MCP3304-BI/SL - 13-Bit 4-Channel SPI ADC | Microchip
料号： MCP3304-BI/SL ✓ 量产中MCP3304-BI/SL 概述
An ADC converts continuous analog voltages into digital values for processing, storage, or transmission. The MCP3304 belongs to the successive-approximation ADC family and uses a comparator, internal DAC, and sampling network to determine each converted result. Its differential inputs support two differential channels or four single-ended channels, allowing it to reject common-mode noise when the source is arranged around a biased reference.
Key features include 13-bit resolution, four analog input channels, a 100 ksps sampling rate, and an industry-standard SPI serial interface. Differential input capability is especially useful for bridge sensors, current measurements, and low-level signals referenced to a midpoint voltage. The 2.7 V minimum operating voltage supports low-power designs, while the converter's low-power characteristics suit portable and remote systems.
The SPI interface provides a straightforward connection to microcontrollers, sensors, and programmable logic. Conversion results are represented as digital words, while the analog front end performs sampling and successive approximation. Because the device is specified for a 100 ksps conversion rate, system timing should account for acquisition, conversion, and serial transfer intervals rather than treating the conversion rate as complete transaction throughput.
Typical uses include battery-powered environmental monitoring, industrial process measurement, remote sensor nodes, laboratory data acquisition, and low-level analog signal conditioning. The four-channel arrangement reduces the need for multiple converters when several related sensors must be measured. Differential operation can also improve immunity to common-mode disturbances when both input conductors share similar noise.
Design the input network to keep source impedance and settling behavior compatible with the selected acquisition system. Provide a clean reference voltage, route analog and digital return currents carefully, and use the manufacturer's pin-description table when assigning PCB tracks. The 16-pin SOIC package supports conventional surface-mount assembly, but analog trace routing and reference decoupling remain more important for measurement accuracy than package density alone.
This page combines the manufacturer product information, distributor listings, cross-reference results, practical interface guidance, and a focused comparison of documented alternatives. It is designed to help engineers identify whether the MCP3304-BI/SL matches the required resolution, channel count, interface, package, and operating conditions before committing a design to production.
直接替换替代料： MCP3304-BI/SL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MCP3304T-BI/SL
✅ 直接替换📋 参考替代料（不在目录中）
MCP3304T-CI/SL
✅ 直接替换📋 参考替代料（不在目录中）
MCP3304-BI/SL 最大额定值与电气特性
| ADC Type | Successive-approximation ADC |
| 分辨率 | 13 bit |
| Input Configuration | 4 single-ended or 2 differential inputs |
| Number of Channels | 4 channels |
| Input Type | Fully differential |
| 采样率 | 100 ksps |
| 电源电压 | 2.7 V minimum |
| Digital Interface | SPI serial interface |
| 接口类型 | Serial |
| 封装 | 16-pin SOIC, 3.90 mm width |
| 安装类型 | Surface mount |
| 工作温度 | -40 °C to +85 °C |
| Packaging | Tube |
| Power Consumption | Low power |
| Application | Battery-powered systems and remote data acquisition |
| Manufacturer | Microchip Technology |
MCP3304-BI/SL 16-pin soic, 3.90 mm width 引脚配置指南
MCP3304-BI/SL（16-pin soic, 3.90 mm width 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： MCP3304-BI/SL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MCP3304-BI/SL 适用于 6 应用s: Battery-Powered Environmental Monitoring, Industrial Process Measurement, Remote Data Acquisition, Bridge and Load-Cell Measurement, Laboratory Instrumentation, Medical and Sensor Signal Conditioning.
Battery-Powered Environmental Monitoring
The MCP3304-BI/SL fits portable environmental monitoring because its 13-bit resolution, four-channel input arrangement, and low-power operation suit battery-operated sensor nodes. Two differential channels can monitor bridge or ratiometric sensors, while the other inputs can serve grounded probes. The 100 ksps conversion capability provides more than enough throughput for temperature, humidity, light, and gas sensing. Its SPI interface also keeps the connection compact for microcontrollers operating from limited supply rails. The 2.7 V minimum operating voltage supports low-energy designs, although the complete supply range and current consumption should be confirmed in the manufacturer datasheet. A shared reference and carefully routed analog ground are especially important when the measured signals are close to the converter's noise floor.
推荐
Industrial Process Measurement
The MCP3304-BI/SL is suitable for industrial process measurement where several slowly changing analog signals must be digitized with limited board space. Its four single-ended inputs can support pressure, level, and position transducers, while two differential channels can improve measurement integrity for current-loop or bridge-based sensors. The 100 ksps rate is substantially above the sampling needs of most temperature, pressure, and slow process signals. A -40 °C to +85 °C documented operating-temperature range supports many industrial environments. Designers should still verify signal common-mode limits, source impedance, isolation requirements, and calibration strategy in the manufacturer datasheet. SPI clocking and conversion handling should be implemented so the host controller distinguishes a valid conversion result from previously sampled data.
