ICHAUS LSHC2S26

preliminary
iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 1/7
FEATURES
APPLICATIONS
♦ Monolithic array of independent photosensors with excellent
matching
♦ Compact photosensor size of 800 µm x 330 µm enabling
smaller encoder systems
♦ Moderate alignment tolerance due to a track pitch of 1.08 mm
♦ Ultra low dark currents for operation to high temperature
♦ Low noise amplifiers with high transimpedance of typ. 4 MΩ
♦ Short-circuit-proof, low impedance voltage outputs for
enhanced EMI tolerance
♦ Low power consumption from single 5 V supply
♦ Operational temperature range of -40 to 125 °C
♦ Space saving 15-pin optoBGA package (RoHS compatible)
♦ Available options
- reticle assembly, code discs
- customized COB modules
♦ Optical position encoding from
analog sine/cosine signals
♦ Incremental encoders with
interpolation
♦ Absolute position encoders
using nonius scales
PACKAGES
15-pin optoBGA
Chip
6.2 mm x 5.2 mm
2.88 mm x 3.37 mm
BLOCK DIAGRAM
VCC
VREF
GND
iC-LSHC
-
REFERENCE
VOLTAGE
+
PS_N
-
DPS_N
+
NS_N
-
DPC_N
DPS_N
DPC_N
DNC_N
DNS_N
DNS_N
-
DNC_N
-
DPS_M
DPC_M
DPS_M
DPC_M
-
DNC_M
DNS_M
DNS_M
+
Copyright © 2009 iC-Haus
-
PC_M
DNC_M
-
NC_M
+
DPS_S
+
NS_S
NC_N
+
+
PS_S
+
+
NS_M
PC_N
+
+
PS_M
-
DPC_S
DPS_S
DPC_S
DNC_S
DNS_S
DNS_S
-
PC_S
+
DNC_S
-
NC_S
+
http://www.ichaus.com
preliminary
iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 2/7
DESCRIPTION
The iC-LSHC photosensor is a general purpose optoelectronic scanner made to suit a variety of encoding applications, such as rotary and linear encoders
used for motion control, robotics, brushless DC motor
commutation, power tools etc.
iC-LSHC features 12 monolithically integrated photosensors with active areas of 800 µm x 330 µm each.
A high transimpedance gain of typically 4 MΩ generates output signals of a few hundret Millivolts already
from illumination levels of 0.3 to 0.7 mW/cm2 . In most
cases no additional measures must be considered to
filter for noise and interferences.
Sine/cosine encoders are the typical application for
iC-LSHC. Its 3-track scanning features a set of 4 pho-
tosensors each per track, generating positive and
negative going sine signals, as well as positive and
negative going cosine signals. An excellent matching
and common mode behavior of the differential signal
paths is obtained by a paired amplifier design, reducing the needs for external signal calibration to an
absolute minimum.
The spectral sensitivity range includes visible to near
infrared light, with the maximum sensitivity being
close to a wavelength of 680 nm. When using iCLSHC for encoder applications with typical disc and
mask codes, a signal amplitude of approximately 1 V
is typical under low light conditions, for instance when
iC-LSHC is illuminated at only 1.5 mW/cm2 by an
740 nm LED.
PACKAGES
PAD LAYOUT (2.88 mm x 3.37 mm)
PAD FUNCTIONS
No. Name Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
VCC
VREF
PS_N
NS_N
PS_M
NS_M
PS_S
NS_S
NC_S
PC_S
NC_M
PC_M
NC_N
PC_N
GND
+4.5..5.5 V Supply Voltage
Reference Voltage Output
N-Track Sine +
N-Track Sine M-Track Sine +
M-Track Sine S-Track Sine +
S-Track Sine S-Track Cosine S-Track Cosine +
M-Track Cosine M-Track Cosine +
N-Track Cosine N-Track Cosine +
Ground
Notes: All outputs supply analog voltages.
