IC-LTA [ICHAUS]
6-CH. INCREMENTAL OPTO ENCODER ARRAY; 6 - CH 。增量式光电编码器阵列
| 型号： | IC-LTA |
| 厂家： | 
IC-HAUS GMBH |
| 描述： | 6-CH. INCREMENTAL OPTO ENCODER ARRAY |
| 文件： | 总14页 (文件大小：779K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 1/14
FEATURES
APPLICATIONS
♦ 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, and x2 interpolation
♦ Incremental encoder
♦ Brushless motor commutation
♦ A-AND-B gated Z index signal
♦ Complementary outputs: A, B, Z and NA, NB, NZ
♦ U, V, W commutation signals (digital/analog)
♦ All outputs +/- 4 mA push-pull, current-limited and
short-circuit-proof
PACKAGES
♦ 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 to +85 °C
(optional -40 to +120 °C)
32-pin optoQFN
5 mm x 5 mm x 0.9 mm
♦ Space saving optoQFN and optoBGA packages
(RoHS compliant)
♦ Custom made code discs on request
15-pin optoBGA
6.2 mm x 5.2 mm x 1.7 mm
BLOCK DIAGRAM
+3.5..5.5V
C1
1μF
TIP TIN SEL
VCC
LED
LED
iC-LTA
POWER
CONTROL
PA
PA
D1
SIGNAL
NA
NA
R1
COMPARATION
AND
47
PB
NB
PB
QUADRATURE
NB
OUTPUT
PZ
NZ
PZ
INDEX
NZ
OUTPUT
POWER-ON RESET
U
V
U
V
-
+
W
W
COMMUTATION
GND
Copyright © 2011 iC-Haus
http://www.ichaus.com
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 2/14
DESCRIPTION
iC-LTA is a versatile optical sensor IC with integrated available at the outputs for inspection and monitoring
photosensors whose signals are converted into volt- encoder assembly.
ages by low-noise transimpedance amplifiers. Pre-
cise voltage comparators with hysteresis are used to The typical application of iC-LTA are incremental en-
generate the digital signals, supplied to the output coders for motor feedback and commutation. To this
pins via differential +/- 4 mA push-pull drivers.
end, iC-LTA provides a differential scanning for A/B
and the index track Z. The layout of the signal ampli-
The built-in LED power control with its 40 mA driver fiers is such that there is an excellent paired channel
stage permits a direct connection of the encoder matching, eliminating the needs for signal calibration
LED. Regardless of aging or changes in temperature in most cases.
the received optical power is kept constant. An inter-
nal resistor presets the photocurrent operating point Additionally, three more tracks are provided to gener-
and thus the desired illumination level.
ate motor commutation information for the U, V and
W outputs, for instance with 120 degree phase shift
Selection input SEL chooses for three different op- to operate 3-phase brushless motors (period count
erating modes: regular A/B operation, A/B operation and phase shift can be varied by the code disc ap-
with 2-fold interpolation, or analog operation. With plied).
analog operation the amplified signal voltages are
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 3/14
PACKAGES
PAD LAYOUT
PAD FUNCTIONS
Chip size 2.88 mm x 3.37 mm
No. Name Function
See pin configuration.
MAX. WINDOW 1.900x3.120
1.156x0.228
OUTSIDE TRACK "RA"
1.108x0.238
1.064x0.248
0.4349
0.4401
0.800x0.330 (4x)
1.720x0.1503 (2x)
0.5050
0.4500
0.4799
0.3797
0.9200
2.8800
(*): VS. CENTER OF CHIP
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 4/14
PIN CONFIGURATION
PIN FUNCTIONS
oBGA LSH2C (6.2 mm x 5.2 mm)
No. Name Function
A2 VCC +3.5..5.5 V Supply Voltage
A3 LED LED Controller, High-Side Current
Source Output
1
2
3
4
A4 GND Ground
A
B
C
B1 PA
B2 NA
B3 TIP
B4 U
C1 PB
C2 NB
C3 TIN
C4 V
Push-Pull Output A+ (Sin+)
Push-Pull Output A- (Sin-)
Positive Test Current Input
Push-Pull Output U
Push-Pull Output B+ (Cos+)
Push-Pull Output B- (Cos-)
Negative Test Current Input
Push-Pull Output V
D1 PZ
D2 NZ
Push-Pull Output Z+ (Index+)
Push-Pull Output Z- (Index-)
D
D3 SEL Op. Mode Selection Input:
lo = digital,
hi = x2 interpolated
open = analog (alignment)
D4 W
Push-Pull Output W
For dimensional specifications refer to the relevant package data sheet, available separately.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 5/14
PIN CONFIGURATION
oQFN32-5x5 (5 mm x 5 mm)
PIN FUNCTIONS
No. Name Function
1 VCC +3.5..5.5 V Supply Voltage
2 LED LED Controller, High-Side Current
Source Output
32 31 30 29 28 27 26 25
3 PA
4 NA
5 PB
6 NB
7 PZ
8 NZ
Push-Pull Output A+ (Sin+)
Push-Pull Output A- (Sin-)
Push-Pull Output B+ (Cos+)
Push-Pull Output B- (Cos-)
Push-Pull Output Z+ (Index+)
Push-Pull Output Z- (Index-)
1
24
23
22
21
20
19
18
17
2
3
4
5
6
7
8
9..16 n.c.
