Rainbow Electronics AT77C104B User Manual
Fingerchip, Features, Description

5347B–BIOM–08/04
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
Chip-on-board Package
Actual size of sensor
FingerChip
®
Thermal
Fingerprint
Sweep Sensor,
Hardware
Based,
Navigation and
Click Function,
SPI Interface
AT77C104B
Sweep your finger
to make life easier
Document Outline
- Features
- Description
- Applications
- Specifications
- Power Consumption and DC Characteristics
- Switching Performances
- Timing Diagrams: Slow and Fast SPI Interface
- Functional Description
- Sensor and Block Diagram
- Function Registers
- SPI Interface General Description
- Control Interface (Slow SPI)
- Image Capture (Fast SPI)
- Navigation (Slow SPI)
- Temperature Stabilization Function and Watchdog
- Power Management
- Packaging Mechanical Data
- Ordering Information
- Appendix A
- Appendix B
- Appendix C
- Appendix D