MCP3004-I/ST - 10-Bit 4-Channel SPI ADC | Microchip
MPN： MCP3004-I/ST ✓ 啟用中MCP3004-I/ST 概覽
An ADC is a data-acquisition semiconductor that converts continuous analog voltage into a numeric value for processing by a microcontroller or other digital controller. The MCP3004 belongs to the SAR ADC hierarchy, where an internal sample-and-hold circuit and successive comparison determine each output code. It combines four single-ended inputs, two differential inputs, low power consumption, and a compact surface-mount package for embedded measurement systems.
Key features include 10-bit resolution, a 200 kSPS maximum sample rate, and an SPI interface suitable for embedded serial buses. Typical active current is 425 µA, while typical standby current is 5 nA. These characteristics make the converter suitable for systems that periodically acquire analog measurements without keeping the conversion circuitry continuously active.
The MCP3004 uses a successive-approximation conversion architecture to balance conversion speed, resolution, power consumption, and implementation complexity. Its SPI interface allows a host processor to initiate a conversion and retrieve the result digitally. Because it is a standalone ADC, it can be paired with microcontrollers that do not contain an integrated ADC or with systems that require dedicated analog front-end isolation from the digital processing section.
Typical applications include industrial process monitoring, temperature-sensor acquisition, potentiometer and resistive-divider measurement, battery-voltage monitoring, and low-speed data-acquisition systems. The four-channel arrangement permits concurrent selection among several sensor inputs, while differential operation supports measurements where signal integrity and common-mode rejection are important.
Designers should provide suitable analog and reference circuitry, keep the analog input and reference paths clean, and follow the manufacturer’s layout guidance for SPI and grounding. Supply and reference voltages must remain within the device limits, and input-source impedance should be considered because the acquisition network must charge the internal sample-and-hold capacitor.
This page consolidates the verified manufacturer and distributor information, identifies same-family drop-in alternatives, and adds application-specific design guidance, parameter comparisons, and sourcing information that are not presented as a single consolidated engineering view in the manufacturer product page.
直接替換替代品，適用於 MCP3004-I/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。
MCP3004T-I/ST
✅ 直接替換📋 參考替代品（不在目錄中）
MCP3004-I/STVAO
✅ 直接替換📋 參考替代品（不在目錄中）
MCP3004T-I/STVAO
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP3004-I/ST 最大額定值與電氣特性
| 解析度 | 10 bit |
| Total Input Channels | 4 channels |
| Differential Input Channels | 2 channels |
| Maximum Sampling Rate | 200 kSPS |
| Maximum Conversion Time | 2.78 us |
| Maximum Analog Input Voltage | 5 V |
| Conversion Architecture | Successive Approximation Register (SAR) |
| Digital Interface | SPI |
| Typical Active Current | 425 uA |
| Typical Standby Current | 5 nA |
| 封裝 | TSSOP-14 |
| 腳位數 | 14 pins |
| 安裝類型 | Surface Mount |
MCP3004-I/ST tssop-14 腳位配置指南
MCP3004-I/ST（tssop-14 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： MCP3004-I/ST.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP3004-I/ST 適用於 6 應用s: Industrial Process Monitoring, Temperature Sensor Acquisition, Battery Voltage Monitoring, Potentiometer and Control Input, Data Acquisition and Embedded Control, Portable and Wearable Sensing.
Industrial Process Monitoring
The MCP3004-I/ST fits industrial process-monitoring modules that acquire several slowly changing analog signals while remaining outside the resolution range of many built-in microcontroller ADCs. Its four inputs and two differential channels can support pressure, level, or position sensing, while 10-bit resolution provides 1024 codes across the selected reference range. The 200 kSPS maximum sampling rate is substantially faster than typical process signals, and the 425 µA typical active current supports duty-cycled operation. For noisy factory environments, differential inputs, proper grounding, filtering, and a quiet reference network are essential.
推薦
Temperature Sensor Acquisition
MCP3004-I/ST is suitable for thermistor, RTD, or temperature-transducer monitoring when multiple temperature points must be converted through a dedicated ADC. Its four analog channels allow several sensing branches to share one converter, while differential operation can support bridge-based sensor arrangements when the common-mode voltage is permitted. A 10-bit result and 2.78 µs maximum conversion time support practical thermal-control loops, while the 5 nA typical standby current helps preserve battery life between measurements. The final accuracy also depends on sensor excitation, input filtering, and reference-voltage stability.
