MCP3204-CI/ST - 12-Bit 4-Channel SAR ADC | Microchip
MPN： MCP3204-CI/ST ✓ 啟用中MCP3204-CI/ST 概覽
An analog-to-digital converter, or ADC, converts continuous analog voltage signals into digital values that a microcontroller or other digital controller can process. The MCP3204 belongs to the SAR ADC family, whose successive approximation architecture compares the input voltage with a internally generated reference through a successive sequence of conversion steps. Its SPI interface reduces the number of signal connections required for transferring conversion results.
The MCP3204-CI/ST provides four analog input channels, 12-bit conversion resolution, and a 100 ksps conversion rate in a 14-pin TSSOP package. Its operating supply voltage begins at 2.7 V, making it appropriate for embedded systems that cannot support a 5 V-only analog interface. The automotive qualification indicated for this ordering code supports its use in vehicle-oriented electronic control systems when the complete system requirements are satisfied.
The SPI interface supports integration with microcontrollers, programmable controllers, and data-acquisition systems. Four analog inputs allow one converter to serve multiple sensors or conditioned analog signals while avoiding the footprint and component count of four unrelated converter packages. The 12-bit result provides 4,096 discrete codes across the selected input range, while the 100 ksps rate supports rapidly changing measurements when the acquisition and signal-conditioning path are designed appropriately.
Typical uses include automotive sensor acquisition, industrial control systems, battery and power monitoring, laboratory data acquisition, and embedded instrumentation. The converter can be paired with analog front-end circuits, voltage references, op-amp signal-conditioning stages, and SPI-capable microcontrollers. Its low-voltage operation and compact TSSOP outline are useful where board area, energy use, and deterministic serial communication are important.
The principal design considerations are reference quality, input-range configuration, source impedance, acquisition timing, and SPI clocking. Input signals must remain within the selected analog range, and the sampling network should present sufficiently low impedance to the converter's sample-and-hold input. PCB traces should be kept short, reference connections stable, and digital return currents controlled to minimize conversion errors.
This product page combines the manufacturer description with distributor and cross-reference information to summarize the MCP3204-CI/ST's resolution, channel count, sampling rate, interface, package, application fit, and replacement considerations. It also provides engineering-focused guidance for PCB layout, signal conditioning, and component selection.
直接替換替代品，適用於 MCP3204-CI/ST — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MCP3204-CI/ST （相同外形與佔位） — 差異在於 Number of Analog Input Channels, Package.
MCP3204-I/ST
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP3204-T/ST
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP3204-CI/ST 最大額定值與電氣特性
| Converter Type | 12-bit successive approximation register ADC |
| Number of Analog Input Channels | 4 channels |
| 取樣率 | 100 ksps |
| Digital Interface | SPI |
| Minimum Supply Voltage | 2.7 V |
| 封裝 | 14-pin TSSOP |
| Package Type | TSSOP |
| Automotive Qualification | AEC-Q100 |
| Converter Architecture | Successive approximation register |
| 解析度 | 12 bit |
| Shipping Package | Tube |
MCP3204-CI/ST tube 腳位配置指南
MCP3204-CI/ST（tube 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MCP3204-CI/ST.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP3204-CI/ST 適用於 6 應用s: Automotive Sensor Acquisition, Industrial Process Control, Battery and Power Monitoring, Precision Data Acquisition, Embedded Instrumentation, Educational and Maker Platforms.
Automotive Sensor Acquisition
The MCP3204-CI/ST fits automotive sensor acquisition because it combines four analog input channels, 12-bit conversion resolution, and a 100 ksps sampling rate in a 14-pin TSSOP package. The MCP3204-CI/ST ordering code is identified as automotive AEC-Q100 qualified, supporting its use in vehicle electronic systems. Place the converter after the required sensor amplifiers, filters, and protection networks, then use its SPI interface to transfer readings to a vehicle controller. The four-channel architecture can consolidate related measurements, but signal levels must remain within the selected input range and the complete external interface must meet the vehicle program’s qualification requirements.
推薦
Industrial Process Control
The MCP3204-CI/ST supports industrial process-control systems that must digitize several slowly or moderately changing analog signals. Its four inputs reduce the number of separate ADC footprints, while 12-bit resolution and a 100 ksps conversion rate provide useful measurement granularity for temperature, pressure, position, and level feedback. Condition each sensor with suitable buffering and filtering before connecting it to the converter. The SPI interface allows the acquisition results to be integrated into a programmable controller, and the 2.7 V minimum operating voltage supports compact embedded instrumentation. Validate input range, acquisition timing, and error behavior under the actual process bandwidth.
