MAX148
Info: : PRODUCTION
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MAX148

+2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $4.96
Features
  • 8-Channel Single-Ended or 4-Channel Differential Inputs
  • Single-Supply Operation: +2.7V to +5.25V
  • Internal 2.5V Reference (MAX149)
  • Low Power:
    • 1.2mA (133ksps, 3V Supply)
    • 54µA (1ksps, 3V Supply)
    • 1µA (Power-Down Mode)
  • SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • 20-Pin PDIP/SSOP Packages
Additional Details
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The MAX148/MAX149 10-bit data-acquisition systems combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. They operate from a single +2.7V to +5.25V supply, and sample to 133ksps. Both devices’ analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.

The 4-wire serial interface connects directly to SPI/QSPI™ and MICROWIRE™ devices without external logic. A serial-strobe output allows direct connection to TMS320-family digital signal processors. The MAX148/MAX149 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

The MAX149 has an internal 2.5V reference, while the MAX148 requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range.

These devices provide a hard-wired active-low SHDN pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the MAX148/MAX149, and the quick turn-on time allows them to be shut down between all conversions. This technique can cut supply current to under 60µA at reduced sampling rates.

The MAX148/MAX149 are available in 20-pin PDIP and 20-pin SSOP packages.

For 4-channel versions of these devices, see the MAX1248/MAX1249 data sheet.

Applications

  • Battery-Powered Instruments
  • Data Acquisition
  • Medical Instruments
  • Pen Digitizers
  • Portable Data Logging
  • Process Control
Part Models 6
1ku List Price Starting From $4.96

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX148ACAP+
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MAX148BCAP+
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MAX148BCAP+T
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MAX148BEAP+
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MAX148BEAP+T
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MAX148BEPP+
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