IC-WG Datasheet, PDF (1/11 Pages) IC-Haus GmbH – 14-BIT DIFFERENTIAL SCANNING OPTO ENCODER

iC-WG
14-BIT DIFFERENTIAL SCANNING OPTO ENCODER
FEATURES
♦ Excellent matching and reliability due to monolithic
construction with integrated photodiodes
♦ Short track pitch (600µm)
♦ 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
APPLICATIONS
♦ Optical position decoding with
14-bit resolution based on the
principle of differential scanning
CHIP
2.97mm × 8.71mm
BLOCK DIAGRAM
4.5..20V
14 VCC
C1
100nF
1 GND
DR
DSR (REF.)
AMPLIFIER
R1
50kΩ
VCC
1.2V
+
7 RSR
-
6 RGND
LED-CURRENT CONTROL
PN
AMPLIFIER
VCC
TRACK POSITION
PN
AMPLIFIER
PN
VCC
VCC
R2
50Ω
+
-
LED 8
LED
LGND 9
CSR 11
C2
100nF
5..25V
VCC _CONTROL
-
NERR 10
R3
10kΩ
+
ERROR
-
+
MONITOR IMP n.c.
COMPARATOR
VCC
PUSH-PULL
OUTPUT
IMN n.c.
A0 28
(see TRACK 0)
TRACK 0
TRACK 1
IP0 3
IN0 2
A1 ²⁷
IP1 ⁵
IN1 ⁴
PN
12 TIP
13 TIN
P
N
TEST
AMPLIFIER
COMPARATOR
VCC
PUSH-PULL
OUTPUT
A2 26
BIAS
(see TRACK 2)
iC-WG
BLCC WGC2
1.2V
TRACK 2
TRACK 3..13
A3
..13 25..15
VCC
AMPLIFIER
MONITOR
IM1 ^n.c.
©1999
iC-Haus GmbH
Integrated Circuits
Am Kuemmerling 18, D-55294 Bodenheim
Rev B0
Tel [phone]
Fax [phone]
http://www.ichaus.com