IC-OGBLCCOGC_技术文档

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 1/9

FEATURES

APPLICATIONS

Ë

Monolithic construction with integrated photodiodes ensures

excellent matching and technical reliability

Short track spacing of 600 µm

Elimination of dark currents through differential scanning

Photocurrent amplifier with high cut-off frequency

Comparators with precise signal-related hysteresis

Current-limited push-pull outputs

Adjustable LED current control for constant received power

Integrated power driver for the LED

LED current monitor with error message output

Integrated test aid

Low power consumption from 5V supply voltage

Available as a 20-pin BLCC or as chip

Options: extended temperature range of -40..110 °C,

customized packages, reticle assembly

Ë

Optical position decoding using

the principle of differential

scanning

Incremental and absolute

encoder with a resolution of up

to 8 bits

Ë

CHIP

3.05mm × 5.1mm

BLOCK DIAGRAM

VCC

5V +/- 10%

VCC

20

R2

30Ω

R3

10kΩ

LED

5

12 : 1

C1

100nF

1.2V

LED-CURRENT CONTROL

DDC

D1

LED

ISET

AGND

7

6

NER

10

ERROR

R1

MONITOR

27kΩ

AMPLIFIER

C2

100nF

CSR

1

COMPARATOR PUSH-PULL

OUTPUT

AMPLIFIER

IP

IN

S0

19

2

DP0

DN0

NI0

ANALOG

OUTPUT

TRACK 0

TRACK 1

TRACK 2

S1

18

NI1

S2

DP1

DN1

DN2

3

(see TRACK 0)

17

NI2

4

DP2

(see TRACK 0)

COMPARATOR PUSH-PULL

OUTPUT

AMPLIFIER

S3

16

DP3

DN3

TRACK 3

S4

S5

S6

S7

15

14

13

12

DP4

DP5

DP6

DN4

DN5

DN6

DN7

(see TRACK 3)

TRACK 4

TRACK 5

TRACK 6

TRACK 7

DP7

c2

TIP

TIN

9

8

1

iC-OG

GND

11

BIAS

TEST

BLCC OGC

c2

1.2V

www.ichaus.com

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 2/9

DESCRIPTION

The iC-OG device is an optoelectronic detector IC for linear and angle measuring systems, such as glass

scales or shaft encoders, for example. Photodiodes, amplifiers, comparators and TTL-compatible push-pull

output drivers are integrated monolithically. Each of the 8 tracks is evaluated differentially; there are also

analog outputs available from three of the special feature tracks.

The integrated LED current control with a driver stage enables a transmit diode with series resistor to be

directly connected and ensures a constant optical received power. The setpoint for the receive current is

adjusted using an external resistor. Should the LED current control deviate from its working range, this is

reported at the error message output.

Two test pins allow a full test of all functions to be carried out excluding the photodiodes.

All push-pull and analog outputs are protected against ESD and short-circuit damage. The error message

output NER is also protected against short-circuiting and can be used in bus systems due to its open-collector

output.

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 3/9

CHIP LAYOUT

Dimensions in µm; chip size 3.05 mm × 5.1 mm

PAD DESCRIPTION

Name

Function

CSR

NI0

NI1

NI2

LED

External capacitor for LED control

Track 0 Analog Push-Pull Output

Track 1 Analog Push-Pull Output

Track 2 Analog Push-Pull Output

LED Driver Output

AGND Reference Ground for ISET and CSR circuitry

ISET

TIN

TIP

NER

GND

S7

LED Current Control Setup

Negative Test Aid Input

Positive Test Aid Input

Error Message Output, low active

Ground

Track 7 Push-Pull Output

..

S0

VCC

Track 0 Push-Pull Output

+5V Supply Voltage

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 4/9

ABSOLUTE MAXIMUM RATINGS

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

Item Symbol Parameter

Conditions

Fig.

Unit

Min.

-0.3

-3

Max.

