ADG506A/ADG507A

–7–

REV. C

SINGLE SUPPLY AUTOMOTIVE APPLICATION

The excellent performance of the multiplexers under single

supply conditions makes the ADG506A/ADG507A suitable in

applications such as automotive and disc drives where only

positive power supply voltages are normally available. The fol-

lowing application circuit shows the ADG507A connected as an

8-channel differential multiplexer in an automotive, data acqui-

sition application circuit.

Figure 7. ADG507A in a Single Supply Automotive Data Acquisition Application

The AD7580 is a 10-bit successive approximation ADC, which

has an on-chip sample-hold amplifier and provides a conversion

result in 20

µs. The ADC has differential analog inputs and is

configured in the application circuit for a span of 2.5 V over a

common-mode range 0 V to + 5 V. Wider common-mode ranges

can be accommodated. See the AD7579/AD7580 data sheet for

more details. The complete system operates from +12 V (+10%)

and +5 V supplies. The analog input signals to the ADG507A

contain information such as temperature, pressure, speed etc.

Test Circuit 9. Charge Injection