Analog Devices Inc./Maxim Integrated MAX1415EWE+

Overview

MAX1415EWE+ from Maxim Integrated is a 16-bit, low-power, 2-channel sigma-delta analog-to-digital converter with fully differential inputs, integrated PGA (gain 1–128), on-chip input buffer, and internal oscillator (1 MHz or 2.4576 MHz). It delivers ±0.0015% INL (max) with no missing codes and operates from 2.7V to 3.6V, targeting high-accuracy sensor signal conditioning in industrial instrumentation and weigh scales.

For engineers reviewing the MAX1415EWE+ datasheet, MAX1415EWE+ pinout, MAX1415EWE+ application, or MAX1415EWE+ equivalent, this device supports SPI/QSPI/MICROWIRE serial interface, offers >98 dB 50/60 Hz rejection, on-demand self-calibration, and is specified for –40°C to +85°C operation in TSSOP-16 package - critical for precision loop-powered and strain-gauge measurement systems.

Technical Context

The MAX1415EWE+ employs a second-order sigma-delta modulator with digital filtering to achieve true 16-bit resolution and no missing codes. Its architecture includes a programmable gain amplifier, selectable input buffering, and dual fully differential analog input channels (AIN1±, AIN2±), enabling flexible multiplexed or independent channel acquisition.

It features an internal clock generator supporting two fixed frequencies (1 MHz or 2.4576 MHz), configurable via the CLK bit, and provides synchronous serial output via DOUT with DRDY handshake. Calibration registers allow user-programmable offset and gain correction, and system calibration is supported via dedicated command sequences.

Key Specifications

Pinout & Package

MAX1415EWE+ is housed in a 16-pin TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal enhancement and ground connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar sigma-delta ADC applications.

Compared with AD7705BRUZ, MAX1415EWE+ reduces BOM count via integrated oscillator and improves noise immunity with buffered inputs; versus ADS1220IPWR, it offers smaller footprint and lower power at 16-bit precision-ideal for cost-sensitive, space-constrained industrial transmitters.

Availability

MAX1415EWE+ is available at Aetrix Electronics and suitable for industrial instruments, weigh scales, and loop-powered systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MAX1415EWE+ 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, medical, and communications applications.

The MAX1415EWE+ belongs to Maxim's high-accuracy sigma-delta ADC product line, engineered specifically for low-noise, low-power sensor signal conditioning in harsh industrial environments.

FAQ

What is the operating temperature range for the MAX1415EWE+?

The MAX1415EWE+ is rated for operation from –40°C to +85°C. This extended industrial temperature range ensures reliable performance in factory automation, outdoor instrumentation, and process control environments where ambient conditions fluctuate significantly. The device maintains its specified INL, gain error, and power consumption across this full range when powered from 2.7V–3.6V.

Does the MAX1415EWE+ require an external crystal to operate?

No, the MAX1415EWE+ does not require an external crystal. It includes an internal oscillator configurable for either 1 MHz or 2.4576 MHz via the CLK bit. An external crystal may be used across CLKIN/CLKOUT for improved frequency stability, but the internal oscillator is sufficient for most industrial applications where ±4% accuracy over temperature is acceptable.

How does the input buffer affect performance in the MAX1415EWE+?

In buffered mode, the MAX1415EWE+ achieves >130 dB common-mode rejection at PGA gain = 128 and extends usable input common-mode range to GND + 50 mV to VDD – 1.5 V. This enables direct connection to high-impedance sources like thermocouples and unbuffered bridge sensors without signal degradation due to source impedance mismatch or noise coupling.

Can the MAX1415EWE+ interface directly with a 3.3V microcontroller SPI port?

Yes, the MAX1415EWE+ is fully compatible with 3.3V microcontrollers. Its digital I/Os (SCLK, DIN, DOUT, CS, DRDY, RESET) meet 3.3V logic thresholds: VIH = 2.0 V (min), VIL = 0.4 V (max), and VOH ≥ VDD – 0.6 V. With VDD = 3.3 V, DOUT and DRDY drive above 2.7 V high, ensuring robust noise margins in noisy industrial PCB layouts.

What calibration capabilities does the MAX1415EWE+ provide?

The MAX1415EWE+ supports on-demand offset and gain self-calibration, as well as system calibration using external reference inputs. It includes user-programmable offset and gain registers, allowing field recalibration without firmware changes. Calibration corrects for drift up to ±0.5 µV/°C offset drift and ±0.5 ppm/°C gain drift, preserving accuracy over temperature and time.