MCP3202-BI/SN - 12-Bit Dual-Channel 100 ksps ADC | Microchip
料号： MCP3202-BI/SN ✓ 量产中MCP3202-BI/SN 概述
An ADC is a data-acquisition interface that converts continuous voltage signals into digital values for processing by a microcontroller or another digital controller. The MCP3202 belongs to the SAR ADC family, where an internal sample-and-hold circuit and successive comparison process produce a 12-bit result. This architecture is suited to embedded control, instrumentation, sensor measurement, and low-bandwidth analog monitoring systems.
The converter's principal characteristics include two analog input channels, a resolution of 12 bits, and a maximum conversion rate of 100 ksps at a 5 V supply. At a 2.7 V supply, the documented conversion rate is 50 ksps. Low-power operation is reflected by typical standby and active currents of 500 nA and 375 µA, respectively, making the device useful in battery-operated embedded systems.
SPI-compatible communication allows the MCP3202-BI/SN to connect to PICmicro and other SPI-capable microcontrollers while minimizing the number of signal lines required. The serial interface supports conversion-result transfer and channel selection through digital control signals. Because the device uses a SAR architecture rather than a continuous pipeline, it provides deterministic sampling behavior for general-purpose embedded measurement.
Typical uses include potentiometer and resistive-sensor interfaces, industrial control inputs, low-voltage battery monitoring, digital panel meters, and compact data-acquisition modules. The device is also suitable for educational platforms using Arduino-compatible controllers or Raspberry Pi systems equipped with suitable SPI interface hardware.
Designers should verify analog input voltage limits, reference-voltage behavior, source impedance, and acquisition timing against the operating voltage. A low source impedance, local analog grounding, and short PCB traces help preserve conversion accuracy. The SPI lines should also be arranged to minimize coupling from fast-switching digital signals into the analog input path.
This product page combines manufacturer specifications, lifecycle information, drop-in family options, application guidance, and a parameter-by-parameter comparison. It helps engineers identify whether the MCP3202-BI/SN matches a required channel count, sampling rate, supply range, package, and low-power embedded-control design.
直接替换替代料： MCP3202-BI/SN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MCP3202-BI/SN （相同外形与封装尺寸） ——差异在于 Typical Active Current.
MCP3202T-BI/SN
✅ 直接替换📋 参考替代料（不在目录中）
MCP3202-CI/SN
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →MCP3202-AI/SN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MCP3202-I/SN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MCP3202-BI/SN 最大额定值与电气特性
| 分辨率 | 12 bit |
| Analog Input Channels | 2 channels |
| Input Type | Single-ended |
| ADC Architecture | Successive approximation register (SAR) |
| Maximum Conversion Rate at 5 V | 100 ksps |
| Maximum Conversion Rate at 2.7 V | 50 ksps |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Typical Standby Current | 500 nA |
| Typical Active Current | 375 µA |
| Serial Interface | SPI-compatible |
| 封装 | 8-pin SOIC |
| 安装类型 | Surface mount |
| 生命周期状态 | Active |
| Standard Lead Time | 5 weeks |
| RoHS Compliance | Compliant |
| Lead-Free Status | Lead-free |
MCP3202-BI/SN 8-pin soic 引脚配置指南
MCP3202-BI/SN（8-pin soic 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： MCP3202-BI/SN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MCP3202-BI/SN 适用于 6 应用s: Industrial Sensor Acquisition, Battery-Powered Portable Instrumentation, Arduino-Compatible Sensor Interface, Raspberry Pi Data Acquisition, Digital Panel Meter, Embedded Control and Feedback.
Industrial Sensor Acquisition
The MCP3202-BI/SN suits two-channel industrial monitoring because it combines 12-bit resolution with a maximum sampling rate of 100 ksps at 5 V and a dual-channel SAR architecture. Place the converter close to resistive, current, or temperature sensor inputs to minimize trace pickup and conversion error. Its SPI-compatible interface transfers each result to a PICmicro or other embedded controller without requiring a parallel data bus. For slow-changing process signals, the 50 ksps rate available at 2.7 V is generally more than adequate, although the complete signal chain, reference, and sensor settling behavior must be checked. Typical standby current is 500 nA, which also benefits compact or intermittently powered monitoring equipment.
推荐
Battery-Powered Portable Instrumentation
The MCP3202-BI/SN is useful in battery-powered measurement instruments where two analog signals must be digitized without continuously powering a high-current ADC. Its typical standby current is 500 nA and typical active current is 375 µA, allowing the controller to enable conversions only when a reading is required. Operation from 2.7 V to 5.5 V supports systems using either a low-voltage cell or a regulated 3.3 V rail. At 2.7 V, the documented maximum conversion rate is 50 ksps, which should be included in the sampling schedule. The SPI-compatible interface also keeps wiring and firmware straightforward for compact portable instruments, provided the host controller supplies compatible logic levels.