17 SEL Op. Mode Selection Input:
lo = digital,
hi = x2 interpolated
open = analog (alignment)
Push-Pull Output W
Negative Test Current Input
Push-Pull Output V
18 W
19 TIN
20 V
21 TIP
22 U
Positive Test Current Input
Push-Pull Output U
23 n.c.
24 GND Ground
25..32 n.c.
BP
Backside Paddle
Pin numbers marked n.c. are not in use. The backside paddle is not intended as an electrical connection point;
when used as shield a single link to GND is permissible. The test pins TIP and TIN may remain unconnected.
Capacitive pin loads must be avoided when using the analog test signals for alignment purposes.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 6/14
PACKAGE DIMENSIONS oQFN32-5x5
RECOMMENDED PCB-FOOTPRINT
4.90
3.60
SIDE
0.50
0.30
TOP
5
BOTTOM
3.60
1.90
0.50
0.23
dra_lta-oqfn32-2_pack_1, 10:1
Maximum molding excess +20 µm / -200 µm versus surface of glass.
All dimensions given in mm.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 7/14
ABSOLUTE MAXIMUM RATINGS
These ratings do not imply operating conditions; functional operation is not guaranteed. Beyond these ratings device damage may occur.
Item Symbol
No.
Parameter
Conditions
Unit
Min.
-0.3
-20
Max.
6
G001 VCC
G002 I(VCC)
G003 V()
Voltage at VCC
Current in VCC
V
mA
V
20
Voltage at Output Pins
PA, NA, PB, NB, PZ, NZ, U, V, W#
-0.3
VCC +
0.3
G004 I()
G005 V()
Current in Output Pins
PA, NA, PB, NB, PZ, NZ, U, V, W#
-20
20
mA
V
Voltage at LED
-0.3
VCC +
0.3
G006 I()
G007 V()
Current in LED
-120
-0.3
20
mA
V
Voltage at TIP, TIN, SEL
VCC +
0.3
G008 I()
G009 Vd()
G010 Tj
G011 Ts
Current in TIP, TIN, SEL
ESD Susceptibility at all pins
Junction Temperature
-20
20
2
mA
kV
°C
°C
HBM, 100 pF discharged through 1.5 kΩ
-40
-40
150
150
Chip Storage Temperature
THERMAL DATA
Item Symbol
No.
Parameter
Conditions
Unit
°C
Min. Typ. Max.
T01 Ta
T02 Ts
T03 Tpk
Operating Ambient Temperature Range
(extended range on request)
-40
85
Permissible Storage Temperature
Range
-40
85
°C
Soldering Peak Temperature
tpk < 20 s, convection reflow
tpk < 20 s, vapor phase soldering
245
230
°C
°C
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.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 8/14
ELECTRICAL CHARACTERISTICS
VCC = 3.5...5.5 V, Tj = -40...125 °C, λLED = λr = 740 nm, unless otherwise noted
Item Symbol
No.
Parameter
Conditions
Unit
Min.
Typ.
Max.
