ICHAUS IC

preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 1/11
FEATURES
APPLICATIONS
♦
♦
♦
♦
♦
♦ Incremental encoder
♦ Brushless DC motor
commutation
♦ Industrial drives
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
Monolithic photodiode array with excellent signal matching
Very compact size for small encoders
Moderate track pitch for relaxed assembly tolerances
Low noise signal amplifiers with high EMI tolerance
Single-pin programming of 3 operating modes:
analog, digital (1000 CPR), and x2 interpolated (2000 CPR)
Analog signals for alignment and resolution enhancement
Selectable index gating: 1 T, 0.5 T (B-gated), 0.25 T (AB-gated)
Complementary outputs: A, B, Z and NA, NB, NZ
Up to 50,000 RPM at 1000 CPR (25,000 RPM at 2000 CPR)
U, V, W commutation signals, analog and digital
All outputs +/- 4 mA push-pull, current-limited and
short-circuit-proof
LED power control with 40 mA high-side driver
Single 3.5 V to 5.5 V operation, low power consumption
Operating temperature range of -40 °C to +110 °C (+120 °C)
Code disc available: PT15S 26-1000 (glass 1 mm)
OD ∅26.0 mm, ID ∅11.6 mm, optical radius 11.0 mm,
1000 ppr and 4 ppr commutation (90°)
PACKAGES
optoQFN32-5x5
5 mm x 5 mm x 0.9 mm
BLOCK DIAGRAM
+3.5..5.5V
C1
1μF
iC-PT
TIP
TIN
SEL
PA
NA
PB
NB
LED
POWER
CONTROL
SIGNAL
COMPARATION
AND
QUADRATURE
OUTPUT
LED
PA
NA
PB
D1
R1
47
NB
PZ
PZ
NZ
VCC
NZ
INDEX
OUTPUT
T1
POWER-ON RESET
U
U
+
V
V
W
COMMUTATION
CA
W
GND
Copyright © 2011, 2013 iC-Haus
http://www.ichaus.com
iC-PT 2610
preliminary
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 2/11
DESCRIPTION
iC-PT 2610 is an optical sensor IC with integrated
photosensors whose signals are converted into voltages by low-noise transimpedance amplifiers. Precise voltage comparators with hysteresis are used to
generate the digital signals, supplied to the output
pins via differential +/- 4 mA push-pull drivers.
The built-in LED power control with its 40 mA driver
stage permits a direct connection of the encoder
LED. Regardless of aging or changes in temperature
the received optical power is kept constant.
Selection input SEL chooses for three different operating modes: regular A/B operation, A/B operation
with 2-fold interpolation, or analog operation. With
analog operation the amplified signal voltages are
available at the outputs for inspection and monitoring
encoder assembly.
Typical applications of iC-PT devices are incremental
encoders for motor feedback and commutation. To
this end, device version iC-PT 2610 provides differential A/B tracks and a differential index track, each
consisting of multiple photo sensors. The layout of
the signal amplifiers is such that there is an excellent
paired channel matching, eliminating the needs for
signal calibration in most cases.
Additionally, three more tracks are provided to generate motor commutation information for the U, V and
W outputs, for instance with 90 degree phase shift to
operate 4-phase brushless motors (period count and
phase shift can be varied by the code disc applied).
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 3/11
PACKAGING INFORMATION
PAD LAYOUT
Chip size 2.88 mm x 3.37 mm
PAD FUNCTIONS
No. Name Function
See pin configuration.
PIN CONFIGURATION
oQFN32-5x5, oQFN32-5x5-3 (5 mm x 5 mm)
1 VCC
2 LED
32 31 30 29 28 27 26 25
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
9 10 11 12 13 14 15 16
PIN FUNCTIONS
No.
Name Function
3
4
5
6
7
8
9..16
17
18
19
20
21
22
23
PA
NA
PB
NB
PZ
NZ
n.c.2)
SEL
W
TIN
V
TIP
U
T1
24 GND
25..32 n.c.
