MCP3002T-I/SN - 10-Bit Dual-Channel SPI ADC | Microchip
MPN: MCP3002T-I/SN ✓ Hoạt độngMCP3002T-I/SN Tóm tắt
An analog-to-digital converter, or ADC, translates a continuously varying analog voltage into a numeric value that a microcontroller or other digital controller can process. The MCP3002 belongs to the SAR ADC family and the broader embedded data-converter hierarchy. Its dual input architecture can provide one pseudo-differential channel or two single-ended channels, making it suitable for sensor monitoring, control loops, and industrial measurement systems.
Key features include 10-bit resolution, a 200 ksample/s sampling rate, and operation from a 2.7 V supply. The on-board sample-and-hold circuitry acquires the input voltage during each conversion, while the SPI interface provides a compact means of transferring conversion results. The device is designed for low-power embedded-control applications and supports both single-ended and pseudo-differential input configurations.
Internally, the MCP3002 uses successive-approximation conversion, in which a sample-and-hold circuit captures the analog input and an internal comparator and DAC determine successive digital codes. The manufacturer describes maximum differential nonlinearity and integral nonlinearity of ±1 LSB. These characteristics are important when the ADC monitors slow or medium-speed signals where deterministic quantization behavior is more useful than very high conversion throughput.
Typical uses include industrial process monitoring, temperature and pressure sensor interfaces, potentiometer position sensing, motor or actuator feedback, and low-speed data logging. It is particularly suitable when two analog inputs and a compact serial interface are required without allocating a large number of microcontroller pins.
Designers should verify the analog input range, reference voltage, sampling time, and SPI timing against the manufacturer datasheet. The analog input must remain within the device’s specified operating limits, and the reference and bypass connections should be routed to minimize noise and conversion errors. The SOIC footprint also requires attention to exposed-pad or thermal considerations only if the selected package variant includes one.
This page combines manufacturer specifications, application guidance, package information, and drop-in-replacement assessment to support faster component selection and PCB planning.
Bộ thay thế dễ dàng lắp đặt cho MCP3002T-I/SN — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MCP3002T-I/SN (cùng hình factor và footprint) — khác nhau ở Converter Type, Resolution.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếMCP3002T-I/SN Tỷ lệ tối đa & tính chất điện
| Converter Type | Successive-approximation-register ADC |
| Độ phân giải | 10 bit |
| Number of Input Channels | 2 |
| Input Configuration | Dual single-ended or single pseudo-differential input pair |
| Sample Rate | 200 ksample/s |
| Điện áp cung cấp | 2.7 V |
| Giao diện | SPI serial interface |
| Differential Nonlinearity | ±1 LSB maximum |
| Integral Nonlinearity | ±1 LSB maximum |
| Sample-and-Hold Circuit | On board |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Screening Level | Industrial |
| Package Type | 8-pin SOIC |
| Số chân | 8 pins |
| Kiểu lắp đặt | Surface mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân MCP3002T-I/SN
| Chân 1 | CS — Chip-select input |
| Chân 2 | CH0 — Analog input channel 0 |
| Chân 3 | CH1 — Analog input channel 1 |
| Chân 4 | VREF- — Negative reference input |
| Chân 5 | VREF+ — Positive reference input |
| Chân 6 | VDD — Analog supply voltage |
| Chân 7 | DIN — Serial data input |
| Chân 8 | SCLK — Serial clock input |
Ứng dụng tiêu biểu
MCP3002T-I/SN phù hợp cho 6 Áp dụngs: Industrial Sensor Monitoring, Temperature Measurement, Pressure and Flow Control, Potentiometer Position Sensing, Data Logging and Embedded Control, Power and Battery Monitoring.
Industrial Sensor Monitoring
The MCP3002T-I/SN fits industrial sensor monitoring because it provides two analog input channels, 10-bit resolution, and a 200 ksample/s maximum sampling rate. It can digitize two conditioned pressure, position, or level signals through its SPI interface while operating from a 2.7 V supply. The pseudo-differential configuration can reduce sensitivity to common-mode noise when supported by the signal source. Design the input network to keep both channels within the converter’s operating limits, place filtering close to the device, and use a quiet, stable reference so that sensor accuracy is not degraded by quantization or reference error.
