MAX1253/MAX1254 19-2838 Rev 0 4/03 Stand-Alone, 10-Channel, 12-Bit System Monitors with Internal Temperature Sensor and V Monitor DD General Description Features Monitor 10 Signals Without Processor The MAX1253/MAX1254 are stand-alone, 10-channel (8 Intervention external, 2 internal) 12-bit system monitor ADCs with internal reference. A programmable single-ended/dif- Eight External Channels Programmable as Temperature or Voltage Monitors ferential mux accepts voltage and remote-diode tem- perature-sensor inputs. These devices independently Intelligent Circuitry for Reliable Autonomous monitor the input channels without microprocessor Measurement Programmable Digital Averaging Filter interaction and generate an interrupt when any variable Programmable Fault Counter exceeds user-defined limits. The MAX1253/MAX1254 configure both high and low limits, as well as the num- Precision Measurements 12-Bit Resolution ber of fault cycles allowed, before generating an inter- 1 LSB INL, 1 LSB DNL rupt. These ADCs can also perform recursive data 0.75C Temperature Accuracy (typ) averaging for noise reduction. Programmable wait inter- Flexible vals between conversion sequences allow the selection Automatic Channel Scan Sequencer with of the sample rate. Programmable Intervals At the maximum sampling rate of 94ksps (auto mode, Programmable Inputs: Single Ended/Differential, single channel enabled), the MAX1253 consumes only Voltage/Temperature TM 5mW (1.7mA at 3V). AutoShutdown reduces supply Programmable Wait State current to 190A at 2ksps and to less than 8A at 50sps. Internal 2.5V/4.096V Reference (MAX1253/MAX1254) Stand-alone operation, combined with ease of use in a small package (16-pin TSSOP), makes the MAX1253/ Remote Temperature Sensing Up to 10m (Differential Mode) MAX1254 ideal for multichannel system-monitoring applications. Low power consumption also makes Single 3V or 5V Supply Operation these devices a good fit for hand-held and battery-pow- Small 16-Pin TSSOP Package ered applications. Applications Ordering Information System Supervision PART TEMP RANGE PIN-PACKAGE Remote Telecom Networks 16 TSSOP MAX1253AEUE* -40C to +85C Server Farms 16 TSSOP MAX1253BEUE -40C to +85C 16 TSSOP Remote Data Loggers MAX1254AEUE* -40C to +85C 16 TSSOP MAX1254BEUE -40C to +85C *Future productcontact factory for availability. Selector Guide Pin Configuration TEMP SUPPLY TOP VIEW PART INL (LSB) ERROR (C) VOLTAGE (V) AIN0 1 16 CS MAX1253AEUE* 1 1.0 2.7 to 3.6 AIN1 2 15 SCLK 1 3.0 MAX1253BEUE 2.7 to 3.6 AIN2 3 14 DIN 1 1.0 MAX1254AEUE* 4.5 to 5.5 AIN3 4 MAX1253 13 V DD 1 2.5 MAX1254BEUE 4.5 to 5.5 MAX1254 AIN4 5 12 GND *Future productcontact factory for availability. AIN5 6 11 DOUT AIN6 10 INT 7 AIN7 8 9 REF Typical Application Circuit appears at end of data sheet. 16 TSSOP AutoShutdown is a trademark of Maxim Integrated Products, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Stand-Alone, 10-Channel, 12-Bit System Monitors with Internal Temperature Sensor and V Monitor DD ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DD A Analog Inputs to GND (AIN0AIN7, REF) ... -0.3V to (V + 0.3V) 16-Pin TSSOP (derate 8.7mW/C above +70C) .........696mW DD Digital Inputs to GND (DIN, SCLK, CS) .... -0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C DD Digital Outputs to GND (DOUT, INT) ........ -0.3V to (V + 0.3V) Junction Temperature......................................................+150C DD Digital Outputs Sink Current ............................................. 25mA Storage Temperature Range .............................-65C to +150C Maximum Current into Any Pin .......................................... 50mA 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 (V = +2.7V to +3.6V (MAX1253), V = +4.5V to +5.5V (MAX1254), V = +2.5V (MAX1253), V = +4.096V (MAX1254), f DD DD REF REF SCLK = 10MHz (50% duty cycle), 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 Resolution RES 12 Bits Grade A 1.0 Integral Nonlinearity (Note 1) INL LSB Grade B 1.0 Differential Nonlinearity DNL No missing codes overtemperature 1.0 LSB Offset Error 4.0 LSB External reference 4.0 LSB Gain Error (Note 2) Internal reference 2.0 %FSR Offset Error Tempco 5pp m /C External reference 2 Gain and Temperature Coefficient p p m /C Internal reference 30 C hannel- to-C hannel O ffset Matchi ng 0.1 LSB V M onitor A ccurac y Internal reference 2.5 % DD DYNAMIC ACCURACY (10kHz sine-wave input, 2.5V (MAX1253), 4.096V (MAX1254), 64ksps, f = 10MHz, bipolar input mode) P-P P-P SCLK Signal-to-Noise Plus Distortion SINAD 70 dB Total Harmonic Distortion THD Up to the 5th harmonic -76 dB Spurious-Free Dynamic Range SFDR 72 dB Full-Power Bandwidth -3dB point 1 MHz Full Linear Bandwidth S / (N + D) > 68dB 100 kHz CONVERSION RATE Voltage measurement, all ref modes 10.6 11.7 Conversion Time (Note 3) t Temp-sensor ref modes 01, 10 46 50.7 s CONV Temp-sensor ref mode 00 73 80 Single-Channel Throughput Manual trigger, voltage measurement 70 ksps Power-Up Time t Internal reference (Note 4) 40 45 s PU ANALOG INPUT (AIN0AIN7) U ni p olar , s ing l e-end ed , or d i fferenti al i nput s 0 +V REF Input Voltage Range (Note 5) V Bipolar, differential inputs -V / 2 +V / 2 REF REF Common-Mode Range Differentially configured inputs 0 V V DD Common-Mode Rejection D i fferenti al ly config ured i nputs , V = 0 to V -90 dB C M D D 2 MAX1253/MAX1254