MCP3304-CI/SL - 13-Bit 4-Channel SAR ADC | Microchip
Référence : MCP3304-CI/SL ✓ ActifMCP3304-CI/SL Présentation
An ADC is a data-acquisition IC that converts an analog voltage into a digital number for processing, display, logging, or control. The MCP3304 belongs to the SAR ADC family, which uses a successive-approximation conversion process and provides a practical balance between resolution, throughput, power consumption, and cost. Its differential inputs reject common-mode noise and support direct measurement of bipolar or ratiometric sensor signals.
Key features include 13-bit resolution, 100 ksps sampling performance, four differential or eight single-ended input configurations, and low power consumption. The digital interface uses the industry-standard SPI protocol, allowing the converter to connect to microcontrollers, field-programmable gate arrays, and data loggers. Differential operation also supports the manufacturer's ±1 LSB maximum DNL specification and grade-dependent INL characteristics.
The MCP3304 uses an internal sample-and-hold stage and a 13-bit successive-approximation core. Differential and single-ended multiplexing allows one converter to service several sensors, reducing component count in multi-channel systems. Low-power operation suits portable instruments where battery capacity and thermal performance are important.
Typical applications include battery-powered environmental monitors, industrial process-control nodes, thermocouple and pressure-sensor interfaces, laboratory measurement equipment, and remote data-acquisition systems. The SPI interface simplifies connection to an embedded controller while the 16-lead SOIC package supports conventional surface-mount assembly.
When laying out the circuit, place the input and reference components close to the converter, use a low-noise reference source, and route analog and digital return currents separately. Check the channel multiplexing and polarity settings in firmware because single-ended and differential conversions use different input relationships. Treat the unused analog pins according to the manufacturer's pin-description table when assigning PCB tracks.
Alternatives de remplacement direct pour MCP3304-CI/SL — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MCP3304-CI/SL (même facteur de forme et même empreinte) — différant par Differential Input Channels, Differential Nonlinearity, Package, Single-Ended Input Channels.
MCP3304-I/SL
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3304-CI/SL-TR
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3304-TI/SL
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3304-E/SL
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3304-CI/SL Valeurs maximales et caractéristiques électriques
| Résolution | 13 bit |
| Converter Type | Successive-approximation register (SAR) ADC |
| Maximum Sampling Rate | 100 ksps |
| Differential Input Channels | 4 |
| Single-Ended Input Channels | 8 |
| Input Configuration | 4 differential or 8 single-ended inputs |
| Supply Type | Single supply |
| Maximum Supply Voltage | 5.5 V |
| Digital Interface | SPI serial interface |
| Boîtier | 16-pin SOIC, 3.9 mm x 6.0 mm |
| Type de montage | Surface mount |
| Differential Nonlinearity | ±1 LSB max |
| Integral Nonlinearity, Grade B | ±1 LSB max |
| Integral Nonlinearity, Grade C | ±2 LSB max |
Guide de configuration des broches du MCP3304-CI/SL 16-pin soic, 3.9 mm x 6.0 mm
Configuration des broches du MCP3304-CI/SL (boîtier 16-pin soic, 3.9 mm x 6.0 mm). 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 MCP3304-CI/SL.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MCP3304-CI/SL convient pour 6 applications: Battery-Powered Environmental Monitoring, Industrial Process-Control Node, Remote Data-Acquisition System, Precision Analog Sensor Interface, Laboratory and Test Equipment, Battery-Powered Handheld Instruments.
Battery-Powered Environmental Monitoring
The MCP3304-CI/SL fits distributed battery-powered monitors that measure temperature, humidity, light, or soil conditions. Four differential inputs reduce sensitivity to sensor lead noise, while the alternate eight single-ended mode allows more resistive sensors to share one converter. The 100 ksps conversion rate supports rapid sampling, and the device's low-power focus suits duty-cycled acquisition nodes that sleep between readings. Differential pairing of each sensor with a stable reference or ground-referenced return also improves common-mode rejection in long cable runs. A microcontroller can control the SPI interface, select channels, and timestamp readings before local logging or radio transmission.
Recommandé
Industrial Process-Control Node
The MCP3304-CI/SL is appropriate for remote industrial nodes that digitize pressure, level, or valve-position feedback. Differential inputs support measurement of small sensor signals riding on larger common-mode voltages, an important advantage in factory environments containing motor and switching equipment. The 13-bit, 100 ksps converter provides 4,096 code levels per conversion, and the four-channel differential configuration allows several transducer outputs to share one ADC. An embedded SPI master can perform scaling, filtering, and limit checks before transmitting process values to a supervisory controller. Layout should keep the analog front end close to the converter and separate digital return paths from sensor references.
