MAX1340/MAX1342/MAX1346/MAX1348 19-3332 Rev 3 3/08 12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports General Description Features The MAX1340/MAX1342/MAX1346/MAX1348 integrate a 12-Bit, 225ksps ADC Analog Multiplexer with True-Differential multichannel, 12-bit, analog-to-digital converter (ADC) Track/Hold (T/H) and a quad, 12-bit, digital-to-analog converter (DAC) in a 8 Single-Ended Channels or 4 Differential single IC. The devices also include a temperature sensor Channels (Unipolar or Bipolar) and configurable general-purpose I/O ports (GPIOs) with (MAX1340/MAX1342) a 25MHz SPI-/QSPI-/MICROWIRE-compatible seri- 4 Single-Ended Channels or 2 Differential al interface. The ADC is available in a 4 or an 8 input- Channels (Unipolar or Bipolar) channel version. The four DAC outputs settle within 2.0s, (MAX1346/MAX1348) and the ADC has a 225ksps conversion rate. Excellent Accuracy: 0.5 LSB INL, 0.5 LSB DNL All devices include an internal reference (4.096V) provid- 12-Bit, Quad, 2s Settling DAC ing a well-regulated, low-noise reference for both the Ultra-Low Glitch Energy (4nVs) ADC and DAC. Programmable reference modes for the Power-Up Options from Zero Scale or Full Scale ADC and DAC allow the use of an internal reference, an Excellent Accuracy: 0.5 LSB INL external reference, or a combination of both. Features Internal Reference or External Single-Ended/ such as an internal 1C accurate temperature sensor, Differential Reference FIFO, scan modes, programmable internal or external Internal Reference Voltage (4.096V) clock modes, data averaging, and AutoShutdown allow Internal 1C Accurate Temperature Sensor users to minimize both power consumption and proces- sor requirements. The low glitch energy (4nVs) and low On-Chip FIFO Capable of Storing 16 ADC Conversion Results and One Temperature Result digital feedthrough (0.5nVs) of the integrated quad DACs make these devices ideal for digital control of fast- On-Chip Channel-Scan Mode and Internal response closed-loop systems. Data-Averaging Features The devices are guaranteed to operate with a supply Analog Single-Supply Operation voltage from +4.75V to +5.25V The devices consume +4.75V to +5.25V 2.5mA at 225ksps throughput, only 22A at 1ksps Digital Supply: 2.7V to AV DD throughput, and under 0.2A in the shutdown mode. The 25MHz, SPI/QSPI/MICROWIRE Serial Interface MAX1342/MAX1348 offer four GPIOs that can be config- AutoShutdown Between Conversions ured as inputs or outputs. Low-Power ADC The MAX1340/MAX1342/MAX1346/MAX1348 are avail- 2.5mA at 225ksps able in 36-pin thin QFN packages. All devices are speci- 22A at 1ksps fied over the -40C to +85C temperature range. 0.2A at Shutdown Applications Low-Power DAC: 1.5mA Closed-Loop Controls for Optical Components Evaluation Kit Available (Order MAX1258EVKIT) and Base Stations SPI and QSPI are trademarks of Motorola, Inc. System Supervision and Control MICROWIRE is a trademark of National Semiconductor Corp. Data-Acquisition Systems AutoShutdown is a trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. Ordering Information/Selector Guide REF ANALOG RESOLUTION ADC DAC PART TEMP RANGE PIN-PACKAGE VOLTAGE SUPPLY GPIOs BITS** CHANNELS CHANNELS (V) VOLTAGE (V) MAX1340BETX -40C to +85C 36 Thin QFN-EP* 4.096 4.75 to 5.25 12 8 4 0 MAX1342BETX -40C to +85C 36 Thin QFN-EP* 4.096 4.75 to 5.25 12 8 4 4 MAX1346BETX -40C to +85C 36 Thin QFN-EP* 4.096 4.75 to 5.25 12 4 4 0 MAX1348BETX -40C to +85C 36 Thin QFN-EP* 4.096 4.75 to 5.25 12 4 4 4 *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 AVAILABLE12-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 may 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 = 4.75V to 5.25V, external reference V = 4.096V, f = 3.6MHz (50% duty cycle), T = -40C to +85C, unless DD DD REF CLK A otherwise noted. Typical values are at AV = DV = 5V, T = +25C. Outputs are unloaded, unless otherwise noted.) DD DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ADC DC ACCURACY (Note 1) Resolution 12 Bits Integral Nonlinearity INL 0.5 1.0 LSB Differential Nonlinearity DNL 0.5 1.0 LSB Offset Error 0.5 4.0 LSB Gain Error (Note 2) 0.5 4.0 LSB Gain Temperature Coefficient 0.8 ppm/C Channel-to-Channel Offset 0.1 LSB DYNAMIC SPECIFICATIONS (10kHz sine-wave input, V = 4.096V , 225ksps, f = 3.6MHz) IN P-P CLK Signal-to-Noise Plus Distortion SINAD 70 dB Total Harmonic Distortion THD -76 dBc (Up to the Fifth Harmonic) Spurious-Free Dynamic Range SFDR 72 dBc Intermodulation Distortion IMD f = 9.9kHz, f = 10.2kHz 76 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 C l ock C ycles 2 MAX1340/MAX1342/MAX1346/MAX1348