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PDF EQ0321 Data sheet ( Hoja de datos )
| Número de pieza | EQ0321 | |
| Descripción | Programmable linear Hall IC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[EQ0321]
EQ0321
Programmable linear Hall IC for 1 axis
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. Features
□ 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
□ Operating Temperature
; 10 pin, SON (2.9×3.2×0.6.mm)
; -30°C ~ 85°C
□ Compensating the temperature characteristic of the magnet and Hall elements.
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[EQ0321]
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 oC, unless otherwise specified.
Parameter
Symbol
Min.
Max.
Supply Voltage
VDD -0.3
6.0
Input Voltage
VIN -0.3 VDD+0.3
Storage Temperature
Tstg -40 125
Pin
Units
V
V
°C
7. Recommended Operating Conditions
Table 4. Recommended operating conditions
Parameter
Symbol
Conditions
Min. Typ.
Supply Voltage
VDD
2.7
Operating Temperature Ta
-30
Range
Input M.F.D. Range
Bin (Note 1)
15
“B1-B2” Range
Bsub (Note 2)
-120
“B1+B2” Range
Badd (Note 2)
70
“(B1-B2) / (B1+B2)”
Bdiv (Note 2)
-0.7
Range
(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.
Max.
5.5
85
150
120
250
0.7
Units
V
℃
mT
mT
mT
-
8. Electrical Characteristics
8.1 Analog Electrical Characteristics
Table 5. Analog Electrical Characteristics
VDD = 2.7 ~ 5.5 V, Ta = 25 oC, GAIN = 2.4 and OFFSET=0mV, unless otherwise specified.
Parameter
Symbol
Conditions
Min. Typ. Max.
Standby Current
SIDD
RSTN=VSS,
Bsub=0mT, Badd=80mT
5
Consumption Current DIDD
RSTN=VDD,
Bsub=0mT, Badd=80mT
5.5 7.5
Output Sensitivity Vh (Note 1)
28.5 30.0 31.5
Bsub=±8mT, Badd=80mT
Offset Voltage
VOUT0 Bsub=0mT, Badd=80mT
VDD/2 VDD/2 VDD/2
-0.15
+0.15
Output High Saturation Vsath
Voltage
100kΩ load against VSS
VDD-0.3
VDD
Output Low Saturation Vsatl 100kΩ load against VDD
0
0.3
Voltage
Power On Time
tpon (Note 2)
1
Bsub=0mT,Badd=80mT
Reset Release Time tRST (Note 2)
0.5
Units
µA
mA
mV/mT
V
V
V
ms
ms
MS1436-E-00
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[EQ0321]
VOUT [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.
Command
WRITE
READ
WREN
WRDI
Operation code
0000 x010
0000 x011
0000 x110
0000 x100
Table 9. Command Table
Address
Data
A7-A0
A7-A0
D7-D0 (in)
D7-D0 (out)
Note
Write EEPROM
Read EEPROM
EEPROM write enable
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”.
CSN
SCK
SI
SO
123456 78
0 0 0 0×1 1 0
Hi-Z
××==ドDンoトn’・tケcaアre
Figure 11. WREN command
MS1436-E-00
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2013/04
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet EQ0321.PDF ] | |
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