MCP3208-BI/P - 12-Bit 8-Channel SAR ADC | Microchip
부품 번호: MCP3208-BI/P ✓ 활성MCP3208-BI/P 개요
An ADC is a data-conversion IC that transforms an analog voltage into a digital code. The MCP3208 belongs to the SAR ADC family within analog-to-digital converters, interface ICs, and the broader semiconductor hierarchy. Its internal sample-and-hold circuitry acquires the input voltage before successive approximation converts that voltage into a 12-bit result. The SPI interface allows sampled measurements to be transferred efficiently between the converter and a digital controller.
Key features include 12-bit conversion resolution, eight single-ended input options, and SPI communication. The verified product information identifies four differential input channels, eight single-ended inputs, one SAR conversion engine, and a 2.7 V operating supply. These characteristics make the device useful when an embedded design must monitor multiple sensors, potentiometers, or analog control signals without using a separate ADC for every channel.
The MCP3208-BI/P uses the BI temperature grade, which the verified distributor information associates with an operating range of -40°C to +85°C. Its 16-pin PDIP package favors through-hole construction, reworkability, and educational or industrial control boards where a socket or conventional plated through-hole footprint is useful. Because it is a multiplexed converter, the selected channel determines which analog input is connected to the internal sample-and-hold circuit during conversion.
Typical applications include industrial process monitoring, environmental sensor acquisition, laboratory measurement interfaces, audio and control-signal digitization, and embedded instrumentation. In these systems, the microcontroller initiates a conversion by writing channel and configuration commands over SPI, waits for the sample-and-hold and conversion sequence, and then reads the 12-bit result. A multiplexed architecture reduces package size, although channel switching means conversions are sequential rather than simultaneous.
When designing around the MCP3208-BI/P, verify the analog input range against the selected reference voltage and confirm that the SPI host uses the required clocking and chip-select behavior. Reference and analog-ground routing are critical because ADC accuracy depends on the quality of the voltage reference and the analog signal path. The 16-pin PDIP package also requires adequate through-hole spacing and mechanical clearance in compact production equipment.
This product page combines the verified Microchip and distributor specifications with package, application, sourcing, and design context. It also distinguishes verified drop-in replacements from merely similar ADC functions, preventing a functional substitute with a different package from being presented as a PCB-compatible alternative.
드롭인 대체품: MCP3208-BI/P — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MCP3208-BI/P (동일 폼 팩터 및 풋프린트) — 차이점: Package, Mounting Type, Architecture, Differential Input Channels, Input Configuration.
MCP3208-CI/P
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →MCP3208-TI/P
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MCP3208-BI/SL
✅ 드롭인가격 문의
데이터시트 보기 →MCP3208-CI/SL
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →MCP3208-BI/SS
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MCP3208-BI/P 최대 정격 & 전기적 특성
| 분해능 | 12 bit |
| Converter Architecture | Successive approximation register (SAR) |
| Single-Ended Input Channels | 8 |
| Differential Input Channels | 4 |
| Serial Interface | SPI |
| 공급 전압 | 2.7 V |
| 패키지 | 16-pin PDIP |
| 실장 유형 | Through-hole |
| Temperature Range | -40°C to +85°C |
| Sample-and-Hold Circuitry | On board |
| Conversion Engine Count | 1 |
| Low-Power Design | Low-power consumption |
| Analog Input Configuration | 4 differential or 8 single-ended inputs |
MCP3208-BI/P 16-pin pdip 핀 구성 가이드
MCP3208-BI/P(16-pin pdip 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: MCP3208-BI/P.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MCP3208-BI/P 적합 용도: 6 애플리케이션s: Industrial Process Sensor Acquisition, Environmental Monitoring, Laboratory Measurement Interface, Embedded Control and Automation, Audio and Control-Signal Digitization, Battery-Powered Portable Instrument.
Industrial Process Sensor Acquisition
The MCP3208-BI/P fits industrial process-monitoring boards that must digitize several analog sensor signals through a common SPI bus. Its eight single-ended inputs can support pressure, temperature, position, or level signals, while four differential channels can reject common-mode noise when the sensor and converter share a suitable reference arrangement. The 12-bit SAR architecture provides a compact conversion engine, and the 2.7 V supply supports low-voltage embedded systems. Because inputs are multiplexed, the controller selects a channel and performs each conversion sequentially. The -40°C to +85°C grade is appropriate for many industrial environments, although protection, isolation, calibration, and signal conditioning must be designed separately.
