ic-wg iC-Haus, ic-wg Datasheet

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ic-wg

Manufacturer Part Number
ic-wg
Description
14-bit Differential Scanning Opto Encoder
Manufacturer
iC-Haus
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-wg Summary of contents

Page 1

... LED-CURRENT CONTROL - + - VCC AMPLIFIER + N TRACK POSITION COMPARATOR AMPLIFIER N N (see TRACK 0) COMPARATOR AMPLIFIER N N TRACK 3..13 (see TRACK 2) iC-WG BLCC WGC2 BIAS MONITOR 1.2V APPLICATIONS Optical position decoding with 14-bit resolution based on the principle of differential scanning CHIP 2.97mm 8.71mm VCC R2 VCC 50 8 LED LED 9 ...

Page 2

... DIFFERENTIAL SCANNING OPTO ENCODER DESCRIPTION The iC- optoelectronic detector IC for linear and angle measuring systems, e.g. glass scales or rotary encoders. Monolithically integrated are photodiodes, amplifiers and comparators as well as TTL-compatible push-pull output drivers. All 14 tracks are differentially evaluated. An integrated LED current control with driver stage makes it possible to directly connect a transmit LED with series resistor and also guarantees a constant optical received power ...

Page 3

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

Page 4

... DIFFERENTIAL SCANNING OPTO ENCODER ABSOLUTE MAXIMUM RATINGS Values beyond which damage may occur; device operation is not guaranteed. Item Symbol Parameter G001 VCC Supply Voltage G301 V(A) Voltage at Outputs A0..13 G302 I(A) Current in Outputs A0..13 G501 I(IM1) Current in Monitor Output IM1 G601 I(TIP) Current in TIP, TIN ...

Page 5

... DIFFERENTIAL SCANNING OPTO ENCODER ELECTRICAL CHARACTERISTICS Operating Conditions: VCC= 4.5..20V, Tj= -20..125 C, unless otherwise noted Item Symbol Parameter Total Device 001 VCC Permissible Supply Voltage 002 I(VCC) Supply Current in VCC, Outputs A0..13 hi 003 I(VCC) Supply Current in VCC, Outputs A0..13 lo 004 fo Cut-off Frequency, tracks 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

... DIFFERENTIAL SCANNING OPTO ENCODER DESCRIPTION OF FUNCTIONS LED Current Control The integrated LED current control with driver stage keeps the photocurrent of the reference photodiode DSR constant. Compensation is made for aging and dirt as well as for the decline in the efficiency of the transmit LED as the temperature rises. ...

Page 10

... Using the test aid The threshold current defined in electrical characteristic No.602 must be exceeded at both pins TIP and TIN simultaneously to activate the iC-WG’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 ...

Page 11

... We do not assume any guarantee that the specified circuits or procedures are free of copyrights of third parties. Copying - even as an excerpt - is only permitted with the approval of the publisher and precise reference to source. Order designation iC-WG Chip iC-WG BLCC WGC2 iC-WG BLCC WGC2 +WG1R WG1S Tel +49-6135-9292-0 Fax +49-6135-9292-192 http://www ...

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