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.