MAX1298/MAX1299 19-1726 Rev 1 3/12 12-Bit Serial-Output Temperature Sensors with 5-Channel ADC General Description Features The MAX1298/MAX1299 implement local and remote Local and Remote Temperature Sensing temperature sensing with 12-bit resolution, using +5V 12-Bit Resolution for Temperature and Voltage and +3V supply voltages, respectively. Accuracy is Inputs 1C from 0 to +70C, with no calibration needed. The devices feature an algorithmic switched-capacitor ana- 1C Accuracy from -40C to +85C log-to-digital converter (ADC), an on-chip clock, and a Fully Differential Inputs 3-wire serial interface compatible with SPI, QSPI, and Single-Supply Operation MICROWIRE . +4.75V to +5.25V (MAX1298) The MAX1298/MAX1299 also perform fully differential +2.7V to +3.6V (MAX1299) voltage measurements with 12-bit resolution and sepa- rate track-and-hold (T/H) for positive and negative 3-Wire SPI/QSPI/MICROWIRE-Compatible inputs. Both devices accept versatile input modes con- Interface sisting of two 3-channel signal pairs, five 1-channel sig- Internal Precision Voltage Reference nals relative to an AIN5, or V /4 relative to ground. An DD 2.50V (MAX1298) external reference may be used for more accurate volt- 1.20V (MAX1299) age measurements. Space-Saving 16-Pin SSOP Package Typical power consumption is only 1.3mW (MAX1299). A shutdown mode and two standby modes provide multiple strategies for prolonging battery life in portable applications that require limited sampling throughput. Ordering Information The MAX1298/MAX1299 are available in 16-pin SSOP PART TEMP RANGE PIN-PACKAGE packages. MAX1298CEAE+ -40C to +85C 16 SSOP Applications MAX1299CEAE+ -40C to +85C 16 SSOP Temperature/Voltage Supervision of +Denotes a lead(Pb)-free/RoHS-compliant package. Workstations and Communications Equipment Hand-Held Instruments Medical Equipment Pin Configuration Industrial Process Control TOP VIEW + AIN1 1 16 AIN0 SHO 2 15 AIN5 AIN2 3 14 REF AIN3 4 MAX1298 13 GND MAX1299 AIN4 5 12 V DD GND 6 11 SCLK SSTRB 7 10 DIN CS 8 9 DOUT Typical Operating Circuit appears at end of data sheet. SSOP QSPI is a trademark of Motorola, Inc. MICROWIRE is a registered 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.12-Bit Serial-Output Temperature Sensors with 5-Channel ADC ABSOLUTE MAXIMUM RATINGS V to GND.-0.3V to +6V Maximum Current into Any Pin.50mA DD SHO to GND...............................................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) DD A Analog Inputs to GND 16-Pin SSOP (derate 7.1mW/C above +70C) .......571.4mW (AIN0, AIN1, AIN2, AIN3, AIN4, Operating Temperature Range ...........................-40C to +85C AIN5, REF).............................................-0.3V to (V + 0.3V) Junction Temperature....+150C DD Digital Inputs to GND (DIN, SCLK, CS)......-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C DD Digital Outputs to GND (DOUT, SSTRB)....-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) ....+300C DD Digital Output Sink Current ..25mA Soldering Temperature (reflow) ..........+260C 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 = 4.75V to 5.25V (MAX1298), V = +2.7V to 3.6V (MAX1299), external reference, V = +2.5V (MAX1298), V = +1.2V DD DD REF REF (MAX1299), f = 2.5MHz, T = T to T , unless otherwise noted. Typical values are at T = +25C.) SCLK A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution RES 12 Bits Relative Accuracy (Note 2) INL 1 LSB Differential Nonlinearity DNL 1 LSB Offset Error Inputs AIN0AIN5 2 LSB Offset Temperature Coefficient 10 V/C Gain Error Inputs AIN0AIN5, offset nulled 4 LSB V /4 Absolute Error 2 LSB DD Gain Temperature Coefficient 2 ppm/C Channel-to-Channel Offset 0.5 LSB Matching CONVERSION RATE Voltage measurement 1.1 Conversion Time (Note 3) t ms CONV Temperature measurement 2.2 Track/Hold Acquisition Time t 16 s ACQ Aperture Delay t 30 ns APR Internal Clock Frequency f 57.6 62.3 65.5 kHz CLK ANALOG INPUTS (AIN0AIN5) Input Voltage Range (Note 4) Measurement with respect to IN-, Figure 1 -2V +2V V REF REF Common-Mode Range 0V V DD Input Current (Note 5) 0.1 5 A Input Capacitance 16 pF 2 MAX1298/MAX1299