Analog Devices Inc./Maxim Integrated MAX11047ETN+

Overview

MAX11047ETN+ from Maxim Integrated is a 4-channel, 16-bit simultaneous-sampling analog-to-digital converter with independent track-and-hold per channel, 250ksps throughput per channel, ±0.65LSB integral nonlinearity, and 4.096V internal reference enabling 0–5V input range. It targets high-precision power-grid protection and multiphase motor control systems requiring synchronized acquisition across multiple voltage/current sensors.

For engineers reviewing the MAX11047ETN+ datasheet, MAX11047ETN+ pinout, MAX11047ETN+ application, or MAX11047ETN+ equivalent, this page delivers verified specifications, validated 56-pin TQFN pin functions, real-world use cases in vibration analysis and automatic test equipment, and two confirmed alternative parts for design flexibility.

Technical Context

The MAX11047ETN+ implements SAR architecture with dedicated T/H circuitry per channel, enabling true simultaneous sampling without inter-channel skew. Its 100ps channel-to-channel T/H matching and 10ns aperture delay ensure sub-degree phase accuracy in multi-sensor timing-critical applications.

It features a 20MHz bidirectional parallel interface with configurable CR0–CR3 pins, internal clock generation, and dual-supply operation (4.75–5.25V AVDD, 2.7–5.25V DVDD), eliminating level-shifting requirements when interfacing with 3.3V or 5V host processors.

Key Specifications

Pinout & Package

MAX11047ETN+ is housed in a 56-pin TQFN-EP package (8mm × 8mm, exposed pad). The exposed pad must be soldered to a large analog ground plane for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.

Compared with AD7606C-4 and ADS8684, the MAX11047ETN+ uniquely delivers 16-bit/250ksps simultaneous sampling in a dual-supply parallel-interface package-making it optimal for deterministic real-time control loops where timing coherence across channels is non-negotiable.

Availability

MAX11047ETN+ is available at Aetrix Electronics and suitable for power-grid protection, multiphase motor control, and vibration analysis applications requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.

Supply support for MAX11047ETN+ 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 and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing high reliability and signal integrity.

The MAX11047ETN+ belongs to Maxim's simultaneous-sampling ADC family engineered specifically for power quality monitoring, motor drive feedback, and high-channel-count data acquisition where temporal coherence across inputs is critical.

FAQ

What is the maximum sampling rate per channel for the MAX11047ETN+?

The MAX11047ETN+ achieves 250ksps (kilo-samples per second) per channel with true simultaneous sampling across all four analog inputs. This rate is sustained under full-load conditions with internal reference and 5V AVDD, enabling precise capture of 50/60Hz waveforms with over 4000 points per cycle-essential for harmonic analysis and protection relay timing.

Does the MAX11047ETN+ require an external clock source?

No, the MAX11047ETN+ includes an internal clock generator and does not require an external clock. Conversions are initiated by the CONVST signal, and timing is fully self-contained. The internal clock ensures consistent 3µs conversion time and eliminates clock distribution skew-critical for maintaining channel-to-channel synchronization in the MAX11047ETN+.

Can the MAX11047ETN+ operate with a 3.3V digital supply?

Yes, the MAX11047ETN+ supports DVDD from 2.7V to 5.25V, making it fully compatible with 3.3V logic systems. Its parallel interface outputs meet 3.3V CMOS voltage levels (VOH ≥ DVDD − 0.4V, VOL ≤ 0.4V), allowing direct connection to FPGA or microcontroller GPIOs without level shifters-simplifying board design and reducing BOM cost for the MAX11047ETN+.

How is overvoltage protection implemented on the analog inputs of the MAX11047ETN+?

The MAX11047ETN+ integrates ±20mA input clamps on each CH0–CH3 pin. When input voltage exceeds the 0–5V range, these clamps limit current flow, protecting the internal circuitry. A simple external series resistor (e.g., 100Ω) suffices to prevent damage during transients-eliminating need for discrete TVS diodes or op-amp buffers in most industrial sensor interfaces for the MAX11047ETN+.

What is the purpose of the RDC pin on the MAX11047ETN+?

The RDC pin on the MAX11047ETN+ connects to the internal reference buffer's decoupling node and must be tied to ≥80µF total capacitance (e.g., four 33µF tantalum caps) to AGND. This stabilizes the 4.096V reference under dynamic load, preventing reference droop during rapid conversions-ensuring consistent 16-bit accuracy and minimizing gain drift in the MAX11047ETN+.