BP
+3.5..5.5 V Supply Voltage
LED Controller, High-Side Current
Source Output
Push-Pull Output A+ / Analog Sin+ 1)
Push-Pull Output A- / Analog SinPush-Pull Output B+ / Analog Cos+
Push-Pull Output B- / Analog CosPush-Pull Output Z+ / Analog Z+
Push-Pull Output Z- / Analog ZOp. Mode Selection Input:
lo = digital
hi = x2 interpolated
open = analog (alignment aid)
Push-Pull Output W / Analog W
Negative Test Current Input 3)
Push-Pull Output V / Analog V
Positive Test Current Input 3)
Push-Pull Output U / Analog U
Index Length Selection Input:
lo = 0.5 T (B-gated),
hi = 1 T (ungated/T-gated),
open = 0.25 T (A and B-gated)
Ground
Backside Paddle 4)
1) Capacitive pin loads must be avoided when using the analog output signals.
2) Pin numbers marked n.c. are not in use.
3) The test pins TIP and TIN may remain unconnected.
4) The backside paddle may have a single link to GND. A current flow across the paddle is not permissible.
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 4/11
PACKAGE DIMENSIONS
All dimensions given in mm.
Maximum molding excess +20 µm / -75 µm versus surface of glass.
Maximum package thickness tolerance +/- 0.1 mm.
RECOMMENDED PCB-FOOTPRINT
15
R0.
0.50
0.30
4.90
0.70
0.90
3.60
SIDE
BOTTOM
TOP
5
1.90
0.50
0.23
0.40
5
3.60
3.60
3.24
0.30
4.90
3.60
dra_pt33xx-oqfn32-2_pack_1, 10:1
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 5/11
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()
Voltage at Output Pins
PA, NA, PB, NB, PZ, NZ, U, V, W
-0.3
VCC +
0.3
V
G004 I()
Current in Output Pins
PA, NA, PB, NB, PZ, NZ, U, V, W
-20
20
mA
G005 V()
Voltage at LED
-0.3
VCC +
0.3
V
G006 I()
Current in LED
-120
20
mA
G007 V()
Voltage at TIP, TIN, SEL
-0.3
VCC +
0.3
V
G008 I()
Current in TIP, TIN, SEL
-20
20
mA
G009 Vd()
ESD Susceptibility, all pins
2
kV
G010 Tj
Junction Temperature
-40
150
°C
G011 Ts
Chip Storage Temperature Range
-40
150
°C
HBM, 100 pF discharged through 1.5 kΩ
THERMAL DATA
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Typ.
Max.
T01
Ta
Operating Ambient Temperature Range
(extended range on request)
-40
110
°C
T02
Ts
Permissible Storage Temperature
Range
-40
110
°C
T03
Tpk
Soldering Peak Temperature
245
230
°C
°C
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.
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-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 6/11
ELECTRICAL CHARACTERISTICS
Operating conditions: VCC = 3.5...5.5 V, Tj = -40...125 °C, λLED = λr = 740 nm, unless otherwise noted
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 op. range
3.5
5.5
V
10
mA
003
Vc()lo
Clamp-Voltage lo at all pins
I() = -4 mA, versus GND
-1.2
-0.3
V
004
Vc()hi
Clamp-Voltage hi at all pins
I() = 4 mA
005
Vc()hi
11
V
Clamp-Voltage hi at LED, PA, NA, I() = 4 mA, versus VCC
PB, NB, PZ, NZ, U, V, W
0.3
1.2
V
006
Vc()hi
Clamp-Voltage hi at SEL, TIP,
TIN
I() = 4 mA, versus VCC
0.7
2.2
V
Se(λar) = 0.25 x S(λ)max
400
950
nm
3
Photosensors
101
λar
