MAX1115/MAX1116 19-1822 Rev 1 2/02 Single-Supply, Low-Power, Serial 8-Bit ADCs General Description Features The MAX1115/MAX1116 low-power, 8-bit, analog-to- Single Supply digital converters (ADCs) feature an internal track/hold +2.7V to +3.6V (MAX1115) (T/H), voltage reference, V monitor, clock, and serial DD +4.5V to +5.5V (MAX1116) interface. The MAX1115 is specified from +2.7V to Input Voltage Range: 0 to V +5.5V, and the MAX1116 is specified from +4.5V to REF +5.5V. Both parts consume only 175A at 100ksps. Internal Track/Hold 100kHz Sampling Rate The full-scale analog input range is determined by the Internal Reference internal reference of +2.048V (MAX1115) or +4.096V +2.048V (MAX1115) (MAX1116). The MAX1115/MAX1116 also feature +4.096V (MAX1116) AutoShutdown power-down mode which reduces power consumption to <1A when the device is not in SPI/QSPI/MICROWIRE-Compatible Serial Interface use. The 3-wire serial interface directly connects to Small 8-Pin SOT23 Package SPI, QSPI, and MICROWIRE devices without external logic. Conversions up to 100ksps are per- Automatic Power-Down formed using an internal clock. Low Power The MAX1115/MAX1116 are available in an 8-pin 175A at 100ksps SOT23 package with a footprint that is just 30% of an 18A at +3V and 10ksps 8-pin SO. 1A in Power-Down Mode Ordering Information Applications Low-Power, Hand-Held Portable Devices PIN- TOP PART TEMP RANGE PACK A G E M A RK System Diagnostics MAX1115EKA -40C to +85C 8 SOT23 AADU Battery-Powered Test Equipment MAX1116EKA -40C to +85C 8 SOT23 AADV Receive-Signal-Strength Indicators 4mA to 20mA Powered Remote Data-Acquisition Systems Pin Configuration TOP VIEW V 1 8 SCLK DD CH0 2 7 DOUT AutoShutdown is a trademark of Maxim Integrated Products. MAX1115 CONVST I.C. 3 6 MAX1116 SPI/QSPI are trademarks of Motorola, Inc. I.C. GND 4 5 MICROWIRE is a trademark of National Semiconductor, Corp. SOT23 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.Single-Supply, Low-Power, Serial 8-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +6.0V Operating Temperature Range DD CH0 to GND ...............................................-0.3V to (V + 0.3V) MAX111 EKA ..................................................-40C to + 85C DD Digital Output to GND ................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C DD Digital Input to GND ..............................................-0.3V to +6.0V Storage Temperature Range .............................-60C to +150C Maximum Current into Any Pin .........................................50mA Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) A 8-Pin SOT23 (derate 8.9mW/C above +70C)............714mW 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 (MAX1115), V = +4.5V to +5.5V (MAX1116), T = T to T , unless otherwise noted.) DD DD A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 8 Bits Relative Accuracy INL (Note 1) 1 LSB Differential Nonlinearity DNL 1 LSB Offset Error 0.5 LSB Gain Error 5 %FSR Gain Temperature Coefficient 90 ppm/C V /2 Sampling Error 2 7% DD DYNAMIC PERFORMANCE (25kHz sine-wave input, V = V ( ), f = 5MHz, f = 100ksps, R = 100 ) IN REF P-P SCLK SAMPLE IN Signal-to-Noise Plus Distortion SINAD 48 dB Total Harmonic Distortion THD -69 dB (up to the 5th Harmonic) Spurious-Free Dynamic Range SFDR 66 dB Small-Signal Bandwidth f 4 MHz -3dB ANALOG INPUT Input Voltage Range 0 V V REF Input Leakage Current V = 0 or V 0.7 10 A CH DD Input Capacitance C 18 pF IN INTERNAL REFERENCE MAX1115 2.048 Voltage V V REF MAX1116 4.096 POWER REQUIREMENTS MAX1115 2.7 5.5 Supply Voltage V V DD MAX1116 4.5 5.5 f = 10ksps 14 21 SAMPLE MAX1115 f = 100ksps 135 190 SAMPLE Supply Current (Note 2) I f = 10ksps 19 25 A DD SAMPLE MAX1116 f = 100ksps 182 230 SAMPLE Shutdown 0.8 10 2 MAX1115/MAX1116