IC-WGBLCCWGC2 ICHAUS [IC-Haus GmbH], IC-WGBLCCWGC2 Datasheet

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IC-WGBLCCWGC2

Manufacturer Part Number
IC-WGBLCCWGC2
Description
14-BIT DIFFERENTIAL SCANNING OPTO ENCODER
Manufacturer
ICHAUS [IC-Haus GmbH]
Datasheet
iC-Haus GmbH
Integrated Circuits
Am Kuemmerling 18, D-55294 Bodenheim
iC-WG
14-BIT DIFFERENTIAL SCANNING OPTO ENCODER
FEATURES
BLOCK DIAGRAM
©1999
Excellent matching and reliability due to monolithic
construction with integrated photodiodes
Short track pitch (600 m)
Elimination of dark currents due to differential scanning
Photocurrent amplifier with high cut-off frequency
Current comparators with acurately tracked hysteresis
Current-limited push-pull outputs
Adjustable LED current control for constant receive power
Integrated power driver for the transmit LED
LED current monitor with error message output
Integrated test aid1
Low power consumption
Broad operating voltage range, from 4.5V to 20V
Available as 28-pin BLCC or as chip
Options: extended temperature range of -30..110 C,
customized packages, reticle assembly, code disc
100nF
C1
R1
50k
4.5..20V
14
12
13
1
7
6
VCC
GND
RSR
RGND
TIP
TIN
1.2V
P
P
P
P
TEST
P
DR
+
-
N
N
N
N
DSR (REF.)
N
LED-CURRENT CONTROL
TRACK POSITION
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
BIAS
VCC
iC-WG
BLCC WGC2
1.2V
VCC
(see TRACK 2)
(see TRACK 0)
+
-
COMPARATOR
COMPARATOR
VCC
+
+
-
-
TRACK 3..13
MONITOR
CONTROL
MONITOR
TRACK 0
TRACK 1
TRACK 2
AMPLIFIER
PUSH-PULL
PUSH-PULL
APPLICATIONS
CHIP
VCC
OUTPUT
OUTPUT
VCC
VCC
VCC
Optical position decoding with
14-bit resolution based on the
principle of differential scanning
LGND
NERR
LED
CSR
..13
IMP
IMN
A0
IP0
IN0
IP1
IN1
A2
A1
A3
IM1
8
9
11
10
n.c.
n.c.
28
3
2
27
5
4
26
25..15
n.c.
2.97mm
5..25V
VCC
R2
50
LED
10k
100nF
R3
C2
Tel
Fax +49-6135-9292-192
http://www.ichaus.com
Rev B0
ERROR
8.71mm
+49-6135-9292-0

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IC-WGBLCCWGC2 Summary of contents

Page 1

... DIFFERENTIAL SCANNING OPTO ENCODER FEATURES Excellent matching and reliability due to monolithic construction with integrated photodiodes Short track pitch (600 m) Elimination of dark currents due to differential scanning Photocurrent amplifier with high cut-off frequency Current comparators with acurately tracked hysteresis Current-limited push-pull outputs ...

Page 2

... If the LED current control deviates from its working range, this is indicated at the error message output. For the adjustment of a reticle the chip features two adjustment crosses and supplies the analog signals from three monitor photocurrent amplifiers. For exact radial alignment of the iC-WG (with reticle) to the code disk, two monitor photodiodes are arranged such that the track position can be checked (option, not available in the standard SMD package) ...

Page 3

... DIFFERENTIAL SCANNING OPTO ENCODER CHIP LAYOUT dimensions in m; chip size 2.97mm 8.71mm Rev B0, Page 3/11 ...

Page 4

... Parameter T1 Ta Operating Ambient Temperature Range 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. Conditions Fig. V(A)< V(A)> VCC V(LED)> VCC LED and NERR open LGND at GND MIL-STD 883, Method 3015, HBM, 100pF discharged through 1 ...

Page 5

... CM() Common Mode DPi to DNi 805 CR() Current Gain I(IPi) / I(DPi), I(INi) / I(DNi) 806 CR() Current Gain I(IPi) / I(DPi), I(INi) / I(DNi) 807 TC(CR) Temperature Coefficient of Current Gain CR 808 I0(IPi) Analog Output Leakage Current I0(INi) Conditions Tj C LED control active: R(RSR/RGND)= 140k , NERR=hi -20 I(LED) 8mA, I(A0..13)= 0; ...

Page 6

... DIFFERENTIAL SCANNING OPTO ENCODER ELECTRICAL CHARACTERISTICS Operating Conditions: VCC= 4.5..20V, Tj= -20..125 C, unless otherwise noted Item Symbol Parameter Photodiodes and Amplifiers with Analog Outputs, track 0 and 1 (continued) 809 fo(IPi) Analog Output Cut-off Frequency R(VCC/IPi, VCC/INi)= 50k , fo(INi) 810 fo(IPi) Analog Output Cut-off Frequency V(IPi,INi)= constant, ...

Page 7

... DIFFERENTIAL SCANNING OPTO ENCODER ELECTRICAL CHARACTERISTICS Operating Conditions: VCC= 4.5..20V, Tj= -20..125 C, unless otherwise noted Item Symbol Parameter Test Aid TIP, TIN 601 CR(TIP), Current Ratio CR(TIN) I(TIP) / I(DPi,DMP,DR), I(TIN) / I(DNi,DMN,DSR), I(TIP) / I(DM1) 602 It() Pull-Down Current at TIP, TIN; Test Aid Turn-on Threshold ...

Page 8

... DIFFERENTIAL SCANNING OPTO ENCODER ELECTRICAL CHARACTERISTICS Operating Conditions: VCC= 4.5..20V, Tj= -20..125 C, unless otherwise noted Item Symbol Parameter Monitor Photodiode DM1 with Amplifier (not available in standard BLCC package) 501 Aph Radiant Sensitive Area (DM1) 502 Ierr Error Current at Photodiode DM1 ...

Page 9

... If there is an optical feedback from the LED to the reference photodiode DSR, a voltage develops at pin CSR which is just high enough to satisfy the needs of the power driver for the required transmit current at pin LED. In this case the current ratio between I(RSR) and reference photodiode current I(DSR) is constant (electrical characteristics No ...

Page 10

... 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 NERR= low. If the series resistor for the LED limits the transmit current, this is indicated at NERR. Due to the principle of differential formation, however, the scanning is still guaranteed until the minimum brightness preset by the hysteresis of the comparators is achieved ...

Page 11

... D-55294 Bodenheim GERMANY This specification is for a newly developed product. iC-Haus therefore reserves the right to modify data without further notice. Please contact us to ascertain the current data. The data specified is intended solely for the purpose of product description and is not to be deemed guaranteed in a legal sense. Any claims for damage against us - regardless of the legal basis - are excluded unless we are guilty of premeditation or gross negligence ...

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