Spectral Application Range
102
103
λpk
Peak Sensitivity Wavelength
Aph()
Radiant Sensitive Area
PA, PB, NA, NB (sum of segments)
U, V, W (per segment)
PZ, NZ (sum of segments)
104
S(λr)
Spectral Sensitivity
106
E()mxpk
Permissible Irradiance
680
nm
0.069
0.084
0.058
mm2
mm2
mm2
λLED = 740 nm
λLED = 850 nm
0.5
0.3
A/W
A/W
λLED = λpk, Vout() < Vout()mx;
PA, PB, NA, NB
2.3
U, V, W
1.3
PZ, NZ
2.1
mW/
cm2
mW/
cm2
mW/
cm2
Photocurrent Amplifiers
201
Iph()
Permissible Photocurrent
Operating Range
0
202
η()r
Photo Sensitivity
for PA, PB, NA, NB
(light-to-voltage conversion ratio) for PZ, NZ, U, V, W
0.1
0.2
203
Z()
Equivalent Transimpedance Gain Z = Vout() / Iph(), Tj = 27 °C;
for PA, PB, NA, NB
for PZ, NZ, U, V, W
0.56
0.66
550
nA
0.3
0.4
0.5
0.6
V/µW
V/µW
0.75
1.0
1
1.36
MΩ
MΩ
204
TCz
Temperature Coefficient of
Transimpedance Gain
-0.12
205
∆Z()pn
Transimpedance Gain Matching
SEL open, P vs. N path per diff. channel
-0.2
0.2
%
206
∆Vout()
Dark Signal Matching of A, B
SEL open, output vs. output
-8
8
mV
207
∆Vout()
Dark Signal Matching of U, V, W
SEL open, output vs. output
-12
12
mV
208
∆Vout()
Dark Signal Matching
of A, B, Z, U, V, W
SEL open, any output vs. any output
-24
24
mV
209
∆Vout()pn Dark Signal Matching
SEL open, P vs. N path per diff. channel
-2.5
211
fc()hi
Cut-off Frequency (-3 dB)
%/°C
2.5
400
500
mV
kHz
Analog Outputs PA, NA, PB, NB, PZ, NZ, U, V, W
301
Vout()mx
Maximum Output Voltage
illumination to E()mxpk
1.04
1.27
1.8
V
302
Vout()d
Dark Signal Level
load 100 kΩ vs. +2 V
640
770
985
mV
303
Vout()acmx Maximum Signal Level
Vout()acmx = Vout()mx - Vout()d
0.3
0.5
0.75
V
304
Isc()hi
Short-Circuit Current hi
SEL open, load current to ground
100
1800
3000
µA
305
Isc()lo
Short-Circuit Current lo
SEL open, load current to IC
20
40
200
µA
306
Ri()
Internal Output Resistance
f = 1 kHz
250
750
2250
Ω
Upper Comparator Threshold
Iph()p x Z()p > Iph()n x Z()n,
resp. Iph()p x Z()p > internal VREF
5
12
25
mV
Comparators
401 Vt()hi
402
Vt()lo
Lower Comparator Threshold
Iph()p x Z()p < Iph()n x Z()n,
resp. Iph()p x Z()p < internal VREF
-25
-12
-5
mV
403
Vt()hys
Comparator Hysteresis
Vt()hys = Vt()hi - Vt()lo
10
24
50
mV
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 7/11
ELECTRICAL CHARACTERISTICS
Operating conditions: VCC = 3.5...5.5 V, Tj = -40...125 °C, λLED = λr = 740 nm, unless otherwise noted
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Typ.
Max.
LED Power Control
501
Iop()
Permissible LED Output Current
502
Vs()hi
Saturation Voltage hi
Vs()hi = VCC - V(LED); I() = -40 mA
0.25
-40
503
Isc()hi
Short-Circuit Current hi
V() = 0 V
-150
0
0.5
mA
1
V
-50
mA
Digital Outputs PA, NA, PB, NB, PZ, NZ, U, V, W
601
fout
Maximum Output Frequency
602
Vs()lo
Saturation Voltage lo
VCC = 4.5...5.5 V, I() = 4mA, Tj = 70 °C
0.4
V
603
Vs()lo
Saturation Voltage lo
VCC = 4.5...5.5 V, I() = 4mA, Tj = 85 °C
0.5
V
604
Vs()lo
Saturation Voltage lo
VCC = 3.5...4.5 V, I() = 4mA
0.6
V
605
606
Isc()lo
Short-Circuit Current lo