Recommandé
Remote Data-Acquisition System
The MCP3304-CI/SL supports compact remote acquisition units that gather multiple analog sensor channels near the source and send conditioned digital results over a communication link. Its 13-bit resolution, four differential inputs, and 100 ksps maximum rate provide adequate speed for many vibration, position, and analog-transducer measurements. The SPI interface permits simultaneous connection with a flash memory for configuration and event logging. Because differential inputs can reject common-mode noise, they are useful where the converter is mounted near long sensor cables rather than beside the controller. Firmware can select a channel, start a conversion, read the result, and apply calibration coefficients without requiring a separate multiplexer.
Recommandé
Precision Analog Sensor Interface
The MCP3304-CI/SL is well suited to bridge outputs, strain-gauge stages, and other sensors that require differential excitation and measurement. The converter accepts four differential input pairs, reducing the need for multiple analog front ends when several bridge-based sensors are monitored. A 13-bit conversion provides sufficient resolution for many slow-changing physical measurements while the 100 ksps capability allows oversampling and averaging. Low-level signals remain most accurate when the source impedance is balanced and the reference network is quiet. Designers should use the manufacturer input model to determine acquisition timing and capacitor requirements before adding filtering that could alter the measurement bandwidth.
Recommandé
Laboratory and Test Equipment
The MCP3304-CI/SL can digitize control and monitor voltages in compact laboratory instruments that need more than a microcontroller's internal ADC. Four differential inputs allow measurement of a stimulus together with feedback, sense lines, or instrument reference voltages, which improves accuracy in ratiometric systems. The 100 ksps conversion rate supports waveform sampling, averaging, and real-time panel updates, while SPI permits rapid transfer to a display or host computer. The converter's 16-SOIC package also suits modular analog boards with standard surface-mount assembly. For precision work, the external reference should be low-noise and temperature-stable, and analog input filtering should be selected against the required measurement bandwidth.
Recommandé
Battery-Powered Handheld Instruments
The MCP3304-CI/SL supports handheld meters and portable analyzers that combine several analog inputs with low-power operation. Eight single-ended inputs can accommodate battery voltage, current, temperature, and user-selected ranges, while differential mode improves measurements from resistive bridges or differential probes. Because the device is designed for low power, it can remain available during intermittent measurement without continuously driving all sensor circuits. A low-power controller can enable analog sections, select the required input, and read the result over SPI. Component selection should consider the temperature-grade suffix, reference-current budget, and the voltage required by the analog front end, since the converter itself operates from a single supply up to 5.5 V.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCP3304-CI/SL — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCP3304-I/SL | MCP3304-CI/SL-TR | MCP3304-TI/SL | MCP3304-E/SL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-pin SOIC | 16-pin SOIC - same | 16-pin SOIC - same | 16-pin SOIC - same | 16-pin SOIC - same |
| Resolution | 13 bit | 13 bit | 13 bit | 13 bit | 13 bit |
| Maximum Conversion Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Differential Input Channels | 4 | 4 | 4 | 4 | 4 |
| Single-Ended Input Channels | 8 | 8 | 8 | 8 | 8 |
| Digital Interface | SPI | SPI | SPI | SPI | SPI |
| Supply Configuration | Single supply, 5.5 V maximum | Single supply, 5.5 V maximum | Single supply, 5.5 V maximum | Single supply, 5.5 V maximum | Single supply, 5.5 V maximum |
| Differential Nonlinearity | ±1 LSB max | ±1 LSB max | ±1 LSB max | ±1 LSB max | ±1 LSB max |
| Temperature-Grade Suffix | CI | I | CI | TI | E |
Principaux différenciateurs
- Four differential channels provide noise-robust measurement in industrial and remote sensor systems (vs MCP3304-I/SL)
- A 13-bit SAR architecture combines 4,096 codes with a 100 ksps maximum conversion rate (vs MCP3304-TI/SL)
- The SPI interface and 16-SOIC footprint simplify reuse of an existing mixed-signal board (vs MCP3304-E/SL)
Notes de conception
Route the MCP3304 analog inputs directly from the sensor interface and keep the SPI traces away from sensitive input nodes. Place the reference bypass capacitor at the REF and VDD pins, and use the pin-description table in the Microchip data sheet to identify analog, digital, and ground pins. A solid ground plane under the converter helps maintain a low-impedance return, while separating analog and digital return paths limits SPI switching noise from appearing in the conversion result.
Treat the analog source impedance as part of the acquisition circuit because charge injection during sample-and-hold operation can create a settling error. Follow the input model and recommended external capacitor values in the manufacturer data sheet, and keep the signal source impedance balanced across differential pairs. For slow-changing sensors, oversampling and digital averaging can reduce uncorrelated noise, but excessive input filtering may increase settling time and should be verified against the required sample rate.
Do not interchange the single-ended and differential channel registers or assume that adjacent input pins form a differential pair without checking the MCP3304 pin and channel tables. A differential measurement uses the relationship between two inputs, while a single-ended measurement references one input to an analog ground. Validate conversion codes with known reference and input voltages during bring-up, and confirm the exact temperature-grade and packaging suffix before committing a production order.
Informations de conformité
Compliance declarations should be confirmed against the current Microchip product documentation and the exact ordering code.
