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MAX11312：PIXI, 12-Port Programmable Mixed-Signal I/O with 12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO

Industry's First Configurable High-Voltage Mixed Signal I/O Allows User-Defined ADC, DAC, or GPIO Functionality

The MAX11312 integrates a PIXI™, 12-bit, multichannel, analog-to-digital converter (ADC) and a 12-bit, multichannel, buffered digital-to-analog converter (DAC) in a single integrated circuit. This device offers 12 mixed-signal high-voltage, bipolar ports, which are configurable as an ADC analog input, a DAC analog output, a general purpose input (GPI), a general-purpose output (GPO), or an analog switch terminal. One internal and two external temperature sensors track junction and environmental temperature. Adjacent pairs of ports are configurable as a logic-level translator for open-drain devices or an analog switch. PIXI ports provide highly flexible hardware configuration for 12-bit mixed-signal applications. The MAX11312 is best suited for applications that demand a mixture of analog and digital functions. Each port is individually configurable with up to four selectable voltage ranges within the -10V to +10V range. The device allows for the averaging of 2, 4, 8, 16, 32, 64, or 128 ADC samples from each ADC-configured port to improve noise performance. A DAC-configured output port can drive up to 25mA. The GPIO ports can be programmed to user-defined logic levels, and a GPI coupled with a GPO forms a logic-level translator. Internal and external temperature measurements monitor programmable conditions of minimum and maximum temperature limits, using the interrupt to notify the host if one or more conditions occur. The temperature measurement results are made available through the serial interface. The device features an internal, low-noise 2.5V voltage reference and provides the option to use external voltage references with separate inputs for the DAC and ADC. The MAX11312 uses a 400kHz I²C-compatible serial interface, operating from a 5V analog supply and a 1.8V to 5.0V digital supply. The PIXI port supply voltages operate from a wide -12.0V to +12.0V. The MAX11312 is available in a 32-pin TQFN, 5mm x 5mm package specified over the -40°C to +105°C temperature range.

Key Features 12 Configurable Mixed-Signal Ports Maximize Design Flexibility Across Platforms Up to 12 12-Bit ADC Inputs Single-Ended, Differential, or Pseudo-Differential Range Options: 0 to 2.5V, ±5V, 0 to +10V, -10V to 0V Programmable Sample Averaging Per ADC Port Unique Voltage Reference for Each ADC PIXI Port Up to 12 12-Bit DAC Outputs Range Options: ±5V, 0 to +10V, -10V to 0V 25mA Current Drive Capability with Overcurrent Protection Up to 12 General-Purpose Digital I/Os 0 to +5V GPI Input Range 0 to +2.5V GPI Programmable Threshold Range 0 to +10V GPO Programmable Output Range Logic-Level-Shifting Between Any Two Pins 60Ω Analog Switch Between Adjacent PIXI Ports Internal/External Temperature Sensors, ±1°C Accuracy Adapts to Specific Application Requirements and Allows for Easy Reconfiguration as System Needs Change Configurability of Functions Enables Optimized PCB Layout Reduces BOM Cost with Fewer Components in a Small Footprint 25mm2 32-Pin TQFN

MAX11312: Functional Diagram Applications/Uses Base-Station RF Power Device Bias Controllers Control for Optical Components Industrial Control and Automation Power-Supply Monitoring System Supervision and Control

DataSheet

Parametrics

Design kits & evaluation modules

• MAX11312PMB
• MAX11312SYS1

Quality and Environmental Data

• MAX11312.pdf

Ordering Information