推荐
Arduino-Compatible Sensor Interface
The MCP3202-BI/SN can add two 12-bit analog channels to an Arduino-compatible embedded controller through its SPI-compatible interface. This arrangement is useful for potentiometers, light sensors, temperature dividers, and simple analog output feedback where the default controller ADC is insufficient. The MCP3202 reaches 100 ksps at 5 V, enabling substantially faster sampling than many general-purpose educational platforms provide. Keep the converter's analog ground and signal traces away from motor, relay, and PWM return currents because those can corrupt conversion results. Confirm the development board's logic voltage, SPI mode, and selected CS behavior in firmware, then use the manufacturer's pin table for final board wiring.
推荐
Raspberry Pi Data Acquisition
The MCP3202-BI/SN provides a simple two-channel, 12-bit acquisition path for Raspberry Pi-based test equipment. The controller can initiate conversions through SPI, read the serial result, and apply calibration in software. A 5 V operating point permits the documented 100 ksps conversion rate, while lower-voltage operation is limited to 50 ksps. For reliable measurements, use a local reference and ground the analog section carefully, especially when the Raspberry Pi shares a power source with motors or switching regulators. SPI wiring length should be minimized, and CS should change state only between complete conversions. The same wiring and timing approach can support automated production tests, teaching stations, and environmental monitoring prototypes.
推荐
Digital Panel Meter
The MCP3202-BI/SN can digitize two analog quantities for a digital panel meter, such as a supply voltage and a sensor-derived process variable. Twelve-bit resolution provides 4096 code levels per channel, while the dual-channel architecture permits related readings to be captured without changing the converter. The SPI interface reduces the pin count required on a display-oriented controller, leaving more I/O available for buttons, indicators, and communications. Because panel meters often operate from a shared 5 V or 3.3 V rail, verify ripple at the ADC supply and use careful grounding to prevent display or switching activity from shifting readings. The 375 µA typical active current is low, but overall meter power depends on the controller, display, and interface circuitry.
推荐
Embedded Control and Feedback
The MCP3202-BI/SN supports closed-loop embedded control when two feedback or monitoring quantities must be measured. The 100 ksps maximum rate at 5 V permits rapid sampling, while the SAR architecture provides a straightforward sampled measurement for a control loop. SPI-compatible transfer allows sampled values to be processed by a PICmicro or other microcontroller with minimal bus overhead. Use separate analog and digital ground connections where appropriate, place the reference network close to the device, and avoid routing converter clock and SPI traces beneath sensitive input traces. If the application requires more than two channels, simultaneous sampling, or input voltages beyond the converter's supported range, select a higher-channel or more specialized ADC instead of forcing extra signals through the available inputs.
推荐
推荐产品汇总
工程参考数据： MCP3202-BI/SN ——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 | MCP3202T-BI/SN | MCP3202-CI/SN | MCP3202-AI/SN | MCP3202-I/SN |
|---|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Analog Input Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Maximum Conversion Rate at 5 V | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Maximum Conversion Rate at 2.7 V | 50 ksps | 50 ksps | 50 ksps | 50 ksps | 50 ksps |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Typical Standby Current | 500 nA | 500 nA | 500 nA | 500 nA | 500 nA |
| Typical Active Current | 375 µA | 375 µA | 375 µA | 375 µA | 375 µA |
| Serial Interface | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible |
关键差异点
- Two-channel 12-bit conversion in an 8-pin SOIC （对比 MCP3201-BI/SN)
- Documented family alternate with the same electrical footprint （对比 MCP3202T-BI/SN)
- Conversion-rate trade-off across the supply range （对比 MCP3202-CI/SN)
设计说明
Do not assume that identical SOIC-8 footprints guarantee identical function across every ADC family. The MCP3202 family alternatives retain the dual-channel 12-bit architecture and pin arrangement, but the orderable suffix can change temperature qualification or packing. Review the manufacturer pin-description table and complete ordering information for the exact replacement. Also verify that the analog input range and reference arrangement match the original design.
Route the two analog inputs as short, quiet traces directly from the sensor or divider to the converter. Keep SPI clock, chip-select, and digital-control traces away from sensitive input nodes, especially when sampling small sensor signals. Connect analog and digital ground paths carefully according to the manufacturer application guidance, and place reference and bypass components near their associated pins. These measures reduce coupling from switching nodes and preserve available conversion accuracy.
The MCP3202-BI/SN accepts 2.7 V to 5.5 V, but its maximum conversion rate changes with supply: 100 ksps is documented at 5 V, while the rate at 2.7 V is 50 ksps. Use a quiet local supply and bypass network close to the device. When the host controller and converter use different rails, verify input logic levels, bus direction, and power-sequence behavior rather than relying only on nominal SPI compatibility.
Treat every SPI transaction as a complete conversion sequence. Assert chip select before starting a conversion, allow the required acquisition and conversion interval, and deassert it only after the result clocking sequence is complete. Avoid asynchronous transitions on the serial interface while the converter is sampling. If multiple converters share the SPI bus, give each device a dedicated chip-select signal or ensure that firmware keeps the shared lines in a defined state during selection.
合规信息
The product listing identifies MCP3202-BI/SN as RoHS compliant and lead-free. No REACH, halogen-free, conflict-minerals, or automotive-qualification statement was established for this exact suffix.
