MCP3202-BI/P - 12-Bit Dual-Channel SPI ADC | Microchip
MPN: MCP3202-BI/P ✓ AktifMCP3202-BI/P Genel Bakış
What is a SAR ADC? A successive-approximation-register analog-to-digital converter samples an analog voltage and performs a sequence of internal comparisons to produce a digital code. The MCP3202 combines that conversion method with a sample-and-hold circuit and a serial interface, making it a compact data-conversion block for embedded control systems. Its two inputs can be configured as one pseudo-differential pair or as two single-ended channels according to the Microchip product documentation.
Key features include 12-bit resolution, two analog inputs, SPI communication, and low power consumption. According to the manufacturer datasheet, typical standby current is 500 nA and typical active current is 375 µA. The interface supports SPI modes 0,0 and 1,1. The conversion-rate advantage is most pronounced at 5 V, where the 100 ksps rating is twice the 50 ksps rating available at the 2.7 V minimum supply.
The SAR architecture produces one conversion result per sampled input, making the MCP3202 suitable for slow-to-medium-speed instrumentation rather than high-frequency waveform capture. Its simple serial protocol requires chip select, clock, data input, and data output connections, allowing it to share an SPI bus with other compatible peripherals when chip-select control is managed correctly.
Typical uses include industrial sensor acquisition, potentiometer measurements, battery or power-supply monitoring, and embedded control systems. The MCP3202 is particularly useful where a microcontroller lacks an adequate analog input or where higher-resolution external measurement is required. Its low standby current also suits battery-operated equipment that spends substantial time between measurements.
Designers should route analog inputs carefully, use a clean and stable reference supply, and observe the manufacturer’s input-voltage limits relative to the analog and digital supply levels. The SPI clock and chip-select signals should be controlled so that conversion timing and data framing remain deterministic. Because the MCP3202-BI/P is supplied in a PDIP package, it is most appropriate for through-hole designs, prototypes, and industrial assemblies rather than compact surface-mount layouts.
This page consolidates the verified manufacturer specifications, sourced distributor listings, package information, and drop-in replacement considerations into a design-oriented reference for engineers evaluating the MCP3202-BI/P.
Drop-in alternatifler için MCP3202-BI/P — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller MCP3202-BI/P (aynı form faktörü ve ayağa oturma) — farklı olan Package, Differential Nonlinearity, Input Type, Integral Nonlinearity, Interface.
MCP3202-CI/P
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →MCP3202-BI/P
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →MCP3204-BI/P
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →MCP3201-BI/P
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Veri Şablonunu Görüntüle →MCP3202-BI/P Maksimum Değerlendirmeler & Elektriksel Özellikler
| Çözünürlük | 12 bit |
| Architecture | Successive approximation register (SAR) |
| Input Channels | 2 single-ended inputs or 1 pseudo-differential input pair |
| Analog Input Type | Single-ended or pseudo-differential |
| Arayüz | SPI serial interface |
| Supported SPI Modes | Modes 0,0 and 1,1 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Maximum Conversion Rate at 5 V | 100 ksps |
| Maximum Conversion Rate at 2.7 V | 50 ksps |
| Typical Standby Current | 500 nA |
| Typical Active Current | 375 µA |
| Sample-and-Hold Circuitry | On chip |
| Paket | 8-PDIP, 0.300 in |
| Montaj Türü | Through hole |
| Differential Nonlinearity | ±1 LSB maximum |
| Integral Nonlinearity | ±2 LSB maximum |
MCP3202-BI/P Pin Yapısı
| Pin 1 | CS — Chip-select input |
| Pin 2 | DIN — Serial data input |
| Pin 3 | DOUT — Serial data output |
| Pin 4 | SCLK — Serial clock input |
| Pin 5 | GND — Ground reference |
| Pin 6 | VREF+ — Positive reference input |
| Pin 7 | VIN- — Negative analog input |
| Pin 8 | VIN+ — Positive analog input |
Tipik Uygulamalar
MCP3202-BI/P için uygundur 6 uygulamas: Industrial Sensor Acquisition, Battery and Power-Supply Monitoring, Precision Potentiometer Positioning, Embedded Data Logging, Communication and Network Equipment, Audio and Control Signal Conditioning.
Industrial Sensor Acquisition
The MCP3202-BI/P is appropriate for embedded acquisition of slow and medium-speed industrial sensor signals because it combines 12-bit resolution with two programmable inputs and rates up to 100 ksps at 5 V. The two channels can represent separate single-ended measurements or form one pseudo-differential pair. A microcontroller can initiate a conversion through SPI and retrieve the 12-bit result, while integrated sample-and-hold circuitry captures the input. For temperature, pressure, and position sensors, 100 ksps is substantially above the required update rate, allowing time for averaging and filtering. The designer should still provide conditioned inputs, a stable reference, and a low-noise analog ground path.
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Battery and Power-Supply Monitoring
The MCP3202-BI/P can monitor battery voltage, load feedback, or a divided power-supply output where the system requires measurements more precise than its internal ADC. Its 2.7 V to 5.5 V operating range supports both 3.3 V and 5 V embedded systems, and its 375 µA typical active current is suitable for periodic monitoring. The 12-bit conversion result supports threshold decisions and telemetry, while the 500 nA standby current helps preserve battery life between measurements. In this use, reference-voltage accuracy directly affects measurement confidence, so the reference source and input divider should be designed for the required tolerance.
