[EQ0321]
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1.
Genaral Description
The EQ0321 is a programmable linear Hall IC which has two Hall elements and a processing circuit. The
output of the EQ0321 is an analog voltage and proportional with the displacement of the magnet that placed
above the EQ0321. The EQ0321 is suitable for precise position sensing to optical image stabilization, auto
focus, zoom lenses of digital steel camera.
2.
Fea
tures
□ Sensing stroke ; 1~3mm
□ Accuracy ; 0.1 % of sensing stroke (Ideal)
□ 4-line SPI interface
□ Consumption current
Power down mode ; 5 µA (Max.)
Active mode ; 5.5 mA (Typ.), 7.5 mA (Max.)
□ Power supply ; 2.7 ~ 5.5 V
□ Package size ; 10 pin, SON (2.9×3.2×0.6
.
mm)
□ Operating Temperature ; -30°C ~ 85°C
□ Compensating the temperature characteristic of the magnet and Hall elements.
Programmable linear Hall IC for 1 axis
EQ0321
[EQ0321]
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3. Table of Contents
1. Genaral Description ....................................................................................................................................... 1
2. Features .......................................................................................................................................................... 1
3. Table of Contents ........................................................................................................................................... 2
4. Block Diagram and Functions ....................................................................................................................... 3
5. Pin Configurations and Functions .................................................................................................................. 4
6. Absolute Maximum Ratings .......................................................................................................................... 5
7. Recommended Operating Conditions ............................................................................................................ 5
8. Electrical Characteristics ............................................................................................................................... 5
9. Non-volatile Memory Characteristics .......................................................................................................... 10
10. Functional Descriptions ............................................................................................................................. 10
11. Recommended External Circuits ............................................................................................................... 15
12. Package ...................................................................................................................................................... 16
13. Taping ........................................................................................................................................................ 18
14. Soldering Conditions ................................................................................................................................. 19
IMPORTANT NOTICE .................................................................................................................................. 20
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4. Block Diagram and Functions
4.1 Block Diagram
Figure 1. Block diagram of the EQ0321
4.2 Block Function
Table 1. Explanation of circuit block
Name Description
HE1, HE2 Hall elements
CONTROL BLOCK It calculates (B1-B2) / (B1+B2), adjusts gain and offset voltage, controls
HE DRIVE.
HE DRIVE It supplies the driving voltage to Hall elements.
VOLTAGE REFERENCE It generates reference voltage.
HE1
VDD VSS
VOLTAGE REFERENCE
CONTROL BLOCK
RSTN
VOUT
HE DRIVE
HE2
VCOM
CSN SCK SI SO TSTO
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5. Pin Configurations and
Functions
5.1 Pin Configurations
Figure 2. Bump down view
5.2 Pin Function
Table 2. Pin configurations and functions of the EQ0321
Pin
No.
Pin
Name
Type
(Note 1)
I/O
(Note 2) Description
1 RSTN D I When the input signal is “Low”, the power down mode is active.
Please make the input “Low” before power on.
2 CSN D I The chip select pin for serial interface.
3 SCK D I The clock input pin for serial interface.
4 SI D I The data input pin for serial interface.
5 SO D O The data output pin for serial interface.
6 VOUT A O This pin outputs the voltage which is proportional to the position
of the magnet.
Maximum capacity load = 20pF.
Minimum resistance load = 100kΩ.
7 TSTO A O This is a test pin.
This pin should be connected to V
SS.
8 VCOM A O This pin outputs the internal reference voltage (V
DD
/2).
Please connect 0.01µF to ground.
No resistance load.
9 VSS GND － Ground
10 VDD PWR － Power supply
(Note 1) A(analog pin), D(digital pin), GND(ground pin), PWR(power pin)
(Note 2) I(input pin), O(output pin).
1
2
4
SCK
RSTN
VSS
SO
SI
VDD
3
10
9
7
8
6
CSN
TSTO
VOUT
5
VCOM
TOP VIEW
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6. Absolute Maximum Ratings
If the device is used in conditions exceeding below values, the device may be destroyed. Normal operations
are not guaranteed in such exceeding conditions.
Table 3. Absolute Maximum Ratings
Ta = 25
o
C, unless otherwise specified.
Parameter Symbol Min. Max. Pin Units
Supply Voltage V
DD
-0.3 6.0 V
Input Voltage V
IN
-0.3 V
DD
+0.3 V
Storage Temperature Tstg -40 125 °C
7. Recommended Operating Conditions
Table 4. Recommended operating conditions
Parameter Symbol
Conditions Min. Typ. Max.
