Analog Devices Inc./Maxim Integrated MAX1110CPP+

Overview

The MAX1110CPP+ from Maxim Integrated is an 8-bit, 8-channel successive-approximation analog-to-digital converter (ADC) with internal track/hold, 2.048V 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–5.5V supply, draws only 85µA at 50ksps, and targets portable data loggers, handheld test equipment, and solar-powered remote sensing nodes.

For engineers reviewing the MAX1110CPP+ datasheet, MAX1110CPP+ pinout, MAX1110CPP+ application, or MAX1110CPP+ equivalent, key selection considerations include its 8-channel single-ended / 4-channel differential input flexibility, 1µs acquisition time, ±1 LSB total unadjusted error, internal clock mode for processor-independent conversion timing, and SSOP-20 package compatibility with space-constrained embedded systems.

Technical Context

The MAX1110CPP+ implements a capacitive DAC-based successive-approximation architecture with integrated track/hold circuitry. Its analog front-end supports pseudo-differential sampling via programmable channel pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7), with COM pin establishing the zero-code reference in single-ended mode.

Conversion timing is determined either by the internal 400kHz clock or an external serial clock up to 2MHz. The 4-wire serial interface uses MSB-first, falling-edge data output (DOUT), rising-edge data input (DIN), and active-low chip select (CS), with SSTRB providing end-of-conversion strobe signaling in both clock modes.

Key Specifications

Pinout & Package

The MAX1110CPP+ is housed in a 20-pin shrink small-outline package (SSOP) with 0.65mm lead pitch, rated for 0°C to +70°C operation (C-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX1113CPE+, the MAX1110CPP+ provides double the analog input channels in a surface-mount SSOP-20 package with lower active current and integrated reference-making it optimal for compact, battery-sensitive, multi-sensor embedded systems requiring minimal external components.

Availability

The MAX1110CPP+ is available at Aetrix Electronics and suitable for portable instrumentation, solar-powered telemetry, and medical diagnostics requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.

Supply support for MAX1110CPP+ 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) designs precision analog, mixed-signal, and power-management ICs for industrial, medical, communications, and consumer applications.

The MAX1110CPP+ belongs to Maxim's low-power serial ADC product line, engineered for energy-constrained, space-limited embedded systems requiring multichannel analog sensing with minimal external components and robust digital interfacing.

FAQ

What is the maximum sampling rate supported by the MAX1110CPP+?

The MAX1110CPP+ supports up to 50ksps when using an external serial clock at 500kHz. In internal clock mode, the typical conversion time is 25µs, yielding ~40ksps effective throughput. Sampling rates above 50ksps are not specified and may degrade accuracy due to aperture jitter and track/hold settling limitations.

Does the MAX1110CPP+ require external components for stable operation?

Yes-the MAX1110CPP+ requires a 1µF ceramic capacitor from REFOUT to AGND for internal reference stability, and a 0.1µF capacitor from COM to AGND in differential mode to maintain common-mode stability within ±0.5 LSB. No external clock or reference is needed unless higher precision or different full-scale range is required.

How does the SHDN pin function on the MAX1110CPP+?

The SHDN pin on the MAX1110CPP+ is a three-level input: high-impedance enables normal operation; connection to DGND reduces supply current to ≤10µA (power-down mode); connection to VDD disables the internal reference while keeping digital circuitry active. This allows flexible power management without external logic.

Can the MAX1110CPP+ interface directly with a 5V microcontroller?

Yes-the MAX1110CPP+ CS, SCLK, and DIN pins are 5.5V-tolerant, allowing direct connection to 5V microcontrollers without level shifters. DOUT and SSTRB outputs swing rail-to-rail (0V to VDD), so a 5V µC reading the MAX1110CPP+ must operate with VDD ≥ 4.5V or use a simple voltage divider if VDD = 3.3V.

What is the purpose of the SSTRB pin on the MAX1110CPP+?

The SSTRB (serial strobe) pin on the MAX1110CPP+ provides hardware notification of conversion completion. In external clock mode, it pulses high for two SCLK periods before MSB output; in internal clock mode, it goes low at conversion start and high at completion (25µs typical). This enables interrupt-driven data reads and eliminates polling overhead in µC firmware.