MCP6241/1R/1U/2/4 50 µA, 550 kHz Rail-to-Rail Op Amp Features Description • • • • • • The Microchip Technology Inc. MCP6241/1R/1U/2/4 operational amplifiers (op amps) provide wide bandwidth for the quiescent current. The MCP6241/1R/ 1U/2/4 has a 550 kHz gain bandwidth product and 68° (typical) phase margin. This family operates from a single supply voltage as low as 1.8V, while drawing 50 µA (typical) quiescent current.
MCP6241/1R/1U/2/4 NOTES: DS21882D-page 2 © 2008 Microchip Technology Inc.
MCP6241/1R/1U/2/4 1.0 ELECTRICAL CHARACTERISTICS VDD – VSS ........................................................................7.0V † Notice: Stresses above 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 those or any other conditions above those indicated in the operational listings of this specification is not implied.
MCP6241/1R/1U/2/4 AC ELECTRICAL CHARACTERISTICS Electrical Characteristics: Unless otherwise indicated, TA = +25°C, VDD = +1.8 to 5.5V, VSS = GND, VCM = VDD/2, VOUT ≈ VDD/2, RL = 10 kΩ to VDD/2 and CL = 60 pF. Parameters Sym Min Typ Max Units Conditions GBWP — 550 — kHz Phase Margin PM — 68 — ° Slew Rate SR — 0.30 — V/µs Input Noise Voltage Eni — 10 — µVP-P Input Noise Voltage Density eni — 45 — nV/√Hz f = 1 kHz Input Noise Current Density ini — 0.
MCP6241/1R/1U/2/4 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.
MCP6241/1R/1U/2/4 FIGURE 2-7: vs. Frequency. Input Noise Voltage Density FIGURE 2-10: VDD = 1.8V 200 100 0 TA = -40°C TA = +25°C TA = +85°C TA = +125°C -100 -200 500 450 400 100 TA = -40°C TA = +25°C TA = +85°C TA = +125°C -100 Common Mode Input Voltage (V) FIGURE 2-9: Input Offset Voltage vs. Common Mode Input Voltage at VDD = 5.5V. 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 -200 DS21882D-page 6 12 10 8 6 4 VDD = 5.5V VDD = 1.8V 350 0.0 0.5 1.0 1.5 2.0 2.
MCP6241/1R/1U/2/4 Note: Unless otherwise indicated, TA = +25°C, VDD = +1.8V to +5.5V, VSS = GND, VCM = VDD/2, VOUT ≈ VDD/2, RL = 100 kΩ to VDD/2 and CL = 60 pF. 0.50 Slew Rate (V/µs) 0.40 Falling Edge 0.35 0.30 0.25 0.20 VDD = 1.8V 0.15 Rising Edge 0.10 -50 -25 FIGURE 2-13: Temperature. 0 25 50 75 100 Ambient Temperature (°C) 125 Time (1 µs/div) Slew Rate vs. Ambient FIGURE 2-16: Pulse Response. VDD – VOH VOL – VSS 10 1 10µ 1.E-02 3.5 3.0 2.5 2.0 1.5 1.0 100µ 1m 1.E-01 1.
MCP6241/1R/1U/2/4 Note: Unless otherwise indicated, TA = +25°C, VDD = +1.8V to +5.5V, VSS = GND, VCM = VDD/2, VOUT ≈ VDD/2, RL = 100 kΩ to VDD/2 and CL = 60 pF. Input Current Magnitude (A) 1.E-02 10m 1.E-03 1m 1.E-04 100µ 1.E-05 10µ 1.E-06 1µ 100n 1.E-07 10n 1.E-08 1n 1.E-09 100p 1.E-10 10p 1.E-11 1p 1.E-12 +125°C +85°C +25°C -40°C -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 Input Voltage (V) FIGURE 2-19: Measured Input Current vs. Input Voltage (below VSS).
MCP6241/1R/1U/2/4 3.0 PIN DESCRIPTIONS Descriptions of the pins are listed in Table 3-1 (single op amps) and Table 3-2 (dual and quad op amps).
MCP6241/1R/1U/2/4 NOTES: DS21882D-page 10 © 2008 Microchip Technology Inc.
MCP6241/1R/1U/2/4 4.0 APPLICATION INFORMATION The MCP6241/1R/1U/2/4 family of op amps is manufactured using Microchip’s state-of-the-art CMOS process and is specifically designed for low-power and general-purpose applications. The low supply voltage, low quiescent current and wide bandwidth makes the MCP6241/1R/1U/2/4 ideal for battery-powered applications. 4.1 Rail-to-Rail Inputs 4.1.1 The MCP6241/1R/1U/2/4 op amp is designed to prevent phase reversal when the input pins exceed the supply voltages.