推薦
Battery and Power Monitoring
The MCP3204-CI/ST is appropriate for multi-rail battery and power-monitoring systems where voltage, current, temperature, or charger-state signals must be digitized for a controller. Four analog inputs allow several measurements to share one converter, and the 12-bit, 100 ksps SAR ADC can follow changing signals while its SPI interface provides a compact connection to embedded logic. Use precision dividers, current-sense amplifiers, and filtering networks to scale external voltages safely into the converter's input range. The 2.7 V minimum supply is useful for compact mixed-voltage systems, although power-consumption requirements should be checked against the complete acquisition cycle.
推薦
Precision Data Acquisition
The MCP3204-CI/ST can serve compact laboratory and bench data-acquisition systems requiring four synchronized-by-sequence analog inputs with 12-bit resolution. Its 100 ksps rate is suitable for many sensor and control signals, while the SPI interface simplifies connection to a controller, logger, or embedded instrument. For low-level measurements, use a low-noise reference and an appropriate analog front end, and keep the converter input source impedance within the manufacturer's recommended range. Sampling capacitors, reference routing, and grounding determine usable accuracy, so evaluate the complete signal chain rather than relying on nominal resolution alone.
推薦
Embedded Instrumentation
The MCP3204-CI/ST suits embedded instrumentation where several external analog signals must be converted without adding a large converter array. The four-channel device combines 12-bit resolution, a 100 ksps conversion rate, and serial output in a compact 14-pin TSSOP outline. It can monitor temperature, light, pressure, or control-loop feedback signals in a portable instrument. Use the SPI bus to share the converter with other peripherals when the controller supports chip selection, or dedicate the interface if deterministic transaction timing is required. Place the analog front end near the converter and route the SPI clock and return currents away from sensitive input and reference nodes.
推薦
Educational and Maker Platforms
The MCP3204-CI/ST is useful for educational and maker platforms that teach SPI sampling, analog signal conditioning, and multichannel acquisition. Its 12-bit resolution provides 4,096 codes, the four inputs allow students to compare multiple sensors, and the 100 ksps rate supports rapid demonstrations and basic data logging. A platform should provide at least 2.7 V, compatible SPI signaling, and clearly defined analog input ranges. Although the part is sold in a 14-pin TSSOP package, adapters or compact breakout layouts can simplify prototyping. Do not apply voltages beyond the input and absolute-maximum limits defined in the manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 MCP3204-CI/ST — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MCP3204-I/ST | MCP3204-T/ST |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP |
| Resolution | 12 bit | 12 bit | 12 bit |
| Analog Input Channels | 4 channels | 4 channels | 4 channels |
| Sampling Rate | 100 ksps | 100 ksps | 100 ksps |
| Converter Architecture | Successive approximation register | Successive approximation register | Successive approximation register |
| Digital Interface | SPI | SPI | SPI |
| Minimum Supply Voltage | 2.7 V | 2.7 V | 2.7 V |
主要差異化特點
- Four-channel integration reduces the number of separate converter footprints (對比MCP3204-I/ST)
- Automotive-qualified ordering option (對比MCP3204-T/ST)
- Identical core ADC ratings across the listed TSSOP options (對比MCP3204-I/ST)
設計說明
Route the four analog inputs as short, quiet traces and place their associated protection, filtering, or sampling components close to the MCP3204-CI/ST. Reference and analog ground connections should follow the pin-assignment guidance in the manufacturer datasheet. Keep SPI clock, chip-select, and data-return currents away from the analog input and reference nodes. A quiet analog layout is especially important because nominal 12-bit resolution does not guarantee full 12-bit accuracy when the signal chain contains noise or impedance-related conversion errors.
Design the analog front end so its output impedance remains compatible with the MCP3204-CI/ST sample-and-hold input during acquisition. Add only the capacitance recommended by the manufacturer for charge settling; excessive capacitance can require additional conversion time and reduce the practical sampling rate. Use a low-noise reference, stable divider or amplifier network, and an appropriate anti-alias filter. Verify the complete signal chain against the required bandwidth and measurement accuracy.
Do not treat the 2.7 V figure as permission to exceed the analog-input, reference, or absolute-maximum limits. Confirm the exact input range, supply range, pin states, and operating temperature from the official MCP3204 datasheet before final schematic sign-off. Confirm that the host controller can generate the required SPI clock and sample timing. Substituting a different package or changing from the CI grade to another suffix can alter qualification or temperature requirements even when the basic converter ratings remain unchanged.
Plan the PCB for the 14-pin TSSOP footprint and its thermal or copper requirements, not for a generic 14-pin outline. Follow the manufacturer land pattern and solder-mask recommendations. A 14-pin TSSOP package provides limited lead area for heat transfer, so place the converter away from localized heat sources and preserve adequate copper where practical. Maintain consistent return paths from the controller and analog circuitry to reduce ground potential differences across the board.
合規資訊
The MCP3204-CI/ST product listing identifies the device as automotive AEC-Q100 qualified. No additional RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations are stated in the cited product information.