MCP6S28-I/SL - 8-Ch 12 MHz SPI Programmable Gain Amplifier | Microchip
Teilenummer: MCP6S28-I/SL ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.66 | $2,66 |
| 10 | $2.4 | $24,00 |
| 100 | $2.1 | $210,00 |
| 500 | $1.82 | $910,00 |
| 1.000 | $1.65 | $1.650,00 |
MCP6S28-I/SL Übersicht
A Programmable Gain Amplifier (PGA) is an analog integrated circuit that combines an input multiplexer, a variable-gain voltage amplifier, and a digital control interface in one package. PGAs sit at the front end of data-acquisition signal chains, between sensors or transducers and an analog-to-digital converter, performing both channel selection (replacing mechanical or analog switches) and gain setting (replacing precision resistor networks) entirely under firmware control. The PGA category belongs to the broader family of special-purpose amplifiers and signal-conditioning ICs, sitting alongside instrumentation amplifiers and variable-gain amplifiers in modern mixed-signal designs.
The MCP6S28-I/SL provides ±1% maximum gain error, ±275 µV maximum input offset voltage, 10 nV/√Hz input voltage noise density, and rail-to-rail input and output swing on a 2.5 V to 5.5 V single supply. The 12 MHz gain-bandwidth product comfortably supports audio-bandwidth and fast instrumentation signals, while the SPI port enables reconfigurable channel and gain selection in real time. Its low-power CMOS design keeps quiescent current minimal, which is valuable for battery-powered and portable designs where energy budgets are tight.
Internally, the device uses a CMOS operational architecture with switched-capacitor gain stages and an 8-to-1 input analog multiplexer. The serial peripheral interface writes gain and channel registers at clock rates up to 10 MHz, allowing rapid reconfiguration between acquisitions. The rail-to-rail input stage accepts signals near either supply rail, which is particularly useful in single-supply 3.3 V or 5 V systems where sensor outputs may swing close to ground.
Typical applications include industrial process-control signal chains, multi-channel sensor signal conditioning for data-acquisition systems, audio mixer front-ends, programmable gain stages in test and measurement equipment, and embedded data-acquisition front-ends paired with PIC or dsPIC microcontrollers. The SPI control makes it ideal for systems that need to dynamically re-route or re-scale multiple analog inputs under firmware management. Engineers commonly pair this PGA with a successive-approximation ADC or a microcontroller's internal ADC to build software-reconfigurable analog front ends.
When designing with this device, allocate a chip-select line for the SPI bus and provide a clean 2.5 V to 5.5 V analog supply with 0.1 µF decoupling placed close to the IC. Choose the gain to keep the input signal within the ±275 µV offset error budget and prevent output saturation at the rail. Avoid driving large capacitive loads directly on the output without a series resistor to control AC overshoot.
This page synthesizes distributor pricing, drop-in SOIC-16 alternatives, and practical design notes that complement the Microchip datasheet and help engineers select the right PGA for their multi-channel analog front end.
Drop-in-Alternativen für MCP6S28-I/SL – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MCP6S28T-I/SL
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MCP6S28-I/SL Grenzwerte & elektrische Eigenschaften
| Manufacturer | Microchip Technology |
| Part Family | MCP6S2x SPI-Programmable Gain Amplifier |
| Amplifier Type | Programmable Gain Amplifier (PGA) with input multiplexer |
| Number of Channels | 8 (single-ended) |
| Input Multiplexer | 8-to-1 analog input MUX |
| Gain Steps | 8 (G = +1, +2, +4, +5, +8, +10, +16, +32 V/V) |
| Gain Error (max) | ±1% (typical ±0.5%) |
| Gain-Bandwidth Product | 12 MHz (typ) |
| Input Offset Voltage (max) | ±275 µV |
| Input Voltage Noise Density | 10 nV/√Hz (typ at 10 kHz) |
| Supply Voltage Range | 2.5 V to 5.5 V single supply |
| Input Swing | Rail-to-rail |
| Output Swing | Rail-to-rail |
| Digital Interface | SPI (up to 10 MHz clock) |
| Betriebstemperaturbereich | -40 °C to +85 °C (industrial) |
| Gehäuse | 16-pin SOIC (SL), 3.90 mm body width |
| Montageart | Surface Mount |
| MSL-Level | 1 (per JEDEC J-STD-020) |
| RoHS-Status | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| AEC-Q100 Qualification | Not qualified (industrial grade) |
MCP6S28-I/SL Pin-Konfiguration
| Pin 1 | CH0 — Analog input channel 0 |
| Pin 2 | CH1 — Analog input channel 1 |
| Pin 3 | CH2 — Analog input channel 2 |
| Pin 4 | CH3 — Analog input channel 3 |
| Pin 5 | CH4 — Analog input channel 4 |
| Pin 6 | CH5 — Analog input channel 5 |
| Pin 7 | CH6 — Analog input channel 6 |
| Pin 8 | CH7 — Analog input channel 7 |
| Pin 9 | VSS — Negative supply (ground) |
| Pin 10 | VOUT — Amplifier output |
| Pin 11 | VDD — Positive supply (2.5 V to 5.5 V) |
| Pin 12 | CS — SPI chip select (active low) |
| Pin 13 | SCK — SPI serial clock input |
| Pin 14 | SDI — SPI serial data input |
| Pin 15 | SDO — SPI serial data output |
| Pin 16 | NC — Not connected (per datasheet) |
Typische Anwendungen
MCP6S28-I/SL ist geeignet für 7 Anwendungs: Multi-Channel Industrial Data-Acquisition Front End, Programmable Audio Mixer Pre-Amp Stage, Test and Measurement Equipment Input Stage, Battery-Powered Portable Sensor Hub, Embedded Process-Control Analog Front End, Medical Signal Conditioning Front End, Automotive Sensor Interface Module.
