Sony CXA3621GE Datasheet

CXA3621GE
Fingerprint Sensor
Description
method fingerprint sensor.
This monolithic IC integrates the sensor block, sense amplifier (3-bit gain adjustment), sample-and­hold, 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.
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
30 pin LLGA (Plastic)
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 V
Input voltage VI VSS – 0.5 to VDD + 0.5 V
Output voltage VO VSS – 0.5 to VDD + 0.5 V
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –25 to +125 °C
Allowable power dissipation PD 1100 mW
Recommended Operating Conditions
Supply voltage AVDD, DVDD 2.7 to 3.6 V
Ambient operating temperature Ta 0 to +50 °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
Block Diagram
CXA3621GE
C_SP
UC
XSP (D/I)
CLK (D/I)
ADCLK (D/O)
Timing
Generator
S_CNT
Load
R_SP
UC UC
UC UC
SENSOR
UC UC UC UC
...........
192
192
Sense AMP (×192)
192
S/H & SW (×192)
192
Row Shift Register
...........
UC UC
UC UC
.........
128
128
........
C_CLK
Column Shift Register
3bit
DAC
Output
Buffer
3
DI (D/I)
AOUT (A/O)
R_CLK
VOS (Bias)
– 2 –
Detailed Block Diagram
CXA3621GE
C_SP
...........
192 (Dummy)
...........
UC UC UC UC UCUC
SVss[1:128]
128
DUMMY SENSOR
SVss[1:128]
........
UC
UC
UC
C_CLK
C_LOG
SR[1:128]
SR[1:128]
.........
128
SENSOR (UC)
128
C_COUT
UC
SVss
UC
SR
................
192
................
UC
C[1:192]
UC UC UC UC UC
IN_N[1:192]
192
VCS_O
BIAS_O
DUMMY
SAMP
SAMP (192)
S[4:5]
S[3:5]N
DD
SV
VM
PAMP_D
OUT
VCSN
OAMP
SD1
OUT
SC[1:192] SC[1:192]N
SC[1:192] SC[1:192]N
192 192
VOS
PAMP_S
S[6:7]
S[6:7]N
R_LOG
CLK
DCLK
C_CO
XSP
DC_VOS
BUF
LAND No.
7C 7D
7E
7F 6B
6C
6D
6E
6F
5B
5C 5D
5E
5F
4F
4E
4D 4C
4B
3F
28 27
26
25 24
23
22
21
20
19
18 17
16
15
14
13
12 11
10
9
Pin Symbol SGND (P/S) AV
DD (P/S)
AVss (P/S)
AOUT (A/O) VOS (Bias)
VCS_O (Bias)
NC
DD (P/S)
DV
DV
SS (P/S)
CSRO (D/O)
RSRO (D/O) C_CK (D/O)
ADCLK (D/O)
SVDS (D/O)
PS (D/I)
CLK (D/I)
XSP (D/I) DI2 (D/I)
DI1 (D/I)
DI0 (D/I)
DSR DSVss
C_SP
TG
S[4:5]
C_CLK
S[3:5]N
DCLK
SR
SD1
SD
DI[0:1]
SVDS
DC_VM
– 3 –
BIAS_SA
8
TEST3 (D/I)
TEST2 (D/I)
7
TEST1 (D/I)
6
5
VCS_S (Bias)
4
VM (Bias)
3
AV
AV
2
SGND (P/S)
1
SS (P/S)
DD (P/S)
3E
3D
3C
3B
2F
2E
2D
2C
Pin Description
CXA3621GE
Serial
No.
1 2
3 4 5
6 7 8
9 10 11
12
Land No.
2B 2C 2D
2E
2F
3B 3C 3D
3E
3F
4B 4C
4D
Symbol SUB SGND AVDD
AVSS VM VCS_S
TEST1 TEST2 TEST3 DI0 DI1 DI2
XSP
I/O Power Power Power
Power
A/O A/O
D/I
D/I
D/I
D/I
D/I
D/I
D/I
Description
Substrate electrode (chip rear surface electrode) 3.0V (VDD). Sensor lightning conductor electrode. (Connect to the GND which
is the other system of operating power supply.) Analog power supply 3.0V. Analog GND. Sense amplifier reference voltage monitor 1.5V (1/2 VDD).
(Do not connect.) Sense amplifier current source bias monitor. (Do not connect.) Test mode selection. (Connect to GND.) Test mode selection. (Connect to GND.) Test mode selection. (Connect to GND.) Gain setting input (LSB). Gain setting input. Gain setting input (MSB). Sense start pulse (negative pulse).
The column and row shift registers and the timing generator are
cleared by this signal. 13 14 15 16 17 18 19 20 21 22 23
24 25
26 27
28
4E 4F 5F
5E 5D 5C
5B
6F
6E 6D 6C
6B
7F
7E 7D
7C
CLK PS SVDS ADCLK C_CK RSRO CSRO DVSS DVDD NC VCS_O
VOS AOUT
AVSS AVDD
SGND
D/I
D/I D/O D/O D/O D/O D/O
Power Power
A/O A/O A/O
Power Power
Power
Main clock 2MHz. Power saving mode setting. (Low: Operation; High: Standby) Integrating pulse monitor. (Do not connect.) Delay clock. (Do not connect.) Column shift register clock. (Do not connect.) Column shift register final output. (Do not connect.) Row shift register final output. (Do not connect.) Digital GND. Digital power supply 3.0V. No connection. (Do not connect.) Output amplifier current source bias monitor. (Do not connect.) Output amplifier reference voltage monitor 1.09V (4/11VDD).
(Do not connect.) Sensor output. Analog GND. Analog power supply 3.0V. Sensor lightning conductor electrode. (Connect to the GND which
is the other system of operating power supply.)
– 4 –
CXA3621GE
Electrical Characteristics
DC Characteristics (Vss = 0V, Ta = 25°C)
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
IDD1
IDD2 VIH
VIL VOH VOL
IL VM
VOS
VDD = 3V, P/S = L
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
Conditions
Min.
2.7
2.7
5.0
0.7VDD Vss
2.6 0
–1
1.4
1.00
Typ.
3.0
3.0
8.5
1.5
1.09
Max.
3.6
3.6
13.0
5
VDD
0.3VDD
3.0
0.4 1
1.6
1.20
Unit
V V
mA
µA
V V V V
µA
V V
AC Characteristics (VDD = 3.0V, VSS = 0V, Ta = 25°C)
Item
Clock input period
Symbol
CLK
Conditions
Min.
400
Typ. Max.
Unit
ns
Number of sensor defects
1
Output voltage (Air_Level) Output voltage (Water_Level)
1
Output voltage Air Level means the output level in the condition where nothing is placed against the sensor
AOUT AOUT
2
0 850 950
1090 1200
3 1350 1450
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).
Defects
mV mV
– 5 –
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