MAX1329/MAX1330 19-4252 Rev 1 10/08 12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs, Reference, Voltage Monitors, and Temp Sensor General Description Features The MAX1329/MAX1330 are smart data acquisition sys- 1.8V to 3.6V Single Digital Supply Operation tems (DASs) based on a successive approximation Internal Charge Pump for Analog Circuits (2.7V to register (SAR) analog-to-digital converter (ADC). These 5.5V) devices are highly integrated, offering an ADC, digital- to-analog converters (DACs), operational amplifiers (op 12-Bit SAR ADC amps), voltage reference, temperature sensors, and 12 Bits, 312ksps, No Missing Codes analog switches in the same device. 16 Bits, 1000sps, DSP Mode The MAX1329/MAX1330 offer a single ADC with a refer- 16-Word FIFO and 20-Bit Accumulator ence buffer. The ADC is capable of operating in one of PGA with Gains of 1, 2, 4, and 8 two user-programmable modes. In normal mode, the Unipolar and Bipolar Modes ADC provides up to 12 bits of resolution at 312ksps. In 16-Input Differential Multiplexer DSP mode, the ADC provides up to 16 bits of resolution at 1000sps. The ADC accepts one external differential Dual 12-Bit Force-Sense DACs input or two external single-ended inputs as well as 16-Word FIFO (DACA Only) inputs from other circuitry on-board. An on-chip pro- Independent Voltage References for ADC and DACs grammable gain amplifier (PGA) follows the analog Internal 2.5V Reference inputs, reducing external circuitry requirements. The PGA gain is adjustable from 1V/V to 8V/V. Adjustable Reference Buffers Provide 1.25V, 2.048V, or 2.5V The MAX1329/MAX1330 operate from a 1.8V to 3.6V dig- ital power supply. Shutdown and sleep modes are avail- System Support able for power-saving applications. Under normal ADC Alarm Register operation, an internal charge pump boosts the supply Uncommitted Op Amps voltage for the analog circuitry when the supply is < 2.7V. Dual SPDT Analog Switches The MAX1329/MAX1330 offer four analog programmable Internal/External Temperature Sensor I/Os (APIOs) and four digital programmable I/Os Internal Oscillator with Clock I/O (DPIOs). The APIOs can be configured as general-pur- Digital Programmable I/O pose logic inputs and outputs, as a wake-up function, or Analog Programmable I/O as a buffer and level shifter for the serial interface to Programmable Interrupts communicate with slave devices powered by the analog supply, AV . The DPIOs can be configured as general- Accurate Supply Voltage Measurement DD purpose logic inputs and outputs as well as inputs to Programmable Dual Voltage Monitors directly control the ADC conversion rate, the analog SPI-/QSPI-/MICROWIRE-Compatible, 4-Wire Serial switches, the loading of the DACs, wake-up, sleep, and Interface shutdown modes, and as an interrupt for when the ana- log-to-digital conversion is complete. Space-Saving, 6mm x 6mm, 40-Pin Thin QFN Package The MAX1329 includes dual 12-bit force-sense DACs with a programmable reference buffer and one op amp. The MAX1330 provides one 12-bit force-sense DAC with Ordering Information a programmable reference buffer and two op amps. For the MAX1329/MAX1330, a 16-word DAC FIFO can be PART TEMP RANGE PIN-PACKAGE used with the DACA for direct digital synthesis (DDS) M A X13 2 9 BETL + -40C to +85C 40 Thin QFN-EP** of waveforms. M A X13 3 0 BETL + * -40C to +85C 40 Thin QFN-EP** The 4-wire serial interface is compatible with SPI, QSPI, and MICROWIRE. *Future productcontact factory for availability. **EP = Exposed pad. Applications +Denotes a lead-free/RoHS-compliant package. Battery-Powered and Portable Devices Electrochemical and Optical Sensors Pin Configurations appear at end of data sheet. Medical Instruments Industrial Control Data Acquisition Systems Low-Cost CODECs SPI/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 Maxims website at www.maxim-ic.com.12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs, Reference, Voltage Monitors, and Temp Sensor ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +6V AGND to DGND.................................................... -0.3V to +0.3V DD DV to DGND.........................................................-0.3V to +6V Continuous Current into Any Pin.......................................50mA DD Analog Inputs to AGND....................................-0.3V to the lower Continuous Power Dissipation (T = +70C) A of (AV + 0.3V) or +6V 40-Pin Thin QFN (derate 37mW/C above +70C) ....2963mW DD Digital Inputs to DGND.....................................-0.3V to the lower Operation Temperature Range............................-40C to +85C of (DV + 0.3V) or +6V Storage Temperature Range .............................-65C to +150C DD Analog Outputs to AGND.................................-0.3V to the lower Junction Temperature......................................................+150C of (AV + 0.3V) or +6V Lead Temperature (soldering, 10s) ................................+300C DD Digital Outputs to DGND..................................-0.3V to the lower of (DV + 0.3V) or 6V 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 (DV = 1.8V to 3.6V, AV = 2.7V to 5.5V, V = V = 2.5V, external reference 10F capacitor at REFADC and REFDAC DD DD REFDAC REFADC 0.01F capacitor at REFADJ T = T to T , unless otherwise noted. Typical values are at T = +25C.) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ADC Resolution No missing codes 12 Bits DSP-Mode Resolution 256 oversampling, dither enabled 16 Bits Integral Nonlinearity INL Normal mode (Note 1) 1 LSB 12 Differential Nonlinearity DNL Normal mode (Note 1) 1 LSB 12 Offset Error (Note 1) 4 mV Offset Drift 1.5 V/C Gain = 1 0.1 Gain Error (Excluding Reference) Gain = 2, 4 1.5 % FS (Note 1) Gain = 8 2.5 Gain Temperature Coefficient Excluding reference 0.8 ppm/C + V / R E F AD C Unipolar mode, gain = 1, 2, 4, 8 0 Gain Voltage Range V -V / + V / REFADC R E F AD C Bipolar mode, gain = 1, 2, 4, 8 (2 x Gain) (2 x Gain) Absolute Input Voltage Range AGND AV V DD Input Leakage Current into (Note 2) 0.5 1 nA Analog Inputs Gain = 1, 2 24 Input Capacitance pF Gain = 4, 8 48 Gain = 1, 2 0.6 Acquisition Time t s ACQ Gain = 4, 8 1.2 Conversion Time t 12 clocks 2.4 s CONV Conversion Clock Frequency 0.1 5.0 MHz Normal operation mode, 325 ADC converting at 234ksps ADC Supply Current (Note 3) A Fast power-down mode, 210 ADC converting at 234ksps Aperture Delay t 30 ns AD 2 MAX1329/MAX1330