ADC78H89

Features:

Seven input channels
Variable power management
Independent analog and digital supplies
SPI™/QSPI™/MICROWIRE™/DSP compatible
Packaged in 16-lead TSSOP


Application

Automotive Navigation
Portable Systems
Medical Instruments
Mobile Communications
Instrumentation and Control Systems


Pinout




Specifications

Analog Supply Voltage AVDD .................−0.3V to 6.5V
Digital Supply Voltage DVDD .............−0.3V to AVDD +
                                                            0.3V, max 6.5V
Voltage on Any Pin to GND ..................−0.3V to AVDD
                                                                         +0.3V
Input Current at Any Pin (Note 3)................. ±10 mA
Package Input Current (Note 3)................... ±20 mA
Power Dissipation at TA = 25°C........... See (Note 4)
ESD Susceptibility (Note 5)
Human Body Model.......................................2500V
Machine Model...............................................250V
Soldering Temperature, Infrared,
10 seconds (Note 6) ..................................260°C
Junction Temperature............................. +150°C
Storage Temperature ..............−65°C to +150°C


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 successiveapproximation register architecture with an internal trackand- 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 guaranteed.