MCP6241/1R/1U/2/4 4.1.3 NORMAL OPERATION 1.E+03 1k The input stage of the MCP6241/1R/1U/2/4 op amps use two differential CMOS input stages in parallel. One operates at low common mode input voltage (VCM), while the other operates at high VCM. WIth this topology, the device operates with VCM up to 0.3V above VDD and 0.3V below VSS. 4.2 Capacitive Loads Driving large capacitive loads can cause stability problems for voltage-feedback op amps.
MCP6241/1R/1U/2/4 4.6 PCB Surface Leakage 4.7 In applications where low input bias current is critical, PCB (printed circuit board) surface leakage effects need to be considered. Surface leakage is caused by humidity, dust or other contamination on the board. Under low humidity conditions, a typical resistance between nearby traces is 1012Ω. A 5V difference would cause 5 pA of current to flow, which is greater than the MCP6241/1R/1U/2/4 family’s bias current at 25°C (1 pA, typical).
MCP6241/1R/1U/2/4 4.7.2 COMPENSATING FOR THE PARASITIC CAPACITANCE In analog circuit design, the PCB parasitic capacitance can compromise the circuit behavior; Figure 4-9 shows a typical scenario. If the input of an amplifier sees parasitic capacitance of several picofarad (CPARA, which includes the common mode capacitance of 6 pF, typical) and large RF and RG , the frequency response of the circuit will include a zero. This parasitic zero introduces gain peaking and can cause circuit instability.
MCP6241/1R/1U/2/4 5.0 DESIGN AIDS Microchip provides the basic design tools needed for the MCP6241/1R/1U/2/4 family of op amps. 5.1 SPICE Macro Model The latest SPICE macro model for the MCP6241/1R/ 1U/2/4 op amps is available on the Microchip web site at www.microchip.com. This model is intended to be an initial design tool that works well in the op amp’s linear region of operation over the temperature range. See the model file for information on its capabilities.
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MCP6241/1R/1U/2/4 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 5-Lead SC-70 (MCP6241U Only) Example: XXNN AT25 5-Lead SOT-23 (MCP6241, MCP6241R, MCP6241U) 5 4 XXNN 1 2 3 Device Code MCP6241 BQNN MCP6241R BRNN MCP6241U BSNN Note: Example: 5 4 BQ25 Applies to 5-Lead SOT-23. 8-Lead DFN (2x3) (MCP6241 Only) 1 2 3 Example: XXX YWW NN AER 834 25 Example: 8-Lead MSOP XXXXXX 6242E YWWNNN 834256 8-Lead PDIP (300 mil) XXXXXXXX XXXXXNNN YYWW Legend: XX...
MCP6241/1R/1U/2/4 Package Marking Information (Continued) 8-Lead SOIC (150 mil) XXXXXXXX XXXXYYWW NNN 14-Lead PDIP (300 mil) (MCP6244) Example: MCP6242 E/SN0818 256 OR Example: MCP6244 e3 E/P^^ 0546256 XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN 14-Lead SOIC (150 mil) (MCP6244) MCP6242E e3 0834 SN^^ 256 Example: MCP6244 e3 E/SL^^ 0546256 XXXXXXXXXX XXXXXXXXXX YYWWNNN 14-Lead TSSOP (MCP6244) Example: XXXXXXXX YYWW 6244E 0546 NNN 256 DS21882D-page 18 © 2008 Microchip Technology Inc.
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MCP6241/1R/1U/2/4 NOTES: DS21882D-page 32 © 2008 Microchip Technology Inc.
MCP6241/1R/1U/2/4 APPENDIX A: REVISION HISTORY Revision D (October 2008) The following is the list of modifications: 1. Changed Heading “Available Tools” to “Design Aids”. 2. Design Aids: Name change for Mindi Simulator Tool. 3. Package Types: Added DFN to MCP6231 Device. 4. Absolute Maximum Ratings: Numerous changes in this section. 5. Updated notes to Section 1.0 “Electrical Characteristics”. 6. Added Figure 2-19. 7. Numerous changes to Section 3.0 “Pin Descriptions”. 8. Added Section 4.1.
MCP6241/1R/1U/2/4 NOTES: DS21882D-page 34 © 2008 Microchip Technology Inc.
MCP6241/1R/1U/2/4 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.
MCP6241/1R/1U/2/4 NOTES: DS21882D-page 36 © 2008 Microchip Technology Inc.
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.
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