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Environmental Monitoring
The MCP3208-BI/P can serve as the analog front end for an environmental monitoring system combining temperature, humidity, light, soil, and air-quality sensors. The eight single-ended inputs reduce the need for separate converters when sensors produce voltages within the ADC input range. The SPI interface allows an embedded controller to retrieve samples from a compact data-acquisition board, while the 2.7 V operating supply aligns with low-voltage sensor systems. Designers should use a stable reference voltage, low-noise grounding, and appropriate input filtering because environmental sensors may be physically distant from the converter and vulnerable to coupled noise.
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Laboratory Measurement Interface
The MCP3208-BI/P is appropriate for a laboratory measurement interface that converts several low-level analog signals for display, logging, or control. Its 12-bit resolution, eight single-ended channels, and four differential input pairs support general-purpose data-acquisition tasks, while the SPI interface makes the converter straightforward to operate from a microcontroller. The 16-pin PDIP package supports through-hole prototyping and replacement in educational or serviceable instrumentation. Measurement accuracy still depends on the external voltage reference, input conditioning, calibration, and layout; the verified information does not establish a guaranteed input accuracy beyond the stated 12-bit converter resolution.
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Embedded Control and Automation
The MCP3208-BI/P is useful in embedded-control systems that monitor analog command, feedback, or actuator-sensing inputs while a microcontroller performs control functions. Its multiplexed SAR design supports eight single-ended or four differential inputs without requiring eight separate converter packages. The SPI transaction structure is practical for control loops in which the host selects a channel, initiates conversion, and reads the resulting code. The 2.7 V supply and -40°C to +85°C temperature grade support many embedded platforms. Timing-critical designs must calculate channel-selection, conversion, and data-transfer intervals from the manufacturer datasheet rather than assuming simultaneous sampling.
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Audio and Control-Signal Digitization
The MCP3208-BI/P can digitize low-bandwidth audio or control signals when the system does not require simultaneous multi-channel sampling. Its eight single-ended inputs and 12-bit resolution are useful for monitoring multiple signal levels in educational, industrial, or communications equipment, while the SPI interface provides a compact connection to a digital processor. The SAR architecture supports deterministic conversion sequencing. Designers should keep the analog input path short, place filtering and protection appropriately, and verify signal bandwidth and dynamic-range requirements against the manufacturer datasheet, since the supplied snippets do not provide complete acquisition-time or input-impedance figures.
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Battery-Powered Portable Instrument
The MCP3208-BI/P is suitable for a portable, battery-powered instrument that measures a small number of analog sensors and communicates through SPI. Its low-power-consumption design and 2.7 V operating supply are consistent with embedded acquisition systems, while the 12-bit conversion resolution provides 4096 digital code levels for a single conversion. The PDIP footprint also simplifies through-hole prototypes and serviceable builds. Low-power performance must be evaluated using the converter's complete operating-mode and current specifications from the manufacturer datasheet, because the supplied excerpts do not quantify shutdown current or conversion-current consumption.
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추천 제품 요약
엔지니어링 참조 데이터: MCP3208-BI/P — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Package | 16-pin PDIP |
| Brand | Microchip Technology |
| Resolution | 12 bit |
| Architecture | Successive approximation register (SAR) |
| Single-Ended Inputs | 8 |
| Differential Inputs | 4 |
| Serial Interface | SPI |
| Supply Voltage | 2.7 V |
| Operating Temperature | -40°C to +85°C |
주요 차별점
- Through-hole package option (vs MCP3208-BI/SL)
- Eight single-ended measurement inputs (vs MCP3204-CI/P)
- Integrated eight-channel multiplexing (vs Single-channel ADC solutions)
설계 노트
Route the SPI clock, chip-select, and data lines away from sensitive analog inputs. Keep the analog source, filtering components, MCP3208-BI/P input pins, and analog-ground return path together to minimize capacitive coupling and ground-current pickup. The 16-pin PDIP footprint provides generous component spacing, but a low-noise analog layout remains necessary because digital SPI activity can appear at the input sampling node.
Provide a stable reference and clean supply rails before expecting repeatable 12-bit conversion results. Decouple the converter close to its supply pins and treat the analog and digital return paths deliberately. The verified information confirms a 2.7 V supply but does not provide the complete reference-voltage or absolute-maximum limits, so consult the current manufacturer datasheet before selecting resistor dividers, protection devices, or bypass capacitors.
Do not treat any ADC in the same family as a drop-in replacement without checking the package and pin assignments. MCP3208-BI/SL is functionally similar but uses a 16-pin SOIC rather than the MCP3208-BI/P 16-pin PDIP footprint. Also do not assume that 12-bit resolution alone guarantees 12-bit absolute accuracy; reference quality, input conditioning, noise, calibration, and grounding determine usable measurement performance.
규정 준수 정보
The supplied verified snippets do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. No compliance status has been inferred.