Analog Devices Inc./Maxim Integrated MAX1301AEUP+

Overview

The MAX1301AEUP+ from Maxim Integrated is a 16-bit, multirange, successive-approximation analog-to-digital converter (ADC) with four single-ended or two true-differential input channels, ±16.5V overvoltage tolerance, 115ksps maximum sample rate, and internal +4.096V reference - designed for precision data acquisition in industrial sensor interfaces and embedded control systems.

For engineers reviewing the MAX1301AEUP+ datasheet, MAX1301AEUP+ pinout, MAX1301AEUP+ application, or MAX1301AEUP+ equivalent, this page delivers verified electrical specifications, validated TSSOP-20 pin functions, confirmed multirange input configuration support, and real-world timing and noise performance metrics under specified operating conditions.

Technical Context

The MAX1301AEUP+ implements a fully differential SAR architecture with integrated track-and-hold, supporting software-programmable unipolar/bipolar ranges per channel: seven single-ended (e.g., ±3 × VREF, (±3 × VREF)/4) and three differential (±3 × VREF, ±6 × VREF). It uses an SPI-/QSPI-/MICROWIRE-compatible serial interface with CS, SCLK, DIN, DOUT, and SSTRB signals.

It features separate analog (AVDD1/AVDD2) and digital (DVDD/DVDDO) supplies, enabling interfacing with 2.7V–5.25V logic while maintaining low-noise analog performance. Fault-tolerant inputs remain isolated during overvoltage events on idle channels, preserving conversion integrity across active channels.

Key Specifications

Pinout & Package

MAX1301AEUP+ is housed in a RoHS-compliant 20-pin TSSOP package (4.4mm × 6.5mm, 0.65mm pitch), optimized for space-constrained PCB layouts in industrial modules and avionics subsystems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit multichannel SAR ADC applications.

Compared with ADS8684IPWR and AD7606C-16BSTZ, the MAX1301AEUP+ offers the smallest footprint (TSSOP-20), lowest power-down current (1µA), and simplest serial interface while retaining ±16.5V fault tolerance - making it optimal for space- and energy-constrained embedded systems requiring four precision analog inputs.

Availability

MAX1301AEUP+ is available at Aetrix Electronics and suitable for industrial process monitoring, avionics sensor interfaces, and robotics joint control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX1301AEUP+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX1300/MAX1301 product line was engineered for precision, low-power, multirange data acquisition in harsh environments - delivering fault-tolerant 16-bit conversion with minimal external components and flexible digital interfacing.

FAQ

What is the maximum sample rate of the MAX1301AEUP+?

The MAX1301AEUP+ achieves a maximum throughput rate of 115ksps in external clock mode with a 3.5MHz SCLK. This rate is maintained across all supported input ranges and configurations, including both single-ended and differential acquisitions. The actual achievable rate depends on system-level timing margins and clock stability, but 115ksps is the guaranteed maximum under datasheet conditions. The MAX1301AEUP+ also supports lower rates in internal clock and external acquisition modes.

Does the MAX1301AEUP+ support differential input configurations?

Yes, the MAX1301AEUP+ supports true differential input operation across two dedicated channels (CH0–CH1 and CH2–CH3), with three selectable differential input ranges: (±3 × VREF)/2, ±3 × VREF, and ±6 × VREF. Each channel pair is independently configurable via software, and the device maintains 16-bit resolution and 91dB SINAD in differential mode. The MAX1301AEUP+ does not support interleaved or pseudo-differential modes - only true differential pairs as defined in the analog input configuration byte.

Can the MAX1301AEUP+ operate with an external reference voltage?

Yes, the MAX1301AEUP+ accepts an external reference voltage between 3.800V and 4.136V applied to the REF pin, while REFCAP is connected to AVDD1 to disable the internal bandgap buffer. External reference operation preserves the full 16-bit dynamic range and allows system-level calibration traceability. The MAX1301AEUP+'s reference input resistance is 20kΩ–45kΩ in active modes, and its reference current draw remains below 200µA - compatible with most precision external references.

What is the overvoltage tolerance specification for the MAX1301AEUP+ analog inputs?

The MAX1301AEUP+ analog inputs (CH0–CH3) are rated for continuous ±16.5V overvoltage relative to AGND1, regardless of power state or channel activity. This tolerance is achieved through integrated back-to-back diode protection and holds under all operating conditions, including power-down modes. Fault events on one channel do not affect conversions on other channels due to internal isolation circuitry - a key reliability feature confirmed in the MAX1301AEUP+ datasheet absolute maximum ratings table.

How many power supply domains does the MAX1301AEUP+ require?

The MAX1301AEUP+ requires four independent supply domains: AVDD1/AGND1 (core ADC and T/H), AVDD2/AGND2 (preamplifier), DVDD/DGND (digital control logic), and DVDDO/DGNDO (I/O buffer). Each domain must be decoupled with a 0.1µF capacitor to its respective ground. While AVDD1, AVDD2, and DVDD may be tied together for simplified layout, separating them yields optimal noise performance - especially critical for achieving 91dB SINAD in differential mode. The MAX1301AEUP+ datasheet specifies distinct current draws per domain (e.g., 13.5mA for AVDD2).