MAX1021/MAX1043 19-4009 Rev 1 3/08 10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports General Description Features 10-Bit, 225ksps ADC The MAX1021/MAX1043 integrate a multichannel, 10-bit, Analog Multiplexer with True-Differential analog-to-digital converter (ADC) and a 10-bit, digital-to- Track/Hold (T/H) analog converter (DAC) in a single IC. The devices also Eight Single-Ended Channels or Four include a temperature sensor and configurable general- Differential purpose I/O ports (GPIOs) with a 25MHz SPI-/QSPI-/ Channels (Unipolar or Bipolar) MICROWIRE-compatible serial interface. The ADC is Excellent Accuracy: 0.5 LSB INL, 0.5 LSB available in an eight input-channel version. The DAC out- DNL, No Missing Codes Over Temperature puts settle within 2.0s, and the ADC has a 225ksps con- 10-Bit, Octal, 2s Settling DAC (MAX1021) version rate. Ultra-Low-Glitch Energy (4nVs) Power-Up Options from Zero Scale or Full Scale All devices include an internal reference (2.5V) to provide Excellent Accuracy: 0.5 LSB INL a well-regulated, low-noise reference for both the ADC Internal Reference or External Single-Ended/ and DAC. Programmable reference modes for the ADC Differential Reference and DAC allow the use of an internal reference, an exter- Internal Reference Voltage (2.5V) nal reference, or a combination of both. Features such as Internal 1C Accurate Temperature Sensor an internal 1C accurate temperature sensor, FIFO, scan modes, programmable internal or external clock On-Chip FIFO Capable of Storing 16 ADC Conversion Results and One Temperature Result modes, data averaging, and AutoShutdown allow users to minimize both power consumption and processor On-Chip Channel-Scan Mode and Internal Data-Averaging Features requirements. The low glitch energy (4nVs) and low digi- tal feedthrough (0.5nVs) of the integrated DACs make Analog Single-Supply Operation these devices ideal for digital control of fast-response +2.7V to +5.25V closed-loop systems. Digital Supply: +2.7V to AV DD The devices are guaranteed to operate with a supply volt- 25MHz, SPI/QSPI/MICROWIRE Serial Interface age from +2.7V to +5.25V. They consume 2.5mA at AutoShutdown Between Conversions 225ksps throughput, only 22A at 1ksps throughput, and Low-Power ADC under 0.2A in the shutdown mode. The MAX1021/ 2.5mA at 225ksps MAX1043 offer four GPIOs that can be configured as 22A at 1ksps inputs or outputs. 0.2A at Shutdown The MAX1021/MAX1043 are available in 36-pin thin QFN Low-Power DAC: 1.5mA packages. These devices are specified over the -40C to Evaluation Kit Available (Order MAX1258EVKIT) +85C temperature range. Applications SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Closed-Loop Controls for Optical Components AutoShutdown is a trademark of Maxim Integrated Products, Inc. and Base Stations System Supervision and Control Pin Configurations appear at end of data sheet. Data-Acquisition Systems Ordering Information/Selector Guide REF ANALOG SUPPLY RESOLUTION ADC DAC PART PIN-PACKAGE GPIOs VOLTAGE (V) VOLTAGE (V) BITS** CHANNELS CHANNELS MAX1021BETX 36 Thin QFN-EP* 2.5 2.7 to 5.25 10 8 8 4 MAX1043BETX 36 Thin QFN-EP* 2.5 2.7 to 5.25 10 8 4 4 Note: All devices are specified over the -40C to +85C operating temperature range. *EP = Exposed pad. **Number of resolution bits refers to both DAC and ADC. 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 AVAILABLE10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +6V Maximum Current into OUT .............................................100mA DD DGND to AGND.....................................................-0.3V to +0.3V Continuous Power Dissipation (T = +70C) A DV to AV .......................................................-3.0V to +0.3V 36-Pin Thin QFN (6mm x 6mm) DD DD Digital Inputs to DGND.............................................-0.3V to +6V (derate 26.3mW/C above +70C)..........................2105.3mW Digital Outputs to DGND .........................-0.3V to (DV + 0.3V) Operating Temperature Range ...........................-40C to +85C DD Analog Inputs, Analog Outputs and REF Storage Temperature Range .............................-60C to +150C to AGND...............................................-0.3V to (AV + 0.3V) Junction Temperature......................................................+150C DD Maximum Current into Any Pin (except AGND, DGND, AV , Lead Temperature (soldering, 10s) .................................+300C DD DV , and OUT ) ...........................................................50mA DD Note: If the package power dissipation is not exceeded, one output at a time can be shorted to AV , DV , AGND, or DGND DD DD indefinitely. 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 = 2.7V to 5.25V, external reference V = 2.5V, f = 3.6MHz (50% duty cycle), T = -40C to +85C, unless DD DD REF CLK A otherwise noted. Typical values are at AV = DV = 3V, T = +25C. Outputs are unloaded, unless otherwise noted.) DD DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ADC DC ACCURACY (Note 1) Resolution 10 Bits Integral Nonlinearity INL 0.5 1.0 LSB Differential Nonlinearity DNL 0.5 1 LSB Offset Error 0.25 2.0 LSB Gain Error (Note 2) 0.025 2.0 LSB Gain Temperature Coefficient 1.4 ppm/C Channel-to-Channel Offset 0.1 LSB DYNAMIC SPECIFICATIONS (10kHz sine-wave input, V = 2.5V , 225ksps, f = 3.6MHz) IN P-P CLK Signal-to-Noise Plus Distortion SINAD 61 dB Total Harmonic Distortion THD -70 dBc (Up to the Fifth Harmonic) Spurious-Free Dynamic Range SFDR 66 dBc Intermodulation Distortion IMD f = 9.9kHz, f = 10.2kHz 72 dBc IN1 IN2 Full-Linear Bandwidth SINAD > 70dB 100 kHz Full-Power Bandwidth -3dB point 1 MHz CONVERSION RATE (Note 3) External reference 0.8 s C onversi on Power-Up Time t PU Internal reference (Note 4) 218 cloc k cycles 2 MAX1021/MAX1043