MCP6002-I/SN - Dual 1MHz Op Amp, RRIO, 1.8-6V | Microchip
MPN: MCP6002-I/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.4 | $0.40 |
| 10 | $0.34 | $3.40 |
| 100 | $0.24 | $24.00 |
| 500 | $0.19 | $95.00 |
| 1,000 | $0.16 | $160.00 |
| 2,500 | $0.15 | $375.00 |
MCP6002-I/SN Overview
A rail-to-rail operational amplifier is a type of analog IC whose input common-mode range and output swing extend to both supply rails, enabling full utilization of the ADC dynamic range in low-voltage single-supply systems. The MCP6002 sits within the broader product taxonomy of op amp -> amplifier IC -> analog IC -> integrated circuit -> semiconductor. Compared to non-RRIO op amps that lose 1-2V of headroom at each rail, RRIO architectures are the standard choice for battery-powered, sensor-interface, and mixed-signal designs.
Key features include a 1 MHz gain-bandwidth product, 0.6 V/microsecond slew rate, 1 pA typical input bias current, and rail-to-rail input/output that allows zero-crossover distortion-free operation near the rails. The device is unity-gain stable, supports capacitive loads up to 200 pF, and includes ESD protection diodes on the inputs. The 8-pin SOIC (SN) package provides a familiar, easy-to-prototype footprint for through-hole-style adapter boards and reflow soldering.
Architecturally, the MCP6002 uses a CMOS input stage that achieves 1 pA input bias current - several orders of magnitude lower than bipolar op amps - while the class AB output stage delivers rail-to-rail swing at moderate loads. The combination of low bias current and RRIO makes the part suitable for high-impedance sensor front-ends, photodiode transimpedance amplifiers, and unity-gain buffers driving single-supply ADCs.
Typical applications include battery-powered sensor signal conditioning, active filters for audio and instrumentation, transimpedance amplifiers for photodiodes, microcontroller analog input/output buffering, and general-purpose signal amplification in industrial, consumer, and IoT designs.
When designing with the MCP6002, observe the input common-mode range includes both rails, but for best distortion performance keep the input 0.3V away from either rail. Decouple the supply pin with a 0.1 microfarad ceramic capacitor placed within 5 mm of the VDD pin, and avoid exceeding 6.0V absolute maximum supply.
This page synthesizes distributor pricing from DigiKey, Mouser, and LCSC, drop-in SOIC-8 alternatives including same-family Microchip variants and competitor equivalents, and practical design notes not consolidated on any single manufacturer page.
Drop-in alternatives for MCP6002-I/SN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCP6002-I/P
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MCP6022-I/SN
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OPA2333AIDR
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MCP6002-I/SN Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 (dual) |
| Gain Bandwidth Product (GBWP) | 1 MHz (typical) |
| Slew Rate | 0.6 V/us (typical) |
| Supply Voltage Range | 1.8 V to 6.0 V |
| Quiescent Current per Amplifier | 100 uA (typical) |
| Input Bias Current | 1 pA (typical) |
| Phase Margin | 90 degrees (typical) |
| Input Common Mode Range | Rail-to-Rail (VSS to VDD) |
| Output Swing | Rail-to-Rail |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 8-pin SOIC (SN) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
MCP6002-I/SN Pin Configuration
| Pin 1 | OUTA — Output of amplifier A |
| Pin 2 | INA- — Inverting input of amplifier A |
| Pin 3 | INA+ — Non-inverting input of amplifier A |
| Pin 4 | VSS — Negative supply (ground) |
| Pin 5 | INB+ — Non-inverting input of amplifier B |
| Pin 6 | INB- — Inverting input of amplifier B |
| Pin 7 | OUTB — Output of amplifier B |
| Pin 8 | VDD — Positive supply |
Typical Applications
MCP6002-I/SN is suitable for 7 applications: Battery-Powered Sensor Signal Conditioning, Transimpedance Amplifier for Photodiodes, Active Filter and Audio Signal Conditioning, Microcontroller Analog Input and Output Buffering, IoT and Wearable Sensor Front-End, Industrial Control Loop Amplifier, Comparator with Hysteresis (Single-Supply).
