Analog Devices Inc./Maxim Integrated MAX1308ECM+

Overview

MAX1308ECM+ from Maxim Integrated is a 12-bit, 8-channel simultaneous-sampling analog-to-digital converter (ADC) with ±5V input range and ±16.5V fault-tolerant inputs. It achieves 456ksps per channel throughput across all eight channels, features 8ns aperture delay and 100ps channel-to-channel track-and-hold matching, and operates from +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies - ideal for multiphase motor control and power-grid synchronization.

For engineers reviewing the MAX1308ECM+ datasheet, MAX1308ECM+ pinout, MAX1308ECM+ application, or MAX1308ECM+ equivalent, key selection criteria include bipolar ±5V input support, simultaneous sampling integrity, 12-bit accuracy with ±1 LSB INL, 48-pin LQFP package compatibility, and fault-tolerant analog input protection up to ±16.5V.

Technical Context

The MAX1308ECM+ implements independent track-and-hold circuitry per channel to enable true simultaneous sampling across all eight analog inputs. Its internal 15MHz clock or external clock interface (up to 20MHz) drives conversion timing, with dedicated CONVST, EOC, and EOLC signals supporting precise system-level synchronization in real-time control loops.

It supports both internal +2.5V reference and external reference (2.0V–3.0V), with REF+/REF-/COM pins establishing a differential reference architecture. The device uses a 12-bit, 20MHz bidirectional parallel bus (D0–D11) for low-latency data transfer and includes channel shutdown (CHSHDN) and global shutdown (SHDN) for dynamic power management.

Key Specifications

Pinout & Package

The MAX1308ECM+ is housed in a 48-pin 7mm × 7mm lead(Pb)-free RoHS-compliant LQFP package with exposed thermal pad (EP). Pin assignments are optimized for analog/digital partitioning: AVDD/AGND pins are grouped on one side, DGND/DVDD on another, and analog inputs (CH0–CH7) occupy dedicated pins with adjacent MSV/REF/REFMS/REF+/COM/REF- for stable reference decoupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit simultaneous-sampling ADC applications.

Compared with AD7606BSTZ and ADS8588SIPM, the MAX1308ECM+ offers the fastest parallel-data throughput (456ksps/channel) with built-in ±5V bipolar support and fault tolerance - making it optimal for real-time motor control where timing determinism and robustness are prioritized over ultimate SNR or ultra-wide input range.

Availability

MAX1308ECM+ is available at Aetrix Electronics and suitable for multiphase motor control, power-grid synchronization, and vibration analysis requiring stable component supply across extended temperature (-40°C to +85°C) and long production lifecycles.

Supply support for MAX1308ECM+ 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, mixed-signal, and power-management ICs for industrial, automotive, and communications systems.

The MAX1304–MAX1314 family was engineered specifically for high-fidelity, multichannel data acquisition in real-time control and power-system monitoring - emphasizing simultaneous sampling integrity, fault resilience, and seamless integration with FPGA/microcontroller parallel buses.

FAQ

What is the maximum fault voltage the MAX1308ECM+ analog inputs can withstand?

The MAX1308ECM+ analog inputs (CH0–CH7) tolerate up to ±16.5V relative to AGND under fault conditions, as specified in the Absolute Maximum Ratings table. This protection applies regardless of power state and enables direct connection to industrial signal chains without external TVS diodes or resistive limiting networks - a key reliability feature for motor drive and grid instrumentation where transient overvoltages are common. The MAX1308ECM+ maintains functionality after such events when operated within its normal supply and temperature ranges.

Does the MAX1308ECM+ support both internal and external reference configurations?

Yes, the MAX1308ECM+ supports dual reference modes: an internal +2.5V bandgap reference (typical drift 30ppm/°C) and external reference input (2.0V–3.0V) applied to REF/REFMS pins. In internal mode, REF and REFMS are bypassed with ≥0.01µF capacitors to AGND; in external mode, both pins are driven together with a stable voltage source. This flexibility allows system designers to trade off accuracy, temperature stability, and board space - the MAX1308ECM+ delivers full 12-bit performance in either configuration when properly decoupled.

How does the MAX1308ECM+ achieve simultaneous sampling across eight channels?

The MAX1308ECM+ achieves true simultaneous sampling using independent track-and-hold (T/H) amplifiers for each of its eight analog inputs (CH0–CH7). All T/H circuits sample at the exact same instant upon assertion of the CONVST signal, freezing input voltages before conversion begins. This architecture eliminates channel-to-channel skew - critical for vector control and power quality analysis - and is validated by the 100ps T/H matching specification. The MAX1308ECM+ then sequentially converts the held values while maintaining sample integrity, ensuring phase coherence across the entire 8-channel dataset.

What digital interface options does the MAX1308ECM+ provide?

The MAX1308ECM+ features a 12-bit bidirectional parallel interface (D0–D11) operating at up to 20MHz, with standard control signals including CS, RD, WR, CONVST, EOC, and EOLC. It does not support SPI, I²C, or JESD204B. The interface is designed for direct connection to microcontrollers, FPGAs, or ASICs with parallel GPIO capability - enabling low-latency, deterministic data capture with 30ns access time and tri-state outputs. This architecture minimizes software overhead and timing uncertainty compared to serial protocols, making the MAX1308ECM+ especially suitable for hard real-time control loops.

Can the MAX1308ECM+ operate with different analog and digital supply voltages?

Yes, the MAX1308ECM+ supports independent analog and digital supplies: AVDD from +4.75V to +5.25V and DVDD from +2.7V to +5.25V. This allows interfacing with 3.3V logic systems while maintaining full analog performance, and simplifies power domain isolation in mixed-signal PCB layouts. The device specifies separate analog (54–60mA) and digital (1.3–2.6mA) supply currents, and requires strict AGND–DGND separation (≤±0.3V potential difference) to preserve 12-bit accuracy - a requirement explicitly called out in the Absolute Maximum Ratings table for the MAX1308ECM+.