HI-7153

Features:

• 5µs Conversion Time
• 8 Channel Input Multiplexer
• 200,000 Channels/Second Throughput Rate
• Over 9 Effective Bits at 20kHz
• No Offset or Gain Adjustments Necessary
• Analog and Reference Inputs Fully Buffered
• On-Chip Track and Hold Amplifier
• µP Compatible Interface
• 2's Complement Data Output
• 150mW Power Consumption
• Only a Single 2.5V Reference Required for a ±2.5V
Input Range
• Out-of-Range Flag
• /883 Version Available


Application

• µP Controlled Data Acquisition Systems
• DSP
- Avionics
- Sonar
• Process Control
- Automotive Transducer Sensing
- Industrial
• Robotics
• Digital Communications


Pinout




Specifications

Supply Voltage
V+ to GND (DG/AG/GND) . . . . . . . . . . . . . -0.3V < V+ < +5.7V
V- to GND (DG/AG/GND) . . . . . . . . . . . . . . -5.7V < V- < +0.3V
Analog InputPins (Note 1)
(AIN0 - AIN7, VREF) . . . . . . . . . . V- -0.3V < VINA < V+ +0.3V
Digital I/O Pins (Note 1) . . . . . . . DG -0.3V <VI/O < V+ +0.3V
(D0 - D9, OVR, CLK, CS, RD, WR, ALE, SMODE, HOLD, EOC,
HBE, BUS, A0 - A2, TEST)
Storage Temperature Range . . . . . . . . . . . -65oC to +150oC
Lead Temperature (Soldering 10s). . . . . . . . . . . . . . .+300oC


Description

The HI-7153 is an 8 channel high speed 10 bit A/D converter which uses a Two Step Flash algorithm to achieve through-put rates of 200kHz. The converter features an 8 channel CMOS analog multiplexer with random channel addressing. A unique switched capacitor technique allows a new input voltage to be sampled while a conversion is taking place.

Internal high speed CMOS buffers at both the analog and reference inputs simplifies interface requirements. A Track and Hold amplifier is included on the HI-7153 chip, consisting of two high speed amplifiers and an internal hold capacitor, reducing external circuitry.

Microprocessor bus interfacing is simplified by the use of standard Chip Select, Read, and Write control signals. The digital three-state outputs are byte organized for bus interface to 8 or 16 bit systems. An Out-of-Range pin, together with the MSB bit, can be used to indicate an under or over-range condition.The HI-7153 operates with ±5V supplies. Only a single +2.5V reference is required to provide a bipolar input range from -2.5V to +2.5V.