COS3201TR

COS3201 1.6V to 7V, Low-power Push-Pull Output Comparators Features General Description ■ Operates on 1.6V ~ 7.0V Supplies The COS3201 is a single channel low-power ■ Low Quiescent Current: 18μA at 1.8V comparator which features wide supply voltage ■ Low Propagation Delay: 200 ns range and rail-to-rail push-pull output. Their ■ Low Input Offset Voltage: 1 mV operating voltage ranges from +1.6V to +7.0V, ■ Push-Pull Outputs making them ideal for 1.8, 3.3V and 5V ■ Input Common Mode Voltage Range systems. Includes Ground achieving a 200ns propagation delay. Input ■ Input Bias Current: 1.0 pA Typical bias current is typically 1.0pA, and input offset ■ No Phase Inversion for Overdrive Inputs voltage is typically 1 mV. ■ Extended Temperature Ranges ■ It consumes only 25μA while From -40°C to +125°C The COS3201 has push-pull output stages Small Packaging：SOT23-5 and SC70-5 capable of sinking and sourcing milliamps of current when controlling an LED or driving a capacitive load. The COS3201 is available in Applications ■ Inspection Equipment ■ Threshold Detectors/Discriminators ■ Peak and Zero-crossing detectors ■ Logic Level Shifting or Translation ■ Portable Equipment ■ Sensor Conditioning ■ High-Speed Sampling Systems ■ Battery Powered Electronics tiny 5-pin SOT23-5 and SC70-5 packages. COS3201 Rev1.0 Copyright@2018 Cosine Nanoelectronics Inc. All rights reserved The information provided here is believed to be accurate and reliable. Cosine Nanoelectronics assumes no reliability for inaccuracies and omissions. Specifications described and contained here are subjected to change without notice on the purpose of improving the design and performance. All of this information described herein should not be implied or granted for any third party. www.cosine-ic.com 1 COS3201 1. Pin Configuration and Functions COS3201 Pin Functions PIN No. Name Type Description 1 OUT O Output 2 GND P Ground 3 IN+ I Positive input 4 IN- I Negative input 5 Vcc P Positive power supply 2. Package and Ordering Information Model Channel COS3201 1 www.cosine-ic.com Order Number Package Package Option Marking Information COS3201TR SOT23-5 Tape and Reel, 3000 C3201 COS3201CR SC70-5 Tape and Reel, 3000 C3201 2 COS3201 3. Product Specification 3.1 Absolute Maximum Ratings (1) Parameter Power Supply: Vcc to GND Input Voltage Input Current (2) Storage Temperature Range Junction Temperature Operating Temperature Range ESD Susceptibility, HBM Rating Units 7.5 V -Vs -0.5V to +Vs + 0.5V V ±10 mA -65 to 150 °C 150 °C -40 to 125 °C 2000 V (1) Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. (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. 3.2 Thermal Data Parameter Rating Unit Package Thermal Resistance 190 (SOT23-5) °C/W Rating Unit 1.6 ~ 7 V -Vs ~ +Vs-0.5 V -40 to +85 °C 3.3 Recommended Operating Conditions Parameter DC Supply Voltage Input common-mode voltage range Operating ambient temperature www.cosine-ic.com 3 COS3201 3.4 Electrical Characteristics (VCC=5V, VCM=VCC/2, CL=15pF, TA=+25°C, unless otherwise noted) Parameter Symbol Conditions Min Typ Max Unit 1.0 5.0 mV Input Characteristics Input Offset Voltage VOS Input Offset Voltage Drift ΔVOS/ΔT Input Bias Current IB 1.0 10 pA Input Offset Current IOS 1.0 10 pA Common-Mode Voltage Range VCM VS = 5.5V 4.5 V Common-Mode Rejection Ratio CMRR VCM =0.1V to 4.5V 70 dB VOL ISINK=5mA 164 mV VOH ISOURCE=5mA 118 mV ISR Sourcing 57 mA ISK Sinking 50 mA -40 to 125°C 5 -0.1 μV/°C Output Characteristics Voltage Output Swing from Lower Rail Voltage Output Swing from Upper Rail Short-Circuit Current Power Supply Operating Voltage Range Power Supply Rejection Ratio 1.6 dB VS = +1.8V 18 μA VS = +3.3V 27 μA VS = +5.0V 28 μA tPHL VOD=100mV 200 ns tPLH VOD=100mV 200 ns Rise Time tR 20% to 