MAX1273:Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range

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; ±VREF, ±VREF / 2, 0 to VREF, 0 to VREF / 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.

Key Features
  • Four Software-Selectable Input Ranges
    • MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V
    • MAX1273: 0 to VREF, 0 to VREF / 2, ±VREF, ±VREF / 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
MAX1272, MAX1273: Typical Operating Circuit
MAX1272, MAX1273: Typical Operating Circuit
Applications/Uses
  • Automatic Testing
  • Battery-Powered Instruments
  • Data Acquisition Systems
  • Industrial Control Systems
  • Medical Instruments
  • Robotics
DataSheet
titleDownload file
MAX1272-MAX1273 Data SheetMAX1272-MAX1273.pdf
Parametrics
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX127212187SARSPIS.E. Only4.0962.44.18101070-870.3µMAX/8
PDIP(N)/8
$3.33 @1k
MAX12734.0962.048-µMAX/8
PDIP(N)/8
$11.24 @500
Design kits & evaluation modules
Related Products
  • MAX1241:+2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO
  • MAX189:+5V, Low-Power, 12-Bit Serial ADCs
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1273CPANo Longer AvailablePDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX1273CPA+No Longer AvailableMAX1273CUA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX1273CUA+ActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX1273CUA+TActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX1273EPANo Longer AvailablePDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX1273EPA+No Longer AvailableMAX1273EUA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX1273EUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX1273EUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX1272-MAX1273.pdf MAX1273
MAX1272-MAX1273.pdf MAX1273