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Precision Potentiometer Positioning
The MCP3202-BI/P is well suited to reading resistive position sensors because it provides 12-bit resolution and an integrated sample-and-hold circuit in an 8-PDIP package. One channel can measure a potentiometer wiper voltage referenced to ground, while the second channel can provide a complementary or reference measurement. The available throughput of up to 100 ksps at 5 V allows the controller to update motion or position more frequently than the mechanical sensor requires. For stable results, keep the wiper connection short, bypass the reference appropriately, and avoid routing the high-impedance signal close to SPI clock traces.
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Embedded Data Logging
The MCP3202-BI/P supports compact embedded data loggers that need two measured inputs but do not require a high-resolution mixed-signal MCU. A host controller can configure the pseudo-differential or single-ended channel arrangement, initiate conversions through SPI, and periodically store scaled results in nonvolatile memory. The SAR ADC's simple command structure is easy to integrate with common microcontroller peripherals. Its low typical standby current of 500 nA is beneficial for remote or battery-operated logging equipment. Designers should pace samples according to the conversion rate and include calibration for reference drift, offset, and sensor nonlinearity.
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Communication and Network Equipment
The MCP3202-BI/P can monitor analog supervision points in communication equipment, such as supply rails, temperature sensors, or optical-module status signals. The 12-bit SAR conversion provides more resolution than many basic supervisor thresholds, while the SPI interface allows efficient sharing of a bus with other peripherals. Conversion rates up to 100 ksps at 5 V support fast monitoring loops, although the actual update rate will usually be much lower. For network-card and line-card designs, analog and digital grounds should meet at a controlled point, and the reference voltage should remain stable during each conversion.
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Audio and Control Signal Conditioning
The MCP3202-BI/P can acquire slow control, feedback, or monitoring voltages in audio equipment, provided the signal bandwidth fits its SAR conversion characteristics. Two single-ended inputs permit simultaneous use for a control command and a feedback level, or the pins can be used as a pseudo-differential pair. A 5 V operating point supports the 100 ksps rate, which is useful for fast envelope or control-loop feedback. Because the converter is not a high-resolution audio ADC, precision audio paths require dedicated converters; MCP3202-BI/P is better suited to supervisory and control signals than to full-band acoustic capture.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: MCP3202-BI/P — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | MCP3202-CI/P | MCP3202-BI/P | MCP3204-BI/P | MCP3201-BI/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-PDIP, 0.300 in | 8-PDIP, 0.300 in | 8-PDIP, 0.300 in | 8-PDIP, 0.300 in | 8-PDIP, 0.300 in |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Input Configuration | 2 single-ended inputs or 1 pseudo-differential pair | 2 single-ended inputs or 1 pseudo-differential pair | 2 single-ended inputs or 1 pseudo-differential pair | 4 single-ended inputs | 1 single-ended input |
| Interface | SPI serial interface | SPI serial interface | SPI serial interface | SPI serial interface | SPI serial interface |
| 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 |
| Maximum Conversion Rate at 5 V | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Typical Active Current | 375 µA | 375 µA | 375 µA | 375 µA | 375 µA |
| Typical Standby Current | 500 nA | 500 nA | 500 nA | 500 nA | 500 nA |
| Differential Nonlinearity | ±1 LSB maximum | ±1 LSB maximum | ±1 LSB maximum | ±1 LSB maximum | ±1 LSB maximum |
| Integral Nonlinearity | ±2 LSB maximum | ±2 LSB maximum | ±2 LSB maximum | ±2 LSB maximum | ±2 LSB maximum |
Ana Farklılayıcılar
- Two-channel flexibility in an 8-PDIP package (karşılaştırma:MCP3201-BI/P)
- Lower channel count than the four-channel family option (karşılaştırma:MCP3204-BI/P)
- Supply-dependent throughput with low standby consumption (karşılaştırma:ADS1015)
Tasarım Notları
Keep the MCP3202-BI/P analog inputs and reference connection compact and away from SCLK, CS, and other fast digital traces. The verified architecture uses a pseudo-differential or single-ended input arrangement, so high-impedance sensor wiring should be minimized to reduce pickup and acquisition error. Connect the analog and digital ground references in the arrangement specified by the manufacturer datasheet and place bypass capacitance close to the supply pins.
The device supports SPI modes 0,0 and 1,1, so the host controller must use one of those clocking conventions and assert CS for the complete command and conversion sequence. Keep SCLK, DIN, and DOUT routed together where practical and avoid long stubs around the PDIP device. Because SCLK can be much faster than the ADC conversion rate, the software must observe the required acquisition and sample timing rather than treating every clock edge as a completed conversion.
Do not assume that a same-family alternative is automatically interchangeable. The verified listings identify MCP3202-CI/P, MCP3201-BI/P, and MCP3204-BI/P as related options, but MCP3201-BI/P has one channel instead of two and MCP3204-BI/P has four. Confirm the exact pinout, grade-specific temperature range, qualification status, and firmware channel mapping in the manufacturer datasheet before releasing a substitution.
The MCP3202-BI/P accepts 2.7 V to 5.5 V, but its maximum throughput changes with supply: 50 ksps at 2.7 V versus 100 ksps at 5 V. Design the reference voltage and analog input range for the selected supply, and do not exceed the absolute or operating input limits shown in the datasheet. Low-power systems can benefit from the typical 500 nA standby current, provided the host enables the ADC only around measurement periods.
Uyumluluk Bilgisi
The supplied verified web results do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals compliance. AEC-Q100 is marked not applicable because no automotive qualification evidence was supplied for this exact ordering code.
