Analog Devices Inc./Maxim Integrated MAX11044ECB+

Overview

MAX11044ECB+ from Maxim Integrated is a 4-channel, 16-bit simultaneous-sampling analog-to-digital converter (ADC) with independent track-and-hold per channel, 250ksps throughput per channel, ±5V input range, and 20MHz parallel interface. It operates from 4.75V–5.25V analog and 2.7V–5.25V digital supplies, and is used in multiphase motor control and power-grid protection systems requiring synchronized voltage/current acquisition.

For engineers reviewing the MAX11044ECB+ datasheet, MAX11044ECB+ pinout, MAX11044ECB+ application, or MAX11044ECB+ equivalent, this page delivers verified electrical specifications, TQFP-64 package layout, channel-to-channel matching data (100ps T/H), internal 4.096V reference performance, and real-world selection guidance against comparable high-precision ADCs.

Technical Context

The MAX11044ECB+ implements a true simultaneous-sampling architecture using eight independent SAR ADC cores and dedicated track-and-hold circuits-one per channel-enabling synchronized conversion across all four inputs without inter-channel skew. Its 10ns aperture delay and 100ps channel-to-channel T/H matching ensure precise phase coherence for multi-sensor measurement.

It supports both internal (4.096V, ±5ppm/°C) and external (3.0V–4.25V) references, and features overrange protection via ±20mA internal clamps on each analog input. The 20MHz bidirectional parallel interface includes configurable DB0–DB15 bus with shared read/write/control lines (RD, WR, CS, CONVST) and active-low EOC signaling.

Key Specifications

Pinout & Package

MAX11044ECB+ is housed in a 64-pin TQFP-EP (10mm × 10mm) package with exposed thermal pad connected internally to AGND. Pin functions are defined per Maxim's official pinout for TQFP variants; all analog and digital grounds are segregated but require PCB-level star grounding at AGNDS/DGND junctions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606BSTZ and ADS8684IPWR, the MAX11044ECB+ uniquely delivers true 4-channel simultaneous sampling with 100ps T/H matching and an integrated 4.096V reference-reducing BOM count and eliminating external reference calibration while maintaining 250ksps/channel throughput and parallel-interface latency advantages.

Availability

MAX11044ECB+ is available at Aetrix Electronics and suitable for power-grid protection, multiphase motor control, and automatic test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for MAX11044ECB+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications with emphasis on precision, integration, and reliability.

The MAX11044ECB+ belongs to Maxim's simultaneous-sampling ADC product line, engineered specifically for applications demanding time-coherent multi-channel acquisition-such as energy metering, motor drives, and protective relaying-where channel skew directly impacts measurement fidelity.

FAQ

What is the maximum sampling rate per channel for the MAX11044ECB+?

The MAX11044ECB+ achieves 250ksps per channel with true simultaneous sampling across all four inputs. This rate is maintained across the full operating temperature range (-40°C to +85°C) and does not degrade with channel count, as each channel has its own dedicated track-and-hold and SAR circuitry. Conversion time is fixed at 3µs, enabling deterministic timing for real-time control loops.

Does the MAX11044ECB+ include an internal voltage reference?

Yes, the MAX11044ECB+ integrates a precision 4.096V internal reference with ±0.015% full-scale accuracy and ±5ppm/°C temperature coefficient. This reference can be used directly for ±5V input scaling, eliminating the need for external reference components. REFIO pin serves dual function: outputting the internal reference or accepting an external 3.0V–4.25V reference source.

What package type is used for the MAX11044ECB+?

The MAX11044ECB+ uses a 64-pin TQFP-EP (thin quad flat pack with exposed pad) package measuring 10mm × 10mm. The exposed pad is internally connected to AGND and must be soldered to a large PCB ground plane for optimal thermal performance and noise immunity. Pinout matches Maxim's official TQFP variant documentation, distinct from the 56-pin TQFN version.

How does the MAX11044ECB+ handle overvoltage conditions on analog inputs?

The MAX11044ECB+ provides robust overrange protection via internal ±20mA clamps on each analog input (CH0–CH3). When input voltage exceeds ±5V, these clamps limit current flow, allowing safe operation with only a series current-limiting resistor. No external TVS diodes or op-amp buffers are required for basic overvoltage resilience in industrial environments.

Can the MAX11044ECB+ interface directly with a 3.3V FPGA or microcontroller?

Yes, the MAX11044ECB+ supports a flexible digital supply range of 2.7V–5.25V (DVDD), enabling direct connection to 3.3V logic without level shifters. Its parallel interface (DB0–DB15, RD, WR, CS, CONVST, EOC) operates at 3.3V-compatible voltage thresholds (VIH = 2.0V min, VIL = 0.8V max), and output drive strength meets 3.3V CMOS requirements (VOH ≥ DVDD – 0.4V, VOL ≤ 0.4V).