Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOT 23 5

MCP6286

Features

• Low Noise: 5.4 nV/√Hz (typical)

• Low Quiescent Current: 520 µA (typical)

• Rail-to-Rail Output

• Wide Supply Voltage Range: 2.2V to 5.5V

• Gain Bandwidth Product: 3.5 MHz (typical)

• Unity Gain Stable

• Extended Temperature Range: -40°C to +125°C

• No Phase Reversal

• Small Package

Applications

• Noise Cancellation Headphones

• Cellular Phones

• Analog Filters

• Sensor Conditioning

• Portable Instrumentation

• Medical Instrumentation

• Battery Powered Systems

Design Aids

• SPICE Macro Models

• FilterLab

Software

• Mindi

™

Circuit Designer & Simulator

• MAPS (Microchip Advanced Part Selector)

• Analog Demonstration and Evaluation Boards

• Application Notes

Typical Application

Description

The Microchip Technology Inc. MCP6286 operational

amplifier (op amp) has low noise (5.4 nV/√Hz, typical),

low power (520 µA, typical) and rail-to-rail output

operation. It is unity gain stable and has a gain

bandwidth product of 3.5 MHz (typical). This device

operates with a single supply voltage as low as 2.2V,

while drawing low quiescent current. These features

make the product well suited for single-supply, low

noise, battery-powered applications.

The MCP6286 op amp is offered in a space saving

SOT-23-5 package. It is designed with Microchip’s

advanced CMOS process and available in the

extended temperature range, with a power supply

range of 2.2V to 5.5V.

Package Types

OUT

47 nF

382 kΩ

641 kΩ

22 nF

G = +1 V/V

= 10 Hz

–

MCP6286

Second-Order, Low-Pass Butterworth Filter

IN–

IN+

OUT

MCP6286

SOT-23-5

Low Noise, Low Power Op Amp

Summary of content (28 pages)

