Analog Devices Inc./Maxim Integrated MAX1320ECM+

Overview

MAX1320ECM+ from Maxim Integrated is a 14-bit, 8-channel simultaneous-sampling analog-to-digital converter (ADC) with ±5V input range, ±16.5V fault-tolerant inputs, 250ksps per channel throughput, and 48-pin LQFP package. It features independent track/hold per channel, 10MHz T/H bandwidth, and internal +2.5V reference - designed for precision phase-critical acquisition in industrial power monitoring systems.

For engineers reviewing the MAX1320ECM+ datasheet, MAX1320ECM+ pinout, MAX1320ECM+ application, or MAX1320ECM+ equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in motor control and grid synchronization, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The MAX1320ECM+ implements eight independent track-and-hold amplifiers enabling true simultaneous sampling across all channels - preserving inter-channel phase relationships essential for vector-based measurements. Its bipolar ±5V input architecture supports direct connection to industrial current/voltage transducers without external level-shifting.

Conversion is controlled via a 16.6MHz 14-bit parallel interface with configurable CONVST-triggered sequencing, and supports both internal clock (10MHz) and external clock (up to 12.5MHz). Power delivery uses separate AVDD (+4.75V to +5.25V) and DVDD (+2.7V to +5.25V) rails, with typical total supply current under 48mA.

Key Specifications

Pinout & Package

MAX1320ECM+ is housed in a 48-pin LQFP package (7mm × 7mm footprint) with exposed thermal pad, rated for -40°C to +85°C operation. Pin functions are validated per Maxim's official datasheet Rev 4 (10/2008).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8588SIPM and AD7606C-18, the MAX1320ECM+ offers optimal balance of 14-bit precision, 250ksps 8-channel throughput, integrated ±5V-compatible reference, and 16.6MHz parallel interface - making it uniquely suited for cost-sensitive, phase-coherent industrial control systems requiring rapid firmware integration.

Availability

MAX1320ECM+ is available at Aetrix Electronics and suitable for multiphase motor control, power-grid synchronization, and power-factor monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1320ECM+ 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, emphasizing integration, reliability, and ease of system design.

The MAX1316–MAX1326 family was engineered specifically for simultaneous-sampling data acquisition in harsh industrial environments - prioritizing fault tolerance, phase coherence, and simplified reference/biasing over raw resolution or ultra-low power.

FAQ

What is the maximum sample rate per channel for the MAX1320ECM+ when all eight channels are active?

The MAX1320ECM+ achieves 250ksps per channel with all eight channels enabled. This is measured using the internal 10MHz clock and corresponds to a full 8-channel conversion time of 3.7µs. The throughput remains constant regardless of channel count due to parallel T/H architecture - unlike multiplexed ADCs where rate degrades with channel count. MAX1320ECM+ maintains this rate across its full operating temperature range (-40°C to +85°C).

Does the MAX1320ECM+ require an external reference voltage, or does it include an internal one?

The MAX1320ECM+ includes an internal +2.5V reference (±2.5mV initial accuracy, 30ppm/°C drift) that can be used directly. It also supports external references from +2.0V to +3.0V applied to the REF and REFMS pins. For bipolar ±5V operation, REFMS must be shorted to REF per datasheet Figure 1 and Pin Description. MAX1320ECM+ does not require external reference for basic functionality, reducing BOM count and layout complexity.

How is channel-to-channel timing skew managed in the MAX1320ECM+?

The MAX1320ECM+ guarantees 50ps maximum channel-to-channel track/hold matching, achieved through matched on-chip T/H amplifier design and symmetrical routing. This skew is measured as aperture-delay mismatch between channels and is critical for preserving phase integrity in vector computations. The specification is tested and guaranteed across temperature and supply variations - not just typical - and is explicitly validated for the MAX1320ECM+ variant per Electrical Characteristics Table on page 3 of the datasheet.

Can the MAX1320ECM+ interface directly with a 3.3V microcontroller parallel bus?

Yes - the MAX1320ECM+ digital I/Os (D0–D13, RD, WR, CS, etc.) operate from DVDD = +2.7V to +5.25V and are fully compatible with 3.3V logic levels. VIH is defined as 0.7 × DVDD (≥2.31V at 3.3V), and VOL is ≤0.4V at 1.6mA sink - satisfying standard 3.3V CMOS interface requirements. No level-shifting circuitry is needed when DVDD = 3.3V. MAX1320ECM+ supports mixed-voltage operation with AVDD at 5V and DVDD at 3.3V.

What fault-protection rating does the MAX1320ECM+ provide on its analog inputs?

The MAX1320ECM+ analog inputs (CH0–CH7) are rated for ±16.5V continuous fault tolerance relative to AGND - exceeding the ±5V full-scale range by more than 3×. This protection is inherent to the input ESD structure and requires no external components. It enables robust operation in industrial settings with inductive kickback, ground bounce, or transient coupling - confirmed in Absolute Maximum Ratings table (page 2) and General Description section of the MAX1320ECM+ datasheet.