80% 5 ns Fall Time tF 80% to 20% 5 ns IQ VS = +1.8V to +5.5V 70 V 90 Quiescent Current / Amplifier PSRR 7.0 Switching Characteristics Propagation Delay Time, High to Low Propagation Delay Time, Low to High www.cosine-ic.com 4 COS3201 4.0 Application Notes Inverting Comparator with Hysteresis When higher levels of hysteresis are required, positive feedback can be externally added. The inverting comparator with hysteresis requires a three-resistor network that is referenced to the comparator supply voltage (Vcc), as shown in Figure 1. When VIN at the inverting input is less than VT, the output voltage is high. The three network resistors can be represented as R1//R3 in series with R2. Equation 1 defines the high to low trip voltage (VT1) . �2∙ ��� ��1 = (�1//�3)+�2 (1) ��2 = (�2//�3)+�1 (�2//�3)∙ ��� (2) ∆VT = ��1 − ��2 (3) When VIN is greater than VA, the output voltage is low, very close to ground. In this case, the three network resistors can be presented as R2//R3 in series with R1. Equation 2 define the low to high trip voltage (VT2). The total hysteresis provided by the network is Figure 1. Inverting Configuration with Hysteresis www.cosine-ic.com 5 COS3201 Non-inverting Comparator with Hysteresis A non-inverting comparator with hysteresis requires a two-resistor network, as shown in Figure 2, and a voltage reference (VREF) at the inverting input. When VIN is low, the output is also low. For the output to switch from low to high, VIN must rise to VIN1. Equation 4 defines the low to high trip voltage (VIN1) : ���1 = (�1+�2)∙ ���� �2 (4) When VIN is high, the output is also high. For the comparator to switch back to a low state, VIN must drop to VIN2, ���2 = (�1+�2)∙ ���� − �1∙ ��� �2 (5) The hysteresis of this circuit is the difference between VIN1 and VIN2, as shown in following, ∆VIN = ��� x �1 �2 (6) Figure 2. Non-inverting Configuration with Hysteresis Square-Wave Oscillator The COS3201 can be used to build a low cost square-wave oscillator as shown in Figure 3. The square-wave period is determined by the RC time constant of the capacitor (C1) and resistor (R4). The maximum frequency is limited by propagation delay of the device and the capacitance load at the output. www.cosine-ic.com 6 COS3201 Figure 3. Square-Wave Oscillator IR Receiver A single COS3201 can be used to build a IR receiver analog front end as shown in Figure 4. R1 converts the IR light energy induced current into voltage and applies to the inverting input of the comparator. The RC network of R2 and C1 establishes a reference voltage Vref which tracks the mean amplitude of the IR signal. The RC constant of R2 and C1 is chosen for Vref to track the received IR current fluctuation but not the actual data bit stream. The non-inverting input is connected to Vref and the output over the R3 and R4 resistor network which provides hysteresis for improved guard against spurious toggles. Figure 4. IR Receiver www.cosine-ic.com 7 COS3201 Power-Supply Bypassing and Layout For single-supply operation, bypass the power supply Vcc with a 0.1μF ceramic capacitor which should be placed close to the Vcc pin. For dual-supply operation, both the positive and negative supplies should be bypassed to ground with separate 0.1μF ceramic capacitors. 2.2μF tantalum capacitor can be added for better performance. The length of the current path is directly proportional to the magnitude of parasitic inductances and thus the high frequency impedance of the path. High speed currents in an inductive ground return create an unwanted voltage noise. Broad ground plane areas will reduce the parasitic inductance. Thus a ground plane layer is important for high speed circuit design. 5. Package Information SOT23-5 (Package Outline Dimensions) www.cosine-ic.com 8