2.8mm × 2.08mm

NI0

NI1

NI2

ANALOG

OUTPUT

ANALOG

BIAS

OUTPUT

PUSH-PULL

DN2

DN1

DN0

TRACK 0

DP2

DP1

DP0

COMPARATOR

AMPLIFIER

TRACK 2

TRACK 1

VCC

GND

iC-OF

BLCC OF3C

iC-OF

3-BIT OPTO ENCODER

FEATURES

APPLICATIONS

Monolithic construction with integrated photodiodes ensures
excellent matching and technical reliability

Short track spacing of 600

Elimination of dark current effects through differential
scanning

Photocurrent amplifier with high cut-off frequency

Comparators with precise signal-related hysteresis

Current-limited push-pull outputs

Analog outputs as current source/sink additionally

Low power consumption from 5V supply voltage

Low board space requirements

Options: extended temperature range of -30..110

customized packages, COB and reticle assembly

Optical position decoding for
incremental encoders using the
principle of differential scanning

CHIP

BLOCK DIAGRAM

Š2000

Rev B1

iC-Haus GmbH

Tel +49-6135-9292-0

Integrated Circuits

Fax +49-6135-9292-192

Am Kuemmerling 18, D-55294 Bodenheim

http://www.ichaus.com

iC-OF

3-BIT OPTO ENCODER

Rev B1, 2/6

DESCRIPTION

The iC-OF device is an optoelectronic detector IC for linear and angle measuring systems, such as shaft
encoders, for example.

Photodiodes, amplifiers, comparators and TTL-compatible push-pull output drivers are integrated
monolithically. Each of the 3 tracks is evaluated differentially; there are also analog outputs available.

The outputs are protected against ESD and short-circuit damage.

CHIP LAYOUT

dimensions in ľm; chip size 2.8mm × 2.08mm

PAD DESCRIPTION

Name

Function

VCC

+5V Supply Voltage

NI0

Track 0 Analog Current Output

NI1

Track 1 Analog Current Output

NI2

Track 2 Analog Current Output

Track 0 Push-Pull Output

Track 1 Push-Pull Output

Track 2 Push-Pull Output

GND

Ground

iC-OF

3-BIT OPTO ENCODER

Rev B1, 3/6

All voltages are referenced to ground unless otherwise noted.
All currents into the device pins are positive; all currents out of the device pins are negative.

ABSOLUTE MAXIMUM RATINGS

Values beyond which damage may occur; device operation is not guaranteed.

Item

Symbol

Parameter

Conditions

Fig.

Unit

Min.

Max.

G001 VCC

Supply Voltage

-0.3

G301 V(S)

Voltage at Outputs S0..2

-0.3

VCC+0.3

G302 I(S)

Current in Outputs S0..2

V(S)< 0V or V(S)> VCC

-3

G501 V(NI)

Voltage at Analog Outputs NI0..2

-0.3

VCC+0.3

G502 I(NI)

Current in Analog Outputs NI0..2

-3

E001 Vd()

ESD-Susceptibility at all pins

MIL-STD 883, Method 3015,
HBM 100pF/1.5k

TG1 Tj

Chip Temperature

-30

125

TG2 Ts

Storage Temperature

see package specification

THERMAL DATA

Operating Conditions: VCC= 5V ą10%

Item

Symbol

Parameter

Conditions

Fig.

Unit

Min.

Typ.

Max.

Operating Ambient Temperature
Range

see package specification

iC-OF

3-BIT OPTO ENCODER

Rev B1, 4/6

ELECTRICAL CHARACTERISTICS

Operating Conditions:
VCC= 5V ą10%; Tj= -30..125

C, unless otherwise noted.

Item

Symbol

Parameter

Conditions

Fig.

Unit

Min.

Typ.

Max.

Total Device

001

VCC

Permissible Supply Voltage

4.5

5.5

002

I(VCC)

Supply Current in VCC,
Outputs S0..2 hi

I(DP0..7)= 30nA, I(DN0..7)= 3nA,
I(S0..7)= 0

2.3

003

I(VCC)

Supply Current in VCC,
Outputs S0..2 lo

I(DP0..7)= 3nA, I(DN0..7)= 30nA,
I(S0..7)= 0

2.3

004

Cut-off Frequency,
tracks 0..2

sinusoidal waveform,
I(DP0..7)= 3..30nA,
I(DN0..7)= 30..3nA

100

kHz

005

tp(D-S)

