ADC78H89CIMT Datasheet, PDF (1/16 Pages) National Semiconductor (TI) – 7-Channel, 500 KSPS, 12-Bit A/D Converter

March 2005
ADC78H89
7-Channel, 500 KSPS, 12-Bit A/D Converter
General Description
The ADC78H89 is a low-power, seven-channel CMOS 12-bit
analog-to-digital converter with a conversion throughput of
500 KSPS. The converter is based on a successive-
approximation register architecture with an internal track-
and-hold circuit. It can be configured to accept up to seven
input signals on pins AIN1 through AIN7.
The output serial data is straight binary, and is compatible
with several standards, such as SPI™, QSPI™, MICROW-
IRE™, and many common DSP serial interfaces.
The ADC78H89 may be operated with independent analog
and digital supplies. The analog supply (AV_DD) can range
from +2.7V to +5.25V, and the digital supply (DV_DD) can
range from +2.7V to AV_DD. Normal power consumption using
a +3V or +5V supply is 1.5 mW and 8.3 mW, respectively.
The power-down feature reduces the power consumption to
just 0.3 µW using a +3V supply, or 0.5 µW using a +5V
supply. The ADC78H89 is packaged in a 16-lead TSSOP
package. Operation over the industrial temperature range of
−40˚C to +85˚C is guaranteed.
Features
n Seven input channels
n Variable power management
n Independent analog and digital supplies
n SPI™/QSPI™/MICROWIRE™/DSP compatible
n Packaged in 16-lead TSSOP
Key Specifications
n Conversion Rate
n DNL
n INL
n Power Consumption
— 3V Supply
— 5V Supply
500 KSPS
± 1 LSB (max)
± 1 LSB (max)
1.5 mW (typ)
8.3 mW (typ)
Applications
n Automotive Navigation
n Portable Systems
n Medical Instruments
n Mobile Communications
n Instrumentation and Control Systems
Connection Diagram
Ordering Information
Order Code
ADC78H89CIMT
ADC78H89CIMTX
ADC78H89EVAL
Temperature Range
−40˚C to +85˚C
−40˚C to +85˚C
20061605
Description
16-Lead TSSOP Package
16-Lead TSSOP Package, Tape & Reel
Evaluation Board
TRI-STATE^® is a trademark of National Semiconductor Corporation.
MICROWIRE™ is a trademark of National Semiconductor Corporation.
QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2005 National Semiconductor Corporation DS200616
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