G001 VCC

G301 V(S)

G302 I(S)

G501 V(NI)

G502 I(NI)

Supply Voltage

6

V

Voltage at Outputs S0..7

Current in Outputs S0..7

Voltage at Analog Outputs NI0..2

Current in Analog Outputs NI0..2

Current in TIP, TIN

VCC+0.3

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

3

mA

V

-0.3

-3

VCC+0.3

3

1

mA

G601 I(TIP)

I(TIN)

-1

G701 I(ISET)

Current in ISET

-1

-5

0.1

mA

V

G702 I(AGND) Current in AGND

5

G703 I(LED)

G704 I(LED)

Current in LED

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

0< V(LED) < VCC

-3

3

0

150

G705 V(CSR) Voltage at CSR

G706 I(CSR) Current in CSR

GA01 V(NER) Voltage at NER

-0.3

-3

VCC+0.3

3

6

2

mA

V

-0.3

E001 Vd()

ESD Susceptibility

HBM, 100 pF discharged

kV

through 1.5 kΩ

TG1 Tj

TG2 Ts

Junction Temperature

Storage Temperature

-40

125

°C

see package specification

THERMAL DATA

Operating Conditions: VCC= 5V ±10%

Item Symbol Parameter

Conditions

Fig.

Unit

Min.

Typ.

Max.

T1 Ta

Operating Ambient Temperature

Range

see package specification

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.

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 5/9

ELECTRICAL CHARACTERISTICS

Operating Conditions: VCC= 5V ±10%, Tj= -40..125 °C, unless otherwise noted.

Item Symbol Parameter

Conditions

Tj

EC

Fig.

Unit

Min.

Typ.

Max.

Total Device

001 VCC

Permissible Supply Voltage

4.5

5.5

V

Range

002 I(VCC)

Supply Current in VCC,

Outputs S0..7 hi

LED control active:

R(ISET/AGND)= 140kΩ,

I(LED). 8mA, NER=hi;

I(DP0..7)= 30nA,

I(DN0..7)= 3nA,

10

mA

I(S0..7)= 0;

003 I(VCC)

Supply Current in VCC,

Outputs S0..7 lo

LED control active:

R(ISET/AGND)= 14kΩ,

I(LED). 80mA, NER=hi;

I(DP0..7)= 3nA,

mA

I(DN0..7)= 30nA,

I(S0..7)= 0;

004 fo

Cut-off Frequency,

tracks 0..7

sinusoidal waveform,

I(DP0..7)= 3..30nA

I(DN0..7)= 30..3nA

100

200

kHz

005 tp(D-A)

006

Propagation Delay

see No. 4

2.5

1.5

µs

Cut-off Frequency,

tracks 0..7

sinusoidal waveform,

I(DP0..7)= 6..60nA

I(DN0..7)= 60..6nA

kHz

007

Propagation Delay

see No. 6

µs

Photodiodes and Amplifiers, tracks 0..7

101 Aph(D) Radiant Sensitive Area

102 S(λ)max Spectral Sensitivity

0.2 × 0.3

0.5

mm²

A/W

nm

λ= 850nm

103 λar

104 I(D)

105 CM()

Range of Spectral Sensitivity

S(λar)= 0.1×S(λ)max

500

0.85

8

1050

90

Permissible Photocurrent

Common Mode DPi to DNi

nA

1

1.15

Difference Comparators, tracks 0..7

201 Hys

Hysteresis referred to

[I(DPi) + I(DNi)] /2

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

11

17

%

Push-Pull Outputs S0..7

301 Vs()hi

302 Vs()hi

303 Vs()lo

Saturation Voltage hi

Vs()hi= VCC-V(); I()= -40µA

Vs()hi= VCC-V(); I()= -400µA

I()= 1.6mA

0.95

1.05

0.4

V

27

0.69

0.83

Saturation Voltage hi

Saturation Voltage lo

V

0.22

-4.6

7.3

304 Isc()hi

305 Isc()lo

306 tr()

Short-Circuit Current hi

Short-Circuit Current lo

Slew-Rate hi

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

V()= 0.4V..VCC

CL()= 30pF

-7

1.8

24

-1.4

13

mA

130

V/µs

27

61

307 tf()

Slew-Rate lo

CL()= 30pF

40

0.4

-1.5

380

1.5

V/µs

115

308 Vc()hi

309 Vc()lo

Clamp Clamp Voltage hi

Clamp Clamp Voltage lo

Vc()hi= V()-VCC;

S()= hi, I()= 3mA

V

S()= lo, I()= -3mA

-0.4

V

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 6/9

ELECTRICAL CHARACTERISTICS

Operating Conditions: VCC= 5V ±10%, Tj= -40..125 °C, unless otherwise noted.

