AT77C101B ATMEL | Alldatasheet
Document overview
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Technical content
Features
Sensitive Layer Over a 0.8 µm CMOS Array Image Zone: 0.4 x 14 mm = 0.02" x 0.55" Image Array: 8 x 280 = 2240 pixels Pixel Pitch: 50 µm x 50 µm = 500 dpi Pixel Clock: up to 2 MHz Enabling up to 1780 Frames per Second Die Size: 1.7 x 17.3 mm Operating Voltage: 3 V to 5.5 V Naturally Protected Against ESD: > 16 kV Air Discharge Power Consumption: 20 mW at 3.3 V, 1 MHz, 25°C Operating Temperature Range: -40°C to +85°C Resistant to Abrasion: >1 Million Finger Sweeps Chip-on-Board (COB), Chip-on-Board (COB) with Connector, or 20-lead Ceramic DIP Available for Development, with Specific Protective Layer
Applications
PDA (Access Control, Data Protection) Cellular Phones, SmartPhones (Access e-business) Notebook, PC-add on (Access Control, e-business) PIN Code Replacement Automated Teller Machines, POS Building Access Electronic Keys (Cars, Home,...) Portable Fingerprint Imaging for Law Enforcement TV Access Figure 1. FingerChip™ Packages
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Table 1. Pin Description for Chip-on-Board Package: AT77C101B-CB01Ι
2 AVE Analog output
3 AVO Analog output
5 TPE Digital input
8 RST Digital input
9 PCLK Digital input
10 OE Digital input
11 ACKN Digital output
12 De0 Digital output
13 Do0 Digital output
14 De1 Digital output
15 Do1 Digital output
16 De2 Digital output
17 Do2 Digital output
18 De3 Digital output
19 Do3 Digital output
20 FPL GND
21 GND GND
Note: 1. Ref Connector: FH18-21S-0.3SHW (HIROSE). Table 2. Pin Description for COB with Connector Package: AT77C101B-CB02Ι(1)
2 Not connected
3 Not connected
4 DE3 Digital output
5 DO3 Digital output
6 DE2 Digital output
7 DO2 Digital output
8 DE1 Digital output
9 DO1 Digital output
10 DE0 Digital output
11 DO0 Digital output
12 AVE Analog output
13 AVO Analog output
14 TPP Power
15 TPE Digital input
16 VCC Power
17 GND GND
18 RST Digital input
19 PCLK Digital input
20 OE Digital input
21 ACKN Digital output
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Figure 2. COB with Flex(1) Figure 3. Flex Output Side Note: 1. Flex is not provided by ATMEL.
which no optics, no prism and no light source are required. ture physical effects for fingerprint sensing. software can reconstruct a full 8-bit fingerprint image. Board package assembly. These facts contribute to a low-cost device. an easy device to include in any system for identification or verification applications. ing conditions. Long exposure to maximum ratings may affect device reliability. Table 1. Absolute Maximum Ratings(1) Table 2. Recommended Cond itions Of Use
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Table 3. Resistance Table 4. Specifications
Table 5. 3.3 V Power supply
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Table 6. 5 V Power Supply C load 120 pF on digital outputs, analog outputs disconnected unless otherwise specified.
Table 7. Switching Performances Table 8. 5.0 V ±10% Power Supply Table 9. 3.3 V ±10% Power Supply
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Figure 4. Reset Figure 5. Read One Byte/Two Pixels
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Figure 8. AT77C101B Block Diagram read for each clock pulse (4). Figure 9. Functional Description time. The integration time begins with a reset of the pixel to a predefined initial state. Note that the integration time reset has nothing to do with the reset of the digital section. the integration time, electrical charges are generated at the pixel level.
the pixel into digital data that can be used by a processor. Start Sequence A reset is not necessary between each frame acquisition.
