Microchip Technology MCP3002-I/SN

Overview

MCP3002-I/SN from Microchip Technology is a 10-bit successive-approximation analog-to-digital converter (ADC) with on-chip sample-and-hold, SPI serial interface (modes 0,0 and 1,1), ±1 LSB INL/DNL, 200 ksps max sampling rate at 5V, and dual-channel programmable input configuration (single-ended or pseudo-differential). It serves as a precision sensor front-end in battery-powered industrial data acquisition systems.

For engineers reviewing the MCP3002-I/SN datasheet, MCP3002-I/SN pinout, MCP3002-I/SN application, or MCP3002-I/SN equivalent, key selection criteria include its 8-pin SOIC package compatibility, 2.7V–5.5V single-supply operation, low 5 nA standby current, and support for microcontroller SPI ports without external level shifting.

Technical Context

The MCP3002-I/SN implements a SAR architecture with internal 20 pF sample capacitor and 1.5-clock-cycle acquisition time. Conversion begins on the second rising CLK edge after the start bit and completes in 10 clock cycles, delivering a 10-bit straight-binary output on DOUT synchronized to CLK falling edges.

Its analog input structure supports two independent single-ended channels referenced to VSS or one pseudo-differential pair (CH0 = IN+, CH1 = IN−), where IN− is constrained to ±100 mV around VSS to enable common-mode noise rejection while maintaining monotonicity and no missing codes over temperature.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), 150 mil width, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with MCP3002-I/P, the MCP3002-I/SN offers identical performance in a smaller, surface-mount SOIC package optimized for volume production; compared with ADS7822U, it trades 2-bit resolution for simplified single-supply operation and lower system-level design overhead.

Availability

MCP3002-I/SN is available at Aetrix Electronics and suitable for industrial sensor interface, process control, battery-operated data loggers, and portable instrumentation requiring stable component supply and long-term manufacturing continuity.

Supply support for MCP3002-I/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog, and mixed-signal ICs for embedded control applications.

The MCP3002 belongs to Microchip's precision analog product line, designed specifically for cost-sensitive, low-power industrial and consumer data acquisition systems requiring reliable 10-bit resolution without external support components.

FAQ

What is the maximum clock frequency supported by the MCP3002-I/SN at 3.3V operation?

The MCP3002-I/SN supports up to 2.0 MHz clock frequency at 3.3V, derived from linear interpolation between the specified 3.2 MHz maximum at 5V and 1.2 MHz at 2.7V. This ensures reliable 200 ksps sampling with sufficient timing margin for setup/hold requirements in 3.3V microcontroller systems. The MCP3002-I/SN datasheet confirms fCLK scalability across the full 2.7–5.5V supply range.

Does the MCP3002-I/SN require an external reference voltage?

No, the MCP3002-I/SN uses VDD as its internal reference voltage - no external reference is needed. This simplifies design and reduces BOM count. The LSB size scales directly with VDD (LSB = VDD / 1024), so supply regulation directly affects absolute accuracy. The MCP3002-I/SN achieves ±1 LSB INL/DNL with this integrated reference architecture.

Can the MCP3002-I/SN perform true differential measurements?

No, the MCP3002-I/SN supports only pseudo-differential mode: CH0 acts as IN+, CH1 as IN−, but IN− is limited to ±100 mV around VSS and cannot swing rail-to-rail. True differential operation (e.g., ±VREF) is not supported. The MCP3002-I/SN is intended for single-ended or common-mode-rejecting pseudo-diff applications, not bipolar differential signal acquisition.

How does the MCP3002-I/SN handle input leakage current at elevated temperatures?

At +85°C, analog input leakage for the MCP3002-I/SN remains below 2 nA per channel, as characterized in Figure 2-33 of the datasheet. This low leakage preserves accuracy when interfacing with high-impedance sensors (e.g., pH electrodes or piezoelectric elements). The MCP3002-I/SN maintains specification compliance across −40°C to +85°C without derating.

Is the MCP3002-I/SN pin-compatible with other Microchip 10-bit ADCs like the MCP3001 or MCP3004?

No, the MCP3002-I/SN is not pin-compatible with the MCP3001 (6-pin SOT-23) or MCP3004 (14-pin SOIC). Its 8-pin SOIC pinout is unique to the MCP3002 family. Pin mapping differs significantly - for example, MCP3004 has dedicated VREF and separate analog/digital grounds. Migration requires PCB layout changes; the MCP3002-I/SN must be treated as a standalone footprint.