Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs

 

Part Number	Replacement	Explanation

Description

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The MAX1117/MAX1118/MAX1119 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference (MAX1117/MAX1119), clock, and serial interface. The MAX1118 is specified from +2.7V to +5.5V and consumes only 135µA at 100ksps. The MAX1117 is specified from +2.7V to +3.6V, and the MAX1119 is specified from +4.5V to +5.5V, each consumes only 175µA at 100ksps.

The full-scale analog input range is determined by the internal reference of +2.048V (MAX1117) or +4.096V (MAX1119), or by an externally applied reference ranging from +1V to V_DD (MAX1118). All devices feature an automatic shutdown mode that reduces supply current to < 1µA when the device is not in use. The 3-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 100ksps are performed using an internal clock.

The MAX1117/MAX1118/MAX1119 are available in an 8-pin SOT23 package with a footprint that is only 11% of an 8-pin plastic DIP.

MAX1117, MAX1118, MAX1119: Typical Operating Circuit Enlarge+

Key Features

• Single Supply
  • +2.7V to +3.6V (MAX1117)
  • +2.7V to +5.5V (MAX1118)
  • +4.5V to +5.5V (MAX1119)
• Internal Track/Hold: 100kHz Sampling Rate
• Internal Reference
  • +2.048V (MAX1117)
  • +4.096V (MAX1119)
• Reference Input Range: 0 to V_DD (MAX1118)
• SPI/QSPI/MICROWIRE-Compatible Serial Interface
• Small 8-Pin SOT23 Package
• Automatic Power-Down
• Analog Input Range: 0 to V_REF
• Low Power
  • 175µA at 100ksps (typ) (MAX1117/MAX1119)
  • 135µA at 100ksps (typ) (MAX1118)
  • 18µA at 10ksps (typ)
  • 1µA (typ) in Power-Down Mode

Applications/Uses

• 4mA to 20mA Powered Remote Data Acquisition Systems
• Battery-Powered Test Equipment
• Low-Power, Handheld Portable Devices
• Receive Signal Strength Indicators
• Solar-Powered Remote Systems
• System Diagnostics