AH8502

Document number: DS37683 Rev. 1 - 2

2 of 19

www.diodes.com

February 2015

© Diodes Incorporated

AH8502

Typical Applications Circuit

AH8502

OUTPUT

GND

CNTRL

Note:

supply pin as possible.

Pin Descriptions

Pin Number

Pin Name

Function

1

OUTPUT

Output Pin

2

NC

No Connection (Note 5)

3

Power Supply Input

4

CNTRL

Device Control Pin:

The CNTRL pin allows to select the modes of operation (Micropower Mode, Turbo Mode and

External-Drive Mode) and to adjust the sampling rate in External Drive Mode to minimize the power

consumption.

When CNTRL = GND or floating, the device operates in default Micropower Mode with 24Hz

sampling rate and consumes 13µA typical at 1.8V. The CNTRL pin is internally pulled low.

6.25kHz typical consuming 1.01mA typical at 1.8V.

In External Drive Mode, an external PWM signal can be used to drive the CNTRL pin to adjust the

sampling frequency from 24Hz typical up to 7.14kHz typical. If external PWM pulse is used, the

minimum pulse width needed on the CNTRL pin to start a sample/conversion is 20µs typical. We

recommend using a pulse width of 40µs minimum. The minimum sample and conversion cycle

is140µs typical.

5

GND

Ground Pin

6

NC

No Connection (Note 5)

Pad

Pad

The center exposed pad

– No connection internally.

The exposed pad can be left open (unconnected) or tied to the GND on the PCB layout.

Note:

5.

NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.