Analog Devices Inc./Maxim Integrated MAX1324ECM+

Overview

The MAX1324ECM+ from Maxim Integrated is an 8-channel, 14-bit simultaneous-sampling analog-to-digital converter (ADC) with ±10V input range, ±16.5V fault-tolerant inputs, and 250ksps per-channel throughput at full 8-channel operation. It features independent track/hold per channel, 10MHz input bandwidth, internal +2.5V reference, and operates from +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies. It is used in high-precision industrial power monitoring and motor control systems requiring phase-coherent multichannel acquisition.

For engineers reviewing the MAX1324ECM+ datasheet, MAX1324ECM+ pinout, MAX1324ECM+ application, or MAX1324ECM+ equivalent, this page delivers verified specifications, real-world timing behavior, package-level layout guidance, fault-tolerance boundaries, and validated alternative options for bipolar ±10V multichannel data acquisition.

Technical Context

This ADC employs eight independent track-and-hold amplifiers synchronized by a single CONVST edge, preserving inter-channel phase integrity for waveform analysis and synchronization-critical applications. Its parallel 14-bit interface runs up to 16.6MHz, supporting direct connection to FPGA or microcontroller data buses without serialization overhead.

It supports both internal clock (10MHz fixed) and external clock (up to 12.5MHz), with configurable shutdown and channel-enable (ALLON) logic. The device uses a bipolar input architecture where MSV connects directly to AGND and REFMS ties to REF - distinct from unipolar variants - enabling true ±10V differential measurement with 76.5dB SINAD at 100kHz.

Key Specifications

Pinout & Package

MAX1324ECM+ is housed in a 48-pin LQFP package (7mm × 7mm footprint) with exposed thermal pad. Pin assignments are identical across the MAX1324/MAX1325/MAX1326 family and optimized for mixed-signal PCB layout: analog (AVDD, AGND, CH0–CH7, REF+, REF-, COM, MSV, REFMS, REF) and digital (DVDD, DGND, D0–D13, RD, WR, CS, CLK, CONVST, EOC, EOLC, SHDN, ALLON, INTCLK/EXTCLK) sections are physically segregated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606C-18 and ADS8688, the MAX1324ECM+ uniquely combines true simultaneous sampling, parallel 14-bit interface, and ±16.5V fault tolerance - making it optimal for real-time motor control and grid synchrophasor systems where timing integrity and ruggedness are non-negotiable.

Availability

MAX1324ECM+ 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 MAX1324ECM+ 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 markets, with emphasis on integration, reliability, and signal-chain optimization.

The MAX1324ECM+ belongs to Maxim's simultaneous-sampling ADC product line, engineered specifically for industrial power monitoring, motor control, and energy measurement systems demanding phase-coherent multichannel acquisition and robust fault tolerance.

FAQ

What is the maximum sample rate per channel for the MAX1324ECM+ when all eight channels are active?

The MAX1324ECM+ achieves 250ksps per channel when operating all eight channels simultaneously. This corresponds to a total conversion time of 3.7µs for the full set, enabled by its independent track/hold architecture and 10MHz internal clock. The throughput remains constant regardless of channel count due to true parallel sampling - unlike successive-approximation ADCs that scale linearly with channel count.

Does the MAX1324ECM+ require external calibration to meet its specified INL and DNL performance?

No, the MAX1324ECM+ does not require external calibration. It guarantees ±1.5 LSB integral nonlinearity (INL) and ±1 LSB differential nonlinearity (DNL) across the full -40°C to +85°C temperature range with no missing codes. These specifications are achieved through factory trimming and on-chip design techniques, eliminating the need for system-level calibration routines in deployed equipment.

How is the ±10V input range implemented in the MAX1324ECM+, and what are the implications for reference connections?

The MAX1324ECM+ implements its ±10V bipolar input range using a dedicated internal architecture where MSV is connected directly to AGND and REFMS is tied to REF (not bypassed separately). This differs from unipolar variants (e.g., MAX1316) and requires REF+ and REF- to be bypassed with 2.2µF || 0.1µF capacitors to AGND. This configuration ensures accurate midscale alignment at 0V and supports true differential measurement without external level-shifting components.

What is the significance of the 50ps channel-to-channel T/H matching specification for the MAX1324ECM+?

The 50ps aperture-delay matching across all eight channels of the MAX1324ECM+ ensures sub-degree phase alignment between sampled signals - for example, <0.03° error at 1kHz. This enables accurate vector calculations in motor control (e.g., flux estimation) and compliance with IEEE C37.118.1 synchrophasor standards for power-grid monitoring, where timing coherence between voltage and current channels is mandatory.

Can the MAX1324ECM+ operate with an external reference voltage, and what are the acceptable voltage and impedance requirements?

Yes, the MAX1324ECM+ supports external reference voltages from +2.0V to +3.0V applied to both REF and REFMS pins. The device draws ≤±250µA from the reference source and presents 15pF input capacitance. To maintain accuracy, the external reference must exhibit ≤30ppm/°C drift and be bypassed with ≥0.1µF ceramic capacitance to AGND. Using a precision external reference improves system-level gain stability beyond the ±30ppm/°C of the internal +2.5V reference.