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PDF A2639B Data sheet ( Hoja de datos )
| Número de pieza | A2639B | |
| Descripción | USB+PS/2 Optical Mouse Sensor SOC | |
| Fabricantes | APEXONE | |
| Logotipo |  |
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A2639B
USB+PS/2 Optical Mouse Sensor SOC
CONTENTS
1. DESCRIPTION ........................................................................................................................................................ 2
1.1 FEATURES ........................................................................................................................................................... 2
2. BLOCK DIAGRAM................................................................................................................................................. 3
3. PIN ASSIGNMENT ................................................................................................................................................. 3
4. PIN DESCRIPTION ................................................................................................................................................ 4
5. FUNCTION DEFINITION...................................................................................................................................... 4
5.1 USB & PS/2 PLUG AND PLAY FUNCTION ............................................................................................................ 4
5.1.1. Power-On-Reset function........................................................................................................................... 4
5.1.2. Power-down-set function ........................................................................................................................... 4
5.2 DE-BOUNCE CIRCUITS ......................................................................................................................................... 4
5.3 BUILT-IN REGULATORS ........................................................................................................................................ 5
5.4 NO CRYSTAL FUNCTION...................................................................................................................................... 6
5.5 EXTERNAL OPTION FOR USB-ONLY OR USB/PS2 IN A2639B ............................................................................. 6
5.6 SUSPEND FUNCTION ............................................................................................................................................ 6
5.6.1. Suspend mode definition ............................................................................................................................ 6
6. ELECTRICAL CHARACTERISTICS .................................................................................................................. 6
6.1 ABSOLUTE MAXIMUM RATINGS.......................................................................................................................... 6
6.2 RECOMMENDED OPERATING CONDITIONS .......................................................................................................... 7
6.3 AC ELECTRICAL SPECIFICATIONS ....................................................................................................................... 7
6.4 USB ELECTRICAL SPECIFICATIONS ..................................................................................................................... 7
6.5 USB TIMING SPECIFICATIONS............................................................................................................................. 8
6.6 DC ELECTRICAL SPECIFICATIONS ..................................................................................................................... 10
7. TYPICAL PERFORMANCE CHARACTERISTICS ........................................................................................ 11
8. TYPICAL APPLICATION (Z AXIS IS MECHANICAL).................................................................................. 12
9. PCB ASSEMBLY.................................................................................................................................................... 13
10. PACKAGE AND ASSEMBLY .......................................................................................................................... 14
Rev1.0
Page 1
5/11/2011
1 page  
A2639B
USB+PS/2 Optical Mouse Sensor SOC
5.3 Built-in regulators
A2639B generates analog reference voltage and digital core power supply by LDO. The analog reference voltage
is connected to external decoupling capacitor by pin AVDD. In order to guarantee the stability of LDO, the
external capacitor is chose carefully to satisfy the spec illustrated in following figure.
Fig. 5-1 Relationship 1μF decoupling capacitor ESR and LDO output current
Rev1.0
Fig. 5-2 Relationship 3.3μF decoupling capacitor ESR and LDO Output current
Page 5
5/11/2011
5 Page 
A2639B
USB+PS/2 Optical Mouse Sensor SOC
Voltage
Output Port Sink Current
LED pad equivalent resistor
IOL1
RLED
14
30 mA VOL=1.0V for LED
22 Ω
VOL=1.0V for LED, see Fig. 6-6
LED current
80
70
60
50
40
30
20
10
00
0
66
59.8
46.6
66.7 68.4 69
26.5
0.5 1 1.5 2 2.5 3 3.5
V-gate(V)
69.5 69.970.65
4 4.5 5
Fig. 6-6 LED pad typical sink current vs. VOL
7. Typical Performance Characteristics
70
60
50
40
30
20
10
0
2.2mm
2.3mm
Distance VS Performance
2.4mm
2.5mm
2.6mm
optical distance
2.7mm
2.8mm
A2637
Fig. 7-1 Performance vs. the distance from surface to lens bottom
Rev1.0
Page 11
5/11/2011
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet A2639B.PDF ] | |
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