Propagation Delay

see No. 4

2.5

ľs

006

Propagation Delay,
tracks 0..2

sinusoidal waveform,
I(DP0..7)= 6..60nA
I(DN0..7)= 60..6nA

200

kHz

007

tp(D-S)

Propagation Delay

see No. 6

1.5

ľs

Photodiodes and Amplifiers, tracks 0..2

101

Aph(D)

Radiant Sensitive Area

0.2 × 0.3

mm˛

102

)max

Spectral Sensitivity

= 850nm

0.5

A/W

103

Range of Spectral Sensitivity

Se(

ar)= 0.1×S(

)max

500

1050

104

I(D)

Permissible Photocurrent

105

CM()

Common Mode DPi to DNi

0.85

1.15

Difference Comparators, tracks 0..2

201

Hys

Hysteresis refered to
[I(DPi) + I(DNi)] /2

I(DPi, DNi)= 3..90nA

Push-Pull Outputs S0..2

301

Vs()hi

Saturation Voltage hi

Vs()hi= VCC-V();
I()= -40ľA

-30

27
70

125

0.79
0.69
0.58
0.51

0.9

V
V
V
V
V

302

Vs()hi

Saturation Voltage hi

Vs()hi= VCC-V();
I()= -400ľA

-30

27
70

125

0.90
0.83
0.74
0.68

1.0

V
V
V
V
V

303

Vs()lo

Saturation Voltage lo

I()= 1.6mA

-30

27
70

125

0.21
0.22
0.25
0.27

0.4

V
V
V
V
V

304

Isc()hi

Short-Circuit Current hi

V()= 0V..VCC-1.2V

-7

-4.6

-1.5

305

Isc()lo

Short-Circuit Current lo

V()= 0.4V..VCC

1.8

7.3

306

SRhi

Slew-Rate hi

CL()= 30pF

130

V/ľs
V/ľs

307

SRlo

Slew-Rate lo

CL()= 30pF

115

330

V/ľs
V/ľs

308

Vc()hi

Clamp Voltage hi

Vc()hi= V()-VCC; S= hi, I()= 3mA

0.4

1.5

309

Vc()lo

Clamp Voltage lo

S= lo, I()= -3mA

-1.5

-0.4

iC-OF

3-BIT OPTO ENCODER

Rev B1, 5/6

ELECTRICAL CHARACTERISTICS

Operating Conditions:
VCC= 5V ą10%; Tj= -30..125

C, unless otherwise noted.

Item

Symbol

Parameter

Conditions

Fig.

Unit

Min.

Typ.

Max.

Analog Outputs NI0..2

501

CR()

Current Ratio
I(NIi) / (I(DPi)-I(DNi))

V(NIi)= 0.3V..VCC-1.2V,
I(DPi)= 3..90nA, I(DNi)= 90..3nA

550

720

850

502

I0()

Leakage Current

V(NI)= 0.3V..VCC-1.2V,
I(DPi,DNi)= 0

-1.5

1.5

ľA

503

fo()

Cut-off Frequency

V(NIi)= constant,
sinussoidal waveform,
I(DPi)= 3..30nA, I(DNi)= 30..3nA

100

kHz

504

fo()

Cut-off Frequency

V(NIi)= constant,
sinussoidal waveform,
I(DPi)= 6..60nA, I(DNi)= 60..6nA

200

kHz

505

fo()

Cut-off Frequency

R(VCC/NIi)= 50k

R(NIi/GND)= 50k

, CL()= 30pF

kHz

506

Vc(S)hi

Clamp Voltage hi

Vc()hi= V()-VCC; I()= 3mA

0.4

1.5

507

Vc(S)lo

Clamp Voltage lo

I()= -3mA

-1.5

-0.4

APPLICATIONS INFORMATION

Wiring of the analog outputs NI0..2
The analog outputs each consist of two current sources in a push-pull configuration. One of these works towards
GND as a sink, the other works as a source coming from VCC. The voltage swing at the output pins NI0..2 is
determined by the external wiring - the saturation voltage of the current sources must be taken into account.

The simplest configuration is to connect the outputs to a voltage divider consisting of two resistors, wired from
VCC against GND (with 50k

respectively, for example). Any resulting load capacities can reduce the cutoff

frequency of the analog signals.

In view of the suppression of the supply voltage, however it may be preferable to use an op-amp as a current-
voltage converter (transconductance amplifier) if the reference potential is suitably stable.

Part Number iC-OF