ICHAUS PD2S39-2048

preliminary
iC-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 1/9
FEATURES
APPLICATIONS
♦ Compact encoder sensor with differential scanning and sine
outputs
♦ 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 +110 °C
♦ Code disc available
(2048 PPR +C/D 1 PPR, diameter ∅39 mm)
♦ Incremental sine encoders with
commutation information
♦ Motor feedback encoder
♦ AC and BLDC motor systems
PACKAGES
32-pin optoQFN
15-pin optoBGA
Chip
2.88 mm x 3.37 mm
BLOCK DIAGRAM
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http://www.ichaus.com
preliminary
iC-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 2/9
DESCRIPTION
iC-PD3948 is an optical sensor IC with integrated
photodiodes whose signal currents are converted
into output voltages by low-noise transimpedance
amplifiers.
Due to a high transimpedance gain of typically
4 MΩ, output signal voltages of several hundred Millivolts are obtained at illumination levels of just 1 to
3 mW/cm2 . In most cases complicated noise suppression measures are thus rendered unnecessary.
As the pin names would suggest, iC-PD3948 is typically applied as a sine encoder for motor feedback
systems. To this end, iC-PD3948 provides sine and
cosine signals with both a high resolution of 2048
PPR (plus an additional index signal) and a low resolution of 1 PPR (at C/D).
All code disc signal tracks are evaluated differentially;
the high resolution sine signals are read by photodiodes in a phased array. The layout of the signal
amplifiers is such that there is good paired channel
matching, reducing the time and effort required for
calibration to an absolute minimum.
The spectral sensitivity ranges from visible to near
infrared light, with the maximum sensitivity close to
a wavelength of 680 nm. An output voltage of 1 V
is typical in low light conditions, for instance when iCPD is illuminated at only 2 mW/cm2 by a 740 nm LED.
A relatively low LED current is enough to operate the
sensor, proving beneficial to the life expectancy of the
LED at high operating temperatures.
PACKAGES AND CHIP LAYOUT 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
PSIN
NSIN
PCOS
NCOS
Z
NZ
ND
PD
NC
PC
VRDC
VRSC
GND
+4.5...5.5 V Supply Voltage
Reference Voltage Output
Sine Track +
Sine Track Cosine Track +
Cosine Track Z Index Signal
Z Index Track D Track D Track +
C Track C Track +
D/C Track Reference
S/C Track Reference
Ground
Notes: All outputs are analog voltage
outputs.
preliminary
iC-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 3/9
PIN CONFIGURATION
oQFN32-5x5, oQFN32-N5x5 (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
9 10 11 12 13 14 15 16
dra_pdxx-oqfn32-n_pack_2, 10:1
PIN CONFIGURATION
oBGA LSH2C (6.2 mm x 5.2 mm)
1
2
3
PIN FUNCTIONS
No. Name Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
VCC
VREF
PSIN
NSIN
PCOS
NCOS
Z
NZ
ND
PD
NC
PC
VRDC
VRSC
GND
+4.5...5.5 V Supply Voltage
Reference Voltage Output
Sine Track +
Sine Track Cosine Track +
Cosine Track Z Index Signal
Z Index Track D Track D Track +
C Track C Track +
D/C Track Reference
S/C Track Reference
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.
PIN FUNCTIONS
No. Name Function
4
A
B
C
D
dra_lsh2c-pdxx_pack_2, 8:1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
VCC
VREF
GND
PSIN
NSIN
VRDC
VRSC
PCOS
NCOS
NC
PC
Z
NZ
ND
PD
+4.5...5.5 V Supply Voltage
Reference Voltage Output
Ground
Sine Track +
Sine Track D/C Track Reference
S/C Track Reference
Cosine Track +
Cosine Track C Track C Track +
Z Index Signal
Z Index Track D Track D Track +
preliminary
iC-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 4/9
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
Ta
Operating Ambient Temperature Range package oBGA LSH2C
package oQFN32-N5x5
package oQFN32-5x5*
T02
Ts
Storage Temperature Range
package oBGA LSH2C,
package oQFN32-N5x5, oQFN32-5x5*
T03
Tpk
Soldering Peak Temperature
package oBGA LSH2C
Unit
Min.
Typ.
Max.
-40
-40
-40
110
110
110
°C
°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-N5x5, 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-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 5/9
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
12
5.5
V
16
mA
11
V
-0.3
V
950
nm
Photosensors
101
λ ar
Spectral Application Range
102
103
λ pk
Peak Sensitivity Wavelength
Aph()
Radiant Sensitive Area
DPSIN, DNSIN, DPCOS, DNCOS
DPC, DNC, DPD, DND
DPZ, DNZ
104
S(λ )
Spectral Sensitivity
105
106
S(λ pk)max Maximum Spectral Sensitivity
E()mx
λ LED = 740 nm, Vout() not saturated
DPSIN, DNSIN, DPCOS, DNCOS
1.2
2.0
3.2
DPC, DNC, DPD, DND
3.0
4.5
6.5
DPZ, DNZ
2.8
4.2
6.0
Irradiance For Maximum Signal
Level
680
nm
0.075
0.033
0.042
mm2
mm2
mm2
λ LED = 740 nm
0.5
A/W
λ LED = λ pk
0.55
A/W
mW/
cm2
mW/
cm2
mW/
cm2
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
Of Paired Amplifiers
210
∆Vout()pn Signal Matching
no illumination, any output to any output
211
∆Vout()pn Signal Matching
no illumination, P vs. N path per diff. channel
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
280
nA
1.2
2.0
V/µW
4.0
5.46
-0.12
P.. channel vs. corresponding N.. channel
-0.2
MΩ
%/°C
0.2
%
-35
35
mV
-2.5
2.5
mV
280
kHz
120
180
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
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
Signal References VRSC, VRDC
401
Vout()
Reference Voltage
600
770
1000
mV
402
Isc()hi
Short-Circuit Current hi
current to ground
100
420
800
µA
403
Isc()lo
Short-Circuit Current lo
current to IC
250
480
700
µA
404
Ri()
Internal Output Resistance
70
110
180
Ω
preliminary
iC-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 6/9
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.
770
1000
mV
+10
mV
Reference Voltages VREF
501
Vout()
Reference Voltage
I(VREF) = 0...+1.6 mA
600
502
dVout()
Load Balancing
I(VREF) = 0...+1.6 mA
-10
503
Isc()hi
Short-Circuit Current hi
current to ground
200
420
800
µA
504
Isc()lo
Short-Circuit Current lo
current to IC
2
4.5
10
mA
iC-PD3948
preliminary
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 7/9
APPLICATION CIRCUITS
iC-MSB
Disc
iC-PD3948
iC-MSB
Figure 1: Application example motor feedback encoder
iC-MSB
Disc
iC-TW3
iC-PD3948
Figure 2: Application example motor feedback encoder
iC-PD3948
preliminary
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 8/9
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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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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-PD3948
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048
Rev B4, Page 9/9
ORDERING INFORMATION
Type
Package
Options
iC-PD3948
-
iC-PD3948 chip
32-pin optoQFN,
5 mm x 5 mm x 0.9 mm
(backside paddle exposed)
iC-PD3948 oQFN32-5x5
32-pin optoQFN
5 mm x 5 mm x 1.4 mm
iC-PD3948 oQFN32-N5x5
15-pin optoBGA
6.2 mm x 5.2 mm
iC-PD3948 oBGA LSH2C
Code Disc 2048+1 PPR
OD/ID ∅39/13 mm
Order Designation
PD2S 39-2048
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