MCP3551-E/MS - 22-Bit Low-Noise Delta-Sigma ADC | Microchip
Référence : MCP3551-E/MS ✓ ActifMCP3551-E/MS Présentation
A delta-sigma ADC is a voltage regulator and signal-processing technique in which a continuously operating internal modulator oversamples the input before digital filtering and decimation. The MCP3551 belongs to the ADC, data-converter, and analog-signal-processing semiconductor hierarchy. Its low output rate and high nominal resolution favor measurements that change slowly, making it particularly useful for industrial process-control loops, bridge sensors, and precision analog instrumentation rather than high-bandwidth waveform capture.
The principal benefits of the MCP3551-E/MS include 22-bit resolution, a fully differential analog input, low output noise, a 10 ppm total unadjusted error, and an internal oscillator that avoids an external clock source. The single input supports one analog measurement channel, while the delta-sigma architecture filters high-frequency content through oversampling and digital decimation. Its 2.7 V minimum supply voltage also permits use in compact, low-power measurement systems.
The MCP3551 family combines a sigma-delta conversion stage with an internal oscillator and digital signal processing. The verified comparison data identifies the MCP3551 as a low-power, single-channel converter and lists a 2.7 V operating supply. Because the device uses a fully differential input, the source circuit must present two input nodes with the required common-mode voltage and differential range. The internal oscillator simplifies clocking but means system designers should account for converter timing when calculating effective update rates.
Typical applications include industrial pressure and temperature measurement, process-control instrumentation, sensor-interface circuits, and low-frequency precision data acquisition. The fully differential input is particularly useful when the measured quantity originates from a bridge or another balanced source, because it supports rejection of common-mode disturbance when the circuit is designed and laid out correctly. The 13.75 SPS conversion rate is suitable for supervisory measurements rather than high-speed sampling.
The primary design consideration is the analog front end. Differential input filtering, common-mode headroom, grounding, and source impedance must be evaluated together. Because exact input-voltage limits, gain settings, and recommended external component values are not present in the supplied verification data, those values should be taken directly from the Microchip datasheet and typical application circuit before layout is released.
This product record combines verified manufacturer positioning, distributor identification, package information, pricing evidence, and cross-reference findings. It also distinguishes genuine same-package drop-in options from functionally similar converters that require a different footprint, helping engineers make a PCB-compatible sourcing decision without treating broad ADC equivalence as pin compatibility.
Alternatives de remplacement direct pour MCP3551-E/MS — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MCP3551T-E/MS
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCP3551-E/SN
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MCP3551-E/MS Valeurs maximales et caractéristiques électriques
| Converter Type | 22-bit delta-sigma ADC |
| Number of Input Channels | 1 channel |
| Architecture | 1 sigma-delta |
| Analog Input Configuration | Fully differential |
| Conversion Rate | 13.75 samples/s |
| Bruit de sortie | 2.5 uVRMS |
| Total Unadjusted Error | 10 ppm |
| Minimum Supply Voltage | 2.7 V |
| Clock Source | Internal oscillator |
| Oversampling | High oversampling rate |
| Boîtier | 8-pin MSOP |
| Package Type | MSOP-8 |
| Type de montage | Surface mount |
| Digital Interface | SPI |
| Application Area | Industrial and process control |
| Power Class | Low-power ADC |
Guide de configuration des broches du MCP3551-E/MS msop-8
Configuration des broches du MCP3551-E/MS (boîtier msop-8). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour MCP3551-E/MS.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MCP3551-E/MS convient pour 6 applications: Industrial Pressure Transducer Interface, RTD Temperature Measurement, Process-Control Instrumentation, Precision Analog Sensor Acquisition, Low-Power Environmental Monitoring, Laboratory Data-Acquisition Module.
Industrial Pressure Transducer Interface
The MCP3551-E/MS fits low-speed industrial pressure monitoring because it provides a 22-bit conversion result, 2.5 uVRMS output noise, and a fully differential input. A bridge-based pressure transducer can be wired differentially so that excitation drift and common-mode disturbance contribute less directly to the measured imbalance. The converter operates from a minimum supply of 2.7 V and uses an internal oscillator, reducing the need for a separate clock circuit. Its 13.75 SPS rate is appropriate for supervisory pressure readings that change slowly rather than transient shock or vibration waveforms. Designers should verify the sensor excitation range, converter common-mode limits, input filters, and calibration routine against the manufacturer datasheet before production release.
Recommandé
RTD Temperature Measurement
The MCP3551-E/MS can support RTD temperature acquisition when the system operates at a slow update rate and requires stable, high-resolution readings. The fully differential input is valuable for rejecting common-mode voltage present across an RTD bridge, while the reported 10 ppm total unadjusted error and 2.5 uVRMS output noise support precise measurement. Its 13.75 SPS conversion rate is adequate for temperature processes that evolve gradually and is not intended for rapid thermal transients. The device does not include a programmable gain amplifier, reference, or current source according to the supplied information, so external bridge excitation, gain, linearization, and analog filtering are required.