Units
Supply Voltage V
DD
2.7 5.5 V
Operating Temperature
Range
Ta -30 85 ℃
Input M.F.D. Range Bin (Note 1) 15 150 mT
“B1-B2” Range Bsub (Note 2) -120 120 mT
“B1+B2” Range Badd (Note 2) 70 250 mT
“(B1-B2) / (B1+B2)”
Range
Bdiv (Note 2) -0.7 0.7 -
(Note 1) Magnetic Flux Density (M.F.D.) applied into one Hall element.
(Note 2) B1, B2 = the applied magnetic flux density of each Hall elements of the EQ0321.
8. Electrical Characteristics
8.1 Analog Electrical Characteristics
Table 5. Analog Electrical Characteristics
V
DD
= 2.7 ~ 5.5 V, Ta = 25
o
C, GAIN = 2.4 and OFFSET=0mV, unless otherwise specified.
Parameter Symbol
Conditions Min. Typ. Max.
Units
Standby Current SIDD RSTN=V
SS
,
Bsub=0mT, Badd=80mT
5 µA
Consumption Current DIDD RSTN=V
DD
,
Bsub=0mT, Badd=80mT
5.5 7.5 mA
Output Sensitivity Vh (Note 1)
Bsub=±8mT, Badd=80mT
28.5 30.0 31.5 m
V
/mT
Offset Voltage VOUT0
Bsub=0mT, Badd=80mT V
DD
/2
-0.15
V
DD
/2
V
DD
/2
+0.15
V
Output High Saturation
Voltage
Vsath 100kΩ load against VSS V
DD
-0.3
V
DD
V
Output Low Saturation
Voltage
Vsatl 100kΩ load against VDD 0 0.3 V
Power On Time tpon (Note 2)
Bsub=0mT,Badd=80mT
1 ms
Reset Release Time
tRST (Note 2) 0.5 ms
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Temperature Drift of
Output Sensitivity
Vhd (Note 3)(Note 4)
Ta=-30～85°C, 25°C standard
±2 %
Temperature Drift of
Offset Voltage
Vofd (Note 3)(Note 5)
Ta=-30～85°C, 25°C standard
±30 mV
Output Noise Voltage (Note 3) (Note 6)
Badd=150mT
0.2 mVrms
Bandwidth fT (Note 3) 10 kHz
(Note 1) The Slope of a line that calculated by least-square method by Vout1 (Bsub=0, Badd=80), Vout2
(Bsub=8, Badd=80) and Vout3 (Bsub=-8, Badd=80) is equal Vh.
Vout = { Bsub / Badd } × GAIN × 1000 + VOUT0 [mV]
(Note 2) Figure 3 is a timing chart about power on. “tpon” is a time to reach less than ±1% of the offset
voltage after a reset release. “tRST” is a reset release time after V
DD
is stable.
Figure 3. Operation when the device is powered up
(Note 3) These parameters are not tested in mass production.
(Note 4) Vhd = {(Vh(Ta) – Vh(25
o
C)) / Vh(25
o
C) } × 100 [%]
(Note 5) Vofd = VOUT 0(Ta) – VOUT 0(25
o
C) [mV]
(Note 6) The external LPF circuit (fc = 2kHz)
Figure 4. LPF circuit
VDD
RSTN
VOUTX/Y
tRST
tpon
±1% of offset voltage
tRSTL
(Refer to
Table 7
)
VSS
0.01µF
VOUT
8.2 kΩ
EQ0321
[EQ0321]
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8.2 Digital DC Specification
Table 6. Digital DC Specification
V
DD
= 2.7 ~ 5.5 V, Ta = -30 ~ 85
o
C, unless otherwise specified.
Parameter Symbol
Conditions Min. Typ. Max. Units
Input High Voltage VIH RSTN, CSN, SCK, SI 0.8V
DD
V
DD
V
Input Low Voltage VIL RSTN, CSN, SCK, SI 0 0.2V
DD
V
Output High Voltage VOH SI, IOH = -400µA V
DD
-0.4
V
Output Low Voltage VOL SI, IOL = +400µA 0.4 V
Input Leakage ILI RSTN, CSN, SCK, SI -10 10 µA
Output Leakage IHL SO -10 10 µA
8.3 Digital AC Specification
Table 7. Digital AC Specification
V
DD
= 2.7 ~ 5.5 V, Ta = -30 ~ 85
o
C, Load capacitance = 30 pF, unless otherwise specified.
