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MAX1108 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1108 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 20 page General Description The MAX1108/MAX1109 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference, clock, and serial inter- face. The MAX1108 is specified from +2.7V to +3.6V and consumes only 105µA. The MAX1109 is specified from +4.5V to +5.5V and consumes only 130µA. The analog inputs are software configurable, allowing unipolar/bipolar and single-ended/differential operation; battery monitor- ing capability is also included. The full-scale analog input range is determined by the internal reference of +2.048V (MAX1108) or +4.096V (MAX1109), or by an externally applied reference rang- ing from 1V to VDD. The MAX1108/MAX1109 also feature a software power-down mode that reduces power con- sumption to 0.5µA when the device is not in use. The 4-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 50ksps are performed using either the internal clock or an external serial-interface clock. The MAX1108 and MAX1109 are available in a 10-pin µMAX package with a footprint that is just 20% of an 8-pin plastic DIP. Applications Portable Data Logging Hand-Held Measurement Devices Medical Instruments System Diagnostics Solar-Powered Remote Systems 4–20mA-Powered Remote Systems Receive-Signal Strength Indicators Features o Single Supply: +2.7V to +3.6V (MAX1108) +4.5V to +5.5V (MAX1109) o Low Power: 105µA at +3V and 50ksps 0.5µA in Power-Down Mode o Software-Configurable Unipolar or Bipolar Inputs o Input Voltage Range: 0 to VDD o Internal Track/Hold o Internal Reference: +2.048V (MAX1108) +4.096V (MAX1109) o Reference Input Range: 1V to VDD o SPI/QSPI/MICROWIRE-Compatible Serial Interface o VDD Monitoring Mode o Small 10-Pin µMAX Package Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs ________________________________________________________________ Maxim Integrated Products 1 1 2 3 4 5 10 9 8 7 6 SCLK DOUT DIN CS GND CH1 CH0 VDD MAX1108 MAX1109 µMAX TOP VIEW COM REF INPUT SHIFT REGISTER CONTROL LOGIC T/H SAR INTERNAL OSCILLATOR OUTPUT SHIFT REGISTER VDD ANALOG INPUT MUX INTERNAL REFERENCE DOUT SCLK DIN CH0 COM REF CH1 CS GND CHARGE REDISTRIBUTION DAC MAX1108 MAX1109 Functional Diagram 19-1399; Rev 1; 6/03 Pin Configuration Ordering Information PART MAX1108CUB MAX1108EUB -40°C to +85°C 0°C to +70°C TEMP RANGE PIN-PACKAGE 10 µMAX 10 µMAX MAX1109CUB MAX1109EUB -40°C to +85°C 0°C to +70°C 10 µMAX 10 µMAX SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. |
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