Analog Devices Inc./Maxim Integrated MAX187CCWE+

Overview

MAX187CCWE+ from Maxim Integrated is a +5V, low-power, 12-bit successive-approximation analog-to-digital converter (ADC) with integrated track/hold, on-chip 4.096V buffered reference, and SPI-/QSPI-/MICROWIRE-compatible 3-wire serial interface. It delivers 75ksps throughput, ±½ LSB integral nonlinearity (A-grade), 1.5µs acquisition time, and operates in 0°C to +70°C industrial temperature range. It is used in portable data logging and isolated sensor interfaces where space, power, and precision are constrained.

For engineers reviewing the MAX187CCWE+ datasheet, MAX187CCWE+ pinout, MAX187CCWE+ application, or MAX187CCWE+ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-chain support details specific to this SO-16 variant.

Technical Context

The MAX187CCWE+ implements an 8.5-clock-cycle SAR architecture with internal track/hold and monolithic bandgap reference trimmed to 4.096V ±0.5%. Its unipolar input accepts 0–VREF (0–4.096V) analog signals, digitized at 75ksps using an external SCLK up to 5MHz. Conversion is initiated by CS falling edge; EOC is signaled by DOUT high transition after 5.5–8.5µs.

It supports two reference modes: internal (enabled by pulling SHDN high) and external (SHDN floating). The 3-wire serial interface outputs MSB-first data - one leading '1' bit followed by 12 data bits - synchronized to SCLK falling edges, requiring ≥13 clock cycles for full readout. Power-down mode reduces supply current to ≤10µA.

Key Specifications

Pinout & Package

MAX187CCWE+ is housed in a 16-pin wide SO package (SOIC-W) with exposed pad (not electrically connected). Pin functions are validated per Maxim's official pin description table and functional diagram.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit serial ADC applications.

Compared with ADS7822U and MAX11131AUT+T, the MAX187CCWE+ uniquely combines internal 4.096V reference, integrated track/hold, 75ksps throughput, and multi-standard serial compatibility in a single 16-pin SO package - making it optimal for cost-sensitive, battery-operated, or space-constrained industrial sensing where ease of integration and temperature-stable accuracy are prioritized over raw speed or ultra-low voltage operation.

Availability

MAX187CCWE+ is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor nodes, and isolated industrial data acquisition systems requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.

Supply support for MAX187CCWE+ 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.

The MAX187CCWE+ belongs to Maxim's precision data-conversion product line, designed specifically for low-power, space-constrained applications demanding calibrated accuracy, integrated references, and simplified digital interfacing without external support components.

FAQ

What is the reference voltage configuration of the MAX187CCWE+?

The MAX187CCWE+ features an on-chip 4.096V buffered reference that is laser-trimmed to ±0.5% initial accuracy and ±30ppm/°C temperature coefficient. It is enabled by pulling the SHDN pin high. When SHDN is left floating, the internal reference is disabled and the device accepts an external reference (2.5V to VDD) at the REF pin. This dual-mode flexibility makes the MAX187CCWE+ adaptable to both self-contained and system-referenced designs.

Does the MAX187CCWE+ require an external clock for conversion?

No - the MAX187CCWE+ contains an on-chip clock for the SAR conversion process. An external SCLK is only required to read out the result via the serial interface. The internal conversion completes in 5.5–8.5µs regardless of SCLK activity. This decouples conversion timing from host processor clocking, enabling deterministic sampling and flexible data retrieval at any SCLK rate up to 5MHz.

What is the function of the SHDN pin on the MAX187CCWE+?

The SHDN pin on the MAX187CCWE+ serves three distinct roles: pulled high → enables internal 4.096V reference; left floating → disables internal reference and allows external reference use; pulled low → places the device in shutdown mode with supply current ≤10µA. This triple functionality eliminates the need for separate reference-enable and power-down control lines, simplifying system-level power management.

Can the MAX187CCWE+ interface directly with an STM32 microcontroller?

Yes - the MAX187CCWE+ is fully compatible with STM32 SPI peripherals when configured with CPOL = 0 and CPHA = 0. Its 3-wire interface (CS, SCLK, DOUT) requires no additional level-shifting or protocol translation. The device outputs a leading '1' bit followed by 12 MSB-first data bits, which STM32 HAL drivers can read using standard SPI receive routines with appropriate timing delays or DOUT edge detection for EOC.

What is the maximum analog input frequency supported by the MAX187CCWE+?

The MAX187CCWE+ has a 4.5MHz small-signal input bandwidth and 75ksps sampling rate, permitting direct digitization of signals up to 37.5kHz (Nyquist limit). For higher-frequency inputs (e.g., RF or ultrasonic), undersampling techniques can be applied - provided anti-alias filtering is implemented to suppress out-of-band energy before the AIN pin. The 1.5µs acquisition time and 16pF input capacitance impose practical limits on source impedance (ideally <5kΩ) for full AC performance.