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PDF AT77C104B Data sheet ( Hoja de datos )
| Número de pieza | AT77C104B | |
| Descripción | FingerChip Thermal Fingerprint Sweep Sensor | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Thermal Sensitive Layer Over a 0.35 µm CMOS Array
• Image Zone: 0.4 x 11.6 mm
• Image Array: 8 × 232 = 1856 Pixels
• Pixel Pitch: 50 × 50 µm = 500 dpi Resolution
• On-chip 8-bit Analog to Digital Converter
• Serial Peripheral Interface (SPI) - 2 Modes:
– Fast Mode at 16 Mbps Max for Imaging
– Slow Mode at 200 kbps Max for Navigation and Control
• Die Size: 1.5 × 15 mm
• Operating Voltage: 2.3 to 3.6V
• Operating Temperature Range: -40° C to 85° C
• Finger Sweeping Speed from 2 to 20 cm/Second
• Low Power: 4.5 mA (Image Acquisition), 1.5 mA (Navigation), <10 µA (Sleep Mode)
• Hard Protective Coating (>4 Million Sweeps)
• High Protection from Electrostatic Discharge
• Small Form Factor Packaging
Description
This document describes the specifications of Atmel’s AT77C104B fingerprint sensor
dedicated to PDA, cellular and smartphone applications. Based on FingerChip ther-
mal technology, the AT77C104B is a linear sensor that captures fingerprint images by
sweeping the finger over the sensing area. This product embeds true hardware-based
8-way navigation and click functions.
Applications
• Scrolling, Menu and Item Selection for PDAs, Cellular or Smartphone Applications
• Cellular and Smartphones-based Security (Device Protection, Network and ISP
Access, E-commerce)
• Personal Digital Agenda (PDA) Access
• User Authentication for Private and Confidential Data Access
• Portable Fingerprint Acquisition
FingerChip®
Thermal
Fingerprint
Sweep Sensor,
Hardware
Based,
Navigation and
Click Function,
SPI Interface
AT77C104B
Chip-on-board Package
Sweep your finger
to make life easier
Actual size of sensor
5347B–BIOM–08/04
1 page  
AT77C104B
Table 5. Explanation of Test Levels
Level Description
I 100% production tested at +25°C
II 100% production tested at +25°C, and sample tested at specified temperatures (AC testing done on sample)
III Sample tested only
IV Parameter is guaranteed by design and/or characterization testing
V Parameter is a typical value only
VI 100% production tested at temperature extremes
D 100% probe tested on wafer at Tamb = +25°C
Table 6. Specifications
Parameter
Symbol
Test Level
Min
Typ Max
Unit
Resolution
IV 50 Micron
Size IV 8 × 232 Pixel
Yield: number of bad pixels
I
5 Bad pixels
Equivalent resistance on TPP pin
I 23 35 47 Ohm
Power Consumption and DC Characteristics
The following characteristics are applicable to the operating temperature -40° C ≤Ta ≤+85° C.
Typical conditions are: power supply = 3.3V; Tamb = 25° C; FSCK = 12 MHz (1600 slices per second); duty cycle = 50%
CLOAD 120 pF on digital outputs unless otherwise specified.
Table 7. Power Requirements
Name Parameter
VDD
IDD
IDDNAV
IDDCLI
IDDSLP
IDDSTB
Positive supply voltage
Current on VDD in acquisition mode
Current on VDD in navigation mode
Current on VDD in click mode
Current on VDD in sleep mode
Current on VDD in stand-by mode
Conditions
Test Level
I
I
I
I
I
I
Min Typ Max Unit-
2.3 2.5/3.3 3.6
V
3 4.5 6 mA
1 1.5 2 mA
0.2 0.3 0.5 mA
10 µA
Refer to “Power Management” on page 29
Table 8. Digital Inputs
Logic Compatibility
CMOS
Name Parameter
Conditions
Test Level
Min
Typ
Max Unit
IIL
Low level input current without pull-
up device(1)
VI = 0V
I
1 µA
IIH
High level input current without
pull-down device(1)
VI = VDD
I
1 µA
5347B–BIOM–08/04
5
5 Page 
AT77C104B
Function Registers
Table 13. Registers
Register
STATUS
MODECTRL
ENCTRL
HEATCTRL
NAVCTRL
CLICKCTRL
MOVCTRL
NAVIGATION(1)
NAVIGATION(1)
NAVIGATION(1)
PIXELCLICK
PIXELCLICK
PIXELCLICK
Address (b3 down to b0)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
Read/Write
Read
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Reserved
Read
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Note: 1. Navigation requires 3 registers. The reading of the first register (0b1000) enables the
reading of all 3 registers.
5347B–BIOM–08/04
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AT77C104B.PDF ] | |
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