Analog Devices Inc./Maxim Integrated MAX1379ATP+T

Overview

MAX1379ATP+T from Maxim Integrated is a dual, simultaneous-sampling, 12-bit SAR ADC with SPI/QSPI/MICROWIRE/DSP-compatible serial interface and internal 4.096V reference. It operates from a 4.75V–5.25V analog supply and 1.8V–AVDD digital supply, delivers 1.25Msps per channel, achieves 71dB SINAD and 84dBc SFDR, and targets motor control and industrial process monitoring where synchronized dual-channel acquisition is critical.

For engineers reviewing the MAX1379ATP+T datasheet, MAX1379ATP+T pinout, MAX1379ATP+T application, or MAX1379ATP+T equivalent, key selection criteria include its ±VREF/2 or 0–VREF input range, dual independent serial outputs for high-throughput data transfer, partial/full power-down modes (10mW / 5µA), and automotive-grade −40°C to +125°C operation in a 20-pin TQFN-EP package.

Technical Context

The MAX1379ATP+T implements two independent 12-bit successive approximation register (SAR) ADCs with true simultaneous sampling-critical for phase-sensitive measurements in motor current sensing and power quality analysis. Its track-and-hold acquisition time is 125ns, aperture jitter is 30ps, and full-linear bandwidth is 1MHz at (S/N+D) > 68dB.

It supports flexible input configurations: either two differential inputs (AIN1A/AIN1B, AIN2A/AIN2B) or four single-ended inputs via internal 2×2 mux. The internal reference is fixed at 4.096V (±10mV), and external reference mode accepts 1.0V to AVDD+0.05V with 50pF input capacitance.

Key Specifications

Pinout & Package

The MAX1379ATP+T is housed in a 20-pin thin quad flat no-lead exposed pad (TQFN-EP) package, 4mm × 4mm × 0.8mm, with thermal pad for enhanced heat dissipation in high-duty-cycle applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8588SIPM and AD7327BRUZ, the MAX1379ATP+T offers superior timing correlation (simultaneous sampling with <2ns matching), optimized power efficiency (90mW vs. >150mW), and guaranteed automotive temperature operation-making it uniquely suited for real-time motor control and embedded industrial systems demanding deterministic acquisition.

Availability

MAX1379ATP+T is available at Aetrix Electronics and suitable for motor control, industrial process monitoring, and power quality analysis requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MAX1379ATP+T 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 markets.

The MAX1377/MAX1379/MAX1383 family was engineered specifically for high-fidelity, synchronized dual-channel data acquisition in harsh environments-emphasizing low jitter, robust power-down states, and automotive-grade reliability.

FAQ

What is the maximum sampling rate supported by the MAX1379ATP+T?

The MAX1379ATP+T supports a maximum throughput rate of 1.25 Msps per ADC in dual-output mode. This is achieved using a 20MHz SCLK with 16 clock cycles per conversion. In single-output mode, the maximum rate drops to 0.625 Msps due to serialized data transfer. The device maintains full linear bandwidth (1MHz) only above 10ksps sample rates.

Does the MAX1379ATP+T support true differential input operation?

Yes, the MAX1379ATP+T supports true differential input operation on both ADC channels: AIN1A–AIN1B and AIN2A–AIN2B, with a range of ±VREF/2. Each channel can also be configured for unipolar operation (0 to VREF) via the U/B pin. Input isolation between channels exceeds 80dB, minimizing crosstalk in high-precision applications.

What are the power-down modes available on the MAX1379ATP+T and their current consumption?

The MAX1379ATP+T offers two power-down modes: partial power-down draws 2mA (reference remains active for fast wake-up), and full power-down draws 5µA. Normal operation consumes 16–18mA analog supply current at 5V AVDD. Digital supply current (IVL) is 1–3mA depending on VL and load, enabling low-voltage microcontroller interfacing without level shifters.

Can the MAX1379ATP+T use an external reference, and what are the voltage limits?

Yes, the MAX1379ATP+T supports external reference operation when REFSEL is driven high. The REF pin accepts voltages from 1.0V to AVDD+0.05V (i.e., 1.0V to 5.3V). External reference input impedance is 50pF with ±1µA leakage, and average input current is 800µA at maximum throughput-requiring a low-noise, low-impedance source.

Is the MAX1379ATP+T pin-compatible with other devices in the MAX1377/MAX1379/MAX1383 family?

Yes, the MAX1379ATP+T shares identical pinout, package (20-pin TQFN-EP), and footprint with MAX1377ATP+ and MAX1383ATP+. However, analog supply voltage ranges differ: MAX1377 uses 2.7–3.6V, MAX1379 uses 4.75–5.25V, and MAX1383 uses 4.75–5.25V with ±10V input range-so PCB design must match the selected variant's supply and input requirements.