Analog Devices Inc./Maxim Integrated MAX1318ECM+

Overview

The MAX1318ECM+ from Maxim Integrated is a 2-channel, 14-bit simultaneous-sampling analog-to-digital converter (ADC) with 0 to +5V unipolar input range and ±6.0V fault-tolerant inputs. It achieves 2.5µs conversion time for two channels and 250ksps throughput per channel, supporting high-fidelity waveform capture in multiphase motor control and power-grid synchronization systems.

For engineers reviewing the MAX1318ECM+ datasheet, MAX1318ECM+ pinout, MAX1318ECM+ application, or MAX1318ECM+ equivalent, key selection criteria include its dual-channel simultaneous sampling capability, internal/external reference flexibility (+2.5V internal or +2.0V to +3.0V external), 48-pin LQFP package, ±1.5 LSB INL, and 76.5dB SINAD at 100kHz - all critical for precision industrial measurement designs.

Technical Context

This ADC employs independent track-and-hold (T/H) circuitry per channel to preserve inter-channel phase alignment, with 50ps T/H matching and 10ns aperture delay. Its 10MHz T/H input bandwidth supports accurate digitization of fast transients while maintaining coherence across both channels.

The device uses a 16.6MHz 14-bit parallel interface for low-latency data transfer and supports configuration via write-only register to enable/disable channels. Internal clock operation (10MHz) or external clock (up to 15MHz) provides timing flexibility without requiring external clock generation circuitry.

Key Specifications

Pinout & Package

MAX1318ECM+ is housed in a 48-pin LQFP package (7mm × 7mm footprint) with exposed thermal pad, rated for operation from –40°C to +85°C. Pin assignments are optimized for analog/digital partitioning and noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 14-bit simultaneous-sampling ADC applications.

Compared with ADS8556IPMR and AD7656ASTZ, the MAX1318ECM+ offers native 0 to +5V unipolar compatibility, smaller 48-pin LQFP footprint, and lower system integration complexity due to its dedicated 0–5V input architecture - making it optimal for industrial sensor interfaces where unipolar signals dominate.

Availability

MAX1318ECM+ is available at Aetrix Electronics and suitable for multiphase motor control, power-grid synchronization, and power-factor monitoring applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX1318ECM+ 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 applications.

The MAX1316–MAX1326 family was engineered specifically for high-accuracy, multi-channel data acquisition in power electronics and motor control - emphasizing simultaneous sampling integrity, fault tolerance, and flexible reference/clock architecture.

FAQ

What is the maximum fault voltage tolerance on the analog inputs of the MAX1318ECM+?

The MAX1318ECM+ features ±6.0V fault-tolerant analog inputs (CH0 and CH1), allowing safe operation even when transient overvoltages exceed the 0 to +5V nominal input range. This protection is intrinsic to the input structure and does not require external clamping components, simplifying design for harsh industrial environments where voltage spikes are common. The specification is validated per Absolute Maximum Ratings and applies across the full –40°C to +85°C operating temperature range.

Does the MAX1318ECM+ support internal reference operation without external components?

Yes, the MAX1318ECM+ integrates a +2.5V internal reference (VREFMS = 2.500V ±25mV) and requires only a 0.1µF capacitor from REFMS to AGND for stable operation. No external reference IC or trimming is needed, reducing BOM count and PCB area. The internal reference maintains 30ppm/°C temperature coefficient and exhibits minimal drift over supply voltage variation, enabling calibration-free operation in portable and space-constrained industrial modules.

How does the MAX1318ECM+ achieve simultaneous sampling across its two channels?

The MAX1318ECM+ uses independent track-and-hold (T/H) amplifiers for each channel, both controlled by the same CONVST rising edge. This architecture ensures identical aperture timing - with 50ps channel-to-channel T/H matching - so voltage and current samples are captured at precisely the same instant. Unlike multiplexed ADCs, this eliminates phase skew that would corrupt power calculations or vector control algorithms in real-time motor drives.

What digital interface options does the MAX1318ECM+ provide, and what are the timing constraints?

The MAX1318ECM+ implements a 14-bit bidirectional parallel interface operating up to 16.6MHz, with dedicated RD, WR, CS, and EOC signals. Read access requires t10 = 30ns data-access time after RD assertion, and bus relinquishment occurs within t11 = 30ns after RD deassertion. The interface supports both internal (10MHz) and external (up to 15MHz) clocking modes, selected via the INTCLK/EXTCLK pin - eliminating timing-critical setup/hold dependencies found in SPI-based alternatives.

Can the MAX1318ECM+ operate with separate analog and digital supply voltages, and what are the recommended decoupling practices?

Yes, the MAX1318ECM+ separates AVDD (+4.75V to +5.25V) and DVDD (+2.7V to +5.25V) supplies to minimize digital noise coupling into analog circuits. Each AVDD pin must be bypassed to AGND with a 0.1µF ceramic capacitor placed within 2mm of the pin; DVDD requires identical treatment to DGND. AGND and DGND must connect at a single point near the device to prevent ground loops. These practices are validated in Maxim's layout guidelines and directly impact measured SINAD and SNR performance.