Được đề xuất
Temperature Measurement
The MCP3002T-I/SN can acquire temperature information from two conditioned analog sensor outputs, making it appropriate for thermistors, RTDs with suitable signal conditioning, or temperature-sensor amplifiers. Its 10-bit conversion resolution provides 1024 digital codes per conversion, while the 200 ksample/s capability is more than adequate for most thermal monitoring loops. The principal limitation is measurement-system accuracy rather than sampling speed. Select the reference and conditioning components for the sensor’s range, maintain stable excitation, and isolate high-impedance sensor outputs from stray capacitance so the resulting temperature readings remain repeatable.
Được đề xuất
Pressure and Flow Control
The MCP3002T-I/SN supports closed-loop monitoring of pressure or flow when the transducer produces a 2.7 V-compatible analog output. The two-channel SAR ADC can report process measurements to a controller over SPI, allowing setpoint comparisons, alarms, and actuator adjustments. The 200 ksample/s maximum rate supports fast loop updates, although practical control bandwidth will usually be limited by the sensor and signal-conditioning path. Keep the analog traces short, reference the converter ground carefully, and filter high-frequency noise without adding excessive delay to the control loop.
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Potentiometer Position Sensing
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Data Logging and Embedded Control
The MCP3002T-I/SN combines low power, two analog channels, and a serial interface for compact data loggers and embedded-control platforms. A microcontroller can sample conditioned signals on demand and store or transmit the results without requiring a parallel ADC bus. The 10-bit resolution is suitable for status monitoring and many medium-range measurements, while the 200 ksample/s maximum rate can be reduced through software timing when lower throughput is sufficient. Select the SPI clock and conversion interval to avoid overdriving the interface, and account for reference accuracy and input noise when defining the logged measurement range.
Được đề xuất
Power and Battery Monitoring
The MCP3002T-I/SN can monitor two scaled analog voltage rails in battery-powered equipment, providing a microcontroller with measurements for state-of-charge estimation, supply supervision, or load balancing. Its 2.7 V supply and dual-channel SAR architecture make it useful when compactness and low system complexity are priorities. The dividers connected to the analog inputs must keep their voltages within the ADC limits under worst-case conditions. Stable reference voltage, input filtering, and careful grounding are essential because measurement resolution beyond 10 bits can be dominated by divider tolerance and reference accuracy.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCP3002T-I/SN — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| Package | 8-pin SOIC |
| Brand | Microchip Technology |
| Converter Architecture | Successive-approximation register |
| Resolution | 10 bit |
| Input Channels | 2 |
| Maximum Sample Rate | 200 ksample/s |
| Supply Voltage | 2.7 V |
| Serial Interface | SPI |
| Operating Temperature | -40 °C to +85 °C |
| Differential Nonlinearity | ±1 LSB maximum |
Bảo phân biệt quan trọng
- Two analog inputs in an 8-pin SOIC (vsMCP3002T-I/ST)
- Compact SAR conversion for embedded control (vsMCP3002-I/ST)
- Dual-channel flexibility (vsMCP3002-I/SN)
Ghi chú thiết kế
Route CH0, CH1, VREF+, and VREF- away from switching nodes and high-current return paths. Place the converter close to the analog source and connect reference and bypass components directly to the relevant pins. The Microchip MCP3002 datasheet 21294E should be used to establish the recommended layout because trace resistance, shared copper, and ground-current paths can degrade conversion accuracy.
Treat the SPI clock as a potentially fast digital signal even though the ADC uses a serial interface. Keep SCLK and CS traces short, provide a continuous ground reference, and avoid routing the clock adjacent to sensitive analog inputs. Select series damping only after checking the actual clock rate and board impedance, since excessive resistance can prevent the controller and ADC from meeting the specified timing limits.
Decouple VDD close to the device with the capacitance and placement specified by the manufacturer. Keep the analog and digital return currents controlled, and do not assume that a generally quiet supply automatically produces an accurate conversion result. Reference stability, input-source impedance, and acquisition timing also affect accuracy, particularly when the source impedance is high relative to the converter’s sampling input.
Do not substitute another MCP3002 package suffix solely because the resolution and conversion rate match. MCP3002T-I/ST is associated with a TSSOP package, while MCP3002T-I/SN uses an 8-pin SOIC package. Confirm body width, lead pitch, pin numbering, and the pin-description table before approving a replacement, because a footprint mismatch can require a new PCB layout.
Thông tin tuân thủ
The component is identified as RoHS compliant and industrial grade. It is identified as not qualified under AEC-Q100. Current REACH, lead-free, halogen-free, and conflict-minerals declarations should be confirmed through the Request a Quote form.
