ICHAUS IC-PN2656_10

preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev B2, Page 1/7
FEATURES
APPLICATIONS
♦ Compact photosensor for high-resolution nonius scanning
♦ Phased-array design for 255/256/240 PPR (N/M/S channel)
with 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 optoQFN and optoBGA packages
(RoHS compliant)
♦ Low power consumption from single 4.5 to 5.5 V supply
♦ Operational temperature range of -40 to +110 °C
♦ Suitable code discs:
LSHC4S 26-256N (glass 1 mm)
OD ∅ 26 mm, ID ∅ 11.6 mm, optical radius 10.905 mm
LSHC5S 26-256N (plastic 1.15 mm),
OD ∅ 26 mm, ID ∅ 7 mm, optical radius 10.905 mm
♦ Absolute position encoders
PACKAGES
15-pin optoBGA
6.2 mm x 5.2 mm x 1.7 mm
32-pin optoQFN
5 mm x 5 mm x 0.9 mm
BLOCK DIAGRAM
iC-PN2656
Copyright © 2010 iC-Haus
http://www.ichaus.com
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev B2, Page 2/7
DESCRIPTION
The optical encoder iC-PN2656 features 24 monolithically integrated photosensors arranged as a
phased-array. The high transimpedance gain of typically 4 MΩ generates output signals of a few hundred millivolts already from illumination levels of 1 to
2 mW/cm2 . In most cases no additional measures
must be considered to filter for noise and interferences.
Analog nonius-scale 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 1.3 mW/cm2 by an 740 nm LED.
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 B2, Page 3/7
PIN CONFIGURATION
oBGA LSH2C (6.2 mm x 5.2 mm)
1
2
3
PIN FUNCTIONS
No. Name Function
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
4
A
B
C
D
+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 +
PIN FUNCTIONS
No. Name Function
PIN CONFIGURATION
oQFN32-5x5 (5 mm x 5 mm)
32 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
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
9 10 11 12 13 14 15 16
Package qualification optoQFN32-5x5 pending.
1
2
3
4
5
6
7
8
17
18
19
20
21
22
24
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
BP
Backside pad (oQFN32-5x5 only):
not intended as an electrical connection
point; when using as shield a single link
to GND is permissible.
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev B2, 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
Min.
Ta
Operating Ambient Temperature Range package oBGA LSH2C
package oQFN32-5x5*
T02
Ts
Storage Temperature Range
package oBGA LSH2C,
package oQFN32-5x5*
T03
Tpk
Soldering Peak Temperature
package oBGA LSH2C
Typ.
Max.
-40
-40
110
110
°C
°C
-40
110
°C
245
230
°C
°C
245
230
°C
°C
(extended temperature range on request)
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.
T04
Tpk
Soldering Peak Temperature
package oQFN32-5x5*
tpk < 20 s, convection reflow
tpk < 20 s, vapor phase soldering
MSL 5A (max. floor live 24 h at 30 °C and
60 % RH);
Please refer to customer information file No. 7
for details.
*) Package qualification pending.
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-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev B2, 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 load, photocurrents within linear op. 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(λar) = 0.25 x S(λ)max
400
9.5
5.5
V
15
mA
11
V
-0.3
V
950
nm
Photosensors
101
λar
Spectral Application Range
102
λpk
Peak Sensitivity Wavelength
680
nm
103
Aph()
Radiant Sensitive Area
0.11
mm2
104
S(λ)
Spectral Sensitivity
λLED = 740 nm
0.5
A/W
105
S(λpk)max Maximum Spectral Sensitivity
λLED = λpk
0.55
A/W
106
E()mxr
λLED = 740 nm, Vout() not saturated
Irradiance For Maximum Signal
Level
0.7
1.3
2.1
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
λLED = 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.. channel vs. corresponding N.. channel
-0.2
0.2
%
210
∆Vout()pn Signal Matching
no illumination, any output vs. 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
preliminary
iC-PN2656
PHASED ARRAY NONIUS ENCODER 26-256
Rev B2, Page 6/7
APPLICATION CIRCUITS
Disc
iC-PNxxxx
iC-MN
Figure 1: Application example of absolute encoder circuit.
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Copying – even as an excerpt – is only permitted with iC-Haus’ approval in writing and precise reference to source.
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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.
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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 B2, Page 7/7
ORDERING INFORMATION
Type
Package
Options
Order Designation
iC-PN2656
-
iC-PN2656 chip
15-pin optoBGA,
6.2 mm x 5.2 mm,
thickness 1.7 mm
iC-PN2656 oBGA LSH2C
32-pin optoQFN,
5 mm x 5 mm,
thickness 0.9 mm
iC-PN2656 oQFN32-5x5
Suitable code discs
255/256/240 PPR
LSHC4S 26-256N
OD ∅ 26 mm, ID ∅ 11.6 mm,
optical radius 10.905 mm
(glass 1 mm)
255/256/240 PPR
LSHC5S 26-256N
OD ∅ 26 mm, ID ∅ 7 mm, optical radius 10.905 mm
(plastic 1.15 mm)
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