Analog Devices Inc./Maxim Integrated MAX1110EAP+T

Overview

MAX1110EAP+T 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–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 MAX1110EAP+T datasheet, MAX1110EAP+T pinout, MAX1110EAP+T application, or MAX1110EAP+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in solar-powered remote systems and medical instruments, and two validated alternative ADCs with documented functional and application-level differences.

Technical Context

The MAX1110EAP+T implements a successive-approximation register (SAR) architecture with an on-chip 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 8-channel single-ended or 4-channel differential operation via an 8-bit control byte.

Conversion results are output in MSB-first format over a 4-wire serial interface; SSTRB provides end-of-conversion strobe signaling, and SHDN enables hardware-triggered 10µA shutdown. Input full-scale range is set by the internal 2.048V reference (±0.3% typical accuracy) or an external 1V–VDD reference, supporting both unipolar (0V to VREFIN) and bipolar (±VREFIN/2) configurations.

Key Specifications

Pinout & Package

The MAX1110EAP+T is housed in a 20-pin SSOP package (body size 7.2mm × 5.3mm, 0.65mm pitch), optimized for compact PCB layouts 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 MCP3008-I/P, the MAX1110EAP+T uniquely combines 8-channel flexibility, bipolar/differential configurability, integrated 2.048V reference, and hardware EOC signaling - making it optimal for compact, low-power, interrupt-driven data acquisition where channel count and timing determinism are critical.

Availability

MAX1110EAP+T is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and solar-powered remote systems requiring stable component supply across extended temperature ranges (-40°C to +85°C) and long production lifecycles.

Supply support for MAX1110EAP+T 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 demanding industrial, medical, and portable applications.

The MAX1110EAP+T belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-operated instrumentation requiring multichannel sampling, integrated references, and minimal active current consumption.

FAQ

What is the maximum sampling rate supported by the MAX1110EAP+T?

The MAX1110EAP+T achieves up to 50ksps using its internal 400kHz clock or an external serial clock up to 2MHz. At 50ksps, total unadjusted error remains ±1 LSB (max), and supply current is 85µA. For reliable operation, the conversion must complete within 1ms to prevent track/hold droop - a constraint automatically satisfied at ≥50kHz SCLK in external clock mode.

Does the MAX1110EAP+T require an external reference voltage?

No, the MAX1110EAP+T includes a factory-trimmed 2.048V internal reference with ±0.3% typical accuracy, eliminating the need for external components in most applications. However, it also supports external references from 1V to VDD applied at the REFIN pin - useful when matching system-level reference standards or extending full-scale range beyond 2.048V.

How does the MAX1110EAP+T handle differential input configurations?

The MAX1110EAP+T supports pseudo-differential operation across four channel pairs: CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. In differential mode, the device samples the voltage difference between selected IN+ and IN− inputs while maintaining IN− stability within ±0.5 LSB. A 0.1µF capacitor from IN− to AGND is recommended to suppress common-mode noise and ensure accurate results.

What is the function of the SSTRB pin on the MAX1110EAP+T?

The SSTRB (serial strobe) pin on the MAX1110EAP+T provides hardware end-of-conversion signaling. In internal clock mode, it goes low at conversion start and high upon completion (25µs typical pulse width). In external clock mode, it pulses high for two SCLK periods before MSB output. This enables interrupt-driven firmware, reducing CPU polling overhead and improving system timing determinism.

Can the MAX1110EAP+T operate from a 3.3V supply while interfacing with a 5V microcontroller?

Yes, the MAX1110EAP+T supports 2.7V–5.5V VDD operation and features 5.5V-tolerant digital inputs (CS, SCLK, DIN), allowing direct connection to 5V microcontrollers without level shifters. Its digital outputs (DOUT, SSTRB) swing rail-to-rail with VDD, so a 3.3V-supplied MAX1110EAP+T outputs 0V/3.3V logic compatible with 3.3V MCU inputs - ensuring robust interoperability across mixed-voltage systems.