Analog Devices Inc./Maxim Integrated MAX1169CEUD+

Overview

MAX1169CEUD+ from Maxim Integrated is a low-power, 16-bit successive-approximation analog-to-digital converter (ADC) with I²C-compatible 2-wire serial interface, internal 4MHz clock, and +4.096V reference. It delivers 58.6ksps sampling rate, ±2 LSB INL, and operates from +4.75V to +5.25V analog supply with AutoShutdown™ reducing current to <50µA at 1ksps - ideal for battery-powered medical instruments and portable test equipment.

For engineers reviewing the MAX1169CEUD+ datasheet, MAX1169CEUD+ pinout, MAX1169CEUD+ application, or MAX1169CEUD+ equivalent, key selection considerations include unipolar single-input operation, 14-pin TSSOP package compatibility, internal vs. external reference flexibility (1V to V_AVDD), and high-speed I²C timing support up to 1.7MHz.

Technical Context

The MAX1169CEUD+ employs SAR architecture with integrated track-and-hold and switched-capacitor DAC, acquiring input signals over two SCL cycles before conversion. Its internal 4MHz oscillator drives conversion timing, and SCL stretching ensures synchronous data readout after conversion completion.

It supports dual-reference operation: internal +4.096V reference (±35ppm/°C TC) or externally applied reference (1V to V_AVDD). Four address-select inputs (ADD0–ADD3) enable up to 16 devices on one I²C bus, with slave address MSBs factory-set to 011 and LSBs programmable via ADD pins.

Key Specifications

Pinout & Package

MAX1169CEUD+ is housed in a 14-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, optimized for space-constrained PCB layouts and thermal performance in portable applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit I²C ADC applications.

Compared with ADS1115IDGSR and AD7998BRUZ-0, the MAX1169CEUD+ uniquely combines 16-bit resolution, 58.6ksps I²C-native sampling, internal clock, and ultra-low shutdown current - making it optimal for space- and power-constrained portable instrumentation where timing autonomy and precision are non-negotiable.

Availability

MAX1169CEUD+ is available at Aetrix Electronics and suitable for hand-held portable applications, medical instruments, and battery-powered test equipment requiring stable component supply and long-term manufacturability.

Supply support for MAX1169CEUD+ 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 communications applications.

The MAX1169CEUD+ belongs to Maxim's high-accuracy, low-power SAR ADC product line - engineered specifically for portable and remote sensing systems where resolution, power efficiency, and I²C simplicity are critical design constraints.

FAQ

What is the maximum sampling rate supported by the MAX1169CEUD+?

The MAX1169CEUD+ achieves a maximum sampling rate of 58.6ksps when operating in I²C high-speed mode (1.7MHz SCL). This rate is enabled by its internal 4MHz conversion clock and SCL stretching mechanism, which holds the clock low during conversion to guarantee timing integrity. In fast mode (400kHz SCL), the throughput drops to 19ksps - a trade-off between speed and bus compatibility with legacy controllers.

Does the MAX1169CEUD+ require an external crystal or oscillator?

No, the MAX1169CEUD+ does not require an external crystal or oscillator. It integrates a precision 4MHz internal oscillator that drives the SAR conversion process independently of the I²C clock. This eliminates external timing components, reduces BOM cost and board area, and ensures consistent conversion timing across temperature and voltage variations - a key advantage over ADCs relying on host-controlled clocks.

Can the MAX1169CEUD+ operate with an external reference voltage?

Yes, the MAX1169CEUD+ supports both internal and external reference configurations. When REFADJ is tied to AVDD, the internal +4.096V bandgap reference is disabled, and an external voltage from 1V to V_AVDD can be applied to the REF pin. This enables ratiometric measurements with sensors, custom full-scale ranges, or improved stability using a precision external reference - all without changing the device's pinout or interface behavior.

How many MAX1169CEUD+ devices can share the same I²C bus?

Up to 16 MAX1169CEUD+ devices can coexist on a single I²C bus. This is achieved through four user-programmable address select inputs (ADD0–ADD3), each configured high or low to set the four LSBs of the 7-bit slave address (with MSBs factory-fixed as 011). No additional address decoding logic or bus expanders are required - simplifying multi-channel, distributed sensing architectures.

What is the significance of the 'C' grade in MAX1169CEUD+?

The 'C' in MAX1169CEUD+ denotes the commercial temperature grade (0°C to +70°C), distinct from the 'E' (–40°C to +85°C) and 'B' (–40°C to +85°C, ±2 LSB INL) grades. While the datasheet highlights MAX1169B specifications, the CEUD+ variant maintains full functional compatibility and shares the same 14-pin TSSOP package, I²C interface, and core electrical architecture - with guaranteed performance across its rated temperature range.