推荐
Remote Data Acquisition
The MCP3304-BI/SL supports remote data-acquisition modules that measure multiple analog channels and transmit the results through a serial link. Its 100 ksps conversion rate allows rapid sampling when the system requires synchronized acquisition, while the four-channel configuration reduces converter count and board area. Differential operation is valuable in field environments where cables and shared grounds can introduce noise. The SPI interface works efficiently with a dedicated microcontroller or programmable logic device, and the low-power characteristic is advantageous in solar- or battery-powered installations. For long cable runs, add appropriate input protection and isolation rather than relying on the ADC alone. The 16-pin SOIC package is readily assembled but requires careful analog trace routing and a low-noise reference to preserve measurement quality.
推荐
Bridge and Load-Cell Measurement
The MCP3304-BI/SL is well matched to bridge-based sensing because it supports fully differential input channels and 13-bit resolution. A load cell or strain-gauge bridge commonly produces a small differential signal around a midpoint, making differential conversion preferable to grounding one side of the sensor. The four-input device can support two bridge channels, reducing the number of converters needed in a multi-axis instrument. Its 100 ksps rate also permits mechanical transient monitoring rather than only static load readings. Accurate results still depend on excitation regulation, input settling, reference quality, and PCB cleanliness. The differential input common-mode range and input capacitance should be checked against the bridge excitation voltage before layout release. A low-noise reference and short, symmetric input traces help preserve the measurable signal.
推荐
Laboratory Instrumentation
The MCP3304-BI/SL can serve as the analog front end in a compact laboratory measurement instrument. Four inputs allow a single converter to measure a reference, stimulus feedback, and two sensor outputs, while the 13-bit resolution supports general-purpose voltage measurement and control feedback. At 100 ksps, the device is suitable for waveforms and control loops that do not require a high-speed dedicated ADC. SPI transfers simplify integration with laboratory controllers and provides deterministic sampling control when the master clock is well behaved. Reference placement, grounding, and input buffering are critical when measurements approach the resolution limit. Use a stable reference source, decouple the supply close to the device, and keep digital switching currents away from sensitive analog inputs. Calibration should characterize offset, gain, and reference drift across the intended temperature range.
推荐
Medical and Sensor Signal Conditioning
The MCP3304-BI/SL is applicable to low-level biomedical or physiological sensor front ends where several channels must be digitized in a compact mixed-signal system. The 13-bit converter can capture temperature, pressure, or resistive bridge outputs, and its fully differential inputs help reject common-mode interference present on sensor cables. The 100 ksps sampling rate supports moderate-bandwidth acquisition, although it is not appropriate for high-frequency diagnostic waveforms requiring a dedicated high-speed converter. Medical-system designs must also satisfy applicable product-specific safety, isolation, and qualification requirements beyond the converter's own specifications. Use isolation where patient-connected circuitry requires it, maintain defined fail-safe states, and verify leakage and clearance independently. The converter's low-power operation is useful in portable instruments where battery life constrains the system architecture.
推荐
推荐产品汇总
工程参考数据： MCP3304-BI/SL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MCP3304T-BI/SL | MCP3304T-CI/SL |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-pin SOIC, 3.90 mm width | 16-pin SOIC | 16-pin SOIC |
| Resolution | 13 bit | 13 bit | 13 bit |
| Digital Interface | SPI serial interface | SPI serial interface | SPI serial interface |
关键差异点
- Four inputs can be configured for differential or single-ended measurement （对比 MCP3304T-BI/SL)
- Documented 100 ksps sampling capability （对比 MCP3304T-CI/SL)
- Low 2.7 V minimum operating voltage （对比 MCP3304T-BI/SL)
设计说明
Route differential input pairs as closely matched traces with a continuous ground reference. Keep the SPI clock, chip-select, and data lines away from the analog inputs, and place the reference and supply bypass capacitors near their associated pins. A quiet analog ground region and short return paths reduce conversion errors that can otherwise appear as noise or offset.
Use the manufacturer pin-description table to assign SPI signals and verify each analog input's permitted common-mode range. Account for source impedance, sampling charge, and the selected acquisition configuration so the source settles before conversion. Where a sensor cannot drive the inputs directly, add an appropriate low-noise buffer and confirm that its stability and output range are compatible with the ADC.
Do not treat the 100 ksps conversion rate as the complete SPI transaction rate. The host controller must allow for acquisition, successive-approximation conversion, and clocked data transfer. Also avoid substituting a family member based only on its package; compare suffix-specific grade, temperature, supply, and pin assignments in the manufacturer ordering information before release.
合规信息
Compliance requirements are not stated in the available product records. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status using the current manufacturer product documentation or declaration.