Multi-Channel Industrial Data-Acquisition Front End
The MCP6S28-I/SL is an ideal front end for multi-channel industrial data-acquisition systems where multiple sensors (thermocouples, RTDs, strain gauges, 4-20 mA loops) must be conditioned and routed to a single ADC. Its 8-to-1 input multiplexer replaces mechanical relays or analog switch ICs, while the eight software-selectable gain steps (+1 to +32 V/V) eliminate the precision resistor networks normally required for sensor scaling. With 12 MHz gain-bandwidth product and 10 nV/√Hz input noise density, the device preserves signal fidelity for 16-bit and lower ADCs, and the SPI interface up to 10 MHz allows a dsPIC or PIC32 host to reconfigure channels and gain between conversions with minimal latency.
Empfohlen
Programmable Audio Mixer Pre-Amp Stage
The MCP6S28-I/SL fits audio mixer and pre-amplifier front ends where multiple line-level sources must be selected and gain-adjusted in software under DSP or microcontroller control. Its rail-to-rail input stage accepts signals up to the supply rails (typically 5 V), and the rail-to-rail output drives downstream ADC or codec inputs cleanly across the audio band. The 12 MHz gain-bandwidth product and 10 nV/√Hz input voltage noise density keep harmonic distortion and noise floor low for 16-bit audio paths, while the SPI gain control lets the host implement automated mixing, channel-routing presets, and mute functions in firmware without mechanical potentiometers.
Empfohlen
Test and Measurement Equipment Input Stage
Bench-top multimeters, oscilloscope front panels, and programmable signal conditioners benefit from the MCP6S28-I/SL's combination of 8 input channels and software-controlled gain. The ±1% gain accuracy and ±275 µV input offset voltage support 12-bit to 14-bit measurement resolution without external calibration networks. The rail-to-rail input/output stages maximize dynamic range on a single 5 V supply, while the SPI bus enables SCPI-style remote commands ("INPUT 3; GAIN 16") to be implemented with minimal firmware overhead. The industrial -40 °C to +85 °C temperature range ensures stable readings across lab and field environments.
Empfohlen
Battery-Powered Portable Sensor Hub
The MCP6S28-I/SL suits battery-powered portable sensor hubs (handheld environmental monitors, multi-gas detectors, wearable medical patches) where multiple low-level analog sensors must be conditioned and digitized while drawing minimal current. Its CMOS architecture and 2.5 V to 5.5 V single-supply operation allow direct connection to a single Li-ion cell or 3.3 V regulator rail without charge-pump complexity. The rail-to-rail input stage accepts sensor outputs that swing close to ground, which is critical for single-supply 3.3 V systems. SPI-controlled gain lets the firmware reduce power by selecting lower gain when signals are strong and increase gain only for weak sensors, extending battery life.
Empfohlen
Embedded Process-Control Analog Front End
In embedded process-control systems (PLC analog modules, distributed I/O nodes, SCADA remote terminals), the MCP6S28-I/SL provides the variable-gain analog front end needed to accommodate a wide range of input signal amplitudes from field sensors. With 8 channels, 8 gain steps, and SPI control, a single device replaces a multiplexer, several op-amps, and a precision resistor network. The SOIC-16 footprint saves board space in compact DIN-rail modules, and the industrial temperature range ensures operation in factory environments. The host PLC or microcontroller can reconfigure gain and channel selection on the fly based on control logic or operator commands.