- Setting the RST pin to high
- Setting the RST pin to low
- Sending 4 clock pulses (due to pipe-line)
- Sending clock pulses to skip the first frame
Figure 10. Start Sequence Reset must be low when reading the frames. The clock is taken into account on its falling edge and data is output on its rising edge. exchange to switch to read/write mode.
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for the analog to digital conversion). Significant Bit (MSB) is bit 3, and the Least Significant Bit is bit 0. Figure 11. Pixel Order temperature information on the last two bytes. pulses), so it is an easy pattern to recognize for synchronization purposes.
AT77C101B FingerChip™ 2150B–BIOM–09/03 Thermometer The dummy bytes DB3 and DB4 contain some internal and temperature information. The even nibble nnnn in DB3 can be used to measure an increase or decrease of the chip’s temperature, using the difference between two measures of the same physical device. The following table gives values in Kelvin. For code 0 and 15, the absolute value is a minimum (saturation). When the image contrast becomes faint because of a low temperature difference between the finger and the sensor, it is recommended to use the temperature stabiliza- tion circuitry to increase the temperature by two codes (that is from 8 to 10), so as to obtain a sensor increase of at least >1.4 Ke lvin. This enables enough contrast to obtain a proper fingerprint reconstruction. nnnn Decimal nnnn Binary Temperature differential with code 8 in Kelvin 15 1111 > 11.2 14 1110 8.4 13 1101 7 12 1100 5.6 11 1011 4.2 10 1010 2.8 9 1001 1.4 8 1000 0 7 0111 -1.4 6 0110 -2.8 5 0101 -4.2 4 0100 -5.6 3 0011 -7 2 0010 -8.4 1 0001 -11.2 0 0000 < -16.8
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as regular as possible, so as to obtain consistent fingerprint slices. If the integration time is not regular, the contrast can vary from one frame to another. detect the finger, for instance). Figure 12. Read One Frame Figure 13. Regular Integration Time
The simplest and most efficient is to cut the power supply using external means.
- Set the reset RST pin to high. By doing this, all analog sections of the device are
- Set the clock PCLK pin to high (or low), thus stopping the entire digital section.
- Set the TPE pin to low to stop the temperature stabilization feature.
- Set the Output Enable OE pin to high, so that the output is forced in HiZ.
Figure 14. Nap Mode the power supply, generally less than the tested value. input, the digital section does not consume any current (no current is drained in the I/O). age (it is almost the same from 3 to 5.5 V). ing machine (120 pF load on each I/O), and a maximum of 50 pF is recommended. by 1 Kelvin in one second. With the 30 Ω typical value, 300 mW is 3 V applied on TPP.
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Figure 15. Product Reference: AT77C101B-CB01Ι Figure 16. Product Reference: AT77C101B-CB01Ι
AT77C101B FingerChip™ 2150B–BIOM–09/03 Figure 17. Product Reference: AT77C101B-CB02Ι
Package Information
Electrical Disturbances When looking at the fingerchip device from the top with the glob top to the right, the right edge must never be in contact with customer casing or any component to avoid electri- cal disturbances. Figure 18. Epoxy Overflow Maximum epoxy overflow width: 0.55 mm on the die edge. Maximum epoxy overflow thickness: 0.33 mm.Note: Refer to Figure 15 on page 18.
0.8 MAX
1.5 MAX
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2150B–BIOM–09/03
Ordering Information
Note: AT77C101B part number replaces FCD4B14 and refers to same sensor. To order 20 lead ceramic DIP for development, contact Atmel. AT77C 101B- Ι — Atmel prefix Temperature range I: -40o C to +85o C Quality level: — : standard Package CB01: Chip On Board (COB) CB02: COB with connector CBXX FingerChip family Device type
Printed on recycled paper. Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Atmel Corporation Atmel Operations
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www.atmel.com/literature 2150B–BIOM–09/03 0M © Atmel Corporation 2003 . All rights reserved. Atmel® and combinations thereof, are the registered trade- marks of Atmel Corporation or its subsidiaries. FingerChip™ is the trademark of Atmel. Other terms and product names may be the trademarks of others.