7846A D/A Converter, 16-bit				7846A Information - Product Datasheet - Product Flow - Back to Data Conversion

Features

• RAD-PAK® technology-hardened against natural space radiation
• Total dose hardness:
  • > 100 krad (Si), depending upon space mission
• Excellent Single Event Effects
  • SELTH > 114 MeV/mg/cm²
  • SEU < 8 MeV/mg/cm²
• Package:
  • 28 pin RAD-PAK Flat Pack
• Microprocessor compatible with readback capability
• 16-Bit monotonicity over temperature
• ±2 LSBs integral linearity error
• Unipolar or bipolar output
• Multiplying capability
• Low power (100 mW typical)
  

Description

Maxwell Technologies’ 7846A 16-Bit DAC converter microcircuit features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. The 7846A has VREF+ and VREF- reference inputs and an on-chip output amplifier which gives the option of unipolar or bipolar output. The 7846A uses a segmented architecture. The 4 MSBs in the DAC latch select one of the segments in a 16-resistor string. Both taps of the segment are buffered by amplifiers and fed to a 12-bit DAC, which provides a further 12 bits of resolution. This architecture ensures 16-bit monotonicity.

Excellent integral linearity results from tight matching between the input offset voltages of the two buffer amplifiers. In addition to the excellent accuracy specifications, the 7846A also offers a comprehensive microprocessor interface. There are 16 data I/O pins, plus control lines (CS, R/W, LDAC and CLR). R/W and CS have readback function which allows writing to and reading from the I/O latch.

Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. In a GEO orbit, RAD-PAK provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S.