MCP3302-BI/ST - 13-Bit Dual-Channel SPI ADC | Microchip
Référence : MCP3302-BI/ST ✓ ActifMCP3302-BI/ST Présentation
An ADC is a data-acquisition IC that converts an analog voltage into a digital code for processing by a microcontroller or other digital controller. The MCP3302 belongs to the ADC > data-converter > data-acquisition IC hierarchy and supports precision measurement in battery-powered systems, industrial equipment, remote sensors, and test instruments. Its differential inputs are particularly useful when the source is a bridge sensor or another circuit centered around a biased reference voltage.
The MCP3302-BI/ST provides 13-bit conversion resolution, two differential or four single-ended input channels, and a maximum sampling rate of 100 kSPS. The SPI interface supports communication with a host processor, while the operating-temperature range of -40°C to +85°C suits industrial equipment. The 14-TSSOP package also allows reuse of a compact mixed-signal PCB layout where analog conversion must coexist with digital control circuitry.
The device uses a successive-approximation conversion architecture, meaning the internal converter determines each result through a sequence of increasingly accurate bit decisions. Its low-power design is appropriate for portable and remote data-acquisition systems. Differential sampling can improve common-mode rejection when the measured signal is small and appears in the presence of process noise, although front-end conditioning remains necessary to keep the input voltage within the converter’s valid range.
Typical uses include measuring pressure, temperature, strain, potentiometer positions, and other slowly changing analog signals. It can also serve industrial control modules, battery-powered environmental monitors, laboratory measurement equipment, and remote telemetry systems. For multiplexed sensors, separate analog switches may be required because the target configuration provides two differential or four single-ended channels.
Design the reference-voltage and analog-input network carefully. Keep SPI traces short, provide a clean supply path, decouple the supply and reference pins near the IC, and route analog inputs away from switching nodes. Confirm input range, acquisition timing, and digital logic levels against the manufacturer datasheet before finalizing the schematic and PCB layout.
This product page combines the manufacturer’s device description with practical selection criteria, compatible alternatives, interface considerations, and design guidance to support faster engineering evaluation and more accurate PCB planning.
Alternatives de remplacement direct pour MCP3302-BI/ST — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MCP3302T-BI/ST
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCP3202-BI/ST
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3204-BI/ST
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3004-BI/ST
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCP3302-BI/ST Valeurs maximales et caractéristiques électriques
| Résolution | 13 bit |
| Analog Input Channels | 2 differential or 4 single-ended |
| Conversion Architecture | Successive-approximation (SAR) |
| Maximum Sampling Rate | 100 kSPS |
| Digital Interface | SPI serial interface |
| Tension d'alimentation | 2.7 V |
| Température de fonctionnement | -40°C to +85°C |
| Boîtier | 14-pin TSSOP |
| Type de montage | Surface mount |
| Channel Configuration | 2 channels in differential mode |
| Input Type | Fully differential |
Guide de configuration des broches du MCP3302-BI/ST 14-pin tssop
Configuration des broches du MCP3302-BI/ST (boîtier 14-pin tssop). 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 MCP3302-BI/ST.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MCP3302-BI/ST convient pour 6 applications: Industrial Pressure and Strain Acquisition, Battery-Powered Environmental Monitoring, Remote Data Acquisition, Laboratory and Instrumentation, Position and Potentiometer Measurement, Automotive and Equipment Control Modules.
Industrial Pressure and Strain Acquisition
The MCP3302-BI/ST is suitable for bridge-based pressure and strain measurements where a 13-bit SAR converter provides more useful resolution than a 12-bit ADC. Its two differential inputs can acquire complementary bridge signals while rejecting common-mode voltage, and the 100 kSPS maximum rate supports responsive measurements from moderately varying loads. Place the bridge and amplifier near the converter, reference the analog section from a low-noise supply, and verify that sensor excitation, input range, and acquisition timing meet the device limits. Differential signal conditioning also reduces sensitivity to shared ground offsets in industrial wiring.
Recommandé
Battery-Powered Environmental Monitoring
The MCP3302-BI/ST works well in remote temperature, humidity, and air-quality monitors because it combines 13-bit measurement resolution with low-power operation in a compact 14-pin TSSOP package. Four single-ended inputs can service several slow-changing sensors, while the 100 kSPS capability provides substantial timing margin over low-bandwidth environmental signals. Operating the converter selectively can reduce system energy use. Designers should choose a reference and front-end amplifier with low current consumption, protect unused inputs, and calculate battery life using the measurement interval and duty cycle.
