ICHAUS LSHC5S26-256N

preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, Page 1/7
FEATURES
APPLICATIONS
♦
♦
♦
♦
♦
♦
♦ Absolute position encoders
♦
♦
♦
♦
Compact photosensor for high-resolution Nonius scanning
Phased-array design for excellent signal matching
Reduced cross talk due to moderate track pitch
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
Space saving QFN and optoBGA packages (RoHS compliant)
Low power consumption from single 4.5 to 5.5 V supply
Operational temperature range of -40 to +125 °C
Available code discs with 255/256/240 PPR
- LSHC4S 26-256N (OD/ID ∅26/11.6 mm, glass)
- LSHC5S 26-256N (OD/ID ∅26/7 mm, plastic)
PACKAGES
32-pin QFN
15-pin optoBGA
Chip
2.88 mm x 3.37 mm
BLOCK DIAGRAM
iC-PN2656
Copyright © 2008 iC-Haus
http://www.ichaus.com
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, Page 2/7
DESCRIPTION
The phased-array iC-PN2656 features 24 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
0.1 to 0.2 mW/cm2 . In most cases no additional measures must be considered to filter for noise and interferences.
Analog nonius encoders are the typical application for iC-PN2656. Its 3-track scanning features a
phased-array of 8 photosensors 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. An output voltage
of approximately 1 V is typical under low light conditions, for instance when iC-PN2656 is illuminated at
only 2 µW/mm2 by an 740 nm LED. A threefold intensity is sufficient when using iC-PN2656 for encoder
applications with typical disc and mask codes.
PACKAGES INFORMATION
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
All outputs are analog voltage outputs.
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, Page 3/7
PIN CONFIGURATION
cQFN32 (5 mm x 5 mm),
oQFN32 (5 mm x 5 mm)
PIN FUNCTIONS
No. Name Function
PIN CONFIGURATION
oBGA LSH2C (6.2 mm x 5.2 mm)
PIN FUNCTIONS
No. Name Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
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
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
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
+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-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, 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
-40
150
°C
HBM, 100 pF discharged through 1.5 kΩ
THERMAL DATA
Item
No.
T01
Symbol
Parameter
Conditions
Unit
Ta
Operating Ambient Temperature Range package cQFN32 (clear)
package oQFN32 (black)
package oBGA LSH2C
-20
-40
-40
70
110*
125
°C
°C
°C
T02
Ts
Storage Temperature Range
package cQFN32 (clear)
package oQFN32 (black)
package oBGA LSH2C
-20
-40
-40
70
110*
125
°C
°C
°C
T03
Tpk
Soldering Peak Temperature
package cQFN32 (clear)
245
°C
245*
°C
260
230
°C
°C
Min.
tpk < 10 s, convection reflow
MSL 5A (max. floor live 24 h at 30 °C and
60 % RH)
Typ.
Max.
Please refer to customer information file No. 7
for details.
Not suitable for vapour phase soldering.
T04
Tpk
Soldering Peak Temperature
package cQFN32 (black)
tpk < 10 s, convection reflow
MSL 3 (max. floor live 168 h at 30 °C and
60 % RH)
Please refer to customer information file No. 7
for details.
Not suitable for vapour phase soldering.
T05
Tpk
Soldering Peak Temperature
package oQFN32 (black)
package oBGA LSH2C
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.
*) Package qualification pending.
All voltages are referenced to ground unless otherwise stated.
All currents into the device pins are positive; all currents out of the device pins are negative.
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, 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
no load, photocurrents within op. range
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 (each sensor)
104
S(λ )
Spectral Sensitivity
105
S(λ pk)max Maximum Spectral Sensitivity
106
E()mxr
Permissible Irradiance
λ LED = 740 nm, Vout() not saturated
0.18
0.37
0.78
mW/
cm2
107
E()mxpk
Permissible Irradiance
λ LED = λ pk, Vout() not saturated
0.16
0.34
0.71
mW/
cm2
280
nA
680
nm
0.264
mm2
λ LED = 740 nm
0.5
A/W
λ LED = λ pk
0.55
A/W
Photocurrent Amplifiers
201
Iph()
Permissible Photocurrent Operating Range
0
202
η()r
Photo Sensitivity
λ LED = 740 nm
(light-to-voltage conversion ratio)
1.12
2.0
3.28
V/µW
203
Z()
Equivalent Transimpedance Gain Z = Vout() / Iph()
2.69
4.0
5.46
MΩ
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 Output Signal Matching
P vs. N path per diff. channel,
illumination to E()mxr
-6
6
mV
211
∆Vout()pn Dark Signal Matching
P vs. N path per diff. channel
-2.5
212
fc()hi
Cut-off Frequency (-3 dB)
213
VNoise()
RMS Output Noise
illuminated to 500 mV signal level above dark
level, 500 kHz band width
-0.12
220
310
%/°C
2.5
mV
465
kHz
0.5
mV
Signal Outputs
301
Vout()mx
Maximum Output Voltage
illumination to E()mxr
2.45
2.72
3.02
V
302
Vout()d
Dark Signal Level
load 20 kΩ vs. +2 V, no illumination
640
770
985
mV
303
Vout()acmx Maximum Signal Level
Vout()acmx = Vout()mx - Vout()d
1.48
1.96
2.35
V
304
Isc()hi
Short-Circuit Current hi
load current to ground
200
540
800
µA
305
Isc()lo
Short-Circuit Current lo
load current to IC
250
425
600
µA
306
Ri()
Internal Output Resistance
f = 1 kHz
70
110
180
Ω
I(VREF) = 0...-1.6 mA
640
770
985
mV
Reference Voltage VREF
401
VREF
Reference Voltage
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, Page 6/7
APPLICATION CIRCUITS
Disc
iC-PNxxxx
iC-MN
Figure 1: Application example of absolute encoder circuit.
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.
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev A4, Page 7/7
ORDERING INFORMATION
Type
Package
Options
iC-PN2656
QFN32 5 mm x 5 mm (clear)
QFN32 5 mm x 5 mm (black)
optoBGA 6.2 mm x 5.2 mm
Order Designation
iC-PN2656 chip
iC-PN2656 cQFN32
iC-PN2656 oQFN32
iC-PN2656 oBGA LSH2C
Encoder discs
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
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.de/support_distributors.php