FOD2712V Datasheet FOD2712R1V, FOD2712R1, FOD2712R2V | P4-P6

FOD2712 Rev. 1.0.0 4

FOD2712 — Optically Isolated Error Ampliﬁer

Electrical Characteristics

(V

CC

= 12V, T

A

= 25°C unless otherwise speciﬁed)

Input Characteristics

Notes:

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:

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

. When the device is operating with two external

resistors (see Figure 2), the total dynamic impedance of the circuit is given by:

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

F

LED Forward Voltage I

LED

= 10mA, V

COMP

= V

FB

(Fig.1)

1.5 V

V

REF

Reference Voltage

-40°C to +85°C

25°C

V

COMP

= V

FB

, I

LED

= 10mA

(Fig.1)

1.221 1.259 V

1.228 1.240 1.252

V

REF (DEV)

Deviation of V

REF

over temperature

See Note 1

T

A

= -40 to +85°C 4 12 mV

∆

V

REF

∆

V

COMP

Ratio of Vref Variation to the Output of the

Error Ampliﬁer

I

LED

= 10 mA,

V

COMP

= V

REF

to 12V

(Fig. 2)

-1.5 -2.7 mV/V

I

REF

Feedback Input Current I

LED

= 10mA, R1 = 10k

Ω

(Fig. 3)

0.15 0.5 µA

I

REF (DEV)

Deviation of I

REF

Over Temperature

See Note 1

T

A

= -40 to +85°C 0.15 0.3 µA

I

LED (MIN)

Minimum Drive Current V

COMP

= V

FB

(Fig.1) 55 80 µA

I

(OFF)

Off-state Error Ampliﬁer Current V

LED

= 6V, V

FB

= 0 (Fig.4) 0.001 0.1 µA

|Z

OUT

| Error Ampliﬁer Output Impedance

See Note 2

V

COMP

= V

FB

,

I

LED

= 0.1mA to 15mA,

f < 1kHZ

0.25

Ω

∆V

REF

ppm/°C()

V

REF DEV()

/V

REF

T

A

25°C=(){}10

6

×

∆T

A

-----------------------------------------------------------------------------------------------------=

Z

OUT, TOT

=

∆V

∆I

--------Z

OUT

1

R1

R2

--------+×≈

FOD2712 Rev. 1.0.0 5

FOD2712 — Optically Isolated Error Ampliﬁer

Electrical Characteristics

(V

CC

= 12V, T

A

= 25°C unless otherwise speciﬁed) (Continued)

Output Characteristics

Transfer Characteristics

Isolation Characteristics

Switching Characteristics

Notes:

1. 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.

2. 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.

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I

CEO

Collector Dark Current V

CE

= 10V (Fig. 5) 50 nA

BV

CEO

Collector-Emitter Voltage

Breakdown

I

C

= 1.0mA 70 V

BV

ECO

Emitter-Collector Voltage

Breakdown

I

E

= 100µA 7 V

Symbol Parameter Test Conditions Min. Typ. Max. Unit

CTR Current Transfer Ratio I

LED

= 10mA, V

COMP

= V

FB

,

V

CE

= 5V (Fig. 6)

100 200 %

V

CE

(SAT)

Collector-Emitter

Saturation Voltage

I

LED

= 10mA, V

COMP

= V

FB

,

I

C

= 2.5mA (Fig. 6)

0.4 V

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I

I-O

Input-Output Insulation

Leakage Current

RH = 45%, T

A

= 25°C, t = 5s,

V

I-O

= 3000 VDC (Note 1)

1.0 µA

V

ISO

Withstand Insulation Voltage RH

≤

50%, T

A

= 25°C,

t = 1 min. (Note 1)

2500 Vrms

R

I-O

Resistance (Input to Output) V

I-O

= 500 VDC (Note 1) 10

12

Ω

Symbol Parameter Test Conditions Min. Typ. Max. Unit

B

W

Bandwidth Fig. 7 10 kHz

CMH Common Mode Transient

Immunity at Output HIGH

I

LED

= 0mA, V

cm

 = 10 V

PP

RL = 2.2kΩ (Fig. 8) (Note 2)

1.0 kV/µs

CML Common Mode Transient

Immunity at Output LOW

I

LED

= 10mA, V

cm

 = 10 V

PP

RL = 2.2kΩ (Fig. 8) (Note 2)

1.0 kV/µs

FOD2712 Rev. 1.0.0 6

FOD2712 — Optically Isolated Error Ampliﬁer

Test Circuits

I

(LED)

V

(LED)

V

COMP

V

COMP

I

CEO

V

CE

V

REF

V

CE

I

(LED)

V

F

V

REF

V

REF

82

3

2

3

V

6

7

5

I

(LED)

I

(LED)

I

(C)

I

(OFF)

I

REF

8

6

2

3

2

3

2

3

V

7

5

8

6

7

5

8

6

7

5

8

6

2

3

7

5

R1

8

6R1

R2

7

5

Figure 1. V

REF

, V

F,

I

LED

(min) Test Circuit

Figure 3. I

REF

Test Circuit

Figure 5. I

CEO

Test Circuit Figure 6. CTR, V

CE(sat)

Test Circuit

Figure 4. I

(OFF)

Test Circuit

Figure 2. ∆V

REF/

∆V

COMP

Test Circuit

FOD2712V

FOD2712V

Products related to this Datasheet