Analog Devices Inc./Maxim Integrated MAX1110CAP+

Overview

The MAX1110CAP+ from Maxim Integrated is an 8-bit, 8-channel successive-approximation analog-to-digital converter (ADC) with integrated track/hold, 2.048V internal reference, SPI/QSPI/MICROWIRE-compatible serial interface, and software-configurable unipolar/bipolar and single-ended/differential input modes. It operates from a single 2.7V to 5.5V supply, draws only 85µA at 50ksps, and targets portable data loggers and hand-held measurement devices requiring low power and multichannel sampling.

For engineers reviewing the MAX1110CAP+ datasheet, MAX1110CAP+ pinout, MAX1110CAP+ application, or MAX1110CAP+ equivalent, key selection considerations include its 8-channel single-ended / 4-channel differential input flexibility, 1µs track/hold acquisition time, ±1 LSB total unadjusted error, internal clock option for interrupt-driven systems, and SSOP-20 package compatibility with space-constrained embedded designs.

Technical Context

The MAX1110CAP+ implements a capacitor-based successive-approximation register (SAR) architecture with an integrated track/hold circuit that acquires input signals in ≤1µs and supports up to 50ksps sampling using either its internal 400kHz clock or an external serial clock up to 2MHz. Its analog front-end allows software-selectable channel configuration via an 8-bit control byte, enabling dynamic reconfiguration between eight single-ended inputs or four differential pairs (CH0–CH1, CH2–CH3, CH4–CH5, CH6–CH7).

Conversion results are output in MSB-first format over a 4-wire serial interface compatible with SPI (CPOL=0, CPHA=0), QSPI, and MICROWIRE standards. The SSTRB signal provides precise end-of-conversion timing-low-active in internal clock mode, pulse-active in external clock mode-and supports interrupt-driven microcontroller operation without polling overhead.

Key Specifications

Pinout & Package

The MAX1110CAP+ is housed in a 20-pin shrink small-outline package (SSOP) with exposed pad, optimized for thermal performance and board-space efficiency in portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.

Compared with ADS7822U and MAX1113CAP+, the MAX1110CAP+ uniquely delivers 8-channel flexibility with integrated reference and bipolar operation in the same SSOP-20 footprint-enabling compact, low-component-count designs where input count and configurability are critical.

Availability

The MAX1110CAP+ is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and medical instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX1110CAP+ 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 portable applications.

The MAX1110CAP+ belongs to Maxim's low-power serial ADC product line, designed specifically for battery-operated and space-constrained systems needing multichannel, software-configurable analog digitization with minimal external components.

FAQ

What is the maximum sampling rate supported by the MAX1110CAP+?

The MAX1110CAP+ supports up to 50ksps when using its internal clock or an external serial clock. In external clock mode, the conversion rate is determined by the SCLK frequency and the 10-clock-per-conversion cycle requirement - for example, a 500kHz SCLK yields 50ksps. At lower clock frequencies, the device remains functional down to 50kHz, though conversion time increases proportionally.

Does the MAX1110CAP+ require an external reference voltage?

No, the MAX1110CAP+ includes an internal 2.048V reference with ±0.8ppm/°C temperature coefficient, eliminating the need for an external reference in most applications. However, it also supports external reference voltages from 1V to VDD applied at the REFIN pin, allowing users to optimize full-scale range or improve absolute accuracy with a higher-precision source.

How many analog input channels does the MAX1110CAP+ support?

The MAX1110CAP+ supports eight analog input channels (CH0–CH7). These can be configured in software as eight single-ended inputs referenced to COM, or as four pseudo-differential pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7), providing flexible signal acquisition for diverse sensor topologies.

What serial interface standards is the MAX1110CAP+ compatible with?

The MAX1110CAP+ features a 4-wire serial interface fully compatible with SPI (with CPOL=0, CPHA=0), QSPI, and MICROWIRE standards. Its DIN, SCLK, and CS pins tolerate voltages up to 5.5V regardless of VDD, enabling seamless integration with both 3V and 5V microcontrollers without level-shifting circuitry.

What is the purpose of the SSTRB pin on the MAX1110CAP+?

The SSTRB (serial strobe) pin on the MAX1110CAP+ provides a hardware timing signal indicating conversion completion. In internal clock mode, it goes low at conversion start and high at completion (25µs typical pulse width). In external clock mode, it pulses high for two SCLK periods before the MSB appears on DOUT - enabling efficient interrupt-driven data reads without polling.