MAX11311 Datasheet, PDF (1/51 Pages) Maxim Integrated Products – PIXI, 12-Port Programmable Mixed-Signal I/O with 12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO

MAX11311
EVALUATION KIT AVAILABLE
PIXI, 12-Port Programmable Mixed-Signal I/O with
12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO
General Description
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.
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.
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.
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.
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.
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
Benefits and 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
Small Footprint
• 25mm² 32-Pin TQFN
Ordering Information appears at end of data sheet.
PIXI is a trademark of Maxim Integrated Products, Inc.
19-8455; Rev 0; 12/15