LIA120_12 Datasheet, PDF (2/10 Pages) IXYS Corporation – Optically Isolated Linear Error Amplifier

INTEGRATED CIRCUITS DIVISION
LIA120
Absolute Maximum Ratings (@ 25ºC)
Parameter
Photodiode Cathode-Anode Voltage
Photodiode Anode-Cathode Voltage
Input Voltage
Input DC Current
Total Power Dissipation (note 1)
Operating Temperature
Symbol
V_KAO
V_AKO
V_LED
I_LED
P_D
T
Ratings
20
0.5
9
20
145
-40 to +85
Units
V
V
V
mA
mW
ºC
Storage Temperature
T
1 _{Derate linearly from 25°C at a rate of 2.42 mW/ °C.}
-40 to +125 ºC
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.
Electrical Characteristics:
Parameter
Input Characteristics @ 25ºC
LED forward voltage
Reference voltage
Deviation of V_REF over temperature - See Note 1
Transfer Characteristics @ 25ºC
Current Transfer Ratio in Feedback (I_REF/I_LED)
Current transfer ratio (I_KA/I_LED)
Current Transfer Ratio Matching (I_KA/I_REF)
Feedback input current
Deviation of I_REF over temperature - See Note 1
Minimum drive current
Off-state error amplifier current
Error amplifier output impedance - See Note 2
Output Characteristics @ 25ºC
Cathode dark current
Cathode-Anode voltage breakdown
Isolation Characteristics @ 25ºC
Withstand insulation voltage
Resistance (input to output)
AC Characteristics @ 25ºC
Bandwidth (LED) - See Note 4
Common mode rejection ratio - See Note 5
Linearity
Conditions
I_LED = 5 mA, V_COMP = V_FB (Fig.1)
I_LED = 10 mA, V_COMP = V_FB (Fig.1)
T_A = -40 to +85°C
T_A = 25°C
T_A = -40 to +85°C
I_LED = 5mA, V_REF = 0.5V (Fig.2)
I_LED = 5 mA, V_COMP = V_FB, V_KA = 5 V (Fig. 4)
I_LED = 5mA, V_KA = 5.0V
I_LED = 10 mA, R1 = 10 kΩ (Fig.2)
T_A = -40 to +85°C
V_COMP = V_FB (Fig.1)
V_IN = 6 V, V_FB = 0 (Fig.3)
I_LED = 0.1 mA to 15 mA, V_COMP = V_FB, f<1 kHz (Fig.1)
V_IN = Open, V_KA = 10V (Fig. 3)
I_KA = 1µA
RH ≤ 50%, T_A = 25°C, t = 1 min (Note 3)
V_I-O = 500 V_DC (Note 3)
-
I_LED = 1.0 mA, R_L=100 kΩ, f=100 Hz (Fig. 5)
I_LED = 5 mA, 100 mV_PP
Symbol Min Typ Max Units
V_F
0.8 1.2 1.4 V
1.210 - 1.265
V_{REF 1.228 1.24 1.252} V
V_{REF (DEV)}
-
32
-
mV
K₁
1.0 2 3.0 %
K₂
1.0 2 3.0 %
K₃
85 100 115 %
I_REF
- 226 -
µA
I_{REF (DEV)}
-
110
-
µA
I_{LED (MIN)}
1
-
- mA
I_OFF
- 0.001 0.1 µA
IZ_OUTI
- 0.21 -

I_KAO
- 0.3 100 nA
BV_KA
20
-
-
V
V_ISO 3750 -
-
V_rms
R_I-O
-
10¹²
-

B_W
- 100 - kHz
CMRR - 70
-
dB
THD
- 70
-
dB
1. The deviation parameters V_REF(DEV) and I_REF(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) = {V_{REF (DEV)}/V_REF (T_A 25°C)} X 10⁶ / ∆T_A
where ∆T_A is the rated operating free-air temperature range of the device.
2. The dynamic impedance is defined as |Z_OUT| = ∆V_COMP/∆I_LED, 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.
2
www.ixysic.com
R03