1FEATURES

2? Eight input channels

? Variable power management

? Independent analog and digital supplies

? SPI?/QSPI?/MICROWIRE?/DSP compatible

? Packaged in 16-lead TSSOP

APPLICATIONS

? Automotive Navigation

? Portable Systems

? Medical Instruments

? Mobile Communications

? Instrumentation and Control Systems

KEY SPECIFICATIONS

? Conversion Rate: 500kSPS

? DNL: ± 1LSB (max)

? INL: ± 1LSB (max)

? Power Consumption

– 3V Supply: 1.5 mW (typ)

– 5V Supply: 8.3 mW (typ)

DESCRIPTION

The ADC78H90 is a low-power, eight-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 eight input signals at inputs AIN1

through AIN8.

The output serial data is straight binary, and is

compatible with several standards, such as SPI?,

QSPI?, MICROWIRE?, and many common DSP

serial interfaces.

The ADC78H90 may be operated with independent

analog and digital supplies. The analog supply (AVDD)

can range from +2.7V to +5.25V, and the digital

supply (DV DD) can range from +2.7V to AVDD. 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 ADC78H90 is packaged in a 16-lead TSSOP

package. Operation over the industrial temperature

range of ?40°C to +85°C is ensured.