Dimension G4 is the reference radius of
the chip center.
preliminary
iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 3/7
PIN CONFIGURATION
oBGA LSH2C (6.2 mm x 5.2 mm)
PIN FUNCTIONS
No. Name Function
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
VCC
VREF
GND
PS_N
NS_N
NC_N
PC_N
PS_M
NS_M
NC_M
PC_M
PS_S
NS_S
NC_S
PC_S
+4.5..5.5 V Supply Voltage
Reference Voltage Output
Ground
N-Track Sine +
N-Track Sine N-Track Cosine N-Track Cosine +
M-Track Sine +
M-Track Sine M-Track Cosine M-Track Cosine +
S-Track Sine +
S-Track Sine S-Track Cosine S-Track Cosine +
preliminary
iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 4/7
ABSOLUTE MAXIMUM RATINGS
These ratings do not imply operating conditions; functional operation is not guaranteed. Beyond these ratings device damage may occur.
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Max.
G001 VCC
Voltage at VCC
-0.3
6
V
G002 I(VCC)
Current in VCC
-20
20
mA
G003 V()
Pin Voltage, all signal outputs
-0.3
VCC +
0.3
V
G004 I()
Pin Current, all signal outputs
-20
20
mA
G005 Vd()
ESD Susceptibility, all pins
2
kV
G006 Tj
Junction Temperature
-40
150
°C
G007 Ts
Chip Storage Temperature Range
-40
150
°C
HBM, 100 pF discharged through 1.5 kΩ
THERMAL DATA
Item
No.
T01
T02
T03
Symbol
Parameter
Conditions
Unit
Min.
Ta
Ts
Tpk
Typ.
Max.
Operating Ambient Temperature Range package oBGA LSH2C
(extended temperature range on request)
-20
90
°C
Storage Temperature Range
package oBGA LSH2C
-40
110
°C
Soldering Peak Temperature
package oBGA LSH2C
245
230
°C
°C
tpk < 20 s, convection reflow
tpk < 20 s, vapor phase soldering
TOL (time on label) 8 h;
Please refer to customer information file No. 7
for details.
All voltages are referenced to ground unless otherwise stated.
All currents flowing into the device pins are positive; all currents flowing out of the device pins are negative.
preliminary
iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 5/7
ELECTRICAL CHARACTERISTICS
Operating conditions: VCC = 4.5...5.5 V, Tj = -40..125 °C, unless otherwise stated
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Typ.
Max.
Total Device
001
VCC
Permissible Supply Voltage
002
I(VCC)
Supply Current in VCC
no output load, photocurrents within linear operating range (no override)
4.5
003
Vc()hi
Clamp-Voltage hi at all pins
I() = 4 mA
004
Vc()lo
Clamp-Voltage lo at all pins
I() = -4 mA
-1.2
Se(λ ar) = 0.25 x S(λ )max
400
9.5
5.5
V
15
mA
11
V
-0.3
V
950
nm
Photosensors
101
λ ar
Spectral Application Range
102
λ pk
Peak Sensitivity Wavelength
103
Aph()
Radiant Sensitive Area
0.8 mm x 0.33 mm
104
S(λ )
Spectral Sensitivity
105
S(λ pk)max Maximum Spectral Sensitivity
106
E()mxr
λ LED = 740 nm, Vout() not yet saturated
Irradiance For Maximum Signal
Level
680
nm
0.264
mm2
λ LED = 740 nm
0.5
A/W
λ LED = λ pk
0.55
A/W
0.15
0.5
0.8
mW/
cm2
280
nA
1.2
2.0
V/µW
4.0
5.46
Photocurrent Amplifiers
201
Iph()
Permissible Photocurrent
Operating Range
0
202
η()r
Photo Sensitivity
λ LED = 740 nm
(light-to-voltage conversion ratio)
0.8
203
Z()
Equivalent Transimpedance Gain Z = Vout() / Iph()
2.69
204
TCz
Temperature Coefficient of
Transimpedance Gain
209
∆Z()pn
Transimpedance Gain Matching
P vs. N path per diff. channel
-0.2
0.2
%
210
∆Vout()pn Signal Matching
no illumination, any output to any output
-35
35
mV
211
∆Vout()pn Signal Matching
no illumination, P.. output vs. corresponding N..
