Analog Devices Inc./Maxim Integrated MAX113CAG+T

Overview

MAX113CAG+T from Maxim Integrated is a +3V, 4-channel, 8-bit analog-to-digital converter (ADC) using half-flash architecture for 1.8µs conversion time (400ksps), featuring internal track/hold, ratiometric reference support, and 1µA power-down mode - deployed in battery-powered remote data acquisition and portable system-health monitoring.

For engineers reviewing the MAX113CAG+T datasheet, MAX113CAG+T pinout, MAX113CAG+T application, or MAX113CAG+T equivalent, this page delivers verified electrical specs, validated 24-pin SSOP package mapping, confirmed microprocessor-compatible parallel interface behavior, and real-world timing constraints for burst-mode embedded ADC integration.

Technical Context

The MAX113CAG+T implements a two-stage half-flash conversion: first a 4-bit flash ADC generates MSBs and a residue voltage, then an internal DAC and second 4-bit flash stage resolve LSBs - achieving 8-bit resolution with ≤1LSB total unadjusted error. Its analog multiplexer selects among four single-ended inputs under A0–A2 address control.

Digital interface operates in Read Mode (MODE = GND) or Write-Read Mode (MODE = VDD), supporting memory-mapped or I/O-port access without external logic. WR/RDY serves dual function: write-control input or ready-status open-collector output, while INT signals conversion completion with sub-1µs latency.

Key Specifications

Pinout & Package

MAX113CAG+T is housed in a 24-pin shrink small-outline package (SSOP), 0.154" wide, with 0.025" pitch - footprint-compatible with industry-standard 24-SSOP PCB land patterns and reflow soldering profiles.

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 MAX113CNG+, the MAX113CAG+T offers identical electrical performance in a space-saving SSOP package ideal for volume SMT production; versus ADS7822U, it provides faster parallel interface throughput and hardware-based ratiometric operation but demands more PCB real estate and GPIO resources.

Availability

MAX113CAG+T is available at Aetrix Electronics and suitable for battery-powered systems, portable equipment, and system-health monitoring requiring stable component supply across industrial temperature ranges and long-term production continuity.

Supply support for MAX113CAG+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 and mixed-signal ICs for power, sensing, and connectivity applications - known for high-reliability, low-power solutions in harsh environments.

The MAX113CAG+T belongs to Maxim's legacy low-voltage ADC family targeting portable and remote instrumentation; engineered specifically for single-supply, microamp-power, burst-mode data acquisition with minimal external components.

FAQ

What is the operating temperature range of the MAX113CAG+T?

The MAX113CAG+T is specified for 0°C to +70°C ambient operation - matching the 'C' grade suffix in its ordering code. This commercial-grade range suits indoor portable equipment and non-automotive industrial applications where enclosure temperature remains controlled. The device maintains full 8-bit linearity and ≤1LSB total unadjusted error across this range, with supply current increasing only modestly from 1.5mA to 3.5mA as temperature rises.

Does the MAX113CAG+T support true differential input channels?

No, the MAX113CAG+T does not support true differential inputs. It provides four single-ended analog inputs (IN1–IN4) referenced to GND or REF−. While the transfer function is ratiometric and the REF− pin can be set above GND to shift the input range, each channel measures voltage relative to the common REF− node - not as a differential pair. For differential measurement, external instrumentation amplifiers must condition signals prior to connection to IN1–IN4.

Can the MAX113CAG+T operate with a 2.5V reference voltage?

Yes, the MAX113CAG+T supports 2.5V reference operation: REF+ may be set between GND + 0.3V and VDD, and REF− may be set from GND to REF+. Using a 2.5V reference (e.g., MAX6126) with REF− = GND yields a 0V–2.5V input range and 9.77mV/LSB step size. However, the internal reference resistance (~1kΩ) draws current continuously - so for ultra-low-power use, consider switching REF− with an N-channel MOSFET as shown in Figure 7d of the datasheet.

How does the power-down mode affect the reference inputs of the MAX113CAG+T?

In power-down mode (PWRDN = low), the MAX113CAG+T reduces VDD current to 1µA, but the internal 1kΩ reference resistor between REF+ and REF− remains active - drawing current even when the core ADC is disabled. This continuous current path can drain batteries in long sleep periods. To eliminate it, the datasheet recommends switching REF− with an N-channel MOSFET (e.g., IRML2402) controlled by PWRDN, breaking the reference loop during shutdown while preserving fast wake-up capability.

Is the MAX113CAG+T pin-compatible with the MAX117 series?

No, the MAX113CAG+T is not pin-compatible with any MAX117 variant. The MAX113 uses a 24-pin package with only A0/A1 address lines and IN1–IN4 inputs, while the MAX117 requires 28 pins to accommodate A2, IN5–IN8, and additional routing. Pin functions differ significantly - for example, MAX117 Pin 25 is IN5, but that pin number does not exist on the 24-pin MAX113CAG+T. Board redesign is required to migrate between these families.