Single-Supply / Low-Power / 2-Channel / Serial 8-Bit ADCs - Maxim
Description
19-1399; Rev 0; 10/98
Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs
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 interface.
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 monitoring 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 ranging from 1V to VDD.
The MAX1108/MAX1109 also feature a software power-down mode that reduces power consumption 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.
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
MAX1108/MAX1109
Ordering Information
PART MAX1108CUB MAX1108EUB MAX1109CUB MAX1109EUB TEMP.
RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PIN-PACKAGE 10 µMAX 10 µMAX 10 µMAX 10 µMAX
Applications
Portable Data Logging Hand-Held Measurement Devices Medical Instruments System Diagnostics Solar-Powered Remote Systems 4–20mA-P...
Similar Datasheet
