EVALUATION KIT AVAILABLE
MAX11311
PIXI, 12-Port Programmable Mixed-Signal I/O with
12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO
General Description
Benefits and Features
● 12 Configurable Mixed-Signal Ports Maximize Design
The MAX11311 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.
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
PIXI ports provide highly flexible hardware configuration
for 12-bit mixed-signal applications. The MAX11311 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 -10V to +10V.
• 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
The MAX11311 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.
● Adapts to Specific Application Requirements and
Allows for Easy Reconfiguration as System Needs
Change
Internal and external temperature measurements monitor
programmable conditions of minimum and maximum tem-
perature 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.
● Configurability of Functions Enables Optimized PCB
Layout
● Reduces BOM Cost with Fewer Components in
Small Footprint
The MAX11311 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 device uses a 4-wire, 20MHz, SPI-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 range of -12.0V to +12.0V.
2
• 25mm 32-Pin TQFN
Ordering Information appears at end of data sheet.
The MAX11311 is available in a 32-pin TQFN, 5mm x 5mm
package or a 48-pin TQFP, 7mm x 7mm package specified
over the -40°C to +105°C temperature range.
Applications
● Base Station RF Power Device Bias Controllers
● System Supervision and Control
● Power-Supply Monitoring
● Industrial Control and Automation
● Control for Optical Components
PIXI is a trademark of Maxim Integrated Products, Inc.
19-8455; Rev 0; 12/15