MAX1286MAX1289 19-2231 Rev 3 8/10 150ksps, 12-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs General Description Features The MAX1286MAX1289 are low-cost, micropower, seri- Single-Supply Operation al output 12-bit analog-to-digital converters (ADCs) +3V (MAX1287/MAX1289) available in a tiny 8-pin SOT23 and an 8-pin TDFN. The +5V (MAX1286/MAX1288) MAX1286/MAX1288 operate with a single +5V supply. Autoshutdown Between Conversions The MAX1287/MAX1289 operate with a single +3V sup- Low Power ply. The devices feature a successive-approximation 245A at 150ksps ADC, automatic shutdown, fast wakeup (1.4s), and a high-speed 3-wire interface. Power consumption is only 150A at 100ksps 0.5mW (V = +2.7V) at the maximum sampling rate of DD 15A at 10ksps 150ksps. AutoShutdown (0.2A) between conversions 2A at 1ksps results in reduced power consumption at slower 0.2A in Shutdown throughput rates. The MAX1286/MAX1287 provide True-Differential Track/Hold, 150kHz Sampling Rate 2-channel, single-ended operations and accept input signals from 0 to V . The MAX1288/MAX1289 accept Software-Configurable Unipolar/Bipolar REF true-differential inputs ranging from 0 to V . Data is REF Conversion (MAX1288/MAX1289 Only) accessed using an external clock through the 3-wire SPI-/QSPI-/MICROWIRE-Compatible Interface for SPI-/QSPI-/MICROWIRE-compatible serial inter- DSPs and Processors face. Excellent dynamic performance, low power, ease Internal Conversion Clock of use, and small package size make these converters ideal for portable battery-powered data-acquisition 8-Pin SOT23 and 8-Pin TDFN Packages applications, and for other applications that demand low power consumption and minimal space. Ordering Information Applications Low-Power Data Acquisition PART PIN-PACKAGE TOP MARK Portable Temperature Monitors MAX1286EKA-T 8 SOT23 AAFA Flowmeters MAX1286ETA+T 8 TDFN-EP* +AFR Touch Screens MAX1287EKA-T 8 SOT23 AAEW MAX1287ETA+T 8 TDFN-EP* +AFN MAX1288EKA-T 8 SOT23 AAFC Pin Configurations MAX1288ETA+T 8 TDFN-EP* +AFT TOP VIEW MAX1289EKA-T 8 SOT23 AAEY MAX1289ETA+T 8 TDFN-EP* +AFP 8 7 6 5 Note: All devices specified over the -40C to +85C operating V 1 8 SCLK DD range. AIN1 (AIN+) 2 7 DOUT +Denotes a lead(Pb)-free/RoHS-compliant package. MAX1286 MAX1286 -Denotes a package containing lead(Pb). MAX1289 MAX1289 AIN2 (AIN-) 3 6 CNVST EP *EP = Exposed pad. GND 4 5 REF + 1 2 3 4 SOT23 TDFN ( ) ARE FOR THE MAX1288/MAX1289 AutoShutdown is a trademark of Maxim Integrated Products, Inc. SPI and 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. EVALUATION KIT AVAILABLE SCLK V DD DOUT AIN1 (AIN+) AIN2 (AIN-) CNVST GND REF150ksps, 12-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C DD CNVST, SCLK, DOUT to GND....................-0.3V to (V + 0.3V) Storage Temperature Range .............................-60C to +150C DD REF, AIN1 (AIN+), AIN2 (AIN-) to GND......-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD Maximum Current into Any Pin............................................50mA Soldering Temperature (reflow) Continuous Power Dissipation (T = +70C) Lead(Pb)-Free Packages...............................................+260C A 8-Pin SOT23 (derate 9.70mW/C above T = +70C) ...696mW Packages Containing Lead(Pb).....................................+240C A 8-Pin TDFN (derate 18.5mW/C above T = +70C) ...1481mW A 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 (V = +2.7V to +3.6V, V = +2.5V for MAX1287/MAX1289, or VDD = +4.75V to +5.25V, V = +4.096V for MAX1286/MAX1288, DD REF REF 0.1F capacitor at REF, f = 8MHz (50% duty cycle), AIN- = GND for MAX1288/MAX1289. T = T to T unless otherwise SCLK A MIN MAX, noted. Typical values at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution 12 Bits Relative Accuracy (Note 2) INL 1.0 LSB Differential Nonlinearity DNL No missing codes over temperature 1.0 LSB Offset Error 2 4 LSB Gain Error (Note 3) 2 4 LSB Gain Temperature Coefficient 0.4 ppm/C Offset Temp erat ure C o effici ent 0.4 pp m/C Channel-to-Channel Offset Matching 0.1 LSB Channel-to-Channel Gain Matching 0.1 LSB Input Common-Mode Rejection CMR V = 0V to V zero scale input 0.1 mV CM DD DYNAMIC SPECIFICATIONS: (f (sine-wave) = 10kHz, V = 4.096Vp-p for MAX1286/MAX1288 or V = 2.5V IN IN IN p-p for MAX1287/MAX1289, 150ksps, f = 8MHz, (50% duty cycle) AIN- = GND for MAX1288/MAX1289) SCLK Signal to Noise Plus Distortion SINAD 70 dB Total Harmonic Distortion THD -82 dB th (up to the 5 harmonic) Spurious-Free Dynamic Range SFDR 86 dB Full-Power Bandwidth -3dB point 1 MHz Full-Linear Bandwidth SINAD > 68dB 100 kHz CONVERSION RATE Conversion Time t Does not include t 3.7 s CONV ACQ T/H Acquisition Time t 1.4 s ACQ Aperture Delay 30 ns Aperture Jitter <50 ps Maximum Serial Clock Frequency f 8 MHz SCLK Duty Cycle 30 70 % ANALOG INPUT Unipolar 0 V REF Input Voltage Range (Note 4) V Bipolar -V /2 V /2 REF REF 2 MAX1286MAX1289