PAGE 1
MCP6286 Low Noise, Low Power Op Amp Features Description • • • • • • • • • The Microchip Technology Inc. MCP6286 operational amplifier (op amp) has low noise (5.4 nV/√Hz, typical), low power (520 µA, typical) and rail-to-rail output operation. It is unity gain stable and has a gain bandwidth product of 3.5 MHz (typical). This device operates with a single supply voltage as low as 2.2V, while drawing low quiescent current.
PAGE 3
MCP6286 1.0 ELECTRICAL CHARACTERISTICS 1.1 Absolute Maximum Ratings † VDD – VSS ........................................................................7.0V Current at Input Pins .....................................................±2 mA Analog Inputs (VIN+, VIN-)†† .......... VSS – 1.0V to VDD + 1.0V All Other Inputs and Outputs ......... VSS – 0.3V to VDD + 0.3V Difference Input Voltage ...................................... |VDD – VSS| Output Short-Circuit Current .................................
PAGE 4
MCP6286 DC ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: Unless otherwise indicated, VDD = +2.2V to +5.5V, VSS= GND, TA= +25°C, VCM = VDD/3, VOUT ≈ VDD/2, VL = VDD/2 and RL = 10 kΩ to VL. (Refer to Figure 1-1). Parameters Sym Min Typ Max Units Conditions VDD 2.2 — 5.5 V IQ 300 520 700 µA IO = 0, VDD = 2.2V 320 540 720 µA IO = 0, VDD = 5.5V Power Supply Supply Voltage Quiescent Current per Amplifier Note 1: Figure 2-12 shows how VCMR changes across temperature.
PAGE 5
MCP6286 1.2 Test Circuits The circuit used for most DC and AC tests is shown in Figure 1-1. It independently sets VCM and VOUT; see Equation 1-1. The circuit’s common mode voltage is (VP + VM)/2, not VCM. VOST includes VOS plus the effects of temperature, CMRR, PSRR and AOL. EQUATION 1-1: G DM = R F ⁄ R G CF 6.8 pF RG 100 kΩ V OST = V IN– – V IN+ VOST = Op Amp’s Total Input Offset Voltage © 2009 Microchip Technology Inc.
PAGE 7
MCP6286 2.0 TYPICAL PERFORMANCE CURVES Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
PAGE 8
MCP6286 Note: Unless otherwise indicated, TA = +25°C, VDD = +2.2V to +5.5V, VSS = GND, VCM = VDD/3, VOUT ≈ VDD/2, VL = VDD/2, RL = 10 kΩ to VL and CL = 60 pF. VCM = VCMR-H 400 Representative Part CMRR, PSRR (dB) Input Offset Voltage (µV) 600 200 0 -200 TA = +125°C TA = +85°C TA = +25°C TA = -40°C -400 -600 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Power Supply Voltage (V) 5.5 120 110 100 90 80 70 60 50 40 30 20 100 1k 10k 100000 100k 1E+06 1M 100 1000 10000 Frequency (Hz) CMRR, PSRR vs.
PAGE 9
MCP6286 700 10000 Quiescent Current (uA) VDD = 5.5V 1000 Input Bias Current 10 100 -150 0 VDD = 5.5V 500 VDD = 2.2V 400 350 300 250 -25 0 25 50 75 Ambient Temperature (°C) 100 FIGURE 2-15: Quiescent Current vs Ambient Temperature. © 2009 Microchip Technology Inc. 1 1.0E+01 10 125 6.0 -210 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 1.0E+07 100 1k 10k 100k 1M 10M Frequency (Hz) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Open-Loop Gain, Phase vs.
PAGE 10
MCP6286 VDD = 5.5V -50 -25 0 25 50 75 100 Ambient Temperature (°C) 90 85 80 75 70 65 60 55 50 45 40 125 3.0 2.5 0.5 0.0 80 75 70 65 2.0 1.5 1.0 Phase Margin VDD = 2.2V -50 -25 0 25 50 75 100 Ambient Temperature (°C) 60 55 50 45 40 125 FIGURE 2-21: Gain Bandwidth Product, Phase Margin vs. Ambient Temperature with VDD = 2.2V. DS22196A-page 10 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 VDD = 5.5V VDD = 2.2V 1 100 100 1k 1000 FIGURE 2-23: Frequency.
PAGE 11
MCP6286 60 55 50 45 40 35 30 25 20 15 10 5 0 Output Voltage (50 mV/div) Output Voltage Headroom VDD - VOH, VOL - VSS (mV) Note: Unless otherwise indicated, TA = +25°C, VDD = +2.2V to +5.5V, VSS = GND, VCM = VDD/3, VOUT ≈ VDD/2, VL = VDD/2, RL = 10 kΩ to VL and CL = 60 pF. VDD - VOH @ RL = 2kΩ VOL - VSS @ RL = 2kΩ VDD - VOH @ RL = 10kΩ VOL - VSS @ RL = 10kΩ -50 -25 0 25 50 75 100 Ambient Temperature (°C) 125 FIGURE 2-25: Output Voltage Headroom vs. Ambient Temperature.
PAGE 12
MCP6286 Note: Unless otherwise indicated, TA = +25°C, VDD = +1.8V to +6.0V, VSS = GND, VCM = VDD/3, VOUT ≈ VDD/2, VL = VDD/2, RL = 10 kΩ to VL and CL = 60 pF. 1m 1m 1m 1000000000 5.0 100 µ 100000000 100 100 µµ 10000000 10µ 10µ 10µ 1µ 1000000 1µ 1µ VOUT 4.0 VIN -I IN (A) Input, Output Voltages (V) 6.0 3.0 100000 100n 100n 10000 10n 10n 1000 1n 1n 100 100p 100p 2.0 1.0 VDD = 5.5V G = +2 V/V 0.0 10p 10p10 1p1 1p -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 -1.
PAGE 13
MCP6286 3.0 PIN DESCRIPTIONS Descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE MCP6286 SOT-23-5 3.1 Symbol 1 VOUT 2 VSS 3 VIN+ Non-inverting Input 4 VIN– Inverting Input 5 VDD Positive Power Supply Analog Output The output pin is low-impedance voltage source. 3.2 Description Analog Inputs The non-inverting and inverting inputs are high-impedance CMOS inputs with low bias currents. © 2009 Microchip Technology Inc.
PAGE 15
MCP6286 4.0 APPLICATION INFORMATION VDD The MCP6286 op amp is manufactured using Microchip’s state-of-the-art CMOS process and is specifically designed for low-power, low-noise applications. 4.1 D1 R1 Input 4.1.1 MCP6286 V2 PHASE REVERSAL R2 The MCP6286 op amp is designed to prevent phase reversal when the input pins exceed the supply voltages. Figure 2-31 shows the input voltage exceeding the supply voltage without any phase reversal. 4.1.
PAGE 16
MCP6286 4.3 Capacitive Loads 4.4 Driving large capacitive loads can cause stability problems for voltage feedback op amps. As the load capacitance increases, the feedback loop’s phase margin decreases and the closed-loop bandwidth is reduced. This produces gain peaking in the frequency response, with overshoot and ringing in the step response. While a unity-gain buffer (G = +1 V/V) is the most sensitive to capacitive loads, all gains show the same general behavior.
PAGE 17
MCP6286 4.6 4.6.1 Application Circuits 4.6.2 ACTIVE LOW-PASS FILTER The MCP6286 op amp’s low input bias current makes it possible for the designer to use larger resistors and smaller capacitors for active low-pass filter applications. However, as the resistance increases, the noise generated also increases. Parasitic capacitances and the large value resistors could also modify the frequency response. These trade-offs need to be considered when selecting circuit elements.
PAGE 19
MCP6286 5.0 DESIGN AIDS Microchip provides the basic design tools needed for the MCP6286 op amp. 5.1 SPICE Macro Model The latest SPICE macro model for the MCP6286 op amp is available on the Microchip web site at www.microchip.com. The model was written and tested in official Orcad (Cadence) owned PSPICE. For the other simulators, it may require translation. The model covers a wide aspect of the op amp's electrical specifications.
PAGE 21
MCP6286 6.0 PACKAGING INFORMATION 6.1 Package Marking Information Example: 5-Lead SOT-23 5 4 5 WENN XXNN 1 2 3 Legend: XX...X Y YY WW NNN e3 * Note: 4 1 2 3 Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free.
PAGE 22
MCP6286 .
PAGE 23
MCP6286 APPENDIX A: REVISION HISTORY Revision A (August 2009) • Original Release of this Document. © 2009 Microchip Technology Inc.
PAGE 25
MCP6286 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. X /XX Device Temperature Range Package Device: MCP6286T: Temperature Range: E Package: OT = Plastic Small Outline Transistor, 5-lead Examples: a) MCP6286T-E/OT: Tape and Reel, 5-LD SOT-23 package Single Op Amp (Tape and Reel) = -40°C to +125°C © 2009 Microchip Technology Inc.
PAGE 27
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 28
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