HI3304

Features:

• CMOS Low Power (Typ). . . . . . . . . . . . . . . . . . . . 35mW
• Parallel Conversion Technique
• Single Power Supply Voltage . . . . . . . . . . . . 3V to 7.5V
• Sampling Rate at 5V Supply . . . . . . . . . . . . . . . . . 25MHz
• 4-Bit Latched Three-State Output with Overflow and Data Change Outputs
• Maximum Nonlinearity. . . . . . . . . . . . . . . . . . . . 1/8 LSB
• Inherent Resistance to Latch-Up
• Bipolar Input Range with Optional Second Supply
• Input Bandwidth (Typ) . . . . . . . . . . . . . . . . . . . . . 40MHz
• Linearity (INL, DNL):
     - HI3304JIP . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.25 LSB
     - HI3304JIB . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.25 LSB
• Sampling Rate:
     - HI3304JIP . . . . . . . . . . . . . . . . . . . . . . . 25MHz (40ns)
     - HI3304JIB . . . . . . . . . . . . . . . . . . . . . . . 25MHz (40ns)


Application

• Video Digitizing
• High Speed Data Acquisition
• Digital Communication Systems
• Radar Signal Processing


Pinout




Specifications

DC Supply Voltage Range (V_DD or V_AA+)
(Voltage Referenced to VSS or VAA- Terminal,
Whichever is More Negative) . . . . . . . . . . . . . . . . . . -0.5V to +8V
Input Voltage Range
CE1, CE2 Inputs . . . . . . . . . . . . . . . . . . . V_SS -0.5V to V_DD +0.5V
Clock, VREF+, VREF-, VIN Inputs . . . . . . . V_AA -0.5V to V_AA +0.5V
DC Input Current, Any Input . . . . . .  . . . . . . . . . . . . . . . . ±20mA


Description

The Intersil HI3304 is a CMOS parallel (FLASH) analog-todigital converter designed for applications demanding both low-power consumption and high speed digitization. Digitizing at 25MHz, for example, requires only about 35mW.

The HI3304 operates over a wide, full-scale signal input voltage range of 0.5V up to the supply voltage. Power consumption is as low as 10mW, depending upon the clock frequency selected.

Sixteen paralleled auto-balanced voltage comparators measure the input voltage with respect to a known reference to produce the parallel-bit outputs in the HI3304. Fifteen comparators are required to quantize all input voltage levels in this 4-bit converter, and the additional comparator is required for the overflow bit. A data change pin indicates when the present output differs from the previous, thus allowing compactionof data storage.