The MAX1110/MAX1111 are low-power, 8-bit, 8-channel
analog-to-digital converters (ADCs) that feature an internal track/hold, voltage reference, clock, and serial interface. They operate from a single +2.7V to +5.5V supply and consume only 85µA while sampling at rates up to 50ksps. The MAX1110's 8 analog inputs and the MAX1111's 4 analog inputs are software-configurable, allowing unipolar/bipolar and single-ended/differential operation.
Successive-approximation conversions are performed using
either the internal clock or an external serial-interface clock. The full-scale analog input range is determined by the 2.048V internal reference, or by an externally applied reference ranging from 1V to VDD. The 4-wire serial interface is compatible with the SPI™, QSPI™, and MICROWIRE™ serial-interface standards. A serial-strobe output provides the end-of-conversion signal for interrupt-driven processors.
The MAX1110/MAX1111 have a software-programmable, 2µA automatic power-down mode to minimize power consumption. Using power-down, the supply current is reduced to 6µA at 1ksps, and only 52µA at 10ksps. Power-down can also be controlled using the SHDN-bar input pin. Accessing the serial interface automatically powers up the device.
The MAX1110 is available in 20-pin SSOP and DIP packages. The MAX1111 is available in small 16-pin QSOP and DIP packages.
Key Features
Applications/Uses
+2.7V to +5.5V Single Supply
Low Power:
85µA at 50ksps
6µA at 1ksps
8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1110)
4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1111)
Internal Track/Hold; 50kHz Sampling Rate
Internal 2.048V Reference
SPI/QSPI/MICROWIRE-Compatible Serial Interface
Software-Configurable Unipolar or Bipolar Inputs
Total Unadjusted Error:
±1LSB max
±0.3LSB typ
4mA- to 20mA-Powered Remote Data-Acquisition Systems
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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