Parameter Symbol
Condition Min. Typ. Max. Unit
SCK Frequency fSK 10 MHz
SCK Setup time tSKSH 20 ns
CSN Setup time tCSS 40 ns
SCK Pulse Width tSKW 40 ns
SCK Rise Time tRC (Note 1) 10 ns
SCK Fall Time tFC (Note 1) 10 ns
Data Setup Time tDIS 15 ns
Data Hold Time tDIH 15 ns
Data Rise Time tRD (Note 1) 10 ns
Data Fall Time tFD (Note 1) 10 ns
SO pin Output Delay tPD 25 ns
SO pin Hi-Z Time tOZ (Note 1) 40 ns
SO pin Output Hold
Time
tOHD 0 ns
CSN Hold Time tCSH 40 ns
SCK Hold Time tSKH 20 ns
CSN High Time tCS 40 ns
EEPROM Program
Time
tWR 10 20 ms
Reset Time tRSTL (Note 2) 10 µs
(Note 1) These parameters are not tested in mass production.
(Note 2) See Figure 3.
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8.4 Synchronous Data Timing
Figure 5. Instruction Input
Figure 6. Data Output (READ)
Figure 7. Data Output (READ) at end of command
CSN
tCS
tCSS
tSKSH
tDIS
tDIH
0
0
0
Hi-Z
SI
SO
tRC
tFC
SCK
tSKW
tSKW
tFD
tRD
tSKW
tSKW
tDIS
tDIH
A0
Hi-Z
D7
D6
"L"
"H"
t
PD
tPD
SCK
CSN
SI
SO
A1
tOHD
D0
tOZ
D1
SCK
CSN
SI
SO
tCS
tCSS
t
SKSH
tPD
t
OHD
Hi-Z
0
tSKH
tCSH
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Figure 8. Data Input (WRITE)
Hi-Z
D2
D1
D0
SCK
CSN
SI
SO
tSKH
tWR
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9. Non
-
volatile Memory
Characteri
stics
Table 8. Non-volatile Memory Characteristics
V
DD
= 2.7 ~ 5.5 V, Ta = -30 ~ 85
o
C, unless otherwise specified.
Parameter Symbol
Condition Min. Typ. Max. Unit
EEPROM Endurance EEN 1000 Cycles
EEPROM Data
Retention
ERE (Note 1) 10 Years
(Note 1) Data retention is not guaranteed after rewritten over 1000 cycles
10
. Functional Descriptions
10.1 Positional relation of the magnet and the EQ0321
The EQ0321 and a magnet should be placed as Figure 9.
Figure 9. Positional relation of magnet and the EQ0321
When the magnet moves from “( - ) side” to “( + )side”, the output voltage increases with magnet position as
Figure 10.
Figure 10. The output voltage with magnet position
10.2 Output voltage, Gain, Offset
The EQ0321 has two Hall elements. The EQ0321 outputs the voltage in proportion to following equations
which operated Magnetic Flux Density (= M.F.D.) applied on each Hall element.
N
S
－側 ＋側
( - ) side
( + ) side
< Magnet moving direction >
[EQ0321]
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V
OUT
[mV] = { Bsub / Badd } × GAIN + OFFSET + VOUT0
Where, Bsub [mT] = B1 - B2
Badd [mT] = B1 + B2
B1and B2 are the applied magnetic flux density of each Hall elements of the EQ0321.
GAIN and OFFSET are defined in Section 10.4 and 10.5. These are adjustable.
10.3 Serial interface
Users can read and write the setting data to EEPROM by 4-wire synchronous serial interface. Each command
has original operation code, address and data (8bit). Input and output data are synchronized with SCK. The
data are entered with a time when SCK rises, and outputted with a time when SCK falls.
Table 9. Command Table
Command Operation code
Address Data Note
WRITE 0000 x010 A7-A0 D7-D0 (in) Write EEPROM
READ 0000 x011 A7-A0 D7-D0 (out) Read EEPROM
WREN 0000 x110 EEPROM write enable
WRDI 0000 x100 EEPROM write disable
x : Don’t care
Table 10. Memory Map
Memory Name Address
D7 D6 D5 D4 D3 D2 D1 D0
GAIN 00h 0 0 GA5 GA4
GA3
GA2
GA1
GA0
OFFSET 01h 0 0 0 0 OF3 OF2 OF1
OF0
(Note)Writing to address other than “00h” ~ “01h” is inhibited.
- 10.3.1 WREN (WRITE ENABLE) / WRDI (WRITE DISABLE)
EEPROM has two states, “write enable state” and “write disable state”. When WREN command is entered
the mode of EEPROM goes to “write enable state”. When the EQ0321 is powered on, the state is “write
disable state”.
