Analog Devices Inc./Maxim Integrated MAX1306ECM+

Overview

MAX1306ECM+ from Maxim Integrated is a 12-bit, 2-channel simultaneous-sampling analog-to-digital converter (ADC) with 0V to +5V unipolar input range, ±6V fault-tolerant inputs, and 0.9μs two-channel conversion time. It features independent track-and-hold circuitry, internal +2.5V reference, 20MHz parallel interface, and operates from +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies - ideal for precision motor phase current sensing in multiphase motor control systems.

For engineers reviewing the MAX1306ECM+ datasheet, MAX1306ECM+ pinout, MAX1306ECM+ application, or MAX1306ECM+ equivalent, this page delivers verified specifications including simultaneous dual-channel sampling accuracy, fault-tolerant input protection, LQFP-48 package layout, and design-critical timing parameters for real-time control loop integration.

Technical Context

The MAX1306ECM+ implements independent track-and-hold (T/H) circuitry per channel to enable true simultaneous sampling across its two analog inputs (CH0, CH1), with 100ps channel-to-channel T/H match and 8ns aperture delay. Its architecture supports both internal clock (15MHz) and external clock (up to 20MHz) operation, delivering 901ksps throughput per channel when two channels are active.

It uses a 12-bit, 20MHz bidirectional parallel bus (D0–D11) for data transfer and control, with dedicated CONVST, RD, WR, CS, and EOC/EOLC signals for deterministic timing. The device integrates internal reference buffers (REF, REFMS, REF+, COM, REF−) configured for unipolar 0V–+5V operation, with MSV tied to AGND for bipolar variants but bypassed via 2.2μF/0.1μF capacitors for MAX1306ECM+.

Key Specifications

Pinout & Package

MAX1306ECM+ is housed in a 48-pin 7mm × 7mm LQFP package (RoHS-compliant, lead-free), with separate analog/digital ground and power planes (AGND/DGND, AVDD/DVDD), dedicated reference pins (REF, REFMS, REF+, COM, REF−), and a 12-bit parallel data bus (D0–D11).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7322BRUZ and ADS8588SIPM, the MAX1306ECM+ uniquely combines integrated +2.5V reference, ±6V fault tolerance, parallel 20MHz interface, and compact LQFP-48 packaging - making it optimal for space-constrained, cost-sensitive 2-channel motor control designs where deterministic timing and simplified BOM are critical.

Availability

MAX1306ECM+ is available at Aetrix Electronics and suitable for multiphase motor control, power-factor monitoring, and vibration analysis applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MAX1306ECM+ 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 signal integrity.

The MAX1304–MAX1314 family targets high-speed, multichannel data acquisition in real-time control systems - specifically engineered for simultaneous sampling, fault tolerance, and seamless microcontroller/FPGA interfacing in motor drives and power electronics.

FAQ

What is the maximum analog input voltage the MAX1306ECM+ can tolerate without damage?

The MAX1306ECM+ supports ±6V fault-tolerant analog inputs relative to AGND on CH0 and CH1. This means it safely withstands transient overvoltages up to +6V or down to –6V even when powered down or unpowered - protecting against inductive kickback in motor drive circuits. Continuous operation remains limited to the specified 0V to +5V unipolar range.

Does the MAX1306ECM+ require an external reference voltage, or does it include an internal one?

The MAX1306ECM+ includes an internal +2.5V bandgap reference accessible via REF and REFMS pins. When using the internal reference, bypass REF and REFMS with ≥0.01μF capacitors to AGND. External reference operation (2.0V–3.0V) is optional but not required - the internal reference meets 30ppm/°C drift and 2.475V–2.525V tolerance specs.

How many analog input channels does the MAX1306ECM+ have, and what is their sampling behavior?

The MAX1306ECM+ has two independent analog input channels (CH0 and CH1) with dedicated track-and-hold circuitry. Both channels sample simultaneously upon CONVST assertion, achieving 100ps channel-to-channel T/H matching and 8ns aperture delay - ensuring phase-coherent acquisition essential for vector control algorithms.

What package type and pin count does the MAX1306ECM+ use, and is it RoHS-compliant?

The MAX1306ECM+ is supplied in a 48-pin LQFP package measuring 7mm × 7mm with exposed pad, and carries the '+' suffix indicating lead(Pb)-free/RoHS-compliant construction. Its pinout separates analog and digital supplies/grounds and provides dedicated reference and timing pins to minimize noise coupling in mixed-signal layouts.

Can the MAX1306ECM+ operate with different digital supply voltages, and what is the valid range?

Yes, the MAX1306ECM+ supports a wide digital supply range of +2.7V to +5.25V on DVDD, allowing interoperability with 3.3V or 5V logic families. Digital input thresholds scale with DVDD (VIH = 0.7×DVDD, VIL = 0.3×DVDD), and the 12-bit parallel interface (D0–D11) operates reliably across this range while consuming only 1.3mA typical DVDD current.