Analog Devices Inc./Maxim Integrated MAX113CNG+

Overview

MAX113CNG+ from Maxim Integrated is a +3V, 4-channel, 8-bit analog-to-digital converter (ADC) using half-flash architecture to achieve 1.8µs conversion time (400ksps), 1µA power-down current, and integrated track/hold - designed for battery-powered data acquisition in portable instrumentation and system-health monitoring.

For engineers reviewing the MAX113CNG+ datasheet, MAX113CNG+ pinout, MAX113CNG+ application, or MAX113CNG+ equivalent, this page delivers verified electrical specs, validated 24-pin narrow DIP package mapping, confirmed ratiometric reference operation, and real-world timing behavior under burst-mode sampling.

Technical Context

The MAX113CNG+ implements a two-stage half-flash conversion: a 4-bit flash ADC generates MSBs and drives an internal DAC to produce a residue voltage, which a second 4-bit flash stage converts into LSBs - achieving full 8-bit resolution with only 15 comparators. It supports both read mode (MODE = 0) and write-read mode (MODE = 1), with pipelined operation enabled by tying WR and RD together.

Its analog multiplexer selects among four single-ended input channels (IN1–IN4); digital interface uses latched three-state outputs compatible with 8-bit parallel microprocessor buses without external logic. Power-down activation via PWRDN reduces supply current to 1µA typical, with sub-900ns wake-up latency enabling efficient burst-mode sampling.

Key Specifications

Pinout & Package

MAX113CNG+ is housed in a 24-pin narrow plastic DIP (0.300" width), RoHS-compliant and rated for 0°C to +70°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, 8-bit, low-power ADC applications.

Compared with ADS7822U and MAX1113CPE+, the MAX113CNG+ uniquely combines 1.8µs conversion, 1µA power-down, integrated track/hold, and parallel µP interface - making it optimal for burst-mode, microprocessor-based systems requiring minimal latency and lowest active power.

Availability

MAX113CNG+ is available at Aetrix Electronics and suitable for battery-powered systems, portable medical devices, and industrial system-health monitors requiring stable component supply across extended production lifecycles.

Supply support for MAX113CNG+ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.

The MAX113CNG+ belongs to Maxim's legacy precision data-acquisition product line, engineered specifically for low-voltage, low-power, multi-channel ADC applications in portable and embedded instrumentation.

FAQ

What is the operating temperature range for the MAX113CNG+?

The MAX113CNG+ is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with its 24-pin narrow plastic DIP packaging and targets applications such as portable test equipment and consumer-grade data loggers where extended industrial or automotive ranges are not required. The MAX113CNG+ datasheet confirms all electrical parameters are guaranteed within this interval.

Does the MAX113CNG+ support differential input configurations?

No, the MAX113CNG+ supports only four single-ended analog inputs (IN1–IN4). Its functional diagram, pin description, and truth table explicitly define these as ground-referenced channels. Differential or pseudo-differential modes are not implemented - unlike the MAX117 variant, which adds IN5–IN7 and internally hardwires IN8 to REF+. The MAX113CNG+ does not include channel pairing or differential subtraction circuitry.

How does the MAX113CNG+ handle reference voltage connections?

The MAX113CNG+ uses ratiometric reference inputs (REF+ and REF−) to define its full-scale and zero-scale points. REF+ must be between GND and VDD, while REF− sets the lower bound of the input range. The device draws reference current through an internal ~1kΩ resistance between REF+ and REF−, even in power-down mode - requiring careful external switching (e.g., N-channel MOSFET on REF−) to minimize standby current, as documented in the MAX113CNG+ datasheet Figure 7d.

Can the MAX113CNG+ operate with a 5V supply?

No, the MAX113CNG+ is strictly a +3V-family device with absolute maximum VDD of +7V but operational specification limited to +3.0V to +3.6V. Attempting 5V operation violates the Absolute Maximum Ratings and risks permanent damage. For +5V systems, Maxim specifies the pin-compatible MAX114 series - which shares identical functionality but is rated for 4.75V to 5.25V supply and different timing characteristics.

What is the minimum acquisition time (tACQ) required before conversion starts?

The MAX113CNG+ requires a minimum acquisition time (tACQ) of 450ns at TA = +25°C and VDD = +3V, increasing to 700ns across the full 0°C to +70°C range. This interval ensures the internal track/hold fully settles the selected analog input before conversion begins. The tACQ timing is referenced from address-valid assertion (A0–A2 stable) to the falling edge of RD or WR, and is critical for maintaining ≤±1LSB total unadjusted error.