. The GS8042 Dual is available in Green SOP-8 and MSOP-8 packages. The GS8043 single is available in Green SC70-6 and SOT23-6 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 March 2020-REV_V2 1/15 GS8041/8042/8043 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 +160°C Storage Temperature Range -55°C Lead Temperature (soldering, 10sec) Package Thermal Resistance (TA=+25 +150°C +260°C ℃) SOP-8, θJA 125°C/W MSOP-8, θJA 216°C/W SOT23-5, θJA 190°C/W SOT23-6, θJA 190°C/W SC70-5, θJA 333°C/W SC70-6, 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. Package/Ordering Information MODEL CHANNEL GS8041 Single GS8042 Dual GS8043NH Single GS8043NL Single March 2020-REV_V0 PACKAGE PACKAGE MARKING DESCRIPTION OPTION INFORMATION GS8041-CR SC70-5 Tape and Reel,3000 8041 GS8041-TR SOT23-5 Tape and Reel,3000 8041 GS8042-SR SOP-8 Tape and Reel,4000 GS8042 GS8042-MR MSOP-8 Tape and Reel,3000 GS8042 GS8043NH-CR SC70-6 Tape and Reel,4000 043H GS8043NH-TR SOT23-6 Tape and Reel,3000 GS8043NH GS8043NL-CR SC70-6 Tape and Reel,4000 043L GS8043NL-TR SOT23-6 Tape and Reel,3000 GS8043NL ORDER NUMBER 2/15 GS8041/8042/8043 Electrical Characteristics (At VS = +5V, RL = 1MΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.) GS8041/8042/8043 PARAMETER SYMBOL CONDITIONS TYP MIN MAX UNITS 3 mV INPUT CHARACTERISTICS Input Offset Voltage VOS VCM = VS/2 0.4 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 78 66 VS = 5V, VCM = -0.1V to 5.1V 84 67 Vs=1.4V, RL = 50kΩ, VO = Vs-0.1V 86 75 Vs=5V, RL = 50kΩ, VO = Vs-0.1V 93 84 dB dB AOL ∆VOS/∆T 2.5 µV/ ℃ OUTPUT CHARACTERISTICS VOH 1.395 1.390 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 mV 20 RL = 10Ω to VS/2 ISINK mA 20 POWER SUPPLY 1.4 V 5.5 V Operating Voltage Range Power Supply Rejection Ratio PSRR Quiescent Current / Amplifier IQ Shutdown Current / Amplifier IQ_off VS = +1.4V to +5.5V, VCM = +0.5V GS8043NH / GS8043NL 80 77 dB 600 nA 54 nA 14.5 KHz 6 V/ms DYNAMIC PERFORMANCE (CL = 100pF) Gain-Bandwidth Product Slew Rate March 2020-REV_V0 GBP SR G = +1, 2V Output Step 3/15 GS8041/8042/8043 Typical Performance characteristics o At TA=+25 C, VS=+5V, and RL=100KΩ connected to VS/2, unless otherwise noted. Large Signal Non-Inverting Pulse Response VOUT(1V/div) VOUT(1V/div) Large Signal Inverting Pulse Response Time(10ms/div) Time(10ms/div) Small Signal Non-Inverting Pulse Response VOUT(25mV/div) VOUT(25mV/div) Small Signal Inverting Pulse Response Time(10ms/div) Time(10ms/div) March 2020-REV_V0 4/15 GS8041/8042/8043 Typical Performance characteristics o At TA=+25 C, VS=+5V, and RL=100KΩ connected to VS/2, unless otherwise noted. Input(1V/div) Input,Output Voltage(V) Time(10ms/div) March 2020-REV_V0 Output Settling Time Output(1V/div) No Phase Reversal Time(1ms/div) 5/15 GS8041/8042/8043 Application Note Size GS804X family series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The small footprints of the GS804X family packages save space on printed circuit boards and enable the design of smaller electronic products. Power Supply Bypassing and Board Layout GS804X 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 600nA per channel) of GS804X family will help to maximize battery life. They are ideal for battery powered systems. Operating Voltage GS804X 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 GS804X 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 GS804X family can typically swing to less than 50mV from supply rail in light resistive loads (>50kΩ). Capacitive Load Tolerance The GS804X 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. - RISO VOUT VIN + CL Figure 2. Indirectly Driving a Capacitive Load Using Isolation Resistor March 2020-REV_V0 6/15 GS8041/8042/8043 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 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 March 2020-REV_V0 7/15 GS8041/8042/8043 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 GS804X family. Figure 4. Differential Amplifier VOUT= ( RR13++RR24 ) RR41 VIN − RR12 VIP +( RR13++RR24 ) RR13 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 March 2020-REV_V0 8/15 GS8041/8042/8043 Instrumentation Amplifier The triple GS804X 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 . March 2020-REV_V0 9/15 GS8041/8042/8043 Package Information MSOP-8 March 2020-REV_V0 10/15 GS8041/8042/8043 SOP-8 March 2020-REV_V0 11/15 GS8041/8042/8043 SOT23-5 March 2020-REV_V0 12/15 GS8041/8042/8043 SC70-5 March 2020-REV_V0 13/15 GS8041/8042/8043 SC70-6 March 2020-REV_V0 14/15 GS8041/8042/8043 SOT23-6 March 2020-REV_V0 15/15