Analog Devices MAX1272 Product Info

• Four Software-Selectable Input Ranges
  • MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V
  • MAX1273: 0 to V_REF, 0 to V_REF / 2, ±V_REF, ±V_REF / 2
• 12-Bit Resolution, No Missing Codes
• 5V Single-Supply Operation
• SPI/QSPI/MICROWIRE-Compatible 3-Wire Interface
• 87ksps Sampling Rate
• ±12V Fault-Protected Analog Input (MAX1272)
• Internal (4.096V) or External (2.4V to 4.18V) Reference
• Low Power
  • 1.5mA at 87ksps
  • 0.4mA at 10ksps
  • 0.2mA at 1ksps
• Four Power-Down Modes
• 8-Pin PDIP Package

The MAX1272/MAX1273 multirange 12-bit data-acquisition systems (DAS) operate with a single 5V supply. The software-programmable analog input accepts a variety of voltage ranges: ±10V, ±5V, 0 to 10V, 0 to 5V for the MAX1272; ±V_REF, ±V_REF / 2, 0 to V_REF, 0 to V_REF / 2 for the MAX1273. The software-selectable extended analog input range increases the effective dynamic range to 14 bits and provides the flexibility to interface 4-20mA powered sensors directly to a single 5V system. In addition, the MAX1272 provides fault protection to ±12V. Other features include a 5MHz track/hold (T/H) bandwidth, 87ksps throughput rate, and internal (4.096V) or external (2.40V to 4.18V) reference.

The MAX1272/MAX1273 serial interfaces connect directly to SPI/QSPI™/MICROWIRE®-compatible devices without any external logic.

Four software-programmable power-down modes (delayed standby, immediate standby, delayed full power-down, and immediate full power-down) provide low-current shutdown between conversions. In standby mode, the internal reference buffer remains active, thus eliminating startup delay.

The MAX1272/MAX1273 are available in an 8-pin µMAX® package. Both devices are available in the extended (-40°C to +85°C) temperature range.

Applications

• Automatic Testing
• Battery-Powered Instruments
• Data Acquisition Systems
• Industrial Control Systems
• Medical Instruments
• Robotics