HI3318

Features:

• CMOS Low Power (Typ). . . . . . . . . . . . . . . . . . . 150mW
• Parallel Conversion Technique
• Sampling Rate at 5V Supply . . . . . . . . . . . . . . . . 15MHz
• 8-Bit Latched Three-State Output with Overflow Bit
• Accuracy (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . . ±1 LSB
• Single Supply Voltage . . . . . . . . . . . . . . . . . . 4V to 7.5V
• Linearity (INL):
      - HI3318JIP . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.5 LSB
      - HI3318JIB . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.5 LSB
• Sampling Rate:
      - HI3318JIP . . . . . . . . . . . . . . . . . . . . . . . 15MHz (67ns)
      - HI3318JIB . . . . . . . . . . . . . . . . . . . . . . . 15MHz (67ns)
• Video Digitizing
• High-Speed A/D Conversion
• Medical Imaging
• Radar Signal Processing
• Digital Communications Systems


Pinout




Specifications

DC Supply Voltage Range (VDD or VAA+) . . . . . . . . . . -0.5V to +8V
(Referenced to VSS or VAA- Terminal, Whichever is
More Negative)
Input Voltage Range
CE2 and CE1 . . . . . . . . . . . . . . . . . . .. .. . . VAA- -0.5V to VDD + 0.5V
Clock, Phase, VREF -, 1/2 Ref . . . . . .. .. . .VAA- -0.5V to VAA+ + 0.5V
Clock, Phase, VREF -, 1/4 Ref . . . . . . .. .. . .VSS- -0.5V to VDD + 0.5V
VIN, 3/4 REF, VREF+. . . . . . . . . . . . . .. .. . .VAA- -0.5V to VAA- + 7.5V
Output Voltage Range, . . . . . . . . . . . .. . . . VSS - 0.5V to VDD + 0.5V
Bits 1-8, Overflow (Outputs Off)
DC Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .±20mA
Clock, Phase, CE1, CE2, VIN, Bits 1-8, Overflow
Recommended VAA+ Operating Range. . . . . . . . . . . . .. . . .VDD ±1V
Recommended VAA- Operating Range . . . . . . . . . . . .. . . . . VSS ±1V


Description

The HI3318 is a CMOS parallel (FLASH) analog-to-digital converter designed for applications demanding both low power consumption and high speed digitization.

The HI3318 operates over a wide full scale input voltage range of 4V up to 7.5V with maximum power consumption depending upon the clock frequency selected. When operated from a 5V supply at a clock frequency of 15MHz, the typical power consumption of the HI3318 is 150mW.

256 paralleled auto balanced voltage comparators measure the input voltage with respect to a known reference to produce the parallel bit outputs in the HI3318. 255 comparators are required to quantize all input voltage levels in this 8-bit converter, and the additional comparator is required for the overflow bit.