Figure 11. WREN command
8
1
2
3
4
5
6
7
1
×
0
0
0
0
1
0
Hi
-
Z
CSN
SCK
SI
SO
×=ドント・ケア
×=Don’t care
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Figure 12. WRDI command
- 10.3.2 WRITE command
WRITE instruction can start the WRITE function to EEPROM.
After CSN pin changes high to low, operation code, address and data are entered from SI pin. After the
instruction input, the internal programming cycle starts when CSN pin changes low to high. After the
instructions are entered, CSN pin should change low to high after waiting EEPROM Program Time “tWR”
and before next SCK clock rises.
After WRITE instruction, the EQ0321 changes to Write Disable status automatically. theEQ0321 needs
WREN instruction before every WRITE instruction. When WRITE instruction is done while the EQ0321 is
in Write Disable status, WRITE instructions are ignored and the EQ0321 becomes standby status after CSN
changes to high. The EQ0321 can accept the next instruction after CSN becomes low.
O7-O0: Operation Code, A7-A0：Address, D7-D0：Data
Figure 13. WRITE sequence
- 10.3.3 READ command
After CSN changes high to low, the operation code and address are sent on SI pin and the data (D7-D0) outs
from SO pin. SI signal is ignored after a final bit (A0) is entered.
O7-O0: Operation Code, A7-A0：Address, D7-D0：Data
Figure 14. READ command
8
1
2
3
4
5
6
7
1
×
0
0
0
0
0
0
Hi
-
Z
CSN
SCK
SI
SO
×=ドント・ケア
×=Don’t care
SI
SCK
CSN
O7
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
A4
A5
A6
A7
O1
O2
O3
O4
O5
O6
O0
A0
A1
A2
A3
SO Hi-Z
16
17
18
19
20
21
22
23
D4
D5
D6
D7
D0
D1
D2
D3
SI
SCK
CSN
O7
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
A4
A5
A6
A7
O1
O2
O3
O4
O5
O6
O0
A0
A1
A2
A3
SO Hi-Z
16
17
18
19
20
21
22
23
D4
D5
D6
D7
D0
D1
D2
D3
Hi-Z
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10.4 Gain Adjustment Function (Memory Name: GAIN)
Users can change the gain of Vout by writing a setting value to EEPROM by using the serial interface. A
factory default setting value of gain is 2.4.
Table 11. GAIN Table
Setting value
GA[5]～GA[0]
Gain
[times]
Setting value
GA[5]～GA[0]
Gain
[times]
000000 1.4 010000 3.0
000001 1.5 010001 3.1
000010 1.6 010010 3.2
000011 1.7 010011 3.3
000100 1.8 010100 3.4
000101 1.9 010101 3.5
000110 2.0 010110 3.6
000111 2.1 010111 3.7
001000 2.2 011000 3.8
001001 2.3 011001 3.9
001010 2.4(default) 011010 4.0
001011 2.5 011011 4.1
001100 2.6 011100 4.2
001101 2.7 011101 4.3
001110 2.8 011110 4.4
001111 2.9 011111 4.5
Setting value
GA[5]～GA[0]
Gain
[times]
Setting value
GA[5]～GA[0]
Gain
[times]
100000 4.6 110000 6.2
100001 4.7 110001 6.3
100010 4.8 110010 6.4
100011 4.9 110011 6.5
100100 5.0 110100 6.6
100101 5.1 110101 6.7
100110 5.2 110110 6.8
100111 5.3 110111 6.9
101000 5.4 111000 7.0
101001 5.5 111001 7.1
101010 5.6 111010 7.2
101011 5.7 111011 7.3
101100 5.8 111100 7.4
101101 5.9 111101 7.5
101110 6.0 111110 7.6
101111 6.1 111111 7.7
[EQ0321]
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10.5 Offset Adjustment Function (Memory Name: OFFSET)
Users can change DC level of Vout by writing a setting value to EEPROM by using the serial interface. A
factory default setting value of DC level is 0mV.