Empfohlen
Medical Signal Conditioning Front End
The MCP6S28-I/SL is suitable for medical instrumentation front ends such as multi-lead ECG, EMG, or pulse-oximeter modules where multiple low-amplitude biosignals must be amplified and digitized. The 10 nV/√Hz input voltage noise density and ±275 µV input offset voltage preserve small biopotential signals, while the rail-to-rail input stage accepts electrode offsets that can swing to either supply rail. The 12 MHz gain-bandwidth product supports ECG bandwidth (typically 0.05 Hz to 150 Hz) with substantial margin, and the SPI gain control lets the firmware apply per-lead gain adjustment in software without manual trimming. Note: medical applications typically require additional isolation, IEC 60601 compliance verification, and FDA/regulatory review.
Empfohlen
Automotive Sensor Interface Module
While the MCP6S28-I/SL itself is industrial-grade (not AEC-Q100 qualified), it is suitable for non-safety automotive subsystems such as body-control modules, infotainment audio inputs, and HVAC sensor interfaces where multiple analog inputs (temperature, humidity, position potentiometers) must be selected and scaled. The 8 input channels accommodate typical sensor counts without additional muxes, and the 8 software-selectable gain steps handle the wide dynamic range of automotive sensor outputs. For AEC-Q100 qualified designs, Microchip's automotive-grade counterparts in the same family should be substituted, but for hobbyist, aftermarket, or non-safety automotive applications, the MCP6S28-I/SL provides a compact, low-cost solution.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MCP6S28-I/SL – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MCP6S28T-I/SL | MCP6S28-I/P | MCP6S26-I/SL | MCP6S22-I/SN |
|---|---|---|---|---|---|
| Package | SOIC-16 (SL) | SOIC-16 (SL) - same | DIP-16 - different | SOIC-14 - different | SOIC-8 - different |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Number of Channels | 8 | 8 - same | 8 - same | 6 - reduced | 2 - reduced |
| Gain Steps | 8 (+1 to +32 V/V) | 8 (+1 to +32 V/V) - same | 8 (+1 to +32 V/V) - same | 8 (+1 to +32 V/V) - same | 8 (+1 to +32 V/V) - same |
| Gain-Bandwidth Product | 12 MHz | 12 MHz - same | 12 MHz - same | 12 MHz - same | 12 MHz - same |
| Input Offset Voltage (max) | ±275 µV | ±275 µV - same | ±275 µV - same | ±275 µV - same | ±275 µV - same |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same |
| Operating Temperature Range | -40 °C to +85 °C (industrial) | -40 °C to +85 °C - same | -40 °C to +85 °C - same | -40 °C to +85 °C - same | -40 °C to +85 °C - same |
| Pin-to-Pin Compatible with MCP6S28-I/SL | N/A (reference) | Yes - true drop-in (same SOIC-16, identical silicon) | No - DIP-16 package, different PCB footprint | No - SOIC-14 package, 6 channels (not 8) | No - SOIC-8 package, 2 channels (not 8) |
Wichtigste Unterscheidungsmerkmale
- Only Microchip PGA with 8 channels + SPI + 8 gain steps in SOIC-16 (vs. MCP6S26-I/SL (6 channels))
- True drop-in tape-and-reel variant available (vs. MCP6S28T-I/SL)
- Rail-to-rail input and output swing on a single 2.5 V to 5.5 V supply (vs. MCP6S22-I/SN (2-channel variant))
Designhinweise
Power the MCP6S28-I/SL from a clean 2.5 V to 5.5 V analog supply. Place a 0.1 µF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 11) and a 10 µF bulk capacitor nearby for low-frequency noise rejection. If the analog supply is shared with a switching regulator, add a ferrite bead or LC filter between the switching node and VDD to prevent switching noise from coupling into the PGA's input stage, which would degrade the 10 nV/√Hz noise floor.
Route the eight analog inputs (CH0-CH7) as parallel, length-matched traces with a ground guard trace between adjacent channels to minimize crosstalk. Keep digital SPI traces (CS, SCK, SDI, SDO) away from the analog inputs and the output trace, or run them on the opposite PCB layer with a continuous ground plane between layers. Place the PGA close to the host microcontroller to keep SPI traces short and avoid reflections on the SCK line above 5 MHz clock rates.
Avoid driving large capacitive loads (>100 pF) directly on the VOUT pin (pin 10) without a series isolation resistor (typically 50-100 Ω), as the output stage can exhibit AC overshoot and ringing with capacitive loads. Also, the input offset voltage of ±275 µV can introduce systematic error at low gains - for high-precision measurement, calibrate the gain error in firmware by measuring a known reference and applying a per-channel correction factor. The NC pin (pin 16) must be left floating per the manufacturer datasheet.
Compliance-Informationen
RoHS and REACH compliant per Microchip product page. Lead-free and halogen-free per Microchip environmental certification. Not AEC-Q100 qualified; choose an automotive-grade variant for AEC-Q100 applications. Conflict-minerals declaration compliant per Microchip policy.