推薦
Battery Voltage Monitoring
The MCP3004-I/ST can monitor a battery-derived voltage on one of its four analog inputs, enabling a host processor to track state of charge or detect an abnormal supply condition. The ADC accepts analog signals up to 5 V, and the 10-bit conversion provides a practical indication of pack voltage when the source is divided appropriately into the supported input range. Its 200 kSPS maximum rate permits more frequent sampling than many battery systems require, while 5 nA typical standby current avoids unnecessary load. Accurate production measurements still require resistor tolerance, divider topology, and reference error to be included in the budget.
推薦
Potentiometer and Control Input
MCP3004-I/ST converts resistive-divider positions into digital values for volume controls, calibration knobs, and analog set-point inputs. Four channels allow a control panel to monitor several independent adjustments without multiplexing the SPI bus externally. Its 10-bit resolution and 200 kSPS maximum rate provide rapid updates for user interfaces, while differential inputs may support properly conditioned bridge sensors rather than simple grounded wipers. Care is needed because the source impedance and sampling network interact with the internal sample-and-hold behavior, so long traces, high source resistance, and noisy adjacent routing can reduce repeatability.
推薦
Data Acquisition and Embedded Control
MCP3004-I/ST provides a compact, dedicated conversion front end for embedded systems that need analog measurement independent of the host MCU. A 200 kSPS maximum sampling rate supports signal acquisition beyond slow control-only rates, and four channels provide enough parallelism for common sensor suites. The SPI interface allows straightforward integration with a microcontroller such as the MSP430F149IPAGR. Because the part is not an MCU, it does not replace program memory, timers, or communications; it complements them by delivering consistent 10-bit measurements. PCB partitioning, reference bypassing, and analog-ground return paths remain central to achieving predictable results.
推薦
Portable and Wearable Sensing
MCP3004-I/ST is suitable for portable sensing systems that periodically measure analog sensors and then return to a low-power state. The 5 nA typical standby current is especially valuable in duty-cycled designs, while 425 µA typical active current limits the penalty during acquisition. The four-channel arrangement can support resistive, capacitive, or other conditioned sensor inputs, and the 10-bit result is adequate for many slow biomedical, fitness, and environmental measurements. Low-power operation does not remove analog-design constraints: leakage, resistor networks, reference impedance, and the input-source capacitance must be evaluated for the intended sampling interval.
推薦
推薦產品摘要
工程參考資料，適用於 MCP3004-I/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 | MCP3004T-I/ST | MCP3004-I/STVAO | MCP3004T-I/STVAO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Maximum Sampling Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Conversion Architecture | SAR | SAR | SAR | SAR |
| Differential Input Channels | 2 channels | 2 channels | 2 channels | 2 channels |
主要差異化特點
- Four-channel integration reduces external analog multiplexing (對比MCP3004T-I/ST)
- High acquisition speed for a compact 10-bit SAR ADC (對比MCP3004-I/STVAO)
- Low standby current supports duty-cycled embedded measurement (對比MCP3004T-I/STVAO)
設計說明
Keep analog input traces, the reference connection, and the exposed supply bypassing area compact and away from SPI clock and data routes. Follow the manufacturer layout and grounding guidance when defining the board stack-up. Because the MCP3004-I/ST performs conversion in only 2.78 µs, board-level settling and return-path control can still dominate short-cycle measurements even when the IC’s conversion rate is adequate.
Treat the reference source as a precision input rather than an unrestricted supply node. Use the manufacturer-specified reference decoupling and verify that the reference remains within its permitted range under startup, temperature, and load conditions. Because this source does not provide the complete reference-voltage or input-impedance tables, do not select divider values or source impedances until those limits have been checked in the manufacturer datasheet.
Use the supplied operating limits to distinguish the 5 V maximum analog input rating from the permitted supply and reference ranges; these are not interchangeable. Confirm the exact digital and analog supply combinations before schematic release. The typical currents are 425 µA active and 5 nA standby, so power budgeting should also include the load presented by the reference network, pull resistors, and external signal-conditioning circuitry.
Do not assume that a similarly named Microchip ordering code is a drop-in replacement without checking its numbered pinout, SPI timing, qualification grade, and operating-temperature limits. MCP3004T-I/ST and MCP3004-I/STVAO are listed as 14-pin TSSOP alternatives with the same 10-bit resolution and 200 kSPS rate, but matching headline specifications does not replace a full manufacturer-document review.
合規資訊
The supplied excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The -I ordering suffix indicates an industrial temperature-grade option, but the exact temperature range and any automotive qualification were not included; no AEC-Q100 qualification is claimed.
