MCP6S21-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP6S21-I/SN is a single-channel, SPI-programmable gain amplifier (PGA) with a 12 MHz bandwidth and software-selectable gain settings from 1 to 32 V/V in an SOIC-8 package. It interfaces directly with microcontrollers via a 3-wire SPI bus, enabling dynamic gain adjustment without analog potentiometers. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP6S21-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.0800(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP6S21-I/SN?
- SPI-programmable gain (1 to 32 V/V) allowing software-controlled signal conditioning without mechanical trimmers
- 12 MHz bandwidth single-channel PGA supporting high-speed analog front-end designs in compact SOIC-8 package
- Single-supply operation from 2.5 V to 5.5 V with rail-to-rail output swing for maximum dynamic range
What is MCP6S21-I/SN used for?
The MCP6S21-I/SN is designed for data acquisition systems, automated test equipment, and industrial sensor interfaces that need software-adjustable amplification. Its SPI interface lets a microcontroller switch between 8 gain levels in real time — from 1x to 32x — enabling the same hardware to accommodate sensors with widely varying output ranges. The compact SOIC-8 footprint and 2.5 V to 5.5 V supply compatibility make it a natural fit for embedded measurement modules and portable instrumentation.
What are the specifications of MCP6S21-I/SN?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| YTEOL | 8 |
| Analog IC - Other Type | ANALOG CIRCUIT |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 1.35mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 4V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP6S21-I/SN datasheet?
MCP6S21-I/SN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP6S21-I/SN?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What gain settings does the MCP6S21-I/SN support and how are they selected?
The MCP6S21-I/SN supports 8 software-selectable gain levels: 1, 2, 4, 5, 8, 10, 16, and 32 V/V. Gain is set by writing a 3-byte command over the SPI bus at clock rates up to 10 MHz, allowing the host microcontroller to change amplification in microseconds without any analog component changes, which is essential for multi-range sensor acquisition systems.
For a 12-bit ADC data acquisition board, how does MCP6S21-I/SN's 12 MHz bandwidth affect signal integrity?
A 12 MHz small-signal bandwidth is more than sufficient to condition DC to audio-frequency signals (up to 100 kHz) at unity gain without introducing phase error beyond 1°. At 32x gain the effective bandwidth rolls off proportionally, typically to around 375 kHz, which still covers most industrial sensor bandwidths below 10 kHz. Paired with a 12-bit ADC sampling at 500 kSPS, the MCP6S21 introduces less than 0.1 dB gain flatness error across the target signal band.
How does MCP6S21-I/SN compare to a fixed-gain op-amp solution for a multi-range pressure sensor interface?
A fixed-gain op-amp requires physical resistor changes or a relay bank to switch ranges, adding cost and board complexity. The MCP6S21-I/SN replaces that with 8 software-settable gains from 1x to 32x selectable in under 1 µs via SPI, covering pressure sensors with full-scale outputs from 10 mV to 320 mV on the same hardware. This eliminates 4–8 discrete components and the associated calibration overhead across gain steps.
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| 25+ | $1.2500 | $31.25 |
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| 400+ | $1.0800 | $432.00 |
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