MAX11201 19-5333 Rev 0 6/10 24-Bit, Single-Channel, Ultra-Low-Power, Delta Sigma ADC with 2-Wire Serial Interface General Description Features The MAX11201 is an ultra-low-power (< 320FA max S 23.3-Bit ENOB active current), high-resolution, serial-output ADC. This 20.6-Bit Noise-Free Resolution at 13.75sps device provides the highest resolution per unit power in 19.1-Bit Noise-Free Resolution at 120sps the industry and is optimized for applications that require S 700nV Noise 3.6V Input (MAX11201B) RMS FS very high dynamic range with low power such as sensors S INL: 3ppm (typ), 10ppm (max) on a 4mA to 20mA industrial control loop. The MAX11201 S No Missing Codes provides a high-accuracy internal oscillator that requires no external components. S Ultra-Low Power Dissipation Operating Mode Current Drain < 320A (max) When used with the specified data rates, the internal digital Sleep Mode Current Drain < 0.4A filter provides more than 100dB rejection of 50Hz or 60Hz line noise. The MAX11201 provides a simple 2-wire serial S 2.7V to 3.6V Analog Supply Voltage Range M interface in the space-saving, 10-pin FMAX package. S 1.7V to 3.6V Digital and I/O Supply Voltage Range The MAX11201 operates over the -40NC to +85NC tem- S Fully Differential Signal and Reference Inputs perature range. S High-Impedance Inputs Buffers on Signal Inputs Applications S Programmable Internal System Clock or External Sensor Measurement Portable Instrumentation Clock (Temperature and Battery Applications 2.4576MHz (MAX11201A) Pressure) 2.25275MHz (MAX11201B) Weigh Scales S > 100dB (min) 50Hz/60Hz Rejection (MAX11201B) Ordering Information S Serial 2-Wire Interface (Clock Input and Data Output) S On-Demand Offset and Gain Self-Calibration OUTPUT RATE PART PIN-PACKAGE (sps) S -40C to +85C Operating Temperature Range MAX11201AEUB+ 10 FMAX 120 S 2kV ESD Protection MAX11201BEUB+ 10 FMAX 13.75 S Lead(Pb)-Free and RoHS-Compliant MAX Package Note: All devices are specified over the -40C to +85C oper- ating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. Selector Guide RESOLUTION 4-WIRE SPI, 16-PIN QSOP, 4-WIRE SPI, 2-WIRE SERIAL, (BITS) PROGRAMMABLE GAIN 16-PIN QSOP 10-PIN MAX MAX11201 (with buffers) 24 MAX11210 MAX11200 MAX11202 (without buffers) 20 MAX11206 MAX11207 MAX11208 18 MAX11209 MAX11211 MAX11212 16 MAX11213 MAX11203 MAX11205 MAX is a registered trademark of Maxim Integrated Products, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE24-Bit, Single-Channel, Ultra-Low-Power, Delta Sigma ADC with 2-Wire Serial Interface ABSOLUTE MAXIMUM RATINGS Any Pin to GND ....................................................-0.3V to +3.9V Continuous Power Dissipation (T = +70NC) A AVDD to GND .......................................................-0.3V to +3.9V 10-Pin FMAX (derate 5.6mW/NC above +70NC) ..........444mW DVDD to GND ......................................................-0.3V to +3.9V Operating Temperature Range .......................... -40NC to +85NC Analog Inputs (AINP, AINN, REFP, REFN) Junction Temperature .....................................................+150NC to GND .............................................. -0.3V to (V + 0.3V) Storage Temperature Range ............................ -55NC to +150NC AVDD Lead Temperature (soldering, 10s) ................................+300NC Digital Inputs and Digital Outputs Soldering Temperature (reflow) ......................................+260NC to GND .............................................. -0.3V to (V + 0.3V) DVDD ESD (AVDD, AINP, AINN, REFP, REFN, DVDD, CLK, SCLK, HB RDY/DOUT, GND) ............................................ Q2kV (Note 1) Note 1: Human Body Model to specification MIL-STD-883 Method 3015.7. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.6V, V = +1.7V, V - V = V internal clock, T = T to T , unless otherwise noted. Typical values AVDD DVDD REFP REFN AVDD A MIN MAX are at T = +25NC under normal conditions, unless otherwise noted.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ADC PERFORMANCE MAX11201A 19.1 Noise-Free Resolution NFR Bits (Notes 2, 3) MAX11201B 20.6 MAX11201A 2.0 Noise (Notes 2, 3) V FV N RMS MAX11201B 0.70 Integral Nonlinearity INL (Note 4) -10 +10 ppmFSR Zero Error V After calibration, V - V = 2.5V -10 +10 ppmFSR OFF REFP REFN Zero Drift 50 nV/NC After calibration, V - V = 2.5V REFP REFN Full-Scale Error -20 +20 ppmFSR (Note 5) ppmFSR/ Full-Scale Error Drift 0.05 NC AVDD DC rejection 70 80 Power-Supply Rejection dB DVDD DC rejection 90 100 ANALOG INPUTS/REFERENCE INPUTS DC rejection 90 123 Common-Mode Rejection CMR 50Hz/60Hz rejection, MAX11201A 90 dB 50Hz/60Hz rejection, MAX11201B 144 Normal-Mode 50Hz Rejection NMR MAX11201B (Note 6) 100 144 dB 50 Normal-Mode 60Hz Rejection NMR MAX11201B (Note 6) 100 144 dB 60 Common-Mode Voltage Range GND V V AVDD V + GND Low input voltage 100mV Absolute Input Voltage V V - AVDD High input voltage 100mV DC Input Leakage Sleep mode (Note 2) Q1 FA 2 MAX11201