V() = VCC
70
mA
Vs()hi
Saturation Voltage hi
Vs()hi = VCC - V(), I() = -4 mA;
VCC = 4.5...5.5 V
VCC = 3.5...4.5 V
0.4
0.6
V
V
-7
mA
607
Isc()hi
Short-Circuit Current hi
800
kHz
7
V() = 0 V
-70
Selection Input SEL
701
Vt1()hi
Upper Threshold Voltage hi
for A/B mode with x2 interpolation
78
80
82
%VCC
702
Vt1()lo
Upper Threshold Voltage lo
for A/B mode with x2 interpolation
68
70
72
%VCC
703
Vt1()hys
Upper Threshold Hysteresis
Vt1()hys = Vt1()hi - Vt1()lo
8
10
12
%VCC
704
Vt2()hi
Lower Threshold Voltage hi
for A/B mode
28
30
32
%VCC
705
Vt2()lo
Lower Threshold Voltage lo
for A/B mode
18
20
22
%VCC
706
Vt2()hys
Lower Threshold Hysteresis
Vt2()hys = Vt2()hi - Vt2()lo
8
10
12
%VCC
707
V0()
Pin-Open Voltage
for analog mode
45
50
55
%VCC
708
Rpd()
Pull-Down Resistor
SEL to GND, V(SEL) = VCC
70
100
140
kΩ
709
Rpu()
Pull-Up Resistor
VCC to SEL, V(SEL) = 0 V
70
100
140
kΩ
710
Vpd()
Pull-Down Voltage vs. VCC/2
Vpd() = V() - VCC/2; I() = 0...5 µA
0.5
V
711
Vpu()
Pull-Up Voltage vs. VCC/2
Vpu() = V() - VCC/2; I() = -5...0 µA
-0.5
V
Test Circuit Inputs TIP, TIN
801
I()test
Permissible Test Current Range
test mode active
802
V()test
Test Pin Voltage
test mode active, I() = 200 µA
803
Ipd()
Test Pin Pull-Down Current
804
Ipd()
Test Pin Pull-Down Current
805
It()on
Test Mode Activation Threshold
806
CR()
Test Mode Current Ratio I()/Iph() test mode active, I() = 200 µA
10
600
µA
1.25
1.5
1.75
V
test mode not active, V() = 0.4 V
60
100
160
µA
V() = VCC
0.7
2
3
mA
80
130
190
µA
1500
3000
5000
2.6
3.45
Power-On-Reset Circuit
901
VCCon
Turn-on Threshold VCC
(power-on release)
increasing voltage at VCC
V
902
VCCoff
Turn-off Threshold VCC
(power-down reset)
decreasing voltage at VCC
1.4
2.4
903
VCChys
Threshold Hysteresis
VCChys = VCCon - VCCoff
50
170
300
mV
V
Index Length Selection Input T1
A01
Vt1()hi
Upper Threshold Voltage hi
for index length 1 T
78
80
82
%VCC
A02
Vt1()lo
Upper Threshold Voltage lo
for index length 1 T
68
70
72
%VCC
A03
Vt1()hys
Upper Threshold Hysteresis
Vt1()hys = Vt1()hi - Vt1()lo
8
10
12
%VCC
A04
Vt2()hi
Lower Threshold Voltage hi
for index length 0.5 T (B-gated)
28
30
32
%VCC
A05
Vt2()lo
Lower Threshold Voltage lo
for index length 0.5 T (B-gated)
18
20
22
%VCC
A06
Vt2()hys
Lower Threshold Hysteresis
Vt2()hys = Vt2()hi - Vt2()lo
8
10
12
%VCC
A07
V0()
Pin-Open Voltage
for index length 0.25 T (AB-gated)
45
50
55
%VCC
A08
Rpd()
Pull-Down Resistor
T1 to GND, V(T1) = VCC
70
100
140
kΩ
A09
Rpu()
Pull-Up Resistor
VCC to T1, V(T1) = 0 V
70
100
140
kΩ
A10
Vpd()
Pull-Down Voltage vs. VCC/2
Vpd() = V() - VCC/2; I() = 0...5 µA
0.5
V
A11
Vpu()
Pull-Up Voltage vs. VCC/2
Vpu() = V() - VCC/2; I() = -5...0 µA
-0.5
V
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 8/11
DIGITAL OUTPUT SIGNALS
T
iC-PT2610’s phased array design determines the optical radius (11.0 mm) and the cycles per revolution for
the A and B encoder quadrature signals (1000 CPR
native, respectively 2000 CPR interpolated).
