MAX1067/MAX1068 19-2955 Rev 1 8/07 Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters General Description Features The MAX1067/MAX1068 low-power, multichannel, 14- 14-Bit Resolution, 0.5 LSB INL and bit analog-to-digital converters (ADCs) feature a suc- 1 LSB DNL (max) cessive-approximation ADC, integrated +4.096V reference, a reference buffer, an internal oscillator, +5V Single-Supply Operation automatic power-down, and a high-speed SPI/ Adjustable Logic Level (+2.7V to +5.25V) QSPI/MICROWIRE-compatible interface. The MAX1067/MAX1068 operate with a single +5V analog Input Voltage Range: 0 to V REF supply and feature a separate digital supply, allowing Internal (+4.096V) or External (+3.8V to AV ) DD direct interfacing with +2.7V to +5.5V digital logic. Reference The MAX1067/MAX1068 consume only 3.6mA (AV = DD DV = +5V) at 200ksps when using an external refer- Internal Track/Hold, 4MHz Input Bandwidth DD ence. AutoShutdown reduces the supply current to Internal or External Clock 185A at 10ksps and to less than 10A at reduced sam- pling rates. SPI/QSPI/MICROWIRE-Compatible Serial Interface, MAX1068 Performs DSP-Initiated The MAX1067 includes a 4-channel input multiplexer, and Conversions the MAX1068 accepts up to eight analog inputs. In addition, digital signal processor (DSP)-initiated con- 8-Bit-Wide or 16-Bit-Wide Data-Transfer Mode versions are simplified with the DSP frame-sync input and (MAX1068 Only) output featured in the MAX1068. The MAX1068 includes a 4-Channel (MAX1067) or 8-Channel (MAX1068) data-bit transfer input to select between 8-bit-wide or 16- bit-wide data-transfer modes. Both devices feature a scan Input Mux mode that converts each channel sequentially or one Scan Mode Sequentially Converts Multiple channel continuously. Channels or One Channel Continuously Excellent dynamic performance and low power, com- Low Power bined with ease of use and an integrated reference, 3.6mA at 200ksps make the MAX1067/MAX1068 ideal for control and data- 1.85mA at 100ksps acquisition operations or for other applications with 185A at 10ksps demanding power consumption and space require- 0.6A in Full Power-Down Mode ments. The MAX1067 is available in a 16-pin QSOP package, and the MAX1068 is available in a 24-pin Small Package Size QSOP package. Both devices are guaranteed over the 16-Pin QSOP (MAX1067) commercial (0C to +70C) and extended (-40C to 24-Pin QSOP (MAX1068) +85C) temperature ranges. Use the MAX1168 evalua- tion kit to evaluate the MAX1068. Ordering Information Applications PIN- INL PART TEMP RANGE Motor Control PACKAGE (LSB) Industrial Process Control MAX1067ACEE 0C to +70C 16 QSOP 0.5 Industrial I/O Modules MAX1067BCEE 0C to +70C 16 QSOP 1 MAX1067CCEE 0C to +70C 16 QSOP 2 Data-Acquisition Systems MAX1067AEEE -40C to +85C 16 QSOP 0.5 Thermocouple Measurements MAX1067BEEE -40C to +85C 16 QSOP 1 Accelerometer Measurements MAX1067CEEE -40C to +85C 16 QSOP 2 Ordering Information continued at end of data sheet. Pin Configurations appear at end of data sheet. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. AutoShutdown is a trademark of Maxim Integrated Products, Inc. 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.Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DD A DV to DGND.........................................................-0.3V to +6V 16-Pin QSOP (derate 8.3mW/C above +70C)...........667mW DD DGND to AGND.....................................................-0.3V to +0.3V 24-Pin QSOP (derate 9.5mW/C above +70C)...........762mW AIN , REF, REFCAP to AGND..................-0.3V to (AV + 0.3V) Operating Temperature Ranges DD SCLK, CS, DSEL, DSPR, DIN to DGND ...................-0.3V to +6V MAX106 CE ..................................................0C to +70C DOUT, DSPX, EOC to DGND...................-0.3V to (DV + 0.3V) MAX106 EE ...............................................-40C to +85C DD Maximum Current into Any Pin............................................50mA Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C 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, f = 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V DD DD SCLK REF = +4.096V, T = T to T , unless otherwise noted. Typical values are at T = +25C.) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution 14 Bits MAX106 A 0.5 1 Relative Accuracy (Note 2) INL MAX106 B 1.0 2 LSB MAX106 C 1.5 3 MAX106 A 1 +1.5 MAX106 B No missing codes -1.0 Differential Nonlinearity DNL LSB over temperature +1.5 MAX106 C -1.0 External reference 0.33 Transition Noise RMS noise LSB RMS Internal reference 0.35 Offset Error 0.1 10 mV Gain Error (Note 3) 0.01 0.2 %FSR Offset Drift 1 ppm/C Gain Drift (Note 3) 1.2 ppm/C DYNAMIC SPECIFICATIONS (1kHz sine wave, 4.096V ) (Note 1) P-P Signal-to-Noise Plus Distortion SINAD 81 84 dB Signal-to-Noise Ratio SNR 82 84 dB Total Harmonic Distortion THD -98 -86 dB Spurious-Free Dynamic Range SFDR 86 99 dB Full-Power Bandwidth -3dB point 4 MHz Full-Linear Bandwidth SINAD > 81dB 10 kHz Channel-to-Channel Isolation (Note 4) 85 dB CONVERSION RATE Internal clock, no data transfer, 5.52 7.07 single conversion (Note 5) Conversion Time t s CONV External clock 3.75 2 MAX1067/MAX1068