Battery-Powered Sensor Signal Conditioning
The MCP6002-I/SN fits battery-powered sensor signal conditioning because of its 1.8V to 6.0V single-supply range covering 2x AA cells (2.4-3.0V) and single-cell Li-ion (3.0-4.2V). The 1 pA typical input bias current introduces negligible error when amplifying high-impedance sources such as thermocouples, pH probes, or piezoelectric sensors. The 100 uA per-channel quiescent current keeps total drain around 200 uA in a dual configuration. Place the device between the sensor and a 12- or 16-bit SAR ADC, with a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin. Compared to bipolar op amps like the LM358, the CMOS input stage avoids the 80 nA bias current that would otherwise load megohm-range sensor impedances. For designs where 200 uA total Iq is too high, consider the OPA2333 (17 uA/ch) but with reduced bandwidth.
Recommended
Transimpedance Amplifier for Photodiodes
The MCP6002-I/SN serves well as a photodiode transimpedance amplifier in low-light and pulse-oximetry designs. The 1 pA input bias current is roughly 1000x lower than the photocurrent of typical silicon photodiodes at room light, preventing DC error at the output. The 1 MHz GBWP supports transimpedance bandwidths in the 10-100 kHz range depending on total input capacitance (photodiode capacitance plus stray capacitance plus GBW-limiting feedback). Place a 1-10 megohm feedback resistor between output and inverting input, with a parallel compensation capacitor to limit noise peaking. Compared to the LM358, the MCP6002 avoids the bias-current-induced output offset that would otherwise require DC blocking. For higher-speed TIA above 1 MHz, choose the MCP6022 (10 MHz GBWP) or OPA2343 (12 MHz).
Recommended
Active Filter and Audio Signal Conditioning
The MCP6002-I/SN is widely used for Sallen-Key and multiple-feedback active filters up to roughly 100 kHz cutoff. The 1 MHz GBWP combined with 90-degree phase margin gives stable operation at gains of 1 through 100, and the 0.6 V/us slew rate limits distortion to roughly 0.5% THD at 10 kHz full-scale output on 5V supply. Both channels can implement a 2nd-order low-pass or bandpass filter with a few external Rs and Cs. The rail-to-rail output swing maximizes dynamic range when interfacing to 3.3V ADCs. Compared to the TL072, the MCP6002's CMOS input stage eliminates input bias current matching concerns that plague bipolar filter designs. For audio-frequency applications requiring lower noise, consider the OPA1612 or MCP6V51.
Recommended
Microcontroller Analog Input and Output Buffering
The MCP6002-I/SN buffers microcontroller ADC inputs and DAC outputs on 3.3V or 5V rails. The unity-gain-stable amplifier provides low-impedance drive to SAR ADC sample-and-hold capacitors, settling in microseconds while the 1 MHz GBWP easily handles the 8-12 bit ADC sample rates typical of PIC and ATSAM microcontrollers. The rail-to-rail input allows the amplifier to accept signals that swing to the supply rails without phase reversal - a critical feature missing in older bipolar op amps. The 100 uA per-channel quiescent current adds only 200 uA total to the system's sleep budget. Compared to leaving the microcontroller ADC input floating, the buffered configuration prevents sample-charge kickback from disturbing high-impedance sensor sources.
Recommended
IoT and Wearable Sensor Front-End
The MCP6002-I/SN fits IoT and wearable designs that need a compact dual op amp for sensor front-ends on coin-cell or Li-Po batteries. The 1.8V minimum supply allows operation directly from a single fresh alkaline cell or a depleted Li-Po near 3.0V cut-off. The 1 pA input bias current is critical for reading MEMS microphones, ECG electrodes, or skin-conductance sensors that present megohm-level source impedances. The 8-pin SOIC package measures 3.9 mm x 4.9 mm, small enough for sub-1 square inch sensor PCBs. For always-on wearable designs, an Iq-reduced part like the OPA2333 extends battery life by 5x at the cost of 65% less bandwidth.
Recommended
Industrial Control Loop Amplifier
The MCP6002-I/SN handles industrial 4-20 mA current loop receivers and 0-10V analog signal conditioning on 24V-derived 5V or 3.3V rails. The industrial -40C to +85C temperature range covers outdoor enclosures, factory floor equipment, and process control cabinets. The 1 MHz GBWP easily handles PID loop compensation networks operating below 10 kHz. The RRIO output swing lets the output drive 24-bit delta-sigma ADCs such as the MCP3421 or ADS1115 with full-scale utilization. Compared to single-supply op amps without RRIO, the MCP6002's rail-to-rail output avoids the 1-2V headroom loss that would reduce effective ADC resolution. For higher-accuracy industrial loops, consider the OPA2333 (lower offset) or MCP6V51 (auto-zero).
