MAX11359A 16-Bit Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor General Description Features +1.8V to +3.6V Single-Supply Operation The MAX11359A smart data-acquisition systems (DAS) is based on a 16-bit, sigma-delta analog-to-digital converter Multichannel 16-Bit Sigma-Delta ADC 10sps to 512sps Programmable Conversion Rate (ADC) and system-support functionality for a micro- Self and System Offset and Gain Calibration processor (P)-based system. The device integrates an PGA with Gains of 1, 2, 4, or 8 ADC, DAC, operational amplifiers, internal selectable- Unipolar and Bipolar Modes voltage reference, temperature sensors, analog switch- 10-Input Differential Multiplexer es, a 32kHz oscillator, a real-time clock (RTC) with 10-Bit Force-Sense DACs alarm, a high-frequency-locked loop (FLL) clock, four Uncommitted Op Amps user-programmable I/Os, an interrupt generator, and Dual SPDT Analog Switches 1.8V and 2.7V voltage monitors in a single chip. Selectable References The MAX11359A has dual 10:1 differential input multiplex- 1.25V, 1.996V and 2.422V ers (muxes) that accept signal levels from 0 to AVDD. An Internal Charge Pump on-chip 1x to 8x programmable-gain amplifier (PGA) System Support allows measuring low-level signals and reduces external Real-Time Clock and Alarm Register circuitry required. Internal/External Temperature Sensor Internal Oscillator with Clock Output The MAX11358B operates from a single +1.8V to +3.6V User-Programmable I/O and Interrupt Generator supply and consumes only 1.4mA in normal mode and V Monitors DD only 6.1A in sleep mode. The MAX11385B has one SPI/QSPI/MICROWIRE, 4-Wire Serial Interface DACs with two uncommitted op amp. Space-Saving (6mm x 6mm x 0.75mm), 40-Pin TQFN The serial interface is compatible with either SPI/QSPI Package or MICROWIRE , and is used to power up, configure, Ordering Information and check the status of all functional blocks. The MAX11359A is available in a space-saving, 40-pin PART TEMP RANGE PIN-PACKAGE TQFN package and is specified over the commercial MAX11359AETL+ -40C to +85C 40 TQFN-EP** (0C to +70C) and the extended (-40C to +85C) tem- MAX11359ACTL+* 0C to +70C 40 TQFN-EP** perature ranges. +Denotes a lead(Pb)-free/RoHScompliant package. *Future productcontact factory for availability. Applications **EP = Exposed pad. Battery-Powered and Portable Devices Electrochemical and Optical Sensors Pin Configuration Medical Instruments TOP VIEW Industrial Control Data-Acquisition Systems 30 29 28 27 26 25 24 23 22 21 OUT1 AIN2 31 20 AIN1 32 19 SNC2 33 18 SCM2 REF 34 17 SNO2 REG CF- 35 16 SNC1 MAX11359A CF+ 36 15 SCM1 CPOUT 37 14 SNO1 QSPI is a trademark of Motorola, Inc. MICROWIRE is a registered trademark of National Semiconductor Corp. DVDD 38 13 32KIN DGND 39 12 32KOUT UPIO1 40 11 RESET *EP + 1 2 3 4 5 6 7 8 9 10 TQFN *CONNECT EP TO AGND OR LEAVE UNCONNECTED. For pricing, delivery, and ordering information, please contact Maxim Direct 19-4594 Rev 1 1/12 at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. OUT2 CLK IN2- UPIO2 IN2+ UPIO3 UPIO4 AVDD DOUT AGND OUTA SCLK FBA DIN SWA CS INT IN1+ CLK32K IN1- MAX11359A 16-Bit Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ABSOLUTE MAXIMUM RATINGS AVDD to AGND ........................................................-0.3V to +4V Continuous Current Into Any Pin.........................................50mA DVDD to DGND ........................................................-0.3V to +4V Continuous Power Dissipation (T = +70C) A AVDD to DVDD ...........................................................-4V to +4V 40-Pin TQFN (derate 25.6mW/C above +70C) ....2051.3mW AGND to DGND.....................................................-0.3V to +0.3V Operating Temperature Range CLK32K to DGND ..................................-0.3V to (V + 0.3V) MAX11358 CTL+.............................................0C to +70C DVDD UPIO to DGND........................................................-0.3V to +4V MAX11358 ETL+ ..........................................-40C to +85C Digital Inputs to DGND ............................................-0.3V to +4V Junction Temperature......................................................+150C Analog Inputs to AGND..........................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C AVDD Digital Output to DGND ......................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DVDD Analog Outputs to AGND.......................-0.3V to (V + 0.3V) AVDD 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 = V = +1.8V to +3.6V, V = +1.25V, external reference, CLK32K = 32.768kHz (external clock), C = 10F, C = AVDD DVDD REF REG CPOUT 10F, 10F between CF+ and CF-, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ADC DC ACCURACY Data rate = 10sps, PGA gain = 2 Noise-Free Resolution data rate = 10sps to 60sps, PGA gain = 1 16 Bits no missing codes, Table 1 (Note 2) Conversion Rate No missing codes, Table 1 10 512 sps Output Noise No missing codes Table 1 V RMS Unipolar mode, V = 3V, PGA gain = 1, AVDD Integral Nonlinearity INL 0.004 %FSR T = +25C, data rate = 50sps A Uncalibrated 1.0 Unipolar Offset Error or Bipolar %FSR PGA gain = 1, calibrated, Zero Error (Note 3) 0.003 T = +25C, data rate = 50sps A Unipolar Offset-Error or Bipolar Bipolar 2.0 Zero-Error Temperature Drift V/C Unipolar 10 (Note 4) Uncalibrated 0.6 Gain Error (Notes 3, 5) %FSR PGA = 1, calibrated, data rate = 50sps 0.003 Gain-Error Temperature (Notes 4, 6) 1.0 ppm/C Coefficient DC Positive Power-Supply PGA gain = 1, unipolar mode, measured by PSRR 73 dB Rejection Ratio full-scale error with V = 1.8V to 3.6V AVDD ADC ANALOG INPUTS (AIN1, AIN2) DC Input Common-Mode CMRR PGA gain = 1, unipolar mode 85 dB Rejection Ratio Maxim Integrated 2