LIA120STR datasheet(2/9 Pages) CLARE

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LIA120

Rev. 2.0

Absolute Maximum Ratings are stress ratings. Stresses in

excess of these ratings can cause permanent damage to

the device. Functional operation of the device at conditions

beyond those indicated in the operational sections of this

data sheet is not implied.

Parameter

Conditions

Symbol Min

Typ

Max Units

Input Characteristics @ 25°C

LED forward voltage

LED = 5 mA, VCOMP = VFB (Fig.1)

0.8

1.2

1.4

Reference voltage

LED = 10 mA, VCOMP = VFB (Fig.1)

TT = -40 to +85°C

REF

1.210

1.265

TT = 25°C

1.228 1.24

1.252

Deviation of V

REF over temperature - See Note 1

TT = -40 to +85°C

REF (DEV)

Transfer Characteristics @ 25°C

Current Transfer Ratio in Feedback (I

REF/I

REF

REF LED)

LED = 5mA, VREF = 0.5V (Fig.2)

1.0

3.0

Current transfer ratio (I

KA/I

KA LED)

LED = 5 mA, VCOMP = VFB, VKA = 5 V (Fig. 4)

1.0

3.0

Current Transfer Ratio Matching (I

KA/I

KA REF)

LED = 5mA, VKA = 5.0V

100

115

Feedback input current

LED = 10 mA, R1 = 10 kΩ (Fig.2)

REF

226

µA

Deviation of I

REF over temperature - See Note 1

TT = -40 to +85°C

REF (DEV)

110

µA

Minimum drive current

COMP = VFB (Fig.1)

LED (MIN)

Off-state error amplifier current

IN = 6 V, VFB = 0 (Fig.3)

OFF

0.001

0.1

µA

Error amplifier output impedance - See Note 2

LED = 0.1 mA to 15 mA, VCOMP = VFB, f<1 kHz (Fig.1)

OUTI

0.21

Ohm

Output Characteristics @ 25°C

Cathode dark current

IN = Open, VKA = 10V (Fig. 3)

KAO

0.3

100

Cathode-Anode voltage breakdown

KA = 1µA

Isolation Characteristics @ 25°C

Withstand insulation voltage

RH ≤ 50%, T

50%, T

50%, T = 25°C, t = 1 min (Note 3)

ISO

3750

rms

Resistance (input to output)

I-O = 500 VDC (Note 3)

I-O

1012

Ω

AC Characteristics @ 25°C

Bandwidth (LED) - See Note 4

100

kHz

Common mode rejection ratio - See Note 5

LED = 1.0 mA, RL = 100 kΩ, f = 100 Hz (Fig. 5)

CMRR

Linearity

LED = 5 mA, 100 mVPP

THD

1. The deviation parameters V

REF(DEV) and IREF(DEV) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature

coefficient of the reference input voltage, ∆V

REF, is defined as:

|∆V

REF| (ppm/°C) = {VREF (DEV)/VREF (TA

(T 25°C)} X 106 / ∆T

where ∆T

TT is the rated operating free-air temperature range of the device.

2. The dynamic impedance is defined as |Z

OUT| = ∆VCOMP/∆ILED, for the application circuit in Figure 6, |Zout| = K1R1

3. Device is considered as a two terminal device: Pins 1, 2, 3 and 4 are shorted together and Pins 5, 6, 7 and 8 are shorted together.

4. See compensation section for calculating bandwidth of LIA120.

5. Common mode transient immunity at output high is the maximum tolerable (positive) dVcm/dt on the leading edge of the common mode impulse signal, Vcm, to assure that the output will remain high.

Common mode transient immunity at output low is the maximum tolerable (negative) dVcm/dt on the trailing edge of the common pulse signal,Vcm, to assure that the output will remain low.

Electrical Characteristics:

Parameter

Symbol Ratings Units

Photodiode Cathode-Anode Voltage

KAO

Photodiode Anode-Cathode Voltage

AKO

0.5

Input Voltage

LED

Input DC Current

LED

Total Power Dissipation (note 1)

145

Operating Temperature

-40 to +85

°C

Storage Temperature

-40 to +125

°C

Absolute Maximum Ratings (@ 25˚ C)

1 Derate linearly from 25°C at a rate of 2.42 mW/ °C.

, for the application circuit in Figure 6, |Zout| = K

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