Analog Devices Inc./Maxim Integrated MAX11057ECB+

Overview

The MAX11057ECB+ from Maxim Integrated is a 14-bit, 4-channel simultaneous-sampling analog-to-digital converter (ADC) with independent track-and-hold per channel, 250ksps throughput per channel, 0–5V input range, and internal 4.096V reference. 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 multi-channel acquisition.

For engineers reviewing the MAX11057ECB+ datasheet, MAX11057ECB+ pinout, MAX11057ECB+ application, or MAX11057ECB+ equivalent, key selection criteria include simultaneous sampling capability, ±0.2 LSB DNL, 84.5dB SNR at 10kHz, 100ps channel-to-channel T/H matching, and 64-pin TQFP-EP package compatibility with high-density industrial PCB layouts.

Technical Context

The MAX11057ECB+ implements a SAR architecture with independent track-and-hold circuits for all four analog inputs, enabling true simultaneous sampling without inter-channel skew. Its 20MHz bidirectional parallel interface supports fast register configuration and real-time data readout without protocol overhead.

It features dual-supply operation (AVDD and DVDD), internal clock generation, and flexible reference options-either the low-drift 4.096V internal reference or an external 3.0V–4.25V source-enabling precise full-scale ranges from +3.7V to +5.2V while maintaining 14-bit monotonicity and no missing codes.

Key Specifications

Pinout & Package

MAX11057ECB+ is housed in a 64-pin TQFP-EP (10mm × 10mm) package with exposed pad connected internally to AGND for thermal management and noise reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606BSTZ and ADS8684IPWR, the MAX11057ECB+ delivers true 4-channel simultaneity at 250ksps with integrated 4.096V reference and dual-supply flexibility-making it optimal for compact, high-fidelity industrial control nodes where timing integrity and layout simplicity are prioritized over maximum resolution or aggregate throughput.

Availability

MAX11057ECB+ is available at Aetrix Electronics and suitable for multiphase motor control, power-grid protection, and automatic test equipment requiring stable component supply, long-term manufacturability, and guaranteed RoHS-compliant sourcing.

Supply support for MAX11057ECB+ 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, and communications applications.

The MAX11057ECB+ belongs to Maxim's high-performance simultaneous-sampling ADC family, engineered specifically for industrial automation systems demanding synchronized multi-channel acquisition, robust overvoltage tolerance, and minimal external component count.

FAQ

What is the maximum sampling rate per channel for the MAX11057ECB+?

The MAX11057ECB+ achieves 250ksps per channel with true simultaneous sampling across all four inputs. This rate is maintained over the full operating temperature range (−40°C to +85°C) and is supported by the internal clock and parallel interface. Each conversion completes in 3µs, and the device sustains this throughput continuously without duty-cycle limitations.

Does the MAX11057ECB+ require an external reference voltage?

No-the MAX11057ECB+ includes a low-drift 4.096V internal reference (±4ppm/°C) that directly supports a 0–5V input range. An external reference (3.0V–4.25V) may be used via the REFIO pin for custom full-scale ranges up to +5.2V, but it is optional. The internal reference eliminates BOM cost and board space for external references in most industrial applications.

How does the MAX11057ECB+ handle overvoltage conditions on its analog inputs?

The MAX11057ECB+ integrates ±20mA input clamps on each CH0–CH3 pin, providing robust overrange protection. When paired with a simple external series resistor (e.g., 250Ω), it safely withstands inputs from −2.5V to +7.5V relative to AGND without damage or performance degradation-eliminating the need for discrete TVS diodes or external clamp networks in harsh industrial environments.

What is the significance of the RDC and RDC_SENSE pins on the MAX11057ECB+?

The RDC and RDC_SENSE pins form a Kelvin-connected reference buffer decoupling network. RDC carries the reference buffer output current, while RDC_SENSE provides remote sensing to compensate for PCB trace IR drop. Together, they ensure stable 4.096V reference regulation under dynamic load-requiring ≥80µF total capacitance tied to AGND-and are essential for achieving specified INL and gain accuracy.

Can the MAX11057ECB+ interface directly with a 3.3V FPGA or microcontroller?

Yes-the MAX11057ECB+ supports DVDD from 2.7V to 5.25V, allowing direct connection to 3.3V logic without level shifters. Its digital I/O thresholds (VIH = 2.0V min, VIL = 0.8V max at DVDD = 3.3V) and 15pF input capacitance ensure reliable timing margins with standard FPGA I/O banks. The parallel interface operates at up to 20MHz, compatible with common synchronous read/write protocols.