Table 12. OFFSET Table
Setting value
OF[3]～OF[0]
DC level
[mV]
Setting value
OF[3]～OF[0]
DC level
[mV]
0000 0(default) 1000 0
0001 +100 1001 -100
0010 +200 1010 -200
0011 +300 1011 -300
0100 +400 1100 -400
0101 +500 1101 -500
0110 +600 1110 -600
0111 +700 1111 -700
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11
. Recommended Ext
ernal
Circuits
11.1 Circuit example
Figure 15. Recommended circuit
EQ0321
RSTN
CSN
SCK
SI
SO
VDD
VSS
VCOM
TSTO
VOUT
V
DD
= 2.7～5.5V
1μF
0.01μF
4-wire SPI I/F
HOST CPU
[EQ0321]
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12
. Package
12.1 Outline Dimensions and Pad Dimensions
10 pin SON package
Figure 16. Dimensional drawing of the EQ0321
1: RSTN
2: CSN
3: SCK
4: SI
5: SO
6: VOUT
7: TSTO
8: VCOM
9: VSS
10: VDD
11: N.C. （OPEN）
(Note 1) The center of the sensor is located within the φ0.2mm circle.
(Note 2) Sensor plate is located in 0.26mm depth from the package surface.
(Note 3) The tolerances of dimensions with no mention is ±0.1mm
(Note 4) There is no plating on cut surface of the terminals.
Package Type: SON
Material of Terminals: Cu
Material of Plating for Terminals: Sn 100%
Plating Thickness: 10µm (typ.)
3.2
2.9
0.6
±0.05mm
0.15
0.25
0.5
0.2
0.35 0.35
1.4 0.18
0.45
0.15
Sensor
Center
Sensor
Center
HE2
HE1
0.2
0.2
(0.26)
１
１１
１
２
２２
２
３
３３
３
４
４４
４
５
５５
５
１０
１０１０
１０
９
９９
９
８
８８
８
７
７７
７
６
６６
６
１１
１１１１
１１
2.2
±0.07
0.34
Unit: mm
[EQ0321]
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12.2 Recommended Land Pattern
Figure 17. Recommended land pattern
12.3 Marking
Figure 18. Marking of the EQ0321
Table 13. Marking information
Product Distinction Number Manufacture Year Manufacture month
Mark
Product ID Mark
Corresponding Year
Mark
Corresponding Month
1 EQ0321 0 2020 C January
2 1 2011 D February
3 2 2012 E March
4 3 2013 F April
5 4 2014 G May
6 5 2015 H June
7 6 2016 J July
8 7 2017 K August
9 8 2018 L September
0 9 2019 M October
N November
P December
0.25 0.25
0.552.7
0.5
1 2 H 1
Lot Distinction Number
Manufacture month (June）
Manufacture year (2012)
Product Distinction Number
X
1
X
2
X
3
X
4
X
1
X
2
X
3
X
4
[EQ0321]
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13. Taping
13.1 Carrier Tape
Products are supplied in the reeled tape which contains 3,000 units per reel.
Figure 19. Dimensional drawing of carrier tape
13.2 Reel Dimensions
Figure 20. Dimensional drawing of reel
Direction of devices
1 2 H 1
Unit : mm
Unit : mm
[EQ0321]
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14. Soldering Conditions
14.1 Soldering Conditions
Reflow soldering should be performed under the following conditions.
Figure 21. Reflow profile
Reflow Profile
Heating Time [s]
[EQ0321]
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IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the information contained
in this document without notice. When you consider any use or application of AKM product stipulated in this
document (“Product”), please make inquiries the sales office of AKM or authorized distributors as to current status
of the Products.
1. All information included in this document are provided only to illustrate the operation and application examples of
AKM Products. AKM neither makes warranties or representations with respect to the accuracy or completeness of
the information contained in this document nor grants any license to any intellectual property rights or any other
rights of AKM or any third party with respect to the information in this document. You are fully responsible for use
of such information contained in this document in your product design or applications. AKM ASSUMES NO
LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF
SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high
levels of quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily
injury, serious property damage or serious public impact, including but not limited to, equipment used in nuclear
facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains,
ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions,
safety devices, elevators and escalators, devices related to electric power, and equipment used in finance-related
fields. Do not use Product for the above use unless specifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible for complying
with safety standards and for providing adequate designs and safeguards for your hardware, software and systems
which minimize risk and avoid situations in which a malfunction or failure of the Product could cause loss of
human life, bodily injury or damage to property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information contained in this
document for any military purposes, including without limitation, for the design, development, use, stockpiling or
manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction
weapons). When exporting the Products or related technology or any information contained in this document, you
should comply with the applicable export control laws and regulations and follow the procedures required by such
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systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations.
5. Please contact AKM sales representative for details as to environmental matters such as the RoHS compatibility of
the Product. Please use the Product in compliance with all applicable laws and regulations that regulate the
inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. AKM assumes no
liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set forth in this
document shall immediately void any warranty granted by AKM for the Product and shall not create or extend in
any manner whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent
of AKM.
