HI2325

Features:

• Sampling Rate . . . . . . . . . . . . . . . . . . . . . . . . . . .40MSPS
• 6.5 Bits at fIN = 1MHz
• Low Power at 40MSPS. . . . . . . . . . . . . . . . . . . . . 100mW
• Power Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 8mW
• Wide Full Power Input Bandwidth. . . . . . . . . . . . . 250MHz
• Excellent Channel-to-Channel Isolation . . . . . . . . . >75dB
• Internal Digital Clamp
• Internal Voltage Reference
• Single Supply Voltage Operation . . . . . . . . . . . . . . . +3.3V
• TTL/CMOS Compatible Digital Inputs
• CMOS Compatible Digital Outputs . . . . . . . . . . . . . . . 3.3V
• Offset Binary or 2's Complement Output Format
• Dual 8-Bit A/D Converters on a Monolithic Chip


Application

• Wireless Local Loop
• PSK and QAM I&Q Demodulators
• Medical Imaging and Instrumentation
• Portable Communications
• Power Metering
• Hand-Held Data Collection Instruments


Pinout




Specifications

Supply Voltage, AVCC or DVCC to AGND or DGND . . . . . . . . . . 4V
DGND to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V
Digital I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . DGND to DVCC
Analog I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . AGND to AVCC


Description

The HI2325 is a monolithic, dual 8-bit, 40MSPS analog-todigital converter fabricated in an advanced CMOS process. It is designed for high speed applications where integration, bandwidth and accuracy are essential. The HI2325 features a 2-stage parallel architecture. Only one external clock is necessary to drive both converters and an internal voltage reference is provided allowing the system designer to realize an increased level of system integration resulting in decreased cost and power dissipation.

The HI2325 has excellent dynamic performance while consuming less than 100mW power at 40MSPS. The A/D only requires a single +3.3V power supply and encode clock. Data output latches are provided which present valid data to the output bus with a latency of 2 clock cycles.