EVALUATION KIT AVAILABLE
MAX11203/MAX11213
16-Bit, Single-Channel, Ultra-Low-Power,
Delta- Sigma ADCs with Programmable Gain
and GPIO
General Description
Benefits and Features
● Minimize Power Consumption with Ultra-Low Power
Dissipation
The MAX11203/MAX11213 are ultra-low-power (< 300µA
active current), high-resolution, serial-output ADCs. These
devices provide the highest resolution per unit power
in the industry, and are optimized for applications that
require very high dynamic range with low power, such
as sensors on a 4mA to 20mA industrial control loop.
Optional input buffers provide isolation of the signal inputs
from the switched capacitor sampling network allowing
these converters to be used with high-impedance sources
without compromising available dynamic range or linear-
ity. The devices provide a high-accuracy internal oscillator
that requires no external components. When used with
the specified data rates, the internal digital filter provides
more than 100dB rejection of 50Hz or 60Hz line noise. The
devices are configurable using the SPI interface and are
available in a 16-pin QSOP package.
• Operating-Mode Current Drain < 300µA (max)
• Sleep-Mode Current Drain < 0.4µA
● Improve Measurement Quality with Excellent DC/AC
Accuracy
• 16-Bit Noise-Free Resolution and No Missing
Codes
• 570nV
Noise at 10sps, 3.6V Input
RMS
FS
• 3ppm INL (typ), 20ppm (max)
● Lower System Cost with Integrated Functionality
• Programmable Gain (1 to 128) (MAX11213)
• Four SPI-Controlled GPIOs for External Mux Control
• Optional Input Buffers on Both Signal and
Reference Inputs
• > 100dB (min) 50Hz/60Hz Rejection
● Increase System Accuracy with Built-in Self
Calibration
Applications
Sensor Measurement (Temperature and Pressure)
Portable Instrumentation
Battery Applications
• On-Demand Offset and Gain Self-Calibration and
System Calibration
• User-Programmable Offset and Gain Registers
Weigh Scales
● Increase System Robustness and Reliability with
2kV ESD Protection
QSPI is a trademark of Motorola, Inc.
• 2.7V to 3.6V Analog Supply Range
• 1.7V to 3.6V Digital and I/O Supply Range
• -40°C to 85°C Operating Temperature Range
MICROWIRE is a registered trademark of National
Semiconductor Corp.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Functional Diagram
CLOCK GENERATOR
CLK
TIMING
AVDD
DVDD
GND
CS
AINP
AINN
DIGITAL LOGIC
AND SERIAL-
INTERFACE
SCLK
DIN
PROGRAMMABLE
GAIN*
DIGITAL FILTER
4
(SINC )
1–128
CONTROLLER
RDY/DOUT
3RD-ORDER
DELTA-SIGMA
MODULATOR
GPIO1
GPIO2
GPIO3
GPIO4
REFP
GPIO
MAX11203
MAX11213*
REFN
19-5334; Rev 2; 12/14