PA
PB
AB-gated
PZ
B-gated
T/4
T/4
T/4
ungated
The pulse count, period length and phase shift for the
U, V, W commutation signals is determined by the code
disc.
T/4
ö
C
U
Sampling is supported by code disc PT15S 26-1000
providing 4 CPR each for U/V/W, with a period length
of 90 degrees (C).
V
W
C/6
C/6
C/6
C/6
C/6
C/6
Figure 1: Encoder quadrature signals and motor
commutation signals.
A phase shift of 0 degrees (ϕ) between U and Z edges
must be considered during alignment. Ideally, the rising edge of U meets the index Z.
For detailed specifications, refer to the relevant code
disc datasheet, available separately.
ANALOG OUTPUT SIGNALS
GND
CA
T1
GND
CA
T1
PA
PA
PB
PB
PZ
PZ
VCC
VCC
iC-PTxxxx
iC-PTxxxx
U
SEL
Figure 2: Analog signal output (pin SEL open).
When the operating mode selection input SEL is left
open, all digital outputs are disabled and analog output signals are available for test and alignment.
If analog signals are desired permanently, noise immunity can be improved by wiring pin SEL to an external
VCC/2 reference.
U
SEL
Figure 3: Analog/digital signal output for
oQFN32-5x5-3 (pin SEL open).
The analog output signals may be used to higher the
encoder’s resolution by an external interpolation IC.
In this case, using package oQFN32-5x5-3 may be
considered to obtain analog signals at PA/PB/PZ and
NA/NB/NZ outputs connecting the interpolation IC, together with digital signals at U/V/W connecting a line
driver.
Special attention to the PCB layout should be paid to
avoid cross talk; analog and digital lines should be separated carefully.
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 9/11
INDEX GATING
VCC
T
GND
CA
T1
PA
PB
PZ
T/4
iC-PTxxxx
T/4
T/4
T/4
SEL
Figure 4: Ungated index signal (T1 = high) at x1 interpolation (SEL = low).
VCC
T
GND
CA
T1
PA
PB
PZ
VCC
iC-PTxxxx
T/4 T/4 T/4 T/4
SEL
Figure 5: T-gated index signal (T1 = high) at x2 interpolation (SEL = high).
T
GND
CA
T1
PA
PB
PZ
T/4
iC-PTxxxx
T/4
T/4
T/4
SEL
Figure 6: B-gated index signal (T1 = low) at x1 interpolation (SEL = low).
T
GND
CA
T1
PA
PB
PZ
VCC
iC-PTxxxx
T/4 T/4 T/4 T/4
SEL
Figure 7: B-gated index signal (T1 = low) at x2 interpolation (SEL = high).
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 10/11
T
GND
CA
T1
pin open
PA
PB
PZ
T/4
iC-PTxxxx
T/4
T/4
T/4
SEL
Figure 8: AB-gated index signal (T1 = open or VCC/2) at x1 interpolation (SEL = low).
T
GND
CA
T1
pin open
PA
PB
PZ
VCC
iC-PTxxxx
T/4 T/4 T/4 T/4
SEL
Figure 9: AB-gated index signal (T1 = open or VCC/2) at x2 interpolation (SEL = high).
APPLICATION NOTES
Application notes for iC-PTxx series ICs are available separately.
DESIGN REVIEW: Notes On Chip Functions
iC-PT2610 Z
No.
Function, Parameter/Code
Description and Application Hints
none at time of printing
Table 4: Chip release iC-PT2610_Z
iC-Haus expressly reserves the right to change its products and/or specifications. An info letter 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 and does not assume liability for any errors or omissions in these
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.
preliminary
iC-PT 2610
6-CH. PHASED ARRAY OPTO ENCODER (26-1000)
Rev B3, Page 11/11
ORDERING INFORMATION
Type
Package
iC-PT2610
32-pin optoQFN, glass lid,
5 mm x 5 mm,
0.9 mm thickness
Code Disc
Options
Order Designation
iC-PT2610 oQFN32-5x5
digital UVW output
(pad CA bonded to GND)
iC-PT2610 oQFN32-5x5-3
1000 PPR +4 PPR,
OD/ID ∅26.0/11.6 mm,
glass 1 mm
PT15S 26-1000
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