19-5473; Rev 0; 8/10
18-Bit, Single-Channel, Ultra-Low-Power, Delta-
Sigma ADCs with Programmable Gain and GPIO
General Description
Features
S 18-Bit Noise-Free Resolution
The MAX11209/MAX11211 are ultra-low-power (< 300FA
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 sig-
nal inputs from the switched capacitor sampling network
allowing these converters to be used with high-imped-
ance sources without compromising available dynamic
range or linearity. 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 include four GPIOs that can be
used for external mux control. The MAX11209 includes
digital programmable gain of 1 to 128.
S 570nV Noise at 10sps, ±±3.V Input
S ±ppm INL (typ), 15ppm (max)
S No Missing Codes
RMS
FS
S Ultra-Low Power Dissipation
Operating-Mode Current Drain < ±00µA (max)
Sleep-Mode Current Drain < 034µA
S Programmable Gain (1 to 128) (MAX11209)
S Four SPI-Controlled GPIOs for External Mux
Control
S 237V to ±3.V Analog Supply Voltage Range
S 137V to ±3.V Digital and I/O Supply Voltage Range
S Fully Differential Signal and Reference Inputs
S High-Impedance Inputs
Optional Input Buffers on Both Signal and
Reference Inputs
S > 100dB (min) 50Hz/.0Hz Rejection
The MAX11209/MAX11211 operate over the -40NC to
+85NC temperature range, and are available in a 16-pin
QSOP package.
S SPI-, QSPI™-, MICROWIRE™-Compatible Serial
Interface
S On-Demand Offset and Gain Self-Calibration and
System Calibration
Applications
Sensor Measurement (Temperature and
Pressure)
S User-Programmable Offset and Gain Registers
S -40°C to +85°C Operating Temperature Range
S ±2ꢀV ESD Protection
Portable Instrumentation
Battery Applications
Weigh Scales
S Lead(Pb)-Free and RoHS-Compliant QSOP
Pacꢀage
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
MAX11209EEE+
MAX11211EEE+
16 QSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Selector Guide
RESOLUTION
(BITS)
4-WIRE SPI, 1.-PIN QSOP,
PROGRAMMABLE GAIN
4-WIRE SPI,
1.-PIN QSOP
2-WIRE SERIAL,
10-PIN µMAX
MAX11201 (with buffers)
MAX11202 (without buffers)
24
MAX11210
MAX11200
20
18
16
MAX11206
MAX11209
MAX11213
MAX11207
MAX11211
MAX11203
MAX11208
MAX11212
MAX11205
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
_______________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.