Total Device
001 VCC
Permissible Supply Voltage
Supply Current in VCC
3.5
5.5
10
V
002 I(VCC)
no load, photocurrents within linear op. range
(no override)
3
mA
003 Vc()lo
004 Vc()hi
005 Vc()hi
Clamp-Voltage lo at all pins
Clamp-Voltage hi at all pins
I() = -4 mA versus GND
I() = 4 mA
-1.2
-0.3
11
V
V
V
Clamp-Voltage hi at LED, PA, NA, I() = 4 mA, versus VCC
PB, NB, PZ, NZ, U, V, W
0.3
0.7
1.2
006 Vc()hi
Clamp-Voltage hi at
SEL, TIP, TIN
I() = 4 mA, versus VCC
2.2
V
Photosensors
101 λar
Spectral Application Range
Peak Sensitivity Wavelength
Radiant Sensitive Area
Se(λar) = 0.25 x S(λ)max
400
950
nm
nm
mm2
mm2
mm2
102 λpk
680
103
Aph()
PA, PB, NA, NB
PZ, NZ
U, V, W
0.264
0.258
0.264
104 S(λr)
Spectral Sensitivity
λLED = 740 nm
λLED = λpk
0.5
A/W
A/W
105 S(λ)max
Max. Spectral Sensitivity
Permissible Irradiance
0.55
106
E()mxpk
λLED= λpk, Vout() < Vout()mx;
PA, PB, NA, NB
0.55
0.4
mW/
cm2
mW/
cm2
mW/
cm2
U, V, W
PZ, NZ
0.45
Photocurrent Amplifiers
201 Iph() Permissible Photocurrent
0
550
nA
Operating Range
202
203
η()r
Photo Sensitivity
(light-to-voltage conversion ratio) for PZ, NZ, U, V, W
for PA, PB, NA, NB
0.1
0.2
0.3
0.4
0.5
0.6
V/µW
V/µW
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
0.75
1.0
1
1.36
MΩ
MΩ
204 TCZ
Temperature Coefficient Of
Transimpedance Gain
-0.12
%/°C
205 ∆Z()pn
206 ∆Vout()
Transimpedance Gain Matching SEL open, P vs. N path per diff. channel
-0.2
-8
0.2
8
%
Dark Signal Matching
of A, B
SEL open, output vs. output
mV
207 ∆Vout()
208 ∆Vout()
Dark Signal Matching
of U, V, W
SEL open, output vs. output
-12
-24
-2.5
12
24
mV
mV
Dark Signal Matching
of A, B, Z, U, V, W
SEL open, any output vs. any output
SEL open, P vs. N path per diff. channel
209 ∆Vout()pn Dark Signal Matching
211 fc()hi Cut-off Frequency (-3 dB)
2.5
mV
400
kHz
Analog Test Signals PA, NA, PB, NB, PZ, NZ, U, V, W
301 Vout()mx Maximum Output Voltage
illumination to E()mxpk
Load 100 kΩ vs. +2 V
1.04
640
0.3
1.27
770
0.5
1.8
985
V
mV
V
302 Vout()d
Dark Signal Level
303 Vout()acmx Maximum Signal Level
Vout()acmx = Vout()mx - Vout()d
SEL open, load current to ground
SEL open, load current to IC
f = 1 kHz
0.75
3000
200
304 Imx()hi
305 Imx()lo
306 Ri()
Output Current Limitation hi
Output Current Limitation lo
Internal Output Resistance
100
20
1800
40
µA
µA
Ω
250
750
2250
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 9/14
ELECTRICAL CHARACTERISTICS
VCC = 3.5...5.5 V, Tj = -40...125 °C, λLED = λr = 740 nm, unless otherwise noted
Item Symbol
No.
Parameter
Conditions
Unit
Min.
Typ.
Max.
Comparators
401
Vt()hi
Upper Comparator Threshold
Lower Comparator Threshold
Comparator Hysteresis
Iph()p x Z()p > Iph()n x Z()n,
resp. Iph()p x Z()p > internal VREF
5
5
12
12
24
25
25
50
mV
mV
mV
402
Vt()lo
Iph()p x Z()p < Iph()n x Z()n,
resp. Iph()p x Z()p < internal VREF
403 Vt()hys
LED Power Control
501 Imx()
Vt()hys = Vt()hi - Vt()lo
10
Permissible LED Output Current
Saturation Voltage hi
-40
0.25
-150
0
1
mA
V
502 Vs()hi
Vs()hi = VCC - V(), I() = -40 mA
V() = 0 V
0.5
503 Isc()hi
Short-Circuit Current hi
-50
mA
Digital Output Drivers PA, NA, PB, NB, PZ, NZ, U, V, W
601 Vs()lo
602 Vs()lo
603 Vs()lo
604 Isc()lo
605 Vs()hi
606 Vs()hi
607 Isc()hi
Saturation Voltage lo
Saturation Voltage lo
Saturation Voltage lo
Short-Circuit Current lo
Saturation Voltage hi
Saturation Voltage hi
Short-Circuit Current hi
VCC = 4.5...5.5 V, I() = 4mA, Tj = 70 °C
VCC = 4.5...5.5 V, I() = 4mA, Tj = 85 °C
VCC = 3.5...4.5 V, I() = 4mA
0.4
0.5
0.6
70
V
V
V
V() = VCC
7
mA
V
