MAX1231BCEG+

19-2851; Rev 7; 4/12 KIT ATION EVALU E L B A IL AVA 12-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference Features o Internal Temperature Sensor (±0.7°C Accuracy) o 16-Entry First-In/First-Out (FIFO) o Analog Multiplexer with True Differential Track/Hold 16-, 12-, 8-Channel Single Ended 8-, 6-, 4-Channel True Differential (Unipolar or Bipolar) o Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing Codes Overtemperature o Scan Mode, Internal Averaging, and Internal Clock o Low-Power Single +3V Operation 1mA at 300ksps o Internal 2.5V Reference or External Differential Reference o 10MHz 3-Wire SPI-/QSPI-/MICROWIRE-Compatible Interface o Space-Saving 28-Pin 5mm x 5mm TQFN Package ________________________Applications Ordering Information System Supervision Data-Acquisition Systems PART TEMP RANGE PIN-PACKAGE Industrial Control Systems MAX1227BCEE+ 0°C to +70°C 16 QSOP Patient Monitoring MAX1227BEEE+ -40°C to +85°C 16 QSOP Data Logging MAX1229BCEP+ 0°C to +70°C 20 QSOP MAX1229BEEP+ -40°C to +85°C 20 QSOP Instrumentation AutoShutdown is a trademark of Maxim Integrated Products, Inc. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Ordering Information continued at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad (TQFN only). Connect to GND. Pin Configurations + TOP VIEW AIN0 1 + AIN0 1 20 EOC AIN1 2 19 DOUT AIN2 3 18 DIN 16 EOC AIN1 2 15 DOUT AIN2 3 14 DIN 17 CS AIN3 4 AIN3 4 MAX1227 AIN4 5 MAX1229 16 SCLK 13 CS AIN4 5 12 SCLK AIN5 6 11 VDD AIN5 6 15 VDD AIN6 7 14 GND AIN7 8 13 REF+ AIN8 9 12 CNVST/AIN11 AIN9 10 11 REF-/AIN10 10 GND REF-/AIN6 7 CNVST/AIN7 8 9 REF+ QSOP Pin Configurations continued at end of data sheet. QSOP ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX1227/MAX1229/MAX1231 General Description The MAX1227/MAX1229/MAX1231 are serial 12-bit analog-to-digital converters (ADCs) with an internal reference and an internal temperature sensor. These devices feature an on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown™. The maximum sampling rate is 300ksps using an external clock. The MAX1231 has 16 input channels, the MAX1229 has 12 input channels, and the MAX1227 has 8 input channels. All input channels are configurable for single-ended or differential inputs in unipolar or bipolar mode. All three devices operate from a +3V supply and contain a 10MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial port. The MAX1231 is available in 28-pin 5mm x 5mm TQFN with exposed pad and 24-pin QSOP packages. The MAX1227/MAX1229 are only available in QSOP packages. All three devices are specified over the extended -40°C to +85°C temperature range. MAX1227/MAX1229/MAX1231 12-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V CS, SCLK, DIN, EOC, DOUT to GND.........-0.3V to (VDD + 0.3V) AIN0–AIN13, REF-/AIN_, CNVST/AIN_, REF+ to GND.........................................-0.3V to (VDD + 0.3V) Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW 20-Pin QSOP (derate 9.1mW/°C above +70°C)...........727mW 24-Pin QSOP (derate 9.5mW/°C above +70°C)...........762mW 28-Pin TQFN 5mm x 5mm (derate 20.8mW/°C above +70°C) ........................1667mW Operating Temperature Ranges MAX12__C__.......................................................0°C to +70°C MAX12__E__ ....................................................-40°C to +85°C Storage Temperature Range .............................-60°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) .......................................+260°C 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 (VDD = +2.7V to +3.6V, fSAMPLE = 300kHz, fSCLK = 4.8MHz (50% duty cycle), VREF = 2.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (NOTE 1) Resolution RES Integral Nonlinearity INL Differential Nonlinearity DNL 12 ±1.0 LSB ±1.0 LSB ±0.5 ±4.0 LSB ±0.5 ±4.0 No missing codes over temperature Offset Error Gain Error Bits (Note 2) Offset Error Temperature Coefficient LSB ±2 ppm/°C FSR Gain Temperature Coefficient ±0.8 ppm/°C Channel-to-Channel Offset Matching ±0.1 LSB DYNAMIC SPECIFICATIONS (30kHz sine wave input, 2.5VP-P, 300ksps, fSCLK = 4.8MHz) Signal-to-Noise Plus Distortion SINAD 71 dB Up to the 5th harmonic -80 dBc 81 dBc fIN1 = 29.9kHz, fIN2 = 30.2kHz 76 dBc Full-Power Bandwidth -3dB point 1 MHz Full-Linear Bandwidth S/(N + D) > 68dB 100 kHz Total Harmonic Distortion THD Spurious-Free Dynamic Range SFDR Intermodulation Distortion 2 IMD _______________________________________________________________________________________ 12-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference (VDD = +2.7V to +3.6V, fSAMPLE = 300kHz, fSCLK = 4.8MHz (50% duty cycle), VREF = 2.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CONVERSION RATE Power-Up Time tPU Acquisition Time tACQ Conversion Time tCONV External Clock Frequency fSCLK External reference 0.8 Internal reference (Note 3) 65 Internally clocked 3.5 µs 0.6 Externally clocked (Note 4) 2.7 Externally clocked conversion 0.1 µs 4.8 Data I/O SCLK Duty Cycle µs 10 40 60 MHz % Aperture Delay 30 ns Aperture Jitter