Recommandé
Remote Data Acquisition
The MCP3302-BI/ST is appropriate for distributed sensor nodes that digitize analog measurements before transmitting results through a communications link. Two differential inputs support current- or voltage-sensing channels, while the SPI interface allows a microcontroller or radio-equipped controller to retrieve conversions efficiently. The 13-bit code and 100 kSPS rate are suitable for telemetry of pressure, position, temperature, and power-system variables. A practical design should isolate field wiring, provide surge protection, use a stable reference, and validate conversion timing before selecting the final communications protocol.
Recommandé
Laboratory and Instrumentation
The MCP3302-BI/ST can support laboratory instruments that digitize bounded analog signals with 13-bit resolution and a 100 kSPS conversion rate. Two differential channels are useful for transducer outputs or differential amplifier stages, reducing the need for separate single-ended conditioning where common-mode noise is present. Because instrument accuracy depends on the complete analog chain, use a stable reference, calibrated gain stage, and well-controlled layout. The ADC should be positioned away from relay contacts and switching supply nodes so converter performance is not limited by the measurement system.
Recommandé
Position and Potentiometer Measurement
The MCP3302-BI/ST is well suited to potentiometer, rotary encoder, and analog-position sensing because it can evaluate four single-ended channels with 13-bit resolution at rates up to 100 kSPS. The conversion speed allows the host processor to sample several positions within a short control interval and apply calibration or filtering. Accuracy still depends on excitation stability, reference quality, input impedance, and mechanical repeatability. Place the resistive sensor near the converter when possible, route the signal away from SPI switching edges, and include sufficient filtering to reject repeated contact noise.
Recommandé
Automotive and Equipment Control Modules
The MCP3302-BI/ST can be evaluated for equipment-control modules that need to monitor analog sensors within the device’s -40°C to +85°C operating range. The 13-bit resolution supports accurate pressure, temperature, and actuator feedback, while the 14-pin TSSOP package simplifies compact mixed-signal layouts. Temperature qualification must be matched to the final assembly’s environmental requirements; MCP3302T-BI/ST provides a higher-temperature option when needed. In addition to the converter itself, production designs should include transient protection, grounding strategy, diagnostic checks, and fault handling for sensor wiring failures.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCP3302-BI/ST — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCP3302T-BI/ST | MCP3202-BI/ST | MCP3204-BI/ST | MCP3004-BI/ST |
|---|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Resolution | 13 bit | 13 bit | 12 bit | 12 bit | 12 bit |
| Digital Interface | SPI | SPI | SPI | SPI | SPI |
| Conversion Architecture | SAR | SAR | SAR | SAR | SAR |
Principaux différenciateurs
- Higher conversion resolution than the 12-bit same-package alternatives (vs MCP3202-BI/ST)
- Configurable two-differential or four-single-ended input architecture (vs MCP3004-BI/ST)
- Extended-temperature family option with the same package (vs MCP3302T-BI/ST)
Notes de conception
Keep the analog input traces short and position the input and reference bypass capacitors close to the MCP3302-BI/ST pins. Route SPI signals away from sensitive input nets, maintain a continuous ground reference beneath the analog section, and avoid placing the converter next to high-current switching paths. The 14-pin TSSOP footprint saves board area, but it does not remove the need for controlled return-current paths or quiet reference distribution.
Do not assume that a 14-pin TSSOP alternative is automatically interchangeable. MCP3202-BI/ST, MCP3204-BI/ST, and MCP3004-BI/ST use 12-bit conversion resolution, one bit below MCP3302-BI/ST. Compare pin functions, SPI command handling, acquisition timing, reference voltage, input limits, and firmware conversion scaling before releasing a replacement to production.
The MCP3302-BI/ST is intended for low-power measurement, but system energy depends on the conversion duty cycle and external circuitry. Use the manufacturer’s conversion-current and standby-current characteristics when sizing the analog supply and battery budget. For slow environmental sensors, trigger conversions at the required measurement interval and place the controller and converter into an appropriate low-power state between samples.
A stable reference is fundamental because reference variation can dominate the accuracy of a 13-bit measurement. Use a clean reference source, route it separately from noisy digital return paths, and check its settling time against the ADC acquisition sequence. Differential inputs help reject common-mode noise, but they still require common-mode voltage, input impedance, and acquisition-time compliance with the manufacturer specifications.
Informations de conformité
No product-specific compliance declarations were identified in the manufacturer page excerpt, so each compliance status remains unknown.