MAX1358B 19-5159 Rev 1 12/10 16-Bit, Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor General Description Features +1.8V to +3.6V Single-Supply Operation The MAX1358B smart data-acquisition system (DAS) is based on a 16-bit, sigma-delta analog-to-digital converter Multichannel, 16-Bit, Sigma-Delta ADC (ADC) and system-support functionality for a micro- 10sps to 477sps Programmable Conversion Rate Self- and System Offset and Gain Calibration processor (P)-based system. This device integrates PGA with Gains of 1, 2, 4, or 8 an ADC, DACs, operational amplifiers, internal selec- Unipolar and Bipolar Modes table-voltage reference, temperature sensors, analog 10-Input Differential Multiplexer switches, a 32kHz oscillator, a real-time clock (RTC) 10-Bit Force-Sense DACs with alarm, a high-frequency-locked loop (FLL) clock, four user-programmable I/Os, an interrupt generator, Uncommitted Op Amps and 1.8V and 2.7V voltage monitors in a single chip. Dual SPDT and SPST Analog Switches The MAX1358B has dual 10:1 differential input multiplex- Selectable References ers (muxes) that accept signal levels from 0 to AV . An 1.25V, 2.048V, and 2.5V DD on-chip 1x to 8x programmable-gain amplifier (PGA) Internal Charge Pump allows measuring low-level signals and reduces external System Support circuitry required. RTC and Alarm Register Internal/External Temperature Sensor The MAX1358B operates from a single +1.8V to +3.6V Internal Oscillator with Clock Output supply and consumes only 1.15mA in normal mode and User-Programmable I/O and Interrupt Generator only 3A in sleep mode. The MAX1358B has two DACs V Monitors DD with one uncommitted op amp. SPI/QSPI/MICROWIRE, 4-Wire Serial Interface The serial interface is compatible with either SPI/QSPI Space-Saving (6mm x 6mm x 0.8mm), 40-Pin or MICROWIRE, and is used to power up, configure, TQFN Package and check the status of all functional blocks. Ordering Information The MAX1358B is available in a space-saving, 40-pin TQFN package and is specified over the commercial PART TEMP RANGE PIN-PACKAGE (0C to +70C) and the extended (-40C to +85C) tem- MAX1358BCTL+ 0C to +70C 40 TQFN-EP* perature ranges. MAX1358BETL+ -40C to +85C 40 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. Applications *EP = Exposed pad. Battery-Powered and Portable Devices Pin Configuration Electrochemical and Optical Sensors Medical Instruments TOP VIEW Industrial Control 30 29 28 27 26 25 24 23 22 21 Data-Acquisition Systems 31 20 OUT1 AIN2 AIN1 32 19 SNC2 REF 33 18 SCM2 34 17 SNO2 REG 35 16 SNC1 CF- MAX1358B CF+ 36 15 SCM1 CPOUT 37 14 SNO1 DV DD 38 13 32KIN 12 32KOUT DGND 39 UPIO1 40 11 RESET *EP + 1 2 3 4 5 6 7 8 9 10 SPI/QSPI are trademarks of Motorola, Inc. TQFN *EXPOSED PAD. 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 Maxims website at www.maxim-ic.com. OUTB CLK UPIO2 FBB SWB UPIO3 AV UPIO4 DD AGND DOUT OUTA SCLK DIN FBA CS SWA IN1+ INT IN1- CLK32K 16-Bit, Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +4V Continuous Current Into Any Pin.........................................50mA DD DV to DGND.........................................................-0.3V to +4V Continuous Power Dissipation (T = +70C) DD A AV to DV ............................................................-4V to +4V 40-Pin TQFN (derate 25.6mW/C above +70C) ....2051.3mW DD DD AGND to DGND.....................................................-0.3V to +0.3V Operating Temperature Range CLK32K to DGND....................................-0.3V to (DV + 0.3V) MAX1358BCTL+ .................................................0C to +70C DD UPIO to DGND........................................................-0.3V to +4V MAX1358BETL+ ..............................................-40C to +85C Digital Inputs to DGND ............................................-0.3V to +4V Junction Temperature......................................................+150C Analog Inputs to AGND ...........................-0.3V to (AV + 0.3V) Storage Temperature Range .............................-65C to +150C DD Digital Output to DGND........................-0.3V to (DV + 0.3V) Soldering Temperature (reflow) .......................................+260C DD Analog Outputs to AGND.........................-0.3V to (AV + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD CPOUT........................................................(DV - 0.3V) to +4V DD 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 (AV = DV = +1.8V to +3.6V, V = +1.25V, external reference, f = 32.768kHz (external clock), C = 10F, C = DD DD REF CLK32K 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 data rate = 10sps to 60sps, PGA gain = 1 Noise-Free Resolution 16 Bits no missing codes, Table 1 (Note 2) Conversion Rate No missing codes, Table 1 10 477 sps Output Noise No missing codes Table 1 Unipolar mode, AV = 3V, DD Integral Nonlinearity INL 0.0046 %FSR PGA gain = 1, data rate = 40sps Uncalibrated 1.0 Unipolar Offset Error (Note 3) or %FSR PGA gain = 1, calibrated, Bipolar Zero Error (Note 2, 3) 0.003 T = +25C, data rate = 10sps A Unipolar Offset-Error or Bipolar Bipolar 1 Zero-Error Temperature Drift V/C (Note 4) Unipolar 1 Uncalibrated 0.6 Gain Error (Notes 3, 5) %FSR PGA = 1, calibrated, data rate = 10sps 0.003 Gain-Error Temperature (Notes 4, 6) 2 ppm/ C Coefficient DC Positive Power-Supply PGA gain = 1, unipolar mode, measured by PSRR 85 dB Rejection Ratio full-scale error with AV = 1.8V to 3.6V DD ADC ANALOG INPUTS (AIN1, AIN2) DC Input Common-Mode CMRR PGA gain = 1, unipolar mode 85 dB Rejection Ratio 2 MAX1358B