MAX11202 24-Bit, Single-Channel, Ultra-Low-Power, Delta Sigma ADC with 2-Wire Serial Interface General Description Features S 24-Bit Full-Scale Resolution The MAX11202 is an ultra-low-power (< 300FA max 20.5-Bit Noise-Free Resolution at 13.75sps active current), high-resolution, serial output ADC. This 19-Bit Noise-Free Resolution at 120sps device provides the highest resolution per unit power in S 720nV Noise (MAX11202B) RMS the industry and is optimized for applications that require very high dynamic range with low power such as sensors S 3ppm INL on a 4mA to 20mA industrial control loop. The MAX11202 S No Missing Codes provides a high-accuracy internal oscillator that requires S Ultra-Low Power Dissipation no external components. Operating Mode Current Drain < 300A (max) Sleep Mode Current Drain < 0.1A When used with the specified data rates, the internal digital S 2.7V to 3.6V Analog Supply Voltage Range filter provides more than 80dB rejection of 50Hz or 60Hz line noise. The MAX11202 provides a simple 2-wire serial S 1.7V to 3.6V Digital and I/O Supply Voltage Range M interface in the space-saving, 10-pin FMAX package. S Fully Differential Signal Inputs The MAX11202 operates over the -40NC to +85NC tem- S Fully Differential Reference Inputs perature range. S Internal System Clock 2.4576MHz (MAX11202A) Applications 2.2528MHz (MAX11202B) Sensor Measurement (Temperature and S External Clock Pressure) S Serial 2-Wire Interface (Clock Input and Data Output) Portable Instrumentation S On-Demand Offset and Gain Self-Calibration Battery Applications S -40C to +85C Operating Temperature Range S 2kV ESD Protection Weigh Scales S Lead(Pb)-Free and RoHS-Compliant MAX Package Ordering Information OUTPUT RATE PART PIN-PACKAGE (sps) MAX11202AEUB+ 120 10 FMAX MAX11202BEUB+ 10 FMAX 13.75 Note: All devices are specified over the -40NC to +85NC 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. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-5237 Rev 0 4/10MAX11202 24-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 = +1.8V, 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 MAX11202A 19 Noise-Free Resolution (Notes 2, 3) NFR Bits MAX11202B 20.5 MAX11202A 2.1 Noise (Notes 2, 3) V FV N RMS MAX11202B 0.72 Integral Nonlinearity INL (Note 4) -10 +10 ppmFSR Zero Error V After calibration, V - V = 2.5V -13 1 +13 ppmFSR OFF REFP REFN Zero Drift 50 nV/NC After calibration, V - V = 2.5V REFP REFN Full-Scale Error -30 3 +30 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, MAX11202A 90 dB 50Hz/60Hz rejection, MAX11202B 144 Normal-Mode 50Hz Rejection NMR MAX11202B (Note 6) 65 80.5 dB 50 Normal-Mode 60Hz Rejection NMR MAX11202B (Note 6) 73 87 dB 60 Common-Mode Voltage Range GND V V AVDD GND - Low input voltage 30mV Absolute Input Voltage V V AVDD High input voltage + 30mV DC Input Leakage Sleep mode (Note 2) Q1 FA AIN Dynamic Input Current 5 FA REF Dynamic Input Current 7.5 FA 2 Maxim Integrated