1FEATURES

23• Seven 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: 500 KSPS

• DNL: ± 1 LSB (max)

• INL: ± 1 LSB (max)

• Power Consumption

– 3V Supply: 1.5 mW (typ)

– 5V Supply: 8.3 mW (typ)

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™, MICROWIRE™, and many common DSP

serial interfaces.

The ADC78H89 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 (DVDD) 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 ADC78H89 is packaged in a 16-lead

TSSOP package. Operation over the industrial

temperature range of −40°C to +85°C is ensured.