10

ACS103 Issue 2.03 May 1996.

2

Note 4: The LED is switched on for approximately 1/5th of the time with a cycle of 160 µs at 9.216 MHz.

5: The ACS103 is at its best with low capacitance LEDs - Acapella is able to supply LEDs with lower than 20 pF capacitance.

Matching Characteristics (for specified operating conditions)

Parameter

Symbol

Min

Typ

Max

Units

Crystal tolerance

use parallel resonate crystal and

recommended padding capacitors

Ct

-100

0

100

ppm

Amplifier sensitivity input current

standard

double

Irec

650

500

500

300

-

nA

Maximum amplifier input current

Imax

30

50

-

mA

Rtrc placed between TRC and GND

Rtrc

0

-

-

Ω

LED current

with TRC floating:

peak current

average curent

(Note 4)

Icur

70

14

-

-

130

26

mA

LED capacitance

with Vr = 0 Volts

(Note 5)

Cled

-

-

100

pF

LED leakage current

Vr = 1.8 Volts

Cl

-

1

100

nA

LED reverse bias

Vr

1.3

1.5

1.8

V

ISO9001

CERTIFIED

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