Vs() = VCC - V(), VCC = 4.5...5.5 V, I() = -4 mA
Vs() = VCC - V(), VCC = 3.5...4.5 V, I() = -4 mA
V() = 0 V
0.4
0.6
-7
V
-70
mA
Selection Input SEL
701 Vt1()hi
702 Vt1()lo
703 Vt1()hys
704 Vt2()hi
705 Vt2()lo
706 Vt2()hys
707 V0()
Upper Threshold Voltage hi
for A/B mode with x2 interpolation
for A/B mode with x2 interpolation
Vt1()hys = Vt1()hi - Vt1()lo
for A/B mode
78
68
8
80
70
82
72
%VCC
%VCC
%VCC
%VCC
%VCC
%VCC
%VCC
kΩ
Upper Threshold Voltage lo
Upper Threshold Hysteresis
Lower Threshold Voltage hi
Lower Threshold Voltage lo
Lower Threshold Hysteresis
Pin-Open Voltage
10
12
28
18
8
30
32
for A/B mode
20
22
Vt2()hys = Vt2()hi - Vt2()lo
for analog mode
10
12
45
70
70
50
55
708 Rpd()
709 Rpu()
710 Vpd()
711 Vpu()
Pull-Down Resistor
SEL to GND, V(SEL) = VCC
VCC to SEL, V(SEL) = 0 V
Vpd() = V() - VCC/2; I() = 0...5 µA
Vpu() = V() - VCC/2; I() = -5...0 µA
100
100
140
140
0.5
Pull-Up Resistor
kΩ
Pull-Down Voltage vs. VCC/2
Pull-Up Voltage vs. VCC/2
V
-0.5
V
Test Circuit Inputs TIP, TIN
801 I()test
802 V()test
803 Ipd()
804 Ipd()
805 It()on
806 CR()
Permissible Test Current Range test mode active
10
1.25
60
600
1.75
160
3
µA
V
Test Pin Voltage
test mode active, I() = 200 µA
test mode not active, V() = 0.4 V
V() = VCC
1.5
100
2
Test Pin Pull-Down Current
Test Pin Pull-Down Current
Test Mode Activation Threshold
µA
mA
µA
0.7
80
130
3000
190
5000
Test Mode Current Ratio I()/Iph() test mode active, I() = 200 µA
1599
Power-On-Reset Circuit
901 VCCon
902 VCCoff
903 VCChys
Turn-on Threshold VCC
(power-on release)
increasing voltage at VCC
decreasing voltage at VCC
VCChys = VCCon - VCCoff
2.6
2.4
170
3.45
V
V
Turn-off Threshold VCC
(power-down reset)
1.4
50
Threshold Hysteresis
300
mV
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 10/14
Z INDEX SIGNAL
T
PA
PB
PZ
T/4
T/4
T/4
T/4
SEL
Figure 1: A-AND-B gated Z index signal at x1 interpolation (SEL = lo)
T
PA
PB
PZ
VCC
T/4 T/4 T/4 T/4
SEL
Figure 2: A-AND-B gated Z index signal at x2 interpolation (SEL = hi)
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 11/14
APPLICATION CIRCUITS
iC-HD2
iC-LTA
Disc
iC-HD2
Figure 3: Circuit example of an incremental/commutation encoder with RS422 line drivers for 5 V applica-
tions.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 12/14
iC-HD2
iC-LTA
Disc
iC-HD2
Figure 4: Circuit example of an incremental/commutation encoder with differential line drivers for a supply
voltage range of 10 V to 30 V.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 13/14
Figure 5: Circuit example of an incremental encoder for 24 V applications and long cables (supply voltage
range of 10 V to 30 V, cable length of up to 100 m).
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.
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.
iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev A4, Page 14/14
ORDERING INFORMATION
Type
Package
-
Options
Order Designation
iC-LTA
iC-LTA chip
32-pin optoQFN,
5 mm x 5 mm,
glass lid
iC-LTA oQFN32-5x5
thickness 0.9 mm
15-pin optoBGA,
6.2 mm x 5.2 mm,
thickness 1.6 mm
glass lid
iC-LTA oBGA LSH2C
15-pin optoBGA,
6.2 mm x 5.2 mm,
thickness 1.7 mm
on-chip reticle
iC-LTA oBGA LSH2C-xR
For technical support, information about prices and terms of delivery please contact:
iC-Haus GmbH
Tel.: +49 (61 35) 92 92-0
Am Kuemmerling 18
D-55294 Bodenheim
GERMANY
Fax: +49 (61 35) 92 92-192
Web: http://www.ichaus.com
E-Mail: sales@ichaus.com
Appointed local distributors: http://www.ichaus.com/sales_partners
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