output
-2.5
2.5
mV
212
fc()hi
Cut-off Frequency (-3 dB)
280
kHz
213
VNoise()
RMS Output Noise
illuminated to 500 mV signal level above dark
level, 500 kHz band width
-0.12
120
180
MΩ
%/°C
0.5
mV
Signal Outputs
301
Vout()mx
Permissible Maximum Output
Voltage
illumination to E()mxr, linear gain
302
Vout()d
Dark Signal Level
no illumination, load 20 kΩ vs. +2 V
303
Vout()acmx Maximum Signal Level
Vout()acmx = Vout()mx - Vout()d
304
Isc()hi
Short-Circuit Current hi
load current to ground
305
Isc()lo
Short-Circuit Current lo
306
Ri()
Internal Output Resistance
307
ton()
Power-On Settling Time
VCC = 0 V → 5 V
2.45
2.72
3.02
V
600
770
1000
mV
1.48
1.96
2.35
V
100
420
800
µA
load current to IC
250
480
700
µA
f = 1 kHz
70
110
180
Ω
100
µs
1000
mV
+10
mV
Reference Voltage VREF
401
VREF
Reference Voltage
I(VREF) = 0...+1.6 mA
600
402
dVout()
Load Balancing
I(VREF) = 0...+1.6 mA
-10
770
403
Isc()hi
Short-Circuit Current hi
load current to ground
200
420
800
µA
404
Isc()lo
Short-Circuit Current lo
load current to IC
2
4.5
10
mA
iC-LSHC
preliminary
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 6/7
APPLICATION CIRCUITS
Figure 1: Application example of absolute encoder
iC-Haus expressly reserves the right to change its products and/or specifications. An Infoletter gives details as to any amendments and additions made to the
relevant current specifications on our internet website www.ichaus.de/infoletter; this letter is generated automatically and shall be sent to registered users by
email.
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.
preliminary
iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev B1, Page 7/7
ORDERING INFORMATION
Type
Package
iC-LSHC
optoBGA 6.2 mm x 5.2 mm
optoBGA 6.2 mm x 5.2 mm
optoBGA 6.2 mm x 5.2 mm
optoBGA 6.2 mm x 5.2 mm
optoBGA 6.2 mm x 5.2 mm
Options
Order Designation
reticle 26-256 NMS
reticle 26-1024 NMS
reticle 26-2048 NMS
reticle 42-2048 NMS
iC-LSHC chip
iC-LSHC OBGA LSH2C
iC-LSHC OBGA LSH2C-4R
iC-LSHC OBGA LSH2C-1R
iC-LSHC OBGA LSH2C-2R
iC-LSHC OBGA LSH2C-6R
Nonius Code Disc
255/256/240 PPR,
OD/ID ∅26/11.6 mm, glass
LSHC4S 26-256N
Nonius Code Disc
255/256/240 PPR,
OD/ID ∅26/7 mm, plastic
LSHC5S 26-256N
Nonius Code Disc
1023/1024/992 PPR,
OD/ID ∅26/11.6 mm, glass
LSHC1S 26-1024N
Nonius Code Disc
2047/2048/2016 PPR,
OD/ID ∅26/11.6 mm, glass
LSHC2S 26-2048N
Nonius Code Disc
2047/2048/2016 PPR,
OD/ID ∅42/18 mm, glass
LSHC6S 42-2048N
For technical support, information about prices and terms of delivery please contact:
iC-Haus GmbH
Am Kuemmerling 18
D-55294 Bodenheim
GERMANY
Tel.: +49 (61 35) 92 92-0
Fax: +49 (61 35) 92 92-192
Web: http://www.ichaus.com
E-Mail: [email protected]
Appointed local distributors: http://www.ichaus.com/sales_partners