Recommended
Comparator with Hysteresis (Single-Supply)
Although the MCP6002-I/SN is designed as an op amp, it is commonly used as a single-supply comparator with hysteresis for threshold detection, battery voltage monitoring, and signal conditioning. The RRIO input allows zero-crossing detection without phase reversal, and the 0.6 V/us slew rate provides roughly 1 microsecond propagation at 1 mV overdrive. Add 100 kOhm - 1 MOhm positive feedback resistors for hysteresis to prevent chattering on slow-moving signals. The open-collector output is not available - a series resistor to the logic input limits inrush current. Compared to a dedicated comparator such as the TLV3201, the MCP6002 trade-off is slower propagation versus lower cost and dual-amplifier flexibility. For sub-microsecond comparator timing, use a real comparator IC.
Recommended
Recommended Products Summary
Engineering reference data for MCP6002-I/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCP6002-I/P | MCP6022-I/SN | OPA2333AIDR | TLV9062IDR | TSV912IDT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments | Texas Instruments | STMicroelectronics |
| Package | SOIC-8 (SN) | PDIP-8 (P) | SOIC-8 (SN) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 - same |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) |
| Gain Bandwidth Product | 1 MHz | 1 MHz | 10 MHz | 350 kHz | 10 MHz | 8 MHz |
| Quiescent Current per Channel | 100 uA | 100 uA | 1 mA | 17 uA | 538 uA | 820 uA |
| Supply Voltage Range | 1.8V to 6.0V | 1.8V to 6.0V | 1.8V to 6.0V | 1.8V to 5.5V | 1.8V to 5.5V | 2.5V to 5.5V |
| Input/Output Range | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.6 V/us | 0.6 V/us | 7.0 V/us | 0.16 V/us | 6.5 V/us | 4.5 V/us |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Lowest input bias current in the SOIC-8 dual RRIO class (vs LM358)
- Lower quiescent current than bipolar alternatives (vs TL072)
- Wide 1.8V minimum supply supports fresh alkaline cells (vs OPA2333AIDR)
- Highest bandwidth-to-power ratio in Microchip dual op amp family (vs MCP6001 (single-channel))
Design Notes
Decouple VDD with a 0.1 uF X7R ceramic capacitor placed within 5 mm of the VDD pin (pin 8), plus a bulk 1-10 uF tantalum or aluminum-polymer capacitor if the supply is shared with noisy digital circuitry. For dual-rail operation, decouple VSS symmetrically. The 100 uA per-channel quiescent current creates negligible supply noise, but if the same rail drives a switching regulator or MCU, place a ferrite bead or pi-filter between the analog and digital supply domains to prevent digital noise coupling into the input pins via the supply.
For SOIC-8 layouts, keep input traces short and guarded. Place the inverting-input feedback resistor directly between pins 2 and 1 (or 5 and 7) using a kelvin connection that does not share trace segments with high-current outputs. Keep the 0.1 uF decoupling capacitor's ground via adjacent to the VSS pin's via to minimize parasitic inductance. For photodiode TIA applications, completely shield the inverting input trace with a ground guard ring to prevent leakage currents - the 1 pA bias current of the MCP6002 is sensitive to board contamination under high-impedance conditions.
Three common MCP6002 pitfalls: (1) Do not exceed 6.0V on VDD - the absolute-maximum rating is 6.5V with 6.0V as the recommended maximum, and exceeding this destroys the part. (2) For lowest distortion keep both inputs 0.3V away from either rail - although RRIO is supported, input overdrive near the rails increases crossover-region distortion. (3) Do not load the output with more than 200 pF without a series-isolation resistor of 50-100 ohm - the unity-gain buffer is stable but can oscillate with extreme capacitive loads. Estimated: typical output short-circuit current is 25 mA per channel, so an output short to ground is within the safe operating area.
Compliance Information
RoHS compliant per Microchip product page and DigiKey listing. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - see MCP6002 automotive VAO variants for qualified equivalents.
