Analog Devices Inc./Maxim Integrated MAX1309ECM/V+

Overview

The MAX1309ECM/V+ from Maxim Integrated is a 12-bit, 4-channel simultaneous-sampling analog-to-digital converter (ADC) with ±5V input range, ±16.5V fault-tolerant inputs, 0.9μs two-channel conversion time, and 20MHz parallel interface. It features independent track-and-hold per channel, internal +2.5V reference or external +2.0V to +3.0V reference support, 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 MAX1309ECM/V+ datasheet, MAX1309ECM/V+ pinout, MAX1309ECM/V+ application, or MAX1309ECM/V+ equivalent, key selection criteria include bipolar ±5V input range, 4-channel simultaneous sampling capability, 456ksps throughput per channel at full 8-channel operation, fault tolerance up to ±16.5V, and LQFP-48 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The MAX1309ECM/V+ implements independent track-and-hold circuitry per analog input channel, enabling true simultaneous sampling across all four channels 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, with timing-critical signals including CONVST, EOC, EOLC, RD, WR, and CS synchronized to the selected clock source.

Conversion data is delivered via a 12-bit bidirectional parallel bus (D0–D11), supporting high-speed interfacing with microcontrollers or FPGAs. The device uses separate analog (AVDD/AGND) and digital (DVDD/DGND) supply domains with strict ±0.3V AGND–DGND offset limit, and includes dedicated reference pins (REF, REFMS, REF+, COM, REF-) to configure unipolar or bipolar operation - though MAX1309ECM/V+ is specified exclusively for ±5V bipolar input range.

Key Specifications

Pinout & Package

The MAX1309ECM/V+ is housed in a 48-pin 7mm × 7mm lead(Pb)-free RoHS-compliant LQFP package with exposed thermal pad (EP). Pin assignments are identical across the MAX1308–MAX1310 family and validated per Maxim's official pin configuration diagram (Rev 6, 2/15).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, ±5V, 12-bit simultaneous-sampling ADC applications.

Compared with AD7357BRUZ and ADS8556IPMR, the MAX1309ECM/V+ uniquely combines native 4-channel simultaneous sampling, integrated ±5V bipolar operation, internal reference, and LQFP-48 footprint - reducing component count and layout complexity for industrial motor and power monitoring designs.

Availability

The MAX1309ECM/V+ is available at Aetrix Electronics and suitable for multiphase motor control, power-grid synchronization, and vibration analysis requiring stable component supply across industrial OEM production cycles.

Supply support for MAX1309ECM/V+ 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, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The MAX1304–MAX1314 family was engineered specifically for high-fidelity, multi-channel data acquisition in electric drive systems and smart grid instrumentation - emphasizing simultaneous sampling integrity, fault resilience, and system-level integration.

FAQ

What is the maximum fault voltage the MAX1309ECM/V+ analog inputs can withstand?

The MAX1309ECM/V+ analog inputs (CH0–CH3) tolerate up to ±16.5V relative to AGND, as specified in the Absolute Maximum Ratings table. This fault tolerance applies during powered and unpowered states, protecting against transient overvoltages in industrial motor drive and power monitoring applications without requiring external clamping components. The specification is validated per Maxim's test methodology and remains consistent across the MAX1308–MAX1310 series.

Does the MAX1309ECM/V+ support internal reference operation, and what is its accuracy?

Yes, the MAX1309ECM/V+ supports internal +2.5V reference operation with ±2.5mV initial accuracy (±0.1% of 2.5V) and 30ppm/°C temperature drift. The internal reference is buffered and accessible at REF and REFMS pins, eliminating the need for external reference ICs in cost-sensitive designs. When used, it delivers ±1 LSB INL and 71dB SINAD performance, as confirmed in the Electrical Characteristics tables under typical operating conditions.

What is the minimum and maximum clock frequency supported by the MAX1309ECM/V+?

The MAX1309ECM/V+ supports an external clock frequency range of 0.1MHz to 20MHz, with optimal performance achieved between 10MHz and 16.67MHz. Internally, it uses a 15MHz oscillator. Timing specifications such as tCONV and tNEXT are guaranteed across this full range, and the device automatically adapts throughput: e.g., 456ksps/channel at 16.67MHz external clock versus 413ksps/channel at 15MHz internal clock, as documented in the Electrical Characteristics table.

How many analog input channels does the MAX1309ECM/V+ have, and are they truly simultaneous?

The MAX1309ECM/V+ has four independent analog input channels (CH0–CH3) with fully independent track-and-hold circuitry, enabling true simultaneous sampling. Channel-to-channel T/H matching is guaranteed at ≤100ps, and aperture delay is 8ns - ensuring sub-nanosecond timing alignment. This capability is explicitly confirmed in the General Description and Features sections, distinguishing it from multiplexed or pseudo-simultaneous architectures.

What package type and temperature range is the MAX1309ECM/V+ qualified for?

The MAX1309ECM/V+ is supplied in a 48-pin LQFP package measuring 7mm × 7mm with exposed thermal pad, and is qualified for the extended industrial temperature range of −40°C to +85°C. This qualification is explicitly stated in the Ordering Information table and Absolute Maximum Ratings section, and the RoHS-compliant + suffix denotes lead-free finish. Thermal performance is validated with 1818.2mW continuous power dissipation at +70°C ambient.