Recommandé
Process-Control Instrumentation
MCP3551-E/MS is appropriate for process-control instrumentation that monitors a slowly varying analog variable and values precision over throughput. Its 22-bit nominal resolution and fully differential analog input support accurate acquisition from balanced sensors, while the low 2.5 uVRMS output noise helps preserve small signal detail. The internal oscillator simplifies the clocking arrangement and the 2.7 V minimum supply supports compact instrumentation. Because the conversion rate is only 13.75 SPS, this device is best used for temperature, pressure, level, or chemical-analysis variables rather than high-speed control waveforms. External anti-alias filtering and careful grounding are necessary to realize the low-noise benefit.
Recommandé
Precision Analog Sensor Acquisition
The MCP3551-E/MS can serve as the acquisition stage for a precision analog sensor whose output is slow and well resolved. Its fully differential input accepts two related signal nodes, allowing sensor excitation and return paths to be treated symmetrically, while 22-bit resolution and 2.5 uVRMS output noise support accurate capture of small differential signals. The internal oscillator reduces the digital timing burden in isolated measurement modules. The 13.75 SPS rate makes the part less suitable for vibration, waveform, or rapid event sampling. Success depends on selecting suitable excitation, gain, input impedance, and low-pass filtering so that the converter receives signals within its verified common-mode and differential-input limits.
Recommandé
Low-Power Environmental Monitoring
MCP3551-E/MS is suitable for compact environmental monitoring when the monitored quantity changes slowly and the design prioritizes low power and resolution. A differential sensor interface can reduce common-mode pickup, and the converter's internal oscillator eliminates the need for an external precision clock. The 2.7 V minimum supply is helpful for battery- or low-voltage-powered instrumentation, while the 13.75 SPS rate is well matched to periodic temperature, humidity, or gas-sensor updates. The system's power budget should include the converter, sensor excitation, reference circuitry, and digital interface because only the converter characterization is established by the supplied data. Standby behavior and conversion-energy details should be confirmed from the manufacturer datasheet.
Recommandé
Laboratory Data-Acquisition Module
MCP3551-E/MS can be used in a laboratory measurement module that prioritizes accuracy and low noise for slow analog quantities. Its fully differential input supports connection to balanced laboratory sensors or instrumentation, while the 22-bit nominal resolution and 10 ppm total unadjusted error are useful when preserving small measurement increments matters. The internal oscillator simplifies standalone acquisition hardware, and the MSOP-8 package supports compact board construction. The 13.75 SPS rate limits sampling applications, so it should be positioned as a precision measurement channel rather than a general-purpose oscilloscope-style sampler. Input protection, calibration, grounding, and filtering must be designed around the exact limits published in the manufacturer datasheet.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCP3551-E/MS — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCP3551T-E/MS | MCP3551-E/SN |
|---|---|---|---|
| Package | MSOP-8 | MSOP-8 | MSOP-8 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Converter Type | 22-bit delta-sigma ADC | MCP3551-family delta-sigma ADC | MCP3551-family delta-sigma ADC |
Principaux différenciateurs
- High nominal resolution for a slow precision converter (vs MCP3421A5T-E/CH)
- Same-family PCB-oriented sourcing option (vs MCP3551T-E/MS)
- Low-noise differential acquisition in a compact package (vs MCP3551-E/SN)
Notes de conception
Route the differential input pair as a short, tightly matched pair and place the input network close to the ADC pins. Keep the analog ground and digital return paths separated until they meet at the appropriate power and ground reference point. Because the MCP3551 is intended for low-noise measurement, long copper traces, switching-regulator nodes, and high-current return paths should be kept away from the input pins. The supplied data does not specify the recommended input filter, so component values and common-mode limits should be taken from the manufacturer application circuit.
Treat the analog input as a precision differential measurement interface rather than a general-purpose signal input. The fully differential topology can reduce common-mode error, but that benefit depends on balanced sensor connections, suitable source impedances, and proper filtering. Verify the allowable differential voltage, input common-mode range, and maximum source impedance against the current Microchip datasheet before adding gain or protection networks that may introduce imbalance or leakage.
Do not select this converter for high-bandwidth waveform capture merely because its nominal resolution is 22 bits. Its verified 13.75 samples/s rate makes it a low-frequency measurement device, and insufficient filtering can permit out-of-band energy to alias into the result. Define the signal bandwidth, apply an appropriate analog low-pass filter before the ADC, and include the filter's settling and noise behavior in the system error budget.
Calculate the analog and digital supply budgets around the 2.7 V minimum operating condition, including sensor excitation, reference circuitry, interface level shifting, and the ADC itself. The internal oscillator simplifies the clock design but does not remove the need for clean supply voltage. Place local high-frequency bypass capacitance at the supply pins and verify the recommended capacitance and permitted ESR from the manufacturer datasheet before finalizing the schematic and layout.
Informations de conformité
The supplied verified records identify the component, package, ADC architecture, and application positioning but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than being inferred.
