AME7106 datasheet(13/20 Pages) AME

13 / 20 page

AME, Inc.

AME7106/AME7106A/AME7106R

AME7107/AME7107A/AME7107R

3-1/2 Digit A/D Converter

High Accuracy, Low Power

Power Supplies

The AME7107 is designed to work from ±5V supplies.

However, if a negative supply is not available, it can be

generated from the clock output with two diodes, two

capacitors, and an inexpensive IC. The 7660 DC to DC

converter may also be used to generate -5V from +5V.

Low Battery Flag (LB)

The low battery flag is set when the supply voltage (V+

to V-) is lower than seven volts, typical. Once the LB is

set, the waveform of the LB will be out of phase with

the BP (Back Plane) to turn on a low battery annuncia-

tor for AME7106; LB pin will be low (Ground)

for AME7107 and is capable to sink 8 mA to turn on a

LED indicator.

AME7107 Power Dissipation Reduction

The AME7107 sinks the LED display current and this

generates heat in the IC package. If the internal volt-

age reference is used, the fluctuating chip temperature

can cause the display to change reading. The AME7107

package power dissipation can be reduced by reducing

the LED common anode voltage.

A typical LED has 1.8 volts across it, at 7mA. When its

common anode is connected to +5V, the AME7107

AME7106 数据表(PDF) 13 Page - Analog Microelectronics