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Número de pieza MAX11311
Descripción 12-Port Programmable Mixed-Signal I/O
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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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

1 page




MAX11311 pdf
MAX11311
PIXI, 12-Port Programmable Mixed-Signal I/O with
12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO
REF Electrical Specifications
(VAVDD = 4.75V to 5.25V, VDVDD = 3.3V, VAVDDIO = +12.0V, VAGND = VDGND = 0V, VAVSSIO = -2.0V, VDACREF = 2.5V, VADCREF = 2.5V
(Internal), fS = 400ksps, 10V analog input range set to range 1 (0 to +10V). TA = -40°C to +105°C, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 2)
PARAMETER
ADC INTERNAL REFERENCE
Reference Output Voltage
REF Output Tempco (Note 6)
Capacitor Bypass at ADC_INT_
REF
SYMBOL
TC-VREF
CONDITIONS
Internal references at TA = +25°C
DAC INTERNAL REFERENCE
Reference Output Voltage
REF Output Tempco (Note 6)
Capacitor Bypass at DAC_REF
DAC EXTERNAL REFERENCE
Reference Input Range
Internal references at TA = +25°C
TC-VREF
MIN TYP MAX UNITS
2.494 2.5 2.506
V
±10 ±25 ppm/°C
4.7 10 µF
2.494 2.5 2.506
V
±10 ±25 ppm/°C
4.7 10 µF
1.25
2.5 V
GPIO Electrical Specifications
(VAVDD = 5.0V, VDVDD = 3.3V, VAVDDIO = +12.0V, VAGND = VDGND = 0V, VAVSSIO = -2.0V, VDACREF = 2.5V, VADCREF = 2.5V (Internal),
fS = 400ksps, 10V analog input range set to range 1 (0 to +10V). TA = -40°C to +105°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
GPIO EXCEPT IN BIDIRECTIONAL LEVEL TRANSLATION MODE
Programmable Input Logic
Threshold
VITH
Input High Voltage
Input Low Voltage
Hysteresis
VIH
VIL
Programmable Output Logic Level VOLVL
MIN TYP MAX UNITS
0.3
VITH +
0.3
0
VDACREF
V
VITH - 0.3
±30
4x
VDACREF
V
V
mV
V
Propagation Delay from GPI Input
to GPO Output in Unidirectional
Level Translating Mode
Midscale threshold, 5V logic swing
2 µs
BIDIRECTIONAL LEVEL TRANSLATION PATH AND ANALOG SWITCH
Input High Voltage
Input Low Voltage
VIH
VIL
1V
0.2 V
On-Resistance
From VAVSSIO +2.50V to VAVDDIO - 2.50V
60 Ω
www.maximintegrated.com
Maxim Integrated 5

5 Page





MAX11311 arduino
MAX11311
PIXI, 12-Port Programmable Mixed-Signal I/O with
12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO
Recommended VDDIO/VSSIO Supply Selection (continued)
● If one or more ports are in mode 11 or 12 (Analog Switch-related modes), VAVSSIO must be set, at maximum, to
2.0V below the value of the lowest voltage applied to any of the ports functioning as analog switch terminals.
● VAVSSIO cannot be set higher than VAGND.
For example, the MAX11311 can operate with only one voltage supply of 5V (±5%) connected to AVDD, AVDDIO, and
DVDD, and one ground of 0V connected to AGND, DGND, and AVSSIO. However, the level of performance presented
in the electrical specifications requires the setting of the supplies connected to AVDDIO and AVSSIO as previously
described.
Common PIXI Electrical Specifications
(VAVDD = 4.75V to 5.25V, VDVDD = 3.3V, VAVDDIO = +12.0V, VAGND = VDGND = 0V, VAVSSIO = -2.0V, VDACREF = 2.5V, VADCREF = 2.5V
(Internal), fS = 400ksps, 10V analog input range set to range 1 (0 to +10V). TA = -40°C to +105°C, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 2)
PARAMETER
PIXI PORTS
Input Capacitance
Input Resistance
SYMBOL
CONDITIONS
All PIXI ports
All PIXI input ports except ADC mode
Startup Time
Between stable supplies and accessing
registers
HIGH-VOLTAGE OUTPUT DRIVER CHARACTERISTICS
MIN
50
TYP
MAX
UNITS
20
75 100
100
pF
ms
Maximum Output Capacitance
250 pF
Output Low Voltage, DAC Mode
Sinking 25mA, VAVSSIO = 0V,
AVDDIO = 10V
VAVSSIO
+ 1.0
V
Output High Voltage, DAC Mode
Sourcing 25mA, VAVSSIO = 0V,
VAVDDIO = 10V
VAVDDIO
- 1.5
V
Output Low Voltage, GPO Mode
Sinking 2mA, VAVSSIO = 0V,
VAVDDIO = 10V
VAVSSIO
+ 0.4
V
Output High Voltage, GPO Mode
Current Limit
Sourcing 2mA, VAVSSIO = 0V,
VAVDDIO = 10V
Short to AVDDIO
Short to AVSSIO
VAVDDIO
– 0.4
75
75
V
mA
mA
Note 2: Electrical specifications are production tested at TA = +25°C. Specifications over the entire operating temperature range are
guaranteed by design and characterization. Typical specifications are at TA = +25°C.
Note 3: DC accuracy specifications are tested for single-ended ADC inputs only.
Note 4: The effective ADC sample rate for port X configured in mode 6, 7, or 8 is:
[ADC sample rate per ADCCONV]/(([number of ports in modes 6,7,8] + [1 if TMPSEL ≠ 000]) x [2# OF SAMPLES for port X])
Note 5: See the Recommended VDDIO/VSSIO Supply Selection table for each range. For ports in modes 6, 7, 8, or 9, the voltage
applied to those ports must be within the limits of their selected input range, whether in single-ended or differential mode.
Note 6: Specification is guaranteed by design and characterization.
Note 7: Switch controlled by GPI-configured port. One switch terminal connected to 0V, the other terminal connected to 5V through
a 5mA current source. Timing is measured at the 2.5V transition point. Turn-on and turn-off delays are measured from the
edge of the control signal to the 2.5V transition point. Turn-on and turn-off durations are measured between control signal
transitions.
Note 8: In DAC-related modes, the rate, at which PIXI ports configured in mode 1, 3, 4, 5, 6, or 10 are refreshed, is as follows:
1/(40µs x [number of ports in modes 1, 3, 4, 5, 6, 10])
Note 9: Typical (TYP) values represent the errors at the extremes of the given temperature range.
www.maximintegrated.com
Maxim Integrated 11

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