Analog Devices Inc./Maxim Integrated MAX1179BEUI+

Overview

MAX1179BEUI+ from Maxim Integrated is a 16-bit, 135ksps successive-approximation ADC with ±5V bipolar analog input range, single +4.75V to +5.25V analog supply, and 16-bit parallel interface. It features ±2LSB INL (max), -100dB THD, and AutoShutdown™ reducing current to 0.4mA at 10ksps - used in precision industrial process control and temperature monitoring systems.

For engineers reviewing the MAX1179BEUI+ datasheet, MAX1179BEUI+ pinout, MAX1179BEUI+ application, or MAX1179BEUI+ equivalent, this page delivers verified electrical specs, package mapping, real-world use cases, and validated alternative parts for high-accuracy data-acquisition design.

Technical Context

The MAX1179BEUI+ implements a SAR architecture with integrated track-and-hold, internal +4.096V reference, and factory-trimmed clock. Its input scaler enables true ±5V operation from a single 5V analog rail while maintaining 16-bit resolution and monotonicity.

Control logic uses three CS falling edges: first powers up acquisition, second initiates conversion, third loads data onto D0–D15 bus when R/C is high. Power-down mode selection (standby vs. shutdown) is determined by R/C state during the second CS edge.

Key Specifications

Pinout & Package

MAX1179BEUI+ is housed in a 28-pin TSSOP package (4.4mm × 9.7mm, 0.65mm pitch), optimized for compact PCB layouts and thermal performance in high-density data-acquisition modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1179BEUI+, ADS8860IDRCT offers higher throughput but demands external signal conditioning and lacks native ±5V support, while AD7682BRMZ provides integrated reference and smaller footprint but requires external amplification for ±5V sensor signals - making MAX1179BEUI+ optimal for direct-connect industrial analog input channels.

Availability

MAX1179BEUI+ is available at Aetrix Electronics and suitable for industrial process control, temperature monitoring, and portable data-acquisition systems requiring stable component supply and long-term production continuity.

Supply support for MAX1179BEUI+ 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 MAX1179BEUI+ belongs to Maxim's high-accuracy SAR ADC product line, engineered specifically for battery-powered and industrial data-acquisition systems demanding ±5V bipolar input, low power, and minimal external components.

FAQ

What is the maximum sampling rate of the MAX1179BEUI+?

The MAX1179BEUI+ achieves a maximum sampling rate of 135ksps, corresponding to a Nyquist frequency of 67.5kHz. This rate is guaranteed across the full -40°C to +85°C operating temperature range with both internal and external reference configurations, and is supported by the device's 4.7µs max conversion time and 2µs acquisition time.

Does the MAX1179BEUI+ require an external reference voltage?

No, the MAX1179BEUI+ includes a factory-trimmed internal +4.096V reference with ±35ppm/°C tempco, fully usable out-of-the-box. External references (3.8V–4.2V) may be applied at REF or REFADJ for improved stability or custom scaling, but are optional - the internal reference eliminates BOM cost and layout area in most applications.

What is the meaning of the 'B' grade in MAX1179BEUI+?

The 'B' in MAX1179BEUI+ denotes the INL specification grade: ±2LSB maximum over temperature, per the datasheet's ordering table. This grade applies to both commercial (0°C to +70°C) and extended (-40°C to +85°C) temperature ranges, distinguishing it from 'A' (±1.5LSB) and 'C' (±4LSB) grades within the same family.

How does AutoShutdown™ operate in the MAX1179BEUI+?

AutoShutdown™ in the MAX1179BEUI+ is controlled by the R/C pin state during the second falling edge of CS. When R/C is high, the internal reference and buffer power down after conversion, reducing total supply current to 0.4mA at 10ksps. Recovery requires ≥12ms for reference settling before next conversion - a trade-off between power savings and latency.

Can the MAX1179BEUI+ interface directly with 3.3V microcontrollers?

Yes, the MAX1179BEUI+ supports digital logic supplies from +2.7V to +5.25V on DVDD, allowing direct connection to 3.3V microcontrollers. Its VOH (DVDD − 0.4V min) and VOL (0.4V max) meet 3.3V logic thresholds, and its 15pF input capacitance ensures clean timing with standard MCU GPIO drivers - no level-shifting required.