Item Symbol Parameter

Conditions

Tj

EC

Fig.

Unit

Min.

Typ.

Max.

Analog Outputs NI0..2

501 CR()

502 I0()

503 fo()

Current Ratio

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

V(NIi)= 0.3V..VCC-1.2V,

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

550

-1.5

100

1250

1.5

27

720

Leakage Current

Cut-off Frequency

V(NI)= 0.3V..VCC-1.2V,

I(DPi,DNi)= 0

µA

V(NIi)= constant,

sinussoidal waveform,

I(DPi)= 3..30nA,

I(DNi)= 30..3nA

kHz

504 fo()

505 fo()

Cut-off Frequency

V(NIi)= constant,

sinussoidal waveform,

I(DPi)= 6..60nA,

I(DNi)= 60..6nA

200

50

kHz

R(VCC/NIi)= 50kΩ,

R(NIi/GND)= 50kΩ,

CL()= 30pF

80

506 Vc()hi

507 Vc()lo

Clamp Voltage hi

Clamp Voltage lo

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

I()= -3mA

0.4

1.5

V

-1.5

-0.4

Test Aid TIP, TIN

601 CR()

Current Ratio

Test aid active,

I()= 2..200µA

750

2.5

1100

1600

125

I(TIP) / I(DPi,DDC)

and I(TIN) / I(DNi)

602 It()

Pull-Down Current

V()= 0.4V

µA

(Test Aid Turn-on Threshold)

-40

27

85

14

19

25

28

125

603 V()on

Turn-on Voltage

Test aid active,

I(TIP)= 2..200µA and

I(TIN)= 100µA, or

I(TIP)= 100µA and

I(TIN)= 2..200µA

-40

27

85

1.9

1.6

1.2

1.1

2.4

2.1

1.8

1.6

2.7

2.4

2.1

1.9

V

125

LED Current Control ISET, AGND, LED, CSR

701 ISUM

Permissible Sum Current of

photodiodes DP0, DN0, DP1,

DN1

ISUM= I(DP0) +I(DN0)

+I(DP1) +I(DN1)

0

360

nA

702 I(LED)

Permis. Driver Current in LED

80

mA

703 Vs(LED) Saturation Voltage at LED

I(LED)= 80mA, I(ISET)> 20µA,

V(CSR)= VCC

1.35

V

-40

27

85

0.96

0.88

0.79

0.72

125

704 V(ISET) Voltage at ISET

R(ISET/AGND)= 10..150kΩ

1.15

8

1.22

1.35

15

V

705 CR()

Current Ratio

V(CSR)= 0.3V, ISUM= 0,

I(ISET) / I(CSR)

R(ISET)= 10..150kΩ

-40

27

12.0

11.9

85

125

11.75

11.65

706 CR()

707 Vc()hi

708 Vc()lo

Current Ratio

I(CSR) / ISUM

V(CSR)= 1..3V,

I(ISET)= 0

70

0.4

-1.5

92

130

1.5

Clamp Voltage hi

at ISET, LED, CSR

Vc()hi= V()-VCC;

I()= 3mA

V

Clamp Voltage lo

VCC= 0V, I()= -3mA

-0.4

at ISET, LED, CSR

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 7/9

ELECTRICAL CHARACTERISTICS

Operating Conditions: VCC= 5V ±10%, Tj= -40..125 °C, unless otherwise noted.

Item Symbol Parameter

Conditions

Tj

EC

Fig.

Unit

Min.

Typ.

Max.

Control Monitor NER

801 Vs()

802 Isc()

803 I0()

Saturation Voltage lo

I(NER)= 3.2mA

0.27

15

0.4

27

10

V

Short-Circuit Current lo

V(NER)= VCC

mA

µA

Collector Off-state Current

NER: off, V(NER)= 0..6V

DESCRIPTION OF FUNCTIONS

LED current control

The integrated LED current control with a driver stage controls the LED in accordance with the sum of the

photocurrents from the tracks 0 and 1. Compensation is made for age and dirt, as well as for the reduced

efficiency of the LED caused by rises in temperature.

Fig. 1: LED Current Control and Monitoring

The photodiodes DPO, DNO, DP1 and DN1 act as reference diodes. The sum is output via a current sink to

the comparison point pin CSR. Simultaneously, the resistor R1 at pin ISET (the voltage at the ISET pin is kept

at a constant of approximately 1.22V) supplies a reference current for the current source from VCC, which also

works towards the comparison point pin CSR. The comparison point also receives the amplified current from

the compensation diode DDC in order to compensate for dark currents and for the amplifier input currents.

If there is an optical feedback from the LED to the reference photodiodes, the voltage at the CSR pin adjusts

to satisfy the needs of the power driver for the required transmit current at pin LED. In this instance, the

voltage ratio between I(ISET) and the sum of the photodiode current ISUM is constant (Electrical

Characteristics Nos. 706 and 707). The current flowing through the resistor R1 is the setpoint for the control

and directly presets the desired level of illumination.

An internal capacitor ensures that the control is stable. The comparison point pin CSR is lead out in the

BLCC20 package, enabling an external capacitor C2 to be connected to adapt the control behaviour. Lower

values for R1 require larger values for C2, which also improve the power-supply rejection ratio for the control.

Values from 10nF upwards are recommended.

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 8/9

A resistor in series with the LED limits the current in pin LED and sets the operating limits of the control.

The optical feedback between the LED and the reference photodiodes should be good enough to establish an

LED current of less than 15mA at room temperature. Only under these conditions does the power driver have

a sufficient current reserve to correct the LED's decline in efficiency even at high temperatures.

Control Monitor and Error Message Output

The control monitor observes the potential at the CSR pin. Voltages which bring the power driver to saturation

or off-state are recognized and indicated at the open-collector output by NER= low.

APPLICATIONS INFORMATION

Using the test aid

The threshold current defined in the electrical characteristic No. 602 must be exceeded at both pins TIP and

TIN simultaneously to activate the iC-OG's built-in test aid. Once it has been activated, the test aid does not

switch back to off-state until the current drops below approx. 1µA.

A clamp circuit as shown in Figure 2 also prevents falling below the test aid turn-on threshold for a short time.

The output polarity of the iC-OG is to be changed over with the switch.

Fig. 2: Wiring the test aid

This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained

herein, design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the

current data.

Copying -- even as an excerpt -- is only permitted with iC-Haus approval in writing and precise reference to source.

iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions

in the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of

merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which

information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications

or areas of applications of the product.

iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade

mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.

As a general rule our developments, IPs, principle circuitry and range of Integrated Circuits are suitable and specifically designed for appropriate use in

technical applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. In principle the

range of use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade

statistics issued annually by the Bureau of Statistics in Wiesbaden, for example, or to any product in the product catalogue published for the 2007 and

following exhibitions in Hanover (Hannover-Messe).

We understand suitable application of our published designs to be state-of-the-art technology which can no longer be classed as inventive under the

stipulations of patent law. Our explicit application notes are to be treated only as mere examples of the many possible and extremely advantageous uses our

products can be put to.

iC-OG

8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

Rev C1, Page 9/9

ORDERING INFORMATION

Type

Package

Order designation

iC-OG

-

iC-OG Chip

iC-OG BLCC OGC

BLCC OGC

For technical support, information about prices and terms of delivery please contact:

iC-Haus GmbH

Tel +49-6135-9292-0

Fax +49-6135-9292-192

http://www.ichaus.com

E-mail sales@ichaus.com

Am Kuemmerling 18

D-55294 Bodenheim

GERMANY

Appointed local distributors: http://www.ichaus.de/support_distributors.php


型号：	IC-OGBLCCOGC
厂家：	IC-HAUS GMBH
描述：	8-BIT DIFFERENTIAL SCANNING OPTO ENCODER 8位差分扫描光电编码器光电编码器
文件：	总9页 (文件大小：207K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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