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PDF CXA3621GE Data sheet ( Hoja de datos )
| Número de pieza | CXA3621GE | |
| Descripción | Fingerprint Sensor | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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Fingerprint Sensor
CXA3621GE
Description
The CXA3621GE is an electrostatic capacitance
method fingerprint sensor.
This monolithic IC integrates the sensor block,
sense amplifier (3-bit gain adjustment), sample-and-
hold, output amplifier and output buffer needed to
acquire fingerprint images, as well as the timing
generator for determining the operation of these
functions onto a single chip.
30 pin LLGA (Plastic)
Features
• Electrostatic capacitance type sensor (charge transfer method)
• Number of pixels: 192 × 128
• 317 DPI
• Low power consumption (50mW or less) ∗ When P/S: 18µW or less
• Single 3.0V power supply
• Sensor gain control: 3 bits
• S/N ratio improved by on-chip sensor block parasitic capacitance cancel function
Applications
Fingerprint verification units
Structure
Silicon gate CMOS IC
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
AVDD, DVDD VSS – 0.5 to +7.0
• Input voltage
VI VSS – 0.5 to VDD + 0.5
• Output voltage
VO VSS – 0.5 to VDD + 0.5
• Operating temperature
Topr
–20 to +75
• Storage temperature
Tstg
–25 to +125
• Allowable power dissipation
PD
1100
V
V
V
°C
°C
mW
Recommended Operating Conditions
• Supply voltage
AVDD, DVDD
• Ambient operating temperature Ta
2.7 to 3.6
0 to +50
V
°C
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E02127-PS
1 page  
CXA3621GE
Electrical Characteristics
DC Characteristics
Item
Analog supply voltage
Digital supply voltage
Current consumption
(for operation)
Current consumption
(for standby)
Input voltage (High)
Input voltage (Low)
Output voltage (High)
Output voltage (Low)
Input leak current
Output voltage
Output voltage
Symbol
AVDD
DVDD
Conditions
IDD1 VDD = 3V, P/S = L
IDD2
VIH
VIL
VOH
VOL
IL
VM
VOS
VDD = 3V, P/S = H, CLK = L
Digital (CMOS) input cell
Digital (CMOS) input cell
VDD = 3V, IOH = –800µA
VDD = 3V, IOL = 2.4mA
VDD = 3V,
digital (CMOS) input cell [3V/0V]
VDD = 3V
VDD = 3V
(Vss = 0V, Ta = 25°C)
Min. Typ. Max. Unit
2.7 3.0 3.6 V
2.7 3.0 3.6 V
5.0 8.5 13.0 mA
5 µA
0.7VDD
Vss
2.6
0
VDD
0.3VDD
3.0
0.4
V
V
V
V
–1 1 µA
1.4 1.5 1.6
1.00 1.09 1.20
V
V
AC Characteristics
Item Symbol
Clock input period
CLK
Number of sensor defects
Output voltage (Air_Level)
Output voltage (Water_Level)
AOUT
AOUT
∗1
∗2
Conditions
(VDD = 3.0V, VSS = 0V, Ta = 25°C)
Min. Typ. Max. Unit
400 ns
0 3 Defects
850 1090 1350 mV
950 1200 1450 mV
∗1 Output voltage Air Level means the output level in the condition where nothing is placed against the sensor
surface (in other words, in air). This rating value is obtained by measuring 32 points within one line of the
sensor output and then taking the average.
The gain setting for this measurement is (011).
∗2 Output voltage Water Level specifies the degree to which the output level changes from the Air Level when
a drop of water is placed on the sensor surface. However, it is unrealistic to place a drop of water on each
sensor surface when sorting products, so 32 virtual capacitors (parasitic capacitance equal to the level
when a drop of water is placed on the surface) are built into the sensor chip, and the average of these
output values is calculated. The difference from the Air Level noted above becomes the Water Level.
The gain setting for this measurement is (011).
–5–
5 Page 
CXA3621GE
Notes on Operation
Sensor surface electrostatic strength
Aerial discharge (150pF, 330Ω): ±12kV or more
Sony conducts tests using the 50% flash-over method∗ from the viewpoint of reproducibility and comparison of
performance. This method allows more stable measurement than the general method of approaching a
discharge gun (approach method). However the discharge distance tends to be longer than for the approach
method, so the above performances may not be satisfied if testing is performed by the approach method.
∗The discharge distance (distance between the probe tip and the test piece) is determined, and a trigger is
applied at fixed time intervals to raise the applied voltage and start discharge. The applied voltage when
discharge occurs at just 1/2 of the number of trigger times is the 50% flash-over voltage. The flash-over voltage
changes when the distance is changed, but it has been confirmed that there are no problems in terms of
sensor performance up to ±12kV.
Sensor surface strength
The sensor surface may be broken by the contact of the metal and others.
Therefore, be sure to pay the sufficient attention to handling this IC.
∗Never handle sensors with metal tweezers or similar tools on mounting lines, etc